The title of the invention: connectors and power power supply system
Technical field
[0001]
　The present invention relates to a connector and power power supply system.
BACKGROUND
[0002]
　Currently, in the ac distribution of 100V, which is used in the home, the input is a voltage source of low impedance, and is distributed to parallel by using a conductor pair of power from the voltage source. The AC power distribution system is a very natural when power is a voltage source for the load is supplied with a constant voltage, the power value is determined by the current of the load.
[0003]
　On the other hand, the equipment and devices currently used, rather than being driven by a voltage, there is the person that is driven by a current suitable. Typical of what is better to be driven by a current is suitable LED; a (Light Emitting Diode). LED in order is as diode its name, is a constant voltage element. Therefore, LED amount of power control (ie brightness control) is carried out by the current increase or decrease rather than the terminal voltage. In addition, the practical application of white LED, LED lighting will continue to expand the applications in the future. Such LED lighting and to connect the current of the AC constant-voltage system, a constant current drive is performed after the AC / DC conversion is performed in the interior of the device.
[0004]
　In addition, current, power transmission and distribution by the DC has been reviewed (see, for example, for example, Patent Documents 1 and 2). Do not mention the advantages such as the DC distribution is here, DC distribution for the reasons mentioned above it is clear that is suitable for LED lighting for example.
[0005]
　Therefore, a current-fed power distribution system for DC distribution include, but are not be necessarily valid for all electrical equipment, for some current-driven devices, a current-fed power distribution system can be effective. In a current-fed power distribution system, the current source and the load are connected in series in principle, set by the current constant, the (source of) the voltage is changed by the number of loads and load is appropriately their terminal voltages it is a form of performing power increase and decrease of by.
CITATION
Patent literature
[0006]
Patent Document 1: Patent Publication No. 2001-306191
Patent Document 2: JP 2008-123051 JP
Summary of the invention
Problems that the Invention is to Solve
[0007]
　Current-fed power distribution system, since it is considered a dual voltage supply type power distribution system for AC power distribution, when compared in some respects is as follows.
[0008]
　First, the power source is a voltage source with a voltage-fed power distribution system is a current source with a current-fed power distribution system. Parameter to a fixed value, while the voltage-fed power distribution system is a voltage and a current in a current-fed power distribution system. Connection of the load is a voltage-fed power distribution system is a parallel connection, a current-fed power distribution system is connected in series. Then, the connector electrodes, although a voltage-fed power distribution system is always open to a voltage, a current-fed power distribution system should be always closed with respect to the current and to put the instrument switches to the voltage supply a type power distribution system and to open the switch, but it is necessary to close the switch in the current-fed power distribution system.
[0009]
　Thus, there is a difference in the voltage-fed power distribution system and a current-fed power distribution system has a problem that it is impossible to receive the supply of electric power by a connector that is used in the existing voltage-fed power distribution system.
[0010]
　The present invention has been made in view of the above problems, it is an object of the present invention receives power from the power source by connecting the load together in series, new and improved power feeding system, and adapted for use in the power feed system is to provide a new and improved connector.
Means for Solving the Problems
[0011]
　In order to solve the above problems, according to an aspect of the present invention, disposed in series with a current source, comprising a connecting portion in which the plug is detachably connected, the connecting portion, from the current source is connected to a conductive wire for passing current, when the plug in the connecting portion is not connected by being mutually contacted to short-circuit the current from the current source, the contact with each other when the plug is connected to the connecting portion is the short-circuit release by being released current flows from said current source to said plug, to the from the plug connection the connecting portion is released by being mutually contacted again by short-circuit current from the current source first It includes 1 of the terminal and a second terminal and the connector is provided.
[0012]
　The connector prevents the desorption of the plug when the plug to the connection portion is connected, said first terminal and said second terminal when the connection of the plug is released from said connecting portion and it may further comprise a contact portion to be contacted.
[0013]
　The connector may be provided in plurality at different orientations with respect to the first terminal and the set of the plug of the second terminal.
[0014]
　The connector is the set of the first terminal and the second terminal may be provided in plurality at different lengths.
[0015]
　Direct current may be supplied from the current source.
[0016]
　Furthermore, in order to solve the above problems, according to another aspect of the present invention, a current source for supplying a current, a power receiving device that receives the supply of current from said current source, the current from the current source, and connecting anda connector supplied to the power receiving device that is, the power receiving device is to connect the plug to the connector is supplied with current from the current source, the connector, the plug being detachably connected and a shall connecting portion, the connecting portion is connected to a conductor for supplying the current from said current source, and is another contact is short-circuit current from the current source when a plug in the connecting portion is not connected , the connecting portion to flow a current from the short circuit by the contact with each other is canceled when the plug is connected is released the current source to the plug to the power reception device, the connection of the plug from the connecting portion There comprises a first and a terminal and a second terminal which when released is another contact again short-circuit current from said current source, the power feeding system is provided.
[0017]
　The power receiving device and the current source may perform transmission and reception of mutual information using the conductor.
[0018]
　It said power feeding system, a DC current may be supplied from the current source.
[0019]
　Said power feeding system, when the current is supplied from the current source further comprises a removable current source to compensate for the current is connected to the connector, the removable current source, at the time of connecting to the connector voltage is 0, it is also possible to perform the switching operation to change to a predetermined voltage after a predetermined time after the connection has elapsed.
Effect of the invention
[0020]
　According to the present invention, as described above, it receives power supply from the power source by connecting the load together in series, new and improved power feeding system, and is adapted for use in the power feed system, a new and improved and a connector can be provided.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021]
[Figure 1] Figure 1 is an explanatory diagram showing a schematic configuration of a power feeding system 1 according to the first embodiment of the present invention.
[Figure 2] Figure 2 is an explanatory view showing a structure example of a connector 20 and the plug 100.
[Figure 3] Figure 3 is an explanatory diagram showing a change in connecting the plug 100 to the connector 20.
[Figure 4] Figure 4 is an explanatory diagram showing a configuration example of a current type load 30 with a power switch.
[Figure 5] Figure 5 is an explanatory diagram showing another configuration example of the connector and the plug.
FIG. 6 is an explanatory diagram in the case of viewing the plug 100a shown in FIG. 5 from the front.
FIG. 7 is an explanatory diagram showing another configuration example of the connector and the plug.
[Figure 8] Figure 8 is an explanatory diagram showing another configuration example of the connector and the plug.
FIG. 9 is an explanatory diagram showing another configuration example of the connector and the plug.
[Figure 10] Figure 10 is an explanatory diagram showing another configuration example of the connector and the plug.
[11] Figure 11 is an explanatory view showing an application example of a power feeding system 1.
[12] Figure 12 is an explanatory diagram showing a configuration of a power feeding system 2 according to a second embodiment of the present invention.
[13] Figure 13 is an explanatory view showing an example of a typical constant-current circuit.
[14] Figure 14 is an explanatory view showing an example of a case of realizing a circuit that performs an increase in voltage without cutting the current through the semiconductor.
[Figure 15] Figure 15 is an explanatory diagram showing a configuration of a power feeding system 3 according to the third embodiment of the present invention.
[Figure 16] Figure 16 is a circuit unit including a voltage source 400 shown in FIG. 15 is an explanatory view showing that it is appropriately connected to the power feeding system 3.
[17] Figure 17 is an explanatory view showing the configuration of an electric vehicle 500 according to a fourth embodiment of the present invention.
EMBODIMENTS OF THE INVENTION
[0022]
　With reference to the accompanying drawings, it will be described in detail preferred embodiments of the present invention. It is to be noted that in the present specification and drawings, components having substantially the same function and structure, and repeated explanation of which are denoted by the same reference numerals.
[0023]
　The description will be made ​​in the following order.
　<1. First
　Embodiment> [1-1. Configuration of the power feeding
　system] [1-2. Example of the configuration of the connector and
　plug] [1-3. Application of the power feed
　system] <2. Second
　embodiment> <3. Third
　Embodiment> <4. Fourth
　Embodiment> <5. Summary>
[0024]
　<1. First
　Embodiment> [1-1. Power feed system configuration]
　First, a description will be given of a first configuration of a power feeding system according to an embodiment of the present invention with reference to the accompanying drawings. Figure 1 is an explanatory diagram showing a schematic configuration of a power feeding system 1 according to the first embodiment of the present invention.
[0025]
　As shown in Figure 1, the power feeding system 1 includes a current source 10, a connector 20, a current-type load 30, contains. Current source 10 is a power source that outputs an alternating or direct current. Incidentally, in order to configure the power feed system 1 shown in FIG. 1, it is practically preferable from the current source 10 which outputs a direct current.
[0026]
　Connector 20 is used to connect a current type load 30 to the power feeding system 1 includes a connection plug 100 is inserted. Such connecting parts are configured electrodes 21a, comprise 21b. Electrodes 21a, 21b is an electrode to be a closed state when the current type load 30 is not connected to the connector 20. This is different from the voltage-fed power distribution system in which the electrode is in the open state when the load (device) is not connected.
[0027]
　Current-load 30 includes a plug 100 for connection to a power feeding system 1. By plugging the plug 100 to the connecting portion of the connector 20, the plug 100 is the electrode 21a, in contact with 21b, it is possible to receive power from the current source 10. Incidentally, the plug 100 is configured to include an insulator 110 for preventing the short circuit of the electrodes (not shown in Figure 1).
[0028]
　When the load to the power supply system 1 is more than connection, as shown in Fig. 1, it is connected in series with respect to a current source 10. Current source 10 is preferably a constant current source which is controlled so as the number of loads connected to the power supply system 1 is constant current be increased or decreased, is used.
[0029]
　[1-2. Example of the configuration of the connector and plug]
　Then, it will be described in detail the structure of the connector 20 and the plug 100.
[0030]
　2 is an explanatory view showing a structure example of a connector 20 and the plug 100. Figure 2 (A) is an explanatory view showing a structure example of a connector 20 and the plug 100 in cross section. Figure 2 (B) is an explanatory view of the plug 100 from the front. As shown in FIG. 2 (A), the connector 20 is configured to include electrodes 21a, and 21b. The plug 100 is configured to include the electrodes 101a, 101b, the electrode 101a, the insulating material 110 for preventing short circuit 101b, a.
[0031]
　Plug 100 configured as described above my be described transition when connected to the connector 20. 3 is an explanatory diagram showing a change in connecting the plug 100 shown in Fig. 2 to the connector 20. Although not shown in Figure 3, the plug 100, some loads requiring current from the current source 10 is connected.
[0032]
　Figure 3 (A) is one in which the plug 100 is shown a state that is not connected to the connector 20. As shown in FIG. 3 (A), in the state where plug 100 is not connected to the connector 20, the electrodes 21a of the connector 20, 21b is in a state of being short-circuited.
[0033]
　Figure 3 (B) is one in which the plug 100 is shown a state in which it is inserted halfway into the connector 20. As shown in FIG. 3 (B), in a state where the plug 100 is inserted halfway into the connector 20, the electrode 101a may electrode 21a, the electrode 101b to the electrode 21b, there are connected, respectively, electrodes 21a, 21b It has become the still short-circuited state.
[0034]
　Figure 3 (C) is one in which the plug 100 is shown fully inserted state into the connector 20. As shown in FIG. 3 (C), in a state where the plug 100 is fully inserted into the connector 20, the electrode 101a may electrode 21a, the electrode 101b to the electrode 21b, is connected, further electrodes 21a, 21b and short circuit There has been canceled.
[0035]
　By configuring the FIG. 2 (A) connector 20 and the plug 100, as shown in, eliminating the interruption of the current in the current supply loop from the current source 10 in the power feeding system 1, a current-type load to the power feeding system 1 30 connected to, or it is possible to remove the current type load 30 from the power feeding system 1. Incidentally, it is possible to simplify the structure of the connector end of the electrode when the momentary interruption of the current in the current supply loop from the current source 10 in the power feeding system 1 is no problem even in the event.
[0036]
　Note that the equipment connected to the power feeding system 1, often even when the power supply switch for controlling a power reception of the electric power supplied from the current source 10 is required. Figure 4 is an explanatory diagram showing a configuration example of a current type load 30 with a power switch. The current type load 30 shown in Figure 4, a power switch 31 for controlling the receiving power supplied from the current source 10 is provided. The power switch 31, as can be seen from Figure 4, in a state of being short-circuited, the power supplied from the current source 10 to cut off the supply to the internal current-type load 30, in the open state, the supply from the current source 10 power difference is supplied to the inside of the current type load 30.
[0037]
　The structure of the connectors and plugs to receive power by connecting to a power feeding system 1, it is needless to say that it is not limited to those described above. Hereinafter, connect to the power feeding system 1 will be described connectors and another structural example of a plug for receiving a supply of power.
[0038]
　5 is an explanatory diagram showing by connecting to a power feeding system 1. The connectors and another configuration example of a plug for receiving a supply of power. In FIG. 5, it has shown the connector 20a and the plug 100a. Connectors and example of the structure of the plug shown in Figure 5, the connector 20a which is a female contact is divided into a plurality (two in the example of FIG. 5), it is obtained by connecting them in parallel.
[0039]
　6 is an explanatory view of a plug 100a, shown in Figure 5 from the front. Thus, the plug 100a includes an electrode 101a, 101b, the electrode 101a, a structure in which pairs are provided two of the insulator 110 which prevents a short circuit 101b.
[0040]
　The connector 20a, the electrode 21a as shown in FIG. 2 (A), is configured to include a 21b, and has a structure in which electrodes 21a, 21b of the pair are equipped two. electrode 21a If the plug 100a is not inserted, 21b becomes a short-circuit condition, the electrode 21a, a short circuit of the 21b is released by insertion of a plug 100a.
[0041]
　7 is an explanatory diagram to be connected to the power feeding system 1. The connectors and another configuration example of a plug for receiving a supply of power. FIG. 7 (A) are, we have shown the connector 20b and plug 100b. Connectors and example of the structure of the plug shown in FIG. 7 (A), the connector 20b of the female contact is divided into a plurality (two in the example of FIG. 5), by connecting them in parallel, more female The length of the contact serving electrode is obtained by different.
[0042]
　Figure 7 (B) and Figure 7 (C) is an explanatory view showing a structure of electrodes provided inside the connector 20b. Figure 7 (B) are those illustrated the electrodes 21a, 21b provided on the upper side of the connector 20b shown in FIG. 7 (A), the bottom of FIG. 7 (C) the connector 20b shown in Fig. 7 (A) electrode 21c provided on the side, the present invention illustrating a 21d.
[0043]
　Thus, by providing a different length electrode in the interior of the connector 20b, it is possible to prevent a momentary interruption of the current when inserting the plug 100b to the connector 20b mechanistically.
[0044]
　5 and 7 in the indicated connectors 20a, 20b, the electrode had achieved short between the electrodes by the pressure contact force by the elasticity of each. An example configuration for more efficiently realizing short of the electrode with each other.
[0045]
　Figure 8 (A) is an explanatory view showing a connector and another configuration example of a plug for connecting to a power feeding system 1 is supplied with power. In FIG. 8 (A), it has shown the connector 20c and plug 100c. In addition, FIG. 8 (B) is an explanatory view showing the connector 20c of the electrode 22 section shown in Figure 8 (A).
[0046]
　It is equipped with projections 111 made of insulating material for the plug 100c of FIG. 8 (A). This projection 111 has the effect, such as pushing the shorting contact 23 of the connector 20c. Connector 20c is a spring 24 for the electrodes to each other in the short state when the plug 100c is withdrawn is provided. Therefore, the connector 20c and the plug 100c is desirably provided with a latching mechanism or locking mechanism to overcome the restoring force of the spring 24.
[0047]
　In the series power supply as the power feed system 1 shown in Figure 1, it is desirable to put the polarity connector or plug.
[0048]
　Figure 9 (A) is an explanatory view showing a connector and another configuration example of a plug for connecting to a power feeding system 1 is supplied with power. In Fig. 9A, it has shown the connector 20d and plug 100d. Connector 20d as shown in FIG. 9 (A) of the connector 20c shown in FIG. 8 (A), are those in which the one electrode and the longitudinal direction in the shaft is rotated 90 degrees, the plug 100d is the With the rotation of one of the electrodes is obtained by rotating 90 degrees in the same axis longitudinal to one electrode.
[0049]
　Figure 9 (B) is an explanatory view showing an example of a cover of the shape of the connector 20d shown in FIG. 9 (A), it is an illustration of the connector 20a from the front.
[0050]
　Thus, it is possible to explicitly define the polarity by changing the orientation of one electrode. In order to explicitly define the polarity, it is needless to say that the arrangement of electrodes is not limited to such an example.
[0051]
　Figure 10 is an explanatory diagram showing by connecting to a power feeding system 1. The connectors and another configuration example of a plug for receiving a supply of power. In FIG. 10, it has shown the connector 20d and plug 100d.
[0052]
　Connectors 20d and a plug 100d, which is illustrated in Figure 10 is a switch with jacks and plugs have been widely used in a headphone or the like conventionally, and by the wiring of the connector 20d that is illustrated in Figure 10 the wires of the jack side, series-fed It can be used as the connector.
[0053]
　When the plug 100d is not inserted into the connector 20d that is illustrated in Figure 10, and is in a state in which the electrode 21a and the electrode 21b are short-circuited. When you insert a plug 100d to the connector 20d, short circuit between the electrodes 21a and 21b is released, the electrode 28 of the connector 20d is electrically connected to the electrode 114 of the plug 100d. Note plugs 100d includes a connection portion 112 for locking the electrode 21a at the time of insertion into the connector 20d, disposed between the connecting portion 112 and the electrode 114, an insulator 113 to prevent a short circuit between the connection portion 112 and the electrode 114 provided.
[0054]
　Connectors 20d and a plug 100d, which is illustrated in FIG. 10, that can be a configuration compact, it is possible to provide the polarity, there is an effect that the connecting portion 112 for locking the electrode 21a self-holding force is provided in the plug 100d.
[0055]
　Above is by connecting to a power feeding system 1 describes an example of the configuration of the connector and the plug for receiving a supply of power. Next, specific application examples of the power feeding system 1 according to the first embodiment of the present invention will be described with reference to the drawings.
[0056]
　[1-3. Application Example] of the power feeding system
　11 is an explanatory view showing an application example of a power feeding system 1 according to the first embodiment of the present invention. Figure 11 includes a current source 10, a connector 20, a LED lighting 200 as a current-type load, a plug 100 for connecting the LED lighting 200 to the power feeding system 1, and shows a. LED lighting 200 and the connector 20, plug 100 I assumed that the appropriate number is present.
[0057]
　In a first application example of the electricity power supply system 1 according to an embodiment of the present invention shown in FIG. 11, the current value is set by the current source 10. In addition, the voltage across the LED lighting 200 is determined by the physical properties of the LED, is about approximately one per 2 ~ 4V.
[0058]
　Therefore, even if connected, or disconnect any number of LED lighting 200, the current flowing through the LED lighting 200 is not changed, the brightness of each LED lighting 200 unchanged. And, it never is supplied excessively power to a specific LED lighting 200 as the number of LED lighting 200 is arbitrarily changed.
[0059]
　If, when the first power source of the power feeding system 1 according to an embodiment of the present invention is a voltage source, the voltage of the voltage source is substantially equal Senebanara a voltage determined by all of the LED lighting 200 which are connected in series not, changing the number of LED lighting 200, it is not must realistically be readjusted every time the change of voltage. Eventually, the constant current source and no Senebanara on the basis of the voltage source.
[0060]
　Even if it is a few units are connected in series LED lighting 200, (rated voltage of the unit changes to) and can be driven similarly in the same brightness of LED any number. Of course, in the case of connecting the switch to these LED units, it is possible to provide a power switch 31, as shown in FIG.
[0061]
　It is not limited to the first application example of the electricity power supply system 1 according to an embodiment of the present invention shown in FIG. 11, in the constant current supply, the total of the voltage across the load increases, to maintain the constant current property to, and thus to increase the output voltage of the current source 10. Therefore, beyond a certain voltage will not be longer constant current supply, the current is reduced. This is a constant voltage supply system, the total amount of current exceeds a prescribed value, is similar to more of the constant voltage properties can not be maintained.
[0062]
　Also, (basically this is a failed state) when the load becomes open all, results in the current loop is broken, in order to supply a constant current to this is infinity voltage becomes to occur. Practically, it determines the maximum value of the voltage, it is desirable that the voltage over the maximum value so as not to rise. This, in existing power supply grid is equivalent to applying a limiter to the maximum current value during the constant-voltage supply. Furthermore, the current value of the current source 10 to the variable, it is possible to allow control by the user, to control the brightness of the illumination can be very easily achieved.
[0063]
　<2. Second Embodiment>
　In the first embodiment of the present invention described above, it has been described the power supply system with power from the current source is supplied. As described in the aforementioned Patent Document 2 or the like, to the load that consumes power, not simply to supply power, and superimposes the information, there is a method of communicating to the load. In a second embodiment of the present invention, the main system current supply type is shown for the case of performing the communications with the external to the load.
[0064]
　Figure 12 is an explanatory diagram showing a configuration of a power feeding system 2 according to a second embodiment of the present invention. As shown in Figure 12, the power feeding system 2 according to a second embodiment of the present invention is connected to a current source 10, a connector 20, a current type load 300, a current type load 300 to the power feeding system 2 a plug 100 for, and are illustrated.
[0065]
　A current type load 300 includes a converter 301, a load control circuit 302, a load 303, a main switch 304, a communication circuit 310, an inductor L1, L2, L3, include constructed.
[0066]
　Conversion circuit 301, a battery for reserve power supplied to each part of the current type load 300 therein, the current load control circuit 302 and the communication circuit by converting the (voltage generated at both ends) from the connector 100 the circuit 310 like and supplies a power supply voltage.
[0067]
　The conversion circuit 301 is typically a general-purpose analog IC or microprocessor or the like which are available are those provided because they are voltage driven devices currently in principle, but can be designed current-driven device, such a device It's not the current situation there, is very unlikely to emerge in the future. Therefore, a current type load 300 according to this embodiment corresponds to the supply of the power supply voltage to the voltage-driven device provided with such a conversion circuit 301. Furthermore, to the conversion circuit 301 itself design is easy, since the voltage-powered device such as a load control circuit 302 and communication circuitry 310 may include the power-saving (= small current) have been developed, these voltage-type devices there is no inconvenience to be used.
[0068]
　The load control circuit 302 is for executing various controls to the load 303, it not only controls the load 303 has a function of communicating the state of the load 303 to the outside. Load 303 is the load current driven, it is to consume the electric power supplied from the battery 301 or current source 10. The main switch 304 is for controlling the power supply to the load 303 is not the main switch 304 is in the closed state takes place the power supply to the load 303, the main switch 304 to the load 303 in an open state I will be power supply is carried out.
[0069]
　The communication circuit 310 is for enabling communication with conductors of the power feeding system 2, and an operational amplifier 311, includes an amplifier 312, and resistors R1, R2, and. The inductors L1, L2, L3 is a bond circuit of the current type, it is intended to be used for communication by the communication circuit 310. It is not shown in FIG. 12, but has a communication function similar to the communication circuit 310 to the current source 10, a current source 10, performing the communication with the current type load 300 connected to any in, and or control the state of the load 303, the state of the load 303 can be or to know the current source.
[0070]
　Specifically, a current type load 300, prior to supplying power to the load 303 by the main switch 304 to open, and executes the negotiation between the current source 10 for the supply contents. The contents to be negotiated, for example, the load 303 since it is a current-driven, and may be information of the voltage that the load 303 is required. When the negotiation is complete, the current source 10 starts supplying power to the current type load 300. Therefore, the load control circuit 302, it is desirable that stores at least operation start conditions and standards of the load 303. The actual and negotiation protocol for its specific examples, since the described in Patent Document 2 and the like described above, detailed description will be omitted.
[0071]
　<3. Third Embodiment>
　In the second embodiment of the present invention described above, the main system is a current-fed, has been described for the case of implementing the communication with the outside to the load.
[0072]
　In the above embodiments have been described for the case of connecting a load in series, the number of loads increases, for supplying a constant current to a respective load, the power supply voltage of the supply increases. Therefore, when the number of loads increases, lack of supply voltage itself of the constant current device may occur. This corresponds to a shortage of current capacity at the constant voltage power supply.
[0073]
　On the other hand, in the case of a constant current system, basically without it is desirable that cut the current, means for adjusting the power supply voltage of without turning off the current is desirable.
[0074]
　Therefore, in the third embodiment of the present invention, it will be described a power feeding system that can moderate the supply voltage without cutting current.
[0075]
　First, in a typical constant current circuit will be described the problem of trying to moderate the supply voltage without cutting current. Figure 13 is an explanatory view showing an example of a typical constant-current circuit. 13 includes a current source 10, a switch 11, (in this case three) more and are illustrated, the load 40.
[0076]
　In such a constant current circuit, the current source, to the voltage source in series, it is necessary to temporarily insert a voltage source from the open circuit. In the circuit, such as for example the current source 10 and the load 40 as shown in Figure 13 is connected, when the voltage of the current source 10 is insufficient, it is desired to insert a voltage source 12 to the circuit, once turning off the series switch 11 It can not be inserted and no. If the switch 11 connects the left voltage source 12 turned on, it short-circuited the voltage source 12 by the switch 11.
[0077]
　Therefore, in the serial mode power supply, in order to perform the voltage increase in without cutting the current in advance, a voltage zero, it is desirable to put a circuit as can be changed to a predetermined voltage.
[0078]
　Figure 14 is an explanatory view showing an example of a case of realizing such a circuit by a semiconductor. A in Figure 14, NPN transistors TR 1 and are those with the resistor R11, R12, B in Fig. 14 PNP transistor TR 2 is obtained by using the a, resistors R11, R12. Both By selecting the values ​​of the resistors R11, R12 suitably, it is possible to generate an equivalent voltage to the voltage source 12. Note that arrows shown in FIG. 14 represents the direction of the current. However, none of the A, B in FIG. 14, not generating its own voltage, the outside has a power supply is just as the current is supplied as indicated by an arrow look like a voltage source 12. Then, when the R12 infinity in the circuit shown in Figure 14, the transistors TR 1 , TR 2 are both visible to the diode.
[0079]
　This is by using the circuit shown in Figure 14, in the serial mode power supply, it is possible to perform the increase of the voltage without cutting current. Figure 15 is an explanatory diagram showing a third configuration of a power feeding system 3 according to an embodiment of the present invention. As shown in Figure 15, the power feeding system 3 according to the third embodiment of the present invention, a voltage source 12, a load 40, resistors R21, R22, R23, NPN transistor TR 0 consisting of and the operational amplifier 50. and it is configured to include a constant current circuit.
[0080]
　The power feeding system 3 of FIG. 15, when the load 40 is further increased, or when the power consumption of the load 40 increases, the voltage shortage of the voltage source 12 may occur. So, we described how to connect the new voltage source 400 without turning off the circuit.
[0081]
　As shown in Figure 15, the voltage source 400 includes a switch 401 and 402, a voltage source 410, PNP transistor TR 2 configured to include a, a resistor R11, and R12.
[0082]
　Switch 401 and 402 is initially an open state. When the switch 401 and 402 is in the open state, PNP transistor TR 2 is seen simply diode and the voltage source 400 does not generate almost voltages as a whole.
[0083]
　When the switch 402 is turned from this state, PNP transistor TR 2 is operated as a circuit having the same potential difference between the voltage source 410. Accordingly, followed by that switch 401 is turned on, the voltage source 410 is valid. Finally and by turning off the switch 402, the voltage source 410 is connected to the power feeding system 3. It should be noted that, when you turn off this time to 402, PNP transistor TR for voltage source 410 2 reverse bias is applied to, PNP transistor TR 2 is no longer visible to the diode.
[0084]
　Since this operation consumes a certain voltage by voltage source 400, it is not performed before the under-voltage due to the load 40 or the like occurs, it is not possible to maintain a constant current of.
[0085]
　Figure 16 is a circuit unit including a voltage source 400 shown in FIG. 15 is an explanatory view showing that it is appropriately connected to the power feeding system 3. Voltage source 400 is inside is provided with a switch 401 and 402, both prior to connecting to a power feeding system 3 to the open state. This unit have been prepared plug 100 for series connection and connected to the power feeding system 3, diode corresponding to one of the potential difference is generated at both ends of the plug 100. Then by turning on the switch 402, the potential difference across the plug 100 becomes a potential corresponding to a voltage source 410, Thereafter, by turning on the switch 401, the actual voltage source 410 to the power feeding system 3 It is connected.
[0086]
　Thus, the voltage source 400 is, after connecting to the connector (the connector 20 shown in FIG. 1, for example), it is necessary to perform sequential opening and closing control of the switch 401. For example, by rotating after inserting the plug 100 into the connector, the structure may be provided so as to operate the switch 401 and 402 sequentially.
[0087]
　<4. Fourth Embodiment>
　electric vehicle having a built-in drive motor in the wheel, the minimum motor is two required in for the wheel drive. It becomes four required in the case of driving both the front and rear wheels, the number will vary depending on the number of wheels should be driven.
[0088]
　For electric vehicles these in-wheel type driving motor of the pair of right and left wheels, when stopping the rotation failed only one side of the motor, are obtained it occurs to a significant impact with respect to the traveling direction, a dangerous is there. The easiest way to avoid such effects, the main circuit connection of the wheel drive motor which become the right and left pair is to the series. The motor which is in series, is susceptible to constant voltage drive or the constant current drive, when at least one drive connection of one of the motors is disconnected, the driving force to the left and right wheel pair will disappear simultaneously.
[0089]
　In the driving by the in-wheel motor, upon traveling direction of the change, also requires the rotation speed of the change control for the left and right wheels can not change control of the speed in the case of simply connecting the motor to the series. Therefore, for the left and right motors in the wheel, if such rotor is used a brushless motor such that the magnet, to prepare an auxiliary winding in the stator winding, and the left and right by adjusting the the current motor It does measure adjustment. Since this adjustment is left separately, although the series connection of the motor is in principle unsuitable, the adjustment amount is small when compared to the amount of current of the main connection.
[0090]
　Therefore, a primary connection in the series, while ensuring the safety when the motor power line is disconnected, it is possible (to some extent) of the speed difference control for the left and right wheels.
[0091]
　Figure 17 is an explanatory view showing the configuration of an electric vehicle 500 according to a fourth embodiment of the present invention. Figure 17 is a connection between the motor and the control circuit in consideration of practicality is shown.
[0092]
　In the electric vehicle 500 shown in Fig. 17, the front wheels 501a, 501b and the rear wheels 501c, 501d are driven portion at left and right paired. The front wheels 501a, 501b and the rear wheels 501c, the motor is built respectively to 501d, practically is three-phase brushless motor is used, it is driven here by a DC motor powered by two lines in order to simplify the description and it shall be.
[0093]
　Power supply lines 502a, 502b, respectively the front wheels 501a, are those that correspond to 501b, which are serially connected in the driving inverter 510. The power supply lines 502c, 502d are respectively rear wheels 501c, are those that correspond to 501d, which are connected in series inside the driving inverter 510. Of course, it is may be connected in series with an external driving inverter 510, and given the practical connection, power lines from all of the drive unit is an expedient to design a common specification, are shown in Figure 17 It is efficient to connect to a driving inverter 510 as.
[0094]
　Drive inverter 5100 has a power output unit 520, the power output unit 520 is configured to include a front wheel driving output portion 521, a rear wheel driving output section 522, a. Since we assumed that represent only the main drive portion, a front wheel driving output portion 521 and a rear wheel driving output portion 522 may be a voltage drive type it may be a current-driven, the combination of these It may be one. That is, the driving system of the front-wheel drive for the output section 521 and the rear-wheel drive for the output section 522 does not matter whether the current drive type is a voltage-driven.
[0095]
　In the electric vehicle 500 shown in FIG. 17, the power supply lines 502a, 502b, 502c, even any is disconnected in 502d, the unbalance of the driving force between the right and left wheels does not occur. Therefore, the power supply line 502a while traveling, 502b, 502c, even if any of 502d is broken, instability of the steering does not occur.
[0096]
　In this embodiment, the motor can be driven at a constant current at a constant voltage, and connecting the motor and the inverter is in principle a permanent connection. Therefore, the present embodiment, means that a series connection which is suitable for constant current drive is not a focus disconnection time measures of the main drive the connection line.
[0097]
　<5. Conclusion>
　As described above, according to the embodiments of the present invention, any number of the current type load, in the power supply system as the current type power source is connected in series, the load is connected by the connector, the cutting It is possible, and includes a no connection, cleavable connector to cut the whole of the current loop. Thus, it without connection to cut the current loop when the load of the connection or disconnection, it is possible to cut.
[0098]
　A pair of connectors used for the power supply, the plug when the plug is not connected to the connector inside the electrodes are short-circuited, first, when the plug is connected, at both ends and the connector electrode of the plug is connected, and then and has a three-stage of the conditions, such as short circuit of the connector is released. Thus, any number of the current type load, in the power supply system as the current type power source is connected in series, that without the connection to cut the current loop when the load connection and disconnection, and can be cut Become.
[0099]
　Also, any number of the current type load, in the power supply system as the current type power source is connected in series with the load, with the power source, that it has a communication means which is superimposed on the power supply loop, the load, the power it is possible to determine the state of the system by the communication between the source.
[0100]
　Has been described in detail preferred embodiments of the present invention with reference to the accompanying drawings, the present invention is not limited thereto. If a person having ordinary skill in the art of belongs techniques of the present invention, within the scope of the technical idea described in the claims, it is clear that can conceive various changes and modifications , for at these, it is understood to those naturally belong to the technical scope of the invention.
Description of the code
[0101]
　1 power feed system
　10 current source
　20 connector
　21a, 21b electrode
　30 current type load
　100 plug
　101a, 101b electrode

Claims
[Claim 1]
　Disposed in series with a current source, comprising a connecting part which the plug is detachably connected,
　the connecting portion, wherein it is connected to a lead wire for passing current from the current source, have plugs connected to the connecting portion by being mutually contacted to short-circuit the current from the current source in the absence, the current source the short circuit is released to the plug by contact with each other is canceled when the plug is connected to the connecting portion flowing a current from, comprising a first terminal and a second terminal When the plug of the connecting the connecting portion is released is another contact again shorting the current from the current source, the connector.
[Claim 2]
　To prevent desorption of the plug in case that the plug is connected to the connection portion, a contact portion contacting said first terminal and said second terminal when the connection of the plug is released from said connecting portion further comprising, The connector according to claim 1.
[Claim 3]
　It said first terminal and said set of second terminals, and the plurality in different orientations with respect to the plug and connector according to claim 1.
[Claim 4]
　It said first terminal and said set of second terminals are provided several in different lengths and connector according to claim 1.
[Claim 5]
　From the current source DC current is supplied, the connector according to claim 1.
[6.]
　A current source for supplying a current,
　a power receiving device that receives the supply of current from said current source,
　the current from the current source, and the connector supplied to the power receiving apparatus to be connected,
provided with,
　the power reception device, the Connect the plug to the connector supplied with current from the current source,
　wherein the connector is
　provided with a connecting portion to which the plug is detachably connected,
　leads the connecting portion, for passing a current from the current source is connected with the case where the plug to the connection portion is not connected by being mutually contacted to short-circuit the current from the current source, the contact with each other is canceled when the plug is connected to the connecting portion in a current flows from the short circuit is released the current source to the plug to the power reception device, the second when the connecting portion connecting the plug is released by being mutually contacted again shorting the current from the current source 1 of the terminal and the second terminal,
equipped with a power feed system.
[7.]
　The power receiving device and the current source performs transmission and reception of mutual information using the conductor, the power feeding system according to claim 6.
[8.]
　It said current source DC current is supplied to the power feeding system according to claim 6.
[9.]
　When the current is supplied from the current source, further comprising a removable current source to compensate for the current is connected to the connector,
　the removable current source, the voltage at the time of connecting to the connector is 0, performing a switching operation to change to a predetermined voltage after a predetermined time after the connection has passed, the power feeding system according to claim 6.