(Extracted from wipo)
Title of invention: Power converter
Technical field
[0001]
　The present invention relates to a power conversion device including a power semiconductor module.
Background
[0002]
　In recent years, power conversion devices that perform power conversion by switching operation of power semiconductor elements such as inverters mounted on railway vehicles are widely used. The power semiconductor element is sealed with a resin to constitute a power semiconductor module. The power semiconductor module is used in a power converter.
[0003]
　Further, a semiconductor module called a 2-in-1 module in which a pair of power semiconductor elements on the positive electrode side and the negative electrode side that constitute the upper and lower arms corresponding to one phase of the inverter is also widely used.
[0004]
　In order to perform switching of the power semiconductor element, a terminal for controlling the semiconductor module is provided. In patent document 1, the semiconductor module provided with an auxiliary terminal is disclosed.
Prior art documents
Patent Literature
[0005]
Patent Document 1: Japanese Patent Application Laid-Open No. 2014-120734
Summary of the Invention
Problems to be solved by the invention
[0006]
　Conventionally, a terminal for controlling a semiconductor module has been wired with a cable in order to connect to a control circuit. For example, when a control terminal and a control circuit are connected to a 2-in-1 module semiconductor module by conventional cable wiring, the gate terminal and source terminal of the upper arm of the semiconductor module, and the gate terminal and source terminal of the lower arm are respectively connected to the four terminals. It is necessary to connect to the control circuit, and four cable wirings are necessary to connect one semiconductor module and the control circuit. When the number of cable wirings is large, there is a problem that the power converter becomes large.
Means for solving the problem
[0007]
　The power converter of the present invention has a first main terminal, a second main terminal, and a third main terminal, the collector potential or the drain potential is connected to the first main terminal, and the gate potential is the first A first semiconductor element connected to the signal terminal, an emitter potential or a source potential connected to the third main terminal and the second signal terminal, a collector potential or a drain potential connected to the third main terminal, and a gate A potential connected to the third signal terminal; an emitter potential or a source potential connected to the second main terminal and the fourth signal terminal; a second semiconductor element connected in series with the first semiconductor element; A first wiring connected to the first signal terminal, a second wiring connected to the second signal terminal, and a third wiring connected to the third signal terminal. Fourth arrangement connected to the fourth signal terminal And having a first external connection terminal to which the first wiring and the second wiring are connected, and a second external connection terminal to which the third wiring and the fourth wiring are connected. The first wiring and the third wiring are formed on the first layer with the insulating region interposed therebetween, and the second wiring and the fourth wiring are formed on the second layer with the insulating region interposed therebetween. With.
The invention's effect
[0008]
　The power conversion device according to the present invention has a first main terminal, a second main terminal, and a third main terminal, the collector potential or the drain potential is connected to the first main terminal, and the gate potential is the first potential. The emitter potential or source potential is connected to the third main terminal and the second signal terminal, and the collector potential or drain potential is connected to the third main terminal. The gate potential is connected to the third signal terminal, the emitter potential or the source potential is connected to the second main terminal and the fourth signal terminal, and the second semiconductor element is connected in series with the first semiconductor element. , A first wiring connected to the first signal terminal, a second wiring connected to the second signal terminal, and a third wiring connected to the third signal terminal And connected to the fourth signal terminal A first external connection terminal to which the first wiring and the second wiring are connected; a second external connection terminal to which the third wiring and the fourth wiring are connected; The first wiring and the third wiring are formed on the first layer with the insulating region interposed therebetween, and the second wiring and the fourth wiring are formed on the second layer with the insulating region interposed therebetween. By providing the multilayer substrate, the number of cable wirings can be reduced, and the power converter can be downsized.
Brief Description of Drawings
[0009]
FIG. 1 is a circuit diagram showing a main configuration of a power conversion device 1 according to a first embodiment.
FIG. 2 is a plan view of a package containing the semiconductor module according to the first embodiment.
FIG. 3 is a plan view of a multilayer substrate used in the power conversion device 1 according to the first embodiment.
FIG. 4 is a diagram showing pattern examples of second to fourth layers of a multilayer substrate used in the power conversion device 1 according to the first embodiment.
FIG. 5 is a diagram showing a main configuration of the power conversion device 1 according to the first embodiment.
FIG. 6 is a diagram illustrating a power conversion device 2 according to a second embodiment.
FIG. 7 is a diagram illustrating a pattern example of a second layer of a multilayer substrate used in the power conversion device 2 according to the second embodiment.
FIG. 8 is a diagram illustrating a power conversion device 3 according to a third embodiment.
FIG. 9 is a diagram showing a pattern example of the second layer of the multilayer substrate used in the power conversion device 3 according to the third embodiment.
FIG. 10 is a circuit diagram showing a main configuration of a power conversion device 3 according to a third embodiment.
FIG. 11 is a diagram showing a power conversion device 4 according to a fourth embodiment.
FIG. 12 is a circuit diagram showing a main configuration of a power conversion device 4 according to a fourth embodiment.
FIG. 13 is a diagram illustrating an example of an inter-parallel oscillating current.
BEST MODE FOR CARRYING OUT THE INVENTION
[0010]

　First Embodiment FIG. 1 is a circuit diagram showing a main configuration of a power converter 1 according to a first embodiment. FIG. 1 is a circuit diagram showing a semiconductor module 10 used in the power conversion device 1. The semiconductor module 10 includes a first semiconductor element A1 connected to the main terminal 10P and a second semiconductor element B1 connected to the main terminal 10N. The semiconductor element A1 and the semiconductor element B1 are connected in series, and the electrical connection point is connected to the main terminal 10AC.
[0011]
　The semiconductor module 10 constitutes, for example, a U-phase leg of a three-phase two-level inverter circuit. The semiconductor element A1 is also referred to as a positive arm or an upper arm, and the semiconductor element B1 is also referred to as a negative arm or a lower arm.
[0012]
　The semiconductor element A1 is provided with a drain terminal D1 connected to the main terminal 10P, a source terminal S1 connected to the main terminal 10AC, a first signal terminal GC1, and a second signal terminal SC1. The drain terminal is a drain potential, the source terminal is a source potential, and the first signal terminal GC1 is a gate potential.
[0013]
　The semiconductor element B1 is provided with a drain terminal D2 connected to the main terminal 10AC, a source terminal S2 connected to the main terminal 10N, a third signal terminal GC2, and a fourth signal terminal SC2. The drain terminal is the drain potential, the source terminal is the source potential, and the third signal terminal GC2 is the gate potential.
[0014]
　The semiconductor module 10 is provided with sense source terminals SS1 and SS2 for detecting current. The sense source terminal SS1 is connected to the source terminal of the semiconductor element A1, and the sense source terminal SS2 is connected to the source terminal of the semiconductor element B1. By providing the sense source terminals SS1 and SS2, overcurrent can be detected.
[0015]
　The main terminal 10P is connected to a high potential side DC bus, the main terminal 10N is connected to a low potential side DC bus, and the main terminal 10AC is connected to a load. If the semiconductor element A1 is conductive, the potential of the DC bus on the high potential side is applied to the load. If the semiconductor element B1 is conductive, the potential of the DC bus on the low potential side is applied to the load. As described above, the power conversion device 1 operates as a two-level power conversion device because it outputs two potentials such as the potential of the high potential side DC bus or the potential of the low potential side DC bus. In order to switch the semiconductor element which conducts, the semiconductor module 10 is connected to a control circuit (not shown). In other words, the semiconductor module 10 is connected to a control circuit (not shown) in order to switch the semiconductor element ON / OFF by switching. Specifically, the control circuit is connected to the first signal terminal GC1, the second signal terminal SC1, the third signal terminal GC2, and the fourth signal terminal SC2, and turns on / off the semiconductor element A1 and the semiconductor element B1. Controls OFF. Here, “turning on a semiconductor element” refers to bringing the semiconductor element into a conductive state, and “turning off the semiconductor element” refers to bringing the semiconductor element into a non-conductive state.
[0016]
　In the semiconductor elements A1 and B1, transistor elements and diode elements are connected in parallel. Depending on the characteristics of the load, for example, in the case of a resistive load, the connection of each diode element may be omitted.
[0017]
　1 shows a MOSFET as a transistor element, it is not limited to a MOSFET, and any device can be used as long as it can switch between a low resistance state and a high resistance state by an electrical signal. For example, a transistor element such as an IGBT or a bipolar transistor may be used. When the transistor element is an IGBT, the “drain terminal” becomes the “collector terminal” and the “source terminal” becomes the “emitter terminal”. Further, Si (silicon), SiC (silicon carbide), GaN (gallium nitride), or the like can be used as the material of the transistor elements and diode elements that constitute the semiconductor elements A1 and B1.
[0018]
　FIG. 2 is a plan view of a package containing the semiconductor module 10 used in the power conversion apparatus 1 according to the first embodiment. Although not shown in FIG. 2, a semiconductor element A 1 and a semiconductor element B 1 connected in series are provided inside the package 20.
[0019]
　As shown in FIG. 2, a main terminal 10 P, a main terminal 10 N, and a main terminal 10 AC are provided on one surface side of the package 20. The main terminal 10P is provided at one end with respect to the longitudinal direction of the package 20, and two main terminals 10P are provided in a direction orthogonal to the longitudinal direction. Two main terminals 10N are provided in the direction orthogonal to the longitudinal direction of the package 20 closer to the center of the package 20 than the main terminal 10P. The number of main terminals 10P and main terminals 10N is not limited to two. There may be one main terminal 10P and one main terminal 10N, or three or more. The main terminal 10AC is provided at the other end with respect to the longitudinal direction of the package 20, and three main terminals 10AC are provided in a direction orthogonal to the longitudinal direction. The number of main terminals 10AC is not limited to three. There may be one or two main terminals 10AC, or four or more.
[0020]
　The main terminal 10P constitutes a DC positive terminal P in the semiconductor module 10, the main terminal 10N constitutes a DC negative terminal N in the semiconductor module 10, and the main terminal 10AC constitutes an AC terminal AC in the semiconductor module 10.
[0021]
　The first signal terminal GC1, the second signal terminal SC1, the third signal terminal GC2, the fourth signal terminal SC2, the sense source terminal SS1, and the sense source terminal SS2 are provided between the main terminal 10N and the main terminal 10AC. It has been. In other words, it is provided between the DC terminal and the AC terminal. A second signal terminal SC1, a first signal terminal GC1, and a sense source terminal SS2 are provided along one side in the longitudinal direction of the package 20 from the main terminal 10AC side. A sense source terminal SS1, a third signal terminal GC2, and a fourth signal terminal SC2 are provided along the other side in the longitudinal direction of the package 20 from the main terminal 10AC side.
[0022]
　The first signal terminal GC1, the second signal terminal SC1, the third signal terminal GC2, the fourth signal terminal SC2, the sense source terminal SS1, and the sense source terminal SS2 are connected to a multilayer substrate described later.
[0023]
　FIG. 3 is a plan view of the multilayer substrate used in the power conversion device 1 according to the first embodiment. In FIG. 3, the multilayer substrate 30 is formed of five layers. The layer illustrated in FIG. 3 is the first layer and is a visible layer and is referred to as a surface. The second layer, the third layer, the fourth layer, and the fifth layer are formed in this order from the front surface, and the fifth layer is a visible layer and is referred to as the back surface. Hereinafter, the figures showing the multilayer substrate are those seen from the surface direction.
[0024]
　The first external connection terminal EXT1 and the second external connection terminal EXT2 are mounted on the surface of the multilayer substrate 30. The first external connection terminal EXT1 and the second external connection terminal EXT2 are connected to the control circuit by cable wiring. In FIG. 2, the external connection terminals EXT1 and EXT2 are mounted on the front surface, but may be mounted on the back surface.
[0025]
　As patterns, there are a first signal terminal connection pattern SUB1_GC1, a second signal terminal connection pattern SUB1_SC1, a third signal terminal connection pattern SUB1_GC2, a fourth signal terminal connection pattern SUB1_SC2, and a sense source terminal connection pattern SUB1_SS1 and SUB1_SS2. Is formed.
[0026]
　The first signal terminal connection pattern SUB1_GC1, the second signal terminal connection pattern SUB1_SC1, the third signal terminal connection pattern SUB1_GC2, the fourth signal terminal connection pattern SUB1_SC2, and the sense source terminal connection pattern SUB1_SS1 and SUB1_SS2 are back through holes, respectively. It is electrically connected to the pattern.
[0027]
　The first signal terminal connection pattern SUB1_GC1 is a pattern for connecting to the first signal terminal GC1 of the semiconductor module 10. The second signal terminal connection pattern SUB1_SC1 is a pattern for connecting to the second signal terminal SC1 of the semiconductor module 10. The third signal terminal connection pattern SUB1_GC2 is a pattern for connecting to the third signal terminal GC2 of the semiconductor module 10. The fourth signal terminal connection pattern SUB1_SC2 is a pattern for connecting to the fourth signal terminal SC2 of the semiconductor module 10. The sense source terminal connection pattern SUB1_SS1 is a pattern for connecting to the sense source terminal SS1 of the semiconductor module 10. The sense source terminal connection pattern SUB1_SS2 is a pattern for connecting to the sense source terminal SS2 of the semiconductor module 10.
[0028]
　The first signal terminal connection pattern SUB1_GC1, the second signal terminal connection pattern SUB1_SC1, the third signal terminal connection pattern SUB1_GC2, the fourth signal terminal connection pattern SUB1_SC2, the sense source terminal connection patterns SUB1_SS1 and SUB1_SS2, and the semiconductor module 10 are respectively It is electrically connected by being fastened by a fastening member such as a screw.
[0029]
　FIG. 4 is a diagram illustrating a pattern example of the second layer, the third layer, and the fourth layer of the multilayer substrate 30. In FIG. 4, for easy understanding, the positions of the first external connection terminal EXT1 and the second external connection terminal EXT2 are indicated by a one-dot chain line. In FIG. 4, the conductive member is formed of copper or the like. The insulating member is formed of a glass epoxy resin prepreg or the like. However, it is not limited to these.
[0030]
　FIG. 4A shows the second layer of the multilayer substrate 30, and the first signal terminal GC1 and the third signal terminal GC2 are electrically connected. Specifically, the first signal terminal connection pattern SUB2_GC1 is electrically connected to the first signal terminal GC1, and the third signal terminal connection pattern SUB2_GC2 is electrically connected to the third signal terminal GC2. The The through hole TH2 is a through hole that is electrically connected to another layer. The first signal terminal connection pattern SUB2_GC1 and the third signal terminal connection pattern SUB2_GC2 are not formed in the place where the through hole TH2 is provided. No conductive member is formed between the first signal terminal connection pattern SUB2_GC1 and the third signal terminal connection pattern SUB2_GC2, and an insulating region SUB2_INS is formed. By forming the insulating region SUB2_INS, electrical insulation between the first signal terminal connection pattern SUB2_GC1 and the third signal terminal connection pattern SUB2_GC2 is ensured. The second layer of the multilayer substrate 30 is a layer connected to the gate potential of the semiconductor element A1 and the semiconductor element B1. In other words, the gate potentials of the semiconductor element A1 and the semiconductor element B1 are wired in the same layer.
[0031]
　FIG. 4B shows the third layer of the multilayer substrate 30, and the second signal terminal SC1 and the fourth signal terminal SC2 are electrically connected. Specifically, the second signal terminal connection pattern SUB3_SC1 is electrically connected to the second signal terminal SC1, and the fourth signal terminal connection pattern SUB3_SC2 is electrically connected to the fourth signal terminal SC2. The The through hole TH3 is a through hole that is electrically connected to another layer. The second signal terminal connection pattern SUB2_SC1 and the fourth signal terminal connection pattern SUB2_SC2 are not formed in the place where the through hole TH3 is provided. No conductive member is formed between the second signal terminal connection pattern SUB3_SC1 and the fourth signal terminal connection pattern SUB3_SC2, and an insulating region SUB3_INS is formed. By forming the insulating region SUB3_INS, electrical insulation between the second signal terminal connection pattern SUB3_SC1 and the fourth signal terminal connection pattern SUB3_SC2 is ensured. The third layer of the multilayer substrate 30 is a layer connected to the source potential of the semiconductor element A1 and the semiconductor element B1. In other words, the source potentials of the semiconductor element A1 and the semiconductor element B1 are wired in the same layer.
[0032]
　FIG. 4C shows the fourth layer of the multilayer substrate 30, and the sense source terminal SS1 and the sense source terminal SS2 are electrically connected. Specifically, the sense source terminal connection pattern SUB4_SS1 is electrically connected to the sense source terminal SS1, and the sense source terminal connection pattern SUB4_SS2 is electrically connected to the sense source terminal SS2. The through hole TH4 is a through hole that is electrically connected to another layer. In the place where the through hole TH4 is provided, the sense source terminal connection pattern SUB4_SS1 and the sense source terminal connection pattern SUB4_SS2 are not formed. No conductive member is formed between the sense source terminal connection pattern SUB4_SS1 and the sense source terminal connection pattern SUB4_SS2, and an insulating region SUB4_INS is formed. By forming the insulating region SUB4_INS, electrical insulation between the sense source terminal connection pattern SUB4_SS1 and the sense source terminal connection pattern SUB4_SS2 is ensured. The fourth layer of the multilayer substrate 30 is a layer connected to the sense source potential of the semiconductor element A1 and the semiconductor element B1. In other words, the sense source potentials of the semiconductor element A1 and the semiconductor element B1 are wired in the same layer.
[0033]
　Since the multilayer substrate 30 used in the power conversion device 1 can be formed in the same layer by providing an insulating region, it is not necessary to divide the layer for each signal terminal, and the design is easy.
[0034]
　As can be seen from FIG. 4, the pattern connected to the semiconductor element A1 and the pattern connected to the semiconductor element B1 are formed with the insulating region interposed therebetween. That is, a pattern connected to the semiconductor element A1 is formed along one side in the longitudinal direction of the multilayer substrate 30, and a pattern connected to the semiconductor element B1 along the other side in the longitudinal direction of the multilayer substrate 30. Is formed. By forming in this way, the wiring connected to the semiconductor element A1 and the wiring connected to the semiconductor element B1 do not intersect. Therefore, the semiconductor element A1 is not easily affected by noise from the semiconductor element B1, and the semiconductor element B1 Less susceptible to noise from the semiconductor element A1.
[0035]
　In FIG. 4, the second layer is connected to the gate potential of the semiconductor element, the third layer is connected to the source potential of the semiconductor element, and the fourth layer is connected to the sense source potential of the semiconductor element. However, the present invention is not limited to this. For example, the third layer may be a layer connected to the sense source potential of the semiconductor element, and the fourth layer may be a layer connected to the source potential of the semiconductor element.
[0036]
　However, considering noise, the gate potential layer and the source potential layer are preferably adjacent layers as shown in FIG. When the current path is considered, the current path of the gate potential and the current path of the source potential are in the relationship of the forward path and the return path. In other words, the smaller the distance between the current path of the gate potential and the current path of the source potential, the smaller the loop area formed by the current path of the gate potential and the current path of the source potential, leading to unnecessary signals in the loop. Therefore, it is possible to make the configuration less susceptible to noise.
[0037]
　In FIG. 4, the conductive member having the gate potential and the conductive member having the source potential are formed so as to be opposed to each other in a flat plate shape except for the through hole forming region. By forming in this way, as described above, the distance between the current path of the gate potential and the current path of the source potential can be reduced, and a configuration that is not easily affected by noise can be obtained. In consideration of the length of the wiring connected to the gate potential or the source potential, for example, when the wiring length is desired to be the same, the shape may not be flat. Even in such a case, the conductive member having the gate potential and the conductive member having the source potential form a pattern so that the distance becomes small. For example, a similar pattern is formed when the multilayer substrate is viewed from the surface. Thus, a configuration that is not easily affected by noise can be obtained.
[0038]
　FIG. 5 is a diagram illustrating a main configuration of the power conversion device 1 according to the first embodiment. FIG. 5 is a diagram in which the package 20 in which the semiconductor module 10 is accommodated and the multilayer substrate 30 are connected.
[0039]
　The first signal terminal GC1 is connected to the first signal terminal connection pattern SUB1_GC1 by the fastening member 50GC1. Second signal terminal SC1 is connected to second signal terminal connection pattern SUB1_SC1 by fastening member 50SC1. The third signal terminal GC2 is connected to the third signal terminal connection pattern SUB1_GC2 by the fastening member 50GC2. The fourth signal terminal SC2 is connected to the fourth signal terminal connection pattern SUB1_SC2 by the fastening member 50SC2. The sense source terminal SS1 is connected to the sense source terminal connection pattern SUB1_SS1 by the fastening member 50SS1. The sense source terminal SS2 is connected to the sense source terminal connection pattern SUB1_SS2 by the fastening member 50SS2.
[0040]
　Hereinafter, the fastening member 50GC1, the fastening member 50SC1, the fastening member 50GC2, the fastening member 50SC2, the fastening member 50SS1, and the fastening member 50SS2 may be referred to as the fastening member 50.
[0041]
　The fastening member 50 not only electrically connects each terminal of the package 20 and each connection pattern of the multilayer substrate 30, but also has a function of physically fixing the package 20 and the multilayer substrate 30. The fastening member 50 is a screw, a bolt or the like.
[0042]
　The power converter 1 and the control circuit are connected by the first external connection terminal EXT1 and the second external connection terminal EXT2. For example, the control circuit and the first external connection terminal EXT1 are connected by cable wiring, and the control circuit and the second external connection terminal EXT2 are connected by cable wiring. If it does in this way, it will become possible to connect the power converter device 1 and a control circuit with two cable wiring.
[0043]
　Conventionally, since each signal terminal and sense source terminal are individually connected to the control circuit by cable wiring, six cable wirings are necessary. However, since the power conversion device 1 according to the first embodiment can be connected to the control circuit with two cable wirings, the number of cable wirings can be reduced, and the power conversion device can be downsized. Can do.
[0044]
　Next, operation | movement of the power converter device 1 concerning Embodiment 1 is demonstrated. The main terminal 10P is connected to a high potential side DC bus, the main terminal 10N is connected to a low potential side DC bus, and the main terminal 10AC is connected to a load. The control circuit controls the semiconductor element A1 to be ON by the first signal terminal GC1 and controls the semiconductor element B1 to be OFF by the third signal terminal GC2, so that the semiconductor element A1 becomes conductive and the high-voltage side DC bus. Is applied to the load. In addition, the control circuit controls the semiconductor element A1 to be turned off by the first signal terminal GC1 and controls the semiconductor element B1 to be turned on by the third signal terminal GC2. The potential of the DC bus is applied to the load. As described above, the power conversion device 1 can perform power conversion by switching the potential of the DC bus on the high potential side and the potential of the DC bus on the low potential side.
[0045]
　Although the two-level power conversion device has been described in the first embodiment, the present invention can also be applied to a three-level power conversion device.
[0046]
　The power conversion device 1 according to the first embodiment includes a first main terminal 10P, a second main terminal 10N, and a third main terminal 10AC, and a drain potential or a collector potential is connected to the first main terminal 10P. The gate potential is connected to the first signal terminal GC1, the source potential or the emitter potential is the first semiconductor element A1 connected to the third main terminal 10AC and the second signal terminal SC1, the drain potential or the collector. The potential is connected to the third main terminal 10AC, the gate potential is connected to the third signal terminal GC2, the source potential or the emitter potential is connected to the second main terminal 10N and the fourth signal terminal SC2, and the first The semiconductor module 10 having the second semiconductor element B1 connected in series with the semiconductor element A1 and the first wiring SUB2 connected to the first signal terminal GC1. GC1, the second wiring SUB3_SC1 connected to the second signal terminal SC1, the fourth wiring connected to the third wiring SUB2_GC2 connected to the third signal terminal GC2, and the fourth signal terminal SC2. SUB3_SC2, a first external connection terminal EXT1 to which the first wiring SUB2_GC1 and the second wiring SUB3_SC1 are connected, and a second external to which the third wiring SUB2_GC2 and the fourth wiring SUB3_SC2 are connected The first wiring SUB2_GC1 and the third wiring SUB2_GC2 are formed in the first layer with the insulating region SUB2_INS interposed therebetween, and the second wiring SUB3_SC1 and the fourth wiring SUB3_SC2 are in the insulating region SUB3_INS. And a multilayer substrate 30 formed in the second layer across the substrate. , It is possible to reduce the number of cabling to be connected to the control circuit, the power conversion apparatus 1 can be miniaturized.
[0047]
　In the power conversion device 1 according to the first embodiment, the multilayer substrate 30 is arranged between the first main terminal 10P or the second main terminal 10N and the third main terminal 10AC, so that the control circuit The number of cable wirings to be connected to can be reduced, and the power conversion device 1 can be reduced in size.
[0048]
　In the power conversion device 1 according to the first embodiment, the first wiring SUB2_GC1 and the second wiring SUB3_SC1 of the multilayer substrate 30 are formed adjacent to each other, and the third wiring SUB2_GC2 and the fourth wiring SUB3_SC2 are formed adjacent to each other. By doing so, it is possible to obtain a configuration that is not easily affected by noise.
[0049]
　Second Embodiment
　FIG. 6 is a diagram illustrating a power conversion device 2 according to a second embodiment. The second embodiment is different from the first embodiment in that a plurality of packages and a plurality of external connection terminals are provided.
[0050]
　In FIG. 6, packages 20U, 20V and 20W are provided. In addition, external connection terminals U_EXT1, U_EXT2, V_EXT1, V_EXT2, W_EXT1, and W_EXT2 are provided. A multilayer substrate 60 is provided.
[0051]
　The package 20U accommodates a semiconductor module 10U having a U-phase function in the power conversion circuit. The package 20V accommodates a semiconductor module 10V having a V-phase function in the power conversion circuit. The package 20W houses a semiconductor module 10W having a W-phase function in the power conversion circuit. The basic configuration of packages 20U, 20V, and 20W is the same as that of package 20 in the first embodiment. The basic configuration of semiconductor modules 10U, 10V, and 10W is the same as that of semiconductor module 10 in the first embodiment.
[0052]
　As in the first embodiment, the packages 20U, 20V, and 20W are electrically connected to the multilayer substrate 60 by the fastening members 50. The packages 20U, 20V, and 20W are arranged in parallel, and are physically fixed to the multilayer substrate 60 by the fastening member 50. In other words, the semiconductor modules 10U, 10V, and 10W are arranged in parallel. Here, “arranged in parallel” means that the main terminal 10P, the main terminal 10N, and the main terminal 10AC of each semiconductor module are arranged adjacent to each other. In addition, since the package has a substantially rectangular shape, when the longitudinal sides of the packages in which the semiconductor modules are accommodated are arranged in parallel, they are also referred to as “arranged in parallel”.
[0053]
　The external connection terminals U_EXT1 and U_EXT2 are external connection terminals that are electrically connected to the package 20U. External connection terminals V_EXT1 and V_EXT2 are external connection terminals that are electrically connected to the package 20V. External connection terminals W_EXT1 and W_EXT2 are external connection terminals that are electrically connected to the package 20W. The external connection terminals U_EXT1, U_EXT2, V_EXT1, V_EXT2, W_EXT1, and W_EXT2 are mounted on the multilayer substrate 60. The configuration of the external connection terminals is the same as that of external connection terminals EXT1 and EXT2 in the first embodiment.
[0054]
　FIG. 7 is a diagram illustrating a pattern example of the second layer of the multilayer substrate 60. FIG. 7 shows the second layer of the multilayer substrate 60, in which the first signal terminal UGC1 and the third signal terminal UGC2 of the package 20U are electrically connected, and the first signal terminal VGC1 and the third signal terminal VGC1 of the package 20V are connected. The signal terminal VGC2 is electrically connected, and the first signal terminal WGC1 and the third signal terminal WGC2 of the package 20W are electrically connected. Specifically, the first signal terminal connection pattern SUB2_UGC1 is electrically connected to the first signal terminal UGC1, and the third signal terminal connection pattern SUB2_UGC2 is electrically connected to the third signal terminal UGC2. The The first signal terminal connection pattern SUB2_VGC1 is electrically connected to the first signal terminal VGC1, and the third signal terminal connection pattern SUB2_VGC2 is electrically connected to the third signal terminal VGC2. The first signal terminal connection pattern SUB2_WGC1 is electrically connected to the first signal terminal WGC1, and the third signal terminal connection pattern SUB2_WGC2 is electrically connected to the third signal terminal WGC2.
[0055]
　Between the first signal terminal connection pattern SUB2_UGC1 and the third signal terminal connection pattern SUB2_UGC2, between SUB2_VGC1 and the third signal terminal connection pattern SUB2_VGC2, and between SUB2_WGC1 and the third signal terminal connection pattern SUB2_WGC2. The conductive member is not formed, and the insulating region SUB2_INS is formed. By forming the insulating region SUB2_INS, electrical insulation between the first signal terminal connection pattern and the third signal terminal connection pattern is ensured.
[0056]
　Conductive members are not formed between the first signal terminal connection pattern SUB2_UGC1 and the first signal terminal connection pattern SUB2_VGC1, and between the first signal terminal connection pattern SUB2_VGC1 and the first signal terminal connection pattern SUB2_WGC1. First, the insulating region SUB2_INS is formed. By forming the insulating region SUB2_INS, electrical insulation between the U-phase first signal terminal connection pattern and the V-phase first signal terminal connection pattern is ensured, and the V-phase first signal terminal connection is ensured. Electrical insulation between the pattern and the W-phase first signal terminal connection pattern is ensured.
[0057]
　Similarly, conductive members are formed between the third signal terminal connection pattern SUB2_UGC2 and the third signal terminal connection pattern SUB2_VGC2, and between the third signal terminal connection pattern SUB2_VGC2 and the third signal terminal connection pattern SUB2_WGC2. Insulating region SUB2_INS is formed. By forming the insulating region SUB2_INS, electrical insulation between the U-phase third signal terminal connection pattern and the V-phase third signal terminal connection pattern is ensured, and the V-phase third signal terminal connection is ensured. Electrical insulation between the pattern and the W-phase third signal terminal connection pattern is ensured.
[0058]
　The third layer and the fourth layer (not shown) of the multilayer substrate 60 are also electrically insulated from the U phase, the V phase, and the W phase as in the second layer shown in FIG.
[0059]
　Since the multilayer substrate 60 used in the power conversion device 2 can be formed in the same layer by providing an insulating region, it is not necessary to divide the layer for each signal terminal, and the design is easy. Further, even when there are a plurality of semiconductor modules, it is not necessary to increase the number of layers of the multilayer substrate 60, so that the design is facilitated. Moreover, since it is not necessary to increase the number of layers of the multilayer substrate 60, there is an effect of suppressing cost.
[0060]
　As shown in FIG. 6, in the power conversion device 2 according to the second embodiment, semiconductor modules 10U, 10V, and 10W are arranged in parallel and connected by a multilayer substrate 60. Conventionally, since the signal terminal and the sense source terminal of each semiconductor module are individually connected to the control circuit by cable wiring, six cable wirings are required for each semiconductor module. Further, when there are semiconductor modules for three phases, such as a three-phase two-level inverter circuit, 18 cable wirings are required. However, in the case of the power conversion device 2 according to the second embodiment, it is sufficient if there are as many cable wirings as the number of external connection terminals. That is, since it can connect with a control circuit with six cable wiring, the number of cable wiring can be reduced and a power converter device can be reduced in size.
[0061]
　Next, operation | movement of the power converter device 2 concerning Embodiment 2 is demonstrated. The control circuit controls the semiconductor module 10U by the first signal terminal GC1 and the third signal terminal GC2 of the semiconductor module 10U. Further, the semiconductor module 10V is controlled by the first signal terminal GC1 and the third signal terminal GC2 of the semiconductor module 10V. Further, the semiconductor module 10W is controlled by the first signal terminal GC1 and the third signal terminal GC2 of the semiconductor module 10W. The control circuit can control the three phases of the U phase, the V phase, and the W phase by controlling the semiconductor modules 10U, 10V, and 10W by shifting the phases by 120 degrees.
[0062]
　The power conversion device 2 according to the second embodiment includes a plurality of semiconductor modules, and the first main terminal 10P, the second main terminal 10N, and the third main terminal of the first semiconductor module and the second semiconductor module. By arranging 10AC in parallel so as to be adjacent to each other, the number of cable wirings connected to the control circuit can be reduced, and the power converter can be downsized.
[0063]
　Third Embodiment
　FIG. 8 is a diagram illustrating a power conversion device 3 according to a third embodiment. In FIG. 8, packages 20U-1 and 20U-2 are provided in parallel. Further, external connection terminals U_EXT1 and U_EXT2 are provided. A multilayer substrate 80 is provided. Packages 20U-1 and 20U-2 house semiconductor modules 10U-1 and 10U-2 having a U-phase function in the power conversion circuit. That is, the semiconductor modules 10U-1 and 10U-2 are provided in parallel. The basic configuration of packages 20U-1 and 20U-2 is the same as that of package 20 in the first embodiment. The basic configuration of semiconductor modules 10U-1 and 10U-2 is the same as that of semiconductor module 10 in the first embodiment.
[0064]
　In FIG. 8, external connection terminals U_EXT1 and U_EXT2 are provided between packages 20U-1 and 20U-2 provided in parallel, and the external connection terminals U_EXT1 and U_EXT2 are mounted on the multilayer substrate 80. Further, the packages 20U-1 and 20U-2 provided in parallel are electrically connected to the multilayer substrate 80 by a fastening member 50. The packages 20U-1 and 20U-2 are arranged in parallel, and are physically fixed to the multilayer substrate 80 by the fastening member 50.
[0065]
　FIG. 9 is a diagram illustrating a pattern example of the second layer of the multilayer substrate 80. FIG. 9 shows the second layer of the multilayer substrate 80, and the first signal terminal UGC1 and the third signal terminal UGC2 of the packages 20U-1 and 20U-2 are electrically connected. Specifically, the first signal terminal connection pattern SUB2_UGC1 is electrically connected to the first signal terminal UGC1, and the third signal terminal connection pattern SUB2_UGC2 is electrically connected to the third signal terminal UGC2. The
[0066]
　No conductive member is formed between the first signal terminal connection pattern SUB2_UGC1 and the third signal terminal connection pattern SUB2_UGC2, and an insulating region SUB2_INS is formed. By forming the insulating region SUB2_INS, electrical insulation between the first signal terminal connection pattern and the third signal terminal connection pattern is ensured.
[0067]
　The first signal terminal UGC1 of the package 20U-1 and the first signal terminal UGC1 of the package 20U-2 arranged in parallel have the same potential by being connected to the second layer of the multilayer substrate 80. Similarly, the third signal terminals UGC2 of the packages 20U-1 and 20U-2 arranged in parallel have the same potential by being connected to the second layer of the multilayer substrate 80. Similarly to the second layer shown in FIG. 9, the third layer and the fourth layer (not shown) of the multilayer substrate 80 are connected to the packages 20U-1 and 20U-2 arranged in parallel, and each layer has the same potential.
[0068]
　In other words, the first signal terminal UGC1 of the semiconductor module 10U-1 and the first signal terminal UGC1 of the semiconductor module 10U-2 have the same potential by being connected to the second layer of the multilayer substrate 80. Similarly, the third signal terminals UGC2 of the semiconductor modules 10U-1 and 10U-2 arranged in parallel have the same potential by being connected to the second layer of the multilayer substrate 80. Similarly to the second layer shown in FIG. 9, the third layer and the fourth layer (not shown) of the multilayer substrate 80 are connected to the semiconductor modules 10U-1 and 20U-2 and have the same potential in each layer.
[0069]
　For the sense source terminals SS1 and SS2, it is only necessary that either of the semiconductor modules 10U-1 or 10U-2 is connected to the multilayer substrate.
[0070]
　In FIG. 8, by providing the external connection terminal U_EXT1 between the packages 20U-1 and 20U-2 arranged in parallel, the first signal terminal and the external connection terminal U_EXT1 of the package 20U-1 arranged in parallel And the wiring distance between the first signal terminal of the package 20U-2 and the external connection terminal U_EXT1 can be reduced. The same applies to the second signal terminals of the packages 20U-1 and 20U-2. Further, by providing the external connection terminal U_EXT2 between the packages 20U-1 and 20U-2 arranged in parallel, wiring between the third signal terminal of the package 20U-1 arranged in parallel and the external connection terminal U_EXT2 The difference between the distance and the wiring distance between the third signal terminal of the package 20U-2 and the external connection terminal U_EXT2 can be reduced. The same applies to the fourth signal terminals of the packages 20U-1 and 20U-2.
[0071]
　As shown in FIG. 8, in the power conversion device 3 according to the third embodiment, packages 20U-1 and 20U-2 are arranged in parallel and connected to the multilayer substrate 80. Conventionally, since the signal terminal and the sense source terminal of each semiconductor module are individually connected to the control circuit by cable wiring, six cable wirings are required for each semiconductor module. Furthermore, when two in-phase semiconductor modules are arranged, twelve cable wirings are required. However, in the case of the power conversion device 3 according to the third embodiment, it is sufficient if there are as many cable wirings as the number of external connection terminals. That is, since it can connect with a control circuit with two cable wiring, the number of cable wiring can be reduced and a power converter device can be reduced in size.
[0072]
　Conventionally, when wiring to a terminal having the same potential, the wiring length varies because it is connected to the control circuit by cable wiring. The problem that the wiring length varies will be described below.
[0073]
　For example, consider a case where the U-phase upper arm is controlled by the semiconductor element A1 of the upper arm of the semiconductor module 10U-1 and the semiconductor element A2 of the upper arm of the semiconductor module 10U-2. Since the semiconductor element A1 and the semiconductor element A2 constitute the same U-phase upper arm, they have the same function. The control circuit controls the semiconductor element A1 and the semiconductor element A2 at the same timing. However, even if signals are output from the control circuit at the same timing, if the wiring length of the control circuit and the semiconductor device A1 and the wiring length of the control circuit and the semiconductor device A2 are different, the semiconductor device A1 In addition, there is a time difference between signals input to the control terminals of the semiconductor element A2. Due to the time difference, the ON / OFF timing of the semiconductor element A1 and the semiconductor element A2 is shifted. By shifting the ON / OFF timing of the semiconductor element A1 and the semiconductor element A2, for example, a large amount of current flows through the semiconductor element that is turned ON earlier, and heat generation increases. There is a problem that one of the semiconductor elements is likely to deteriorate due to the increase in heat generation.
[0074]
　However, in the case of the power conversion device 3 according to the third embodiment, when wiring to a terminal having the same potential, the cable wiring connected to the control circuit is common, and therefore the wiring length does not vary due to the cable wiring. Since there is no variation in wiring length due to cable wiring, there is an effect of preventing the problem that one semiconductor element is likely to deteriorate.
[0075]
　FIG. 10 is a circuit diagram illustrating a main configuration of the power conversion device 3 according to the third embodiment. In FIG. 10, the first signal terminal GC1 of the semiconductor module 10U-1 is connected to the first signal terminal GC1 and the external connection terminal U_EXT1 of the semiconductor module 10U-2. The second signal terminal SC1 of the semiconductor module 10U-1 is connected to the second signal terminal SC1 and the external connection terminal U_EXT1 of the semiconductor module 10U-2. The third signal terminal GC2 of the semiconductor module 10U-1 is connected to the third signal terminal GC2 and the external connection terminal U_EXT2 of the semiconductor module 10U-2. The fourth signal terminal SC2 of the semiconductor module 10U-1 is connected to the fourth signal terminal SC2 and the external connection terminal U_EXT2 of the semiconductor module 10U-2.
[0076]
　By connecting the first signal terminal GC1 of the semiconductor module 10U-1, the first signal terminal GC1 of the semiconductor module 10U-2, and the external connection terminal U_EXT1, the control circuit can control the semiconductor modules 10U-1 and 10U-2. Can be controlled at the same timing.
[0077]
　Although the semiconductor module having the U-phase function has been described in the third embodiment, the same configuration can be applied to the V-phase and the W-phase. In the third embodiment, the case where two semiconductor modules are arranged in parallel has been described. However, three or more semiconductor modules may be arranged in parallel.
[0078]
　Since the multilayer substrate 80 used in the power conversion device 3 can be formed in the same layer by providing an insulating region, it is not necessary to divide the layer for each signal terminal, and the design is easy. Further, even when there are a plurality of semiconductor modules, it is not necessary to increase the number of layers of the multilayer substrate 80, so that the design is facilitated. Moreover, since it is not necessary to increase the number of layers of the multilayer substrate 80, there is an effect of suppressing the cost.
[0079]
　The power conversion device 3 according to the third embodiment can reduce the number of cable wirings connected to the control circuit because the first semiconductor module and the second semiconductor module arranged in parallel are in the same phase. The power converter can be downsized.
[0080]
　In the power conversion device 3 according to the third embodiment, the first signal terminals of the first semiconductor module and the second semiconductor module have the same potential, and the second signal terminals of the first semiconductor module and the second semiconductor module Are the same potential, the third signal terminals of the first semiconductor module and the second semiconductor module are the same potential, and the fourth signal terminals of the first semiconductor module and the second semiconductor module are the same potential. Thus, the number of cable wirings connected to the control circuit can be reduced, and the power conversion device can be reduced in size.
[0081]
　In the power conversion device 3 according to the third embodiment, the first external connection terminal and the second external connection terminal are arranged between the first semiconductor module and the second semiconductor module arranged in parallel. Thus, the difference between the wiring distance between the first semiconductor module and the first external connection terminal and the wiring distance between the second semiconductor module and the first external connection terminal can be reduced. The difference between the wiring distance between the semiconductor module and the second external connection terminal and the wiring distance between the second semiconductor module and the second external connection terminal can be reduced.
[0082]
　Fourth Embodiment
　FIG. 11 is a diagram illustrating a power conversion device 4 according to a fourth embodiment. In the fourth embodiment, choke coils RFC1 to RFC4 are provided in the configuration of the third embodiment. In FIG. 11, packages 20U-1 and 20U-2 are provided in parallel. Further, external connection terminals U_EXT1 and U_EXT2 are provided. A multilayer substrate 90 is provided. Packages 20U-1 and 20U-2 house semiconductor modules 10U-1 and 10U-2 having a U-phase function in the power conversion circuit. That is, the semiconductor modules 10U-1 and 10U-2 are provided in parallel. The basic configuration of packages 20U-1 and 20U-2 is the same as that of package 20 in the first embodiment. The basic configuration of semiconductor module 10U-1 and semiconductor module 10U-2 is the same as that of semiconductor module 10 in the first embodiment.
[0083]
　In FIG. 11, packages 20 U- 1 and 20 U- 2 provided in parallel are electrically connected to the multilayer substrate 90 by a fastening member 50. The packages 20U-1 and 20U-2 are arranged in parallel, and are physically fixed to the multilayer substrate 90 by the fastening member 50.
[0084]
　The choke coils RFC1 to RFC4 are mounted on the multilayer substrate 90 and have a function of suppressing high-frequency current such as common mode noise. When the choke coils RFC1 to RFC4 are not distinguished, they may be referred to as choke coils RFC.
[0085]
　The choke coils RFC1 to RFC4 have, for example, a structure in which two conductors are wound around one core and four terminals. The winding directions of the two conducting wires are opposite to each other, and acts as an inductor for common mode noise of high frequency current, and has a function of suppressing high frequency current by increasing the resistance.
[0086]
　The first terminal of the choke coil RFC1 is connected to the first signal terminal of the package 20U-1, the second terminal of the choke coil RFC1 is connected to the second signal terminal of the package 20U-1, and the third terminal of the choke coil RFC1. The terminal and the fourth terminal are connected to the external connection terminal U_EXT1.
[0087]
　The first terminal of the choke coil RFC2 is connected to the third signal terminal of the package 20U-1, the second terminal of the choke coil RFC2 is connected to the fourth signal terminal of the package 20U-1, and the third terminal of the choke coil RFC2 is connected. The terminal and the fourth terminal are connected to the external connection terminal U_EXT2.
[0088]
　The first terminal of the choke coil RFC3 is connected to the first signal terminal of the package 20U-2, the second terminal of the choke coil RFC3 is connected to the second signal terminal of the package 20U-2, and the third terminal of the choke coil RFC3 is connected. The terminal and the fourth terminal are connected to the external connection terminal U_EXT1.
[0089]
　The first terminal of the choke coil RFC4 is connected to the third signal terminal of the package 20U-2, the second terminal of the choke coil RFC4 is connected to the fourth signal terminal of the package 20U-2, and the third terminal of the choke coil RFC4. The terminal and the fourth terminal are connected to the external connection terminal U_EXT2.
[0090]
　FIG. 12 is a circuit diagram illustrating a main configuration of the power conversion device 4 according to the fourth embodiment. In FIG. 12, the first to fourth signal terminals of the semiconductor modules 10U-1 and 10U-2 and the choke coils RFC1 to RFC4 are connected.
[0091]
　In FIG. 12, the first terminal of the choke coil RFC1 is connected to the first signal terminal of the semiconductor module 10U-1, the second terminal of the choke coil RFC1 is connected to the second signal terminal of the semiconductor module 10U-1, The third terminal of the choke coil RFC1 is connected to the third terminal of the choke coil RFC3 and the external connection terminal U_EXT1. The fourth terminal of the choke coil RFC1 is connected to the fourth terminal of the choke coil RFC3 and the external connection terminal U_EXT1.
[0092]
　The first terminal of the choke coil RFC2 is connected to the third signal terminal of the semiconductor module 10U-1, the second terminal of the choke coil RFC2 is connected to the fourth signal terminal of the semiconductor module 10U-1, and the choke coil RFC2 The third terminal is connected to the third terminal of the choke coil RFC4 and the external connection terminal U_EXT2. The fourth terminal of the choke coil RFC2 is connected to the fourth terminal of the choke coil RFC4 and the external connection terminal U_EXT2.
[0093]
　The first terminal of the choke coil RFC3 is connected to the first signal terminal of the semiconductor module 10U-2, the second terminal of the choke coil RFC3 is connected to the second signal terminal of the semiconductor module 10U-2, and the choke coil RFC3 The third terminal is connected to the third terminal of the choke coil RFC1 and the external connection terminal U_EXT1. The fourth terminal of the choke coil RFC3 is connected to the fourth terminal of the choke coil RFC1 and the external connection terminal U_EXT1.
[0094]
　The first terminal of the choke coil RFC4 is connected to the third signal terminal of the semiconductor module 10U-2, the second terminal of the choke coil RFC4 is connected to the fourth signal terminal of the semiconductor module 10U-2, and the choke coil RFC4 The third terminal is connected to the third terminal of the choke coil RFC2 and the external connection terminal U_EXT2. The fourth terminal of the choke coil RFC4 is connected to the fourth terminal of the choke coil RFC2 and the external connection terminal U_EXT2.
[0095]
　As described above, by connecting the first to fourth signal terminals and the choke coils RFC1 to RFC4, it is possible to suppress an oscillating current described later.
[0096]
　In a semiconductor module connected in parallel, when switching the semiconductor module, specifically, when switching ON / OFF, an inter-parallel oscillating current may occur. Since the gate potential (between the source potentials) connected in parallel is the same potential and low resistance, an oscillation current between the parallel potentials is likely to occur, and switching of the semiconductor module may be caused to malfunction.
[0097]
　FIG. 13 is a diagram illustrating an example of the parallel oscillating current. FIG. 13 is a diagram showing an oscillating current generated when the transistor of the semiconductor module is turned on, where the vertical axis represents the drain current Id and the horizontal axis represents the time Time. That is, it is a diagram showing a time change of the drain current flowing in the transistor of the semiconductor module. After the transistor is turned on, a short cycle current, that is, a high frequency current may flow in a portion surrounded by a broken line, which is an oscillating current.
[0098]
　The power conversion device 4 according to the fourth embodiment has a configuration in which choke coils RFC1 to RFC4 are provided at first to fourth signal terminals. Since the choke coils RFC1 to RFC4 function as a high resistance against high-frequency currents, the high-frequency currents are prevented from being input to the first to fourth signal terminals. In other words, the oscillating current can be suppressed by providing the choke coils RFC1 to RFC4 at the input portions of the first to fourth signal terminals.
[0099]
　The place where the choke coil RFC is provided may be between the external connection terminal and the semiconductor element. Further, it may be provided on either the upper arm or the lower arm. However, in order to efficiently suppress the oscillating current, it is preferable to provide a choke coil RFC at the signal terminal of each semiconductor element as shown in FIG. The place where the choke coil RFC is provided is preferably close to the signal terminal of each semiconductor element.
[0100]
　Although the semiconductor module having the U-phase function has been described in the fourth embodiment, the V-phase and the W-phase can be configured similarly. In the fourth embodiment, the choke coil has been described as an example, but a common mode filter or the like may be used.
[0101]
　The power conversion device 4 according to the fourth embodiment has first to fourth terminals, the first terminal and the second terminal are connected to the first semiconductor element A1 or the second semiconductor element B1, and the third terminal and The fourth terminal is input to the first semiconductor element A1 or the second semiconductor element B1 by providing the multilayer substrate 90 with a choke coil RFC connected to the first external connection terminal or the second external connection terminal. Oscillating current can be suppressed.
[0102]
　In the power conversion device 4 according to the fourth embodiment, the first terminal is connected to the first signal terminal, the second terminal is connected to the second signal terminal, and the third terminal and the fourth terminal are the first external terminals. The first choke coil connected to the connection terminal, the first terminal is connected to the third signal terminal, the second terminal is connected to the fourth signal terminal, and the third terminal and the fourth terminal are the second signal terminal. By providing the multilayer substrate 90 with the second choke coil connected to the external connection terminal, it is possible to suppress the oscillating current input to the semiconductor element A1 and the semiconductor element B1 constituting the semiconductor module.
[0103]
　The power conversion device 4 according to the fourth embodiment includes a first semiconductor module and a second semiconductor module, the first terminal is connected to the first signal terminal of the first semiconductor module, and the second terminal is A third choke coil connected to the second signal terminal of the first semiconductor module, the third terminal and the fourth terminal connected to the first external connection terminal, and the first terminal of the second semiconductor module A fourth choke connected to the first signal terminal, the second terminal connected to the second signal terminal of the second semiconductor module, and the third terminal and the fourth terminal connected to the first external connection terminal By providing the coil on the multilayer substrate 90, the oscillating current input to the semiconductor element A1 constituting the upper arms of the semiconductor modules 10U-1 and 10U-2 can be suppressed.
[0104]
　The power conversion device 4 according to the fourth embodiment includes a first semiconductor module and a second semiconductor module, the first terminal is connected to the third signal terminal of the first semiconductor module, and the second terminal is A fifth choke coil connected to the fourth signal terminal of the first semiconductor module, the third terminal and the fourth terminal connected to the second external connection terminal, and the first terminal of the second semiconductor module A sixth choke connected to the third signal terminal, the second terminal connected to the fourth signal terminal of the second semiconductor module, and the third terminal and the fourth terminal connected to the second external connection terminal By providing the coil on the multilayer substrate 90, the oscillating current input to the semiconductor element B1 constituting the lower arm of the semiconductor modules 10U-1 and 10U-2 can be suppressed.
[0105]
　Note that the present invention can be freely combined with each other within the scope of the invention, and the embodiments can be appropriately modified or omitted.
Explanation of symbols
[0106]
1
, 2, 3, 4 Power conversion device D1, D2 Drain terminal
S1, S2 Source terminal
GC1, GC2 Gate control terminal
SC1, SC2 Source control terminal
SS1, SS2 Sense source terminal
A1 First semiconductor element
B1 Second semiconductor element
10P First main terminal
10N Second main terminal
10AC Third main terminals
10, 10U, 10U-1, 10U-2, 10V, 10W Semiconductor modules
20, 20U, 20U-1, 20U-2, 20V, 20W package
30,60,80,90 multilayer substrate
EXT1, EXT2, U_EXT1, U_EXT2, V_EXT1, V_EXT2, W_EXT1, W_EXT2 external connection terminal
SUB1_GC1, SUB1_GC2, SUB1_SC1, SUB1_SC2, SUB1_SS1, SUB1_S 2, SUB2_GC1, SUB2_GC2, SUB3_SC1, SUB3_SC2, SUB4_SS1, SUB4_SS2, SUB2_UGC1, SUB2_UGC2, SUB2_VGC1, SUB2_VGC2, SUB2_WGC1, SUB2_WGC2 signal terminal connection patterns
50
, 50GC1, 50GC2, 50SC1, 50SC2, 50SS1, 50SS2 Fastening member SUB2_INS, SUB3_INS, SUB4_INS Insulation region
RFC1, RFC2, RFC3, RFC4 Choke coil
TH2, TH3, TH4 Through hole
The scope of the claims
[Claim 1]
　A first main terminal, a second main terminal, and a third main terminal; a drain potential or a collector potential is connected to the first main terminal; a gate potential is connected to the first signal terminal; The potential or emitter potential is connected to the third main terminal and the second signal terminal, the drain potential or collector potential is connected to the third main terminal, and the gate potential is set to the third signal. A semiconductor module having a second semiconductor element connected to the terminal and having a source potential or emitter potential connected to the second main terminal and the fourth signal terminal and connected in series with the first semiconductor element; A
　first wiring connected to the first signal terminal; a second wiring connected to the second signal terminal; a third wiring connected to the third signal terminal; 4 connected to 4 signal terminals A first external connection terminal to which the first wiring and the second wiring are connected, and a second external connection to which the third wiring and the fourth wiring are connected. And the first wiring and the third wiring are formed in a first layer with an insulating region in between, and the second wiring and the fourth wiring are in the first layer with the insulating region in between. And a multilayer substrate formed in two layers
　.
[Claim 2]

The power conversion device according to claim 3, 　wherein the first semiconductor module and the second semiconductor module arranged in parallel are in the same phase .
[Claim 5]
　The first signal terminals of the first semiconductor module and the second semiconductor module have the same potential, the second signal terminals of the first semiconductor module and the second semiconductor module have the same potential, 5. The
power conversion according to claim 4 , wherein a third signal terminal of the semiconductor module and the second semiconductor module has the same potential, and a fourth signal terminal of the first semiconductor module and the second semiconductor module has the same potential. apparatus.
[Claim 6]
　The said 1st external connection terminal and the said 2nd external connection terminal are
any one of Claim 3 to 5 arrange | positioned between the said 1st semiconductor module and 2nd semiconductor module which are arrange | positioned in parallel. The power converter according to item.
[Claim 7]
　The first terminal and the second terminal are connected to the first semiconductor element or the second semiconductor element, and the third terminal and the fourth terminal are the first external connection terminal or
The power conversion device according to any one of claims 1 to 6 , further comprising a choke coil connected to the second external connection terminal on the multilayer substrate .
[Claim 8]
　The first terminal is connected to the first signal terminal, the second terminal is connected to the second signal terminal, and the third terminal and the fourth terminal are connected to the first external connection terminal. The choke coil,
　the first terminal is connected to the third signal terminal, the second terminal is connected to the fourth signal terminal, and the third terminal and the fourth terminal are connected to the second external connection terminal.
　The power converter according to claim 7 , further comprising: a second choke coil that is provided on the multilayer substrate .
[Claim 9]
　The first semiconductor module and the second semiconductor module have a
　first terminal connected to a first signal terminal of the first semiconductor module, and a second terminal connected to a second signal of the first semiconductor module. The third terminal and the fourth terminal are connected to the signal terminal, the third terminal is connected to the first external connection terminal, and
　the first terminal is connected to the first signal terminal of the second semiconductor module. The second terminal is connected to the second signal terminal of the second semiconductor module, and the third terminal and the fourth terminal are connected to the first external connection terminal.
　The power conversion device according to claim 7, which is provided in the multilayer substrate .
[Claim 10]
　The first and second semiconductor modules have a
　first terminal connected to a third signal terminal of the first semiconductor module, and a second terminal connected to a fourth signal of the first semiconductor module. The third terminal and the fourth terminal are connected to the second external connection terminal, the third choke coil is connected to
　the signal terminal, and the first terminal is connected to the third signal terminal of the second semiconductor module. A second choke coil connected to the fourth signal terminal of the second semiconductor module, a third terminal and a fourth terminal connected to the second external connection terminal, and
　The power conversion device according to claim 7 or 9 , comprising a multilayer substrate .
[Claim 11]
　The first wiring and the second wiring of the multilayer substrate are formed adjacent to each other, and the third wiring and the fourth wiring are formed adjacent to
　each other. The power converter described in the paragraph.