The present invention relates to an adhesive laminated core for a stator and a rotary electric machine.
　The present application claims priority based on Japanese Patent Application No. 2018-235863 filed in Japan on December 17, 2018, the contents of which are incorporated herein by reference.
Background technology
[0002]
　In the laminated core used for the motor, if the thickness of the electromagnetic steel sheet is reduced, the rigidity per electromagnetic steel sheet is reduced. Therefore, although the number of laminated cores increases, the rigidity of the laminated core as a whole also decreases. In this case, when the motor is operated, the stator may be deformed or the laminated core may be displaced due to the rotation of the rotor. Further, when the number of laminated cores is increased, handling at the time of manufacturing the laminated core becomes difficult, and problems such as deformation of the laminated core and difficulty in winding processing occur.
[0003]
　To solve such a problem, for example, as in the motor core (laminated core) described in Patent Document 1 below, the mechanical strength of the laminated core is increased by fixing the shape of the laminated core with an adhesive. .. That is, in the motor core described in Patent Document 1, the room temperature curing type instant adhesive layer is arranged so as to extend in the direction in which the teeth portion extends (radial direction) in all the teeth portions. Further, a plurality of thermosetting organic adhesive layers are arranged along the circumferential direction of the substantially annular electromagnetic steel sheet. Then, the adjacent electromagnetic steel sheets are bonded by a room temperature curing type instant adhesive layer and a thermosetting type organic adhesive layer.
Prior art literature
Patent documents
[0004]
Patent Document 1: Japanese Patent Application Laid-Open No. 2016-171652
Outline of the invention
Problems to be solved by the invention
[0005]
　However, if the strength of the adhesive in the teeth portion is too high, a compressive force due to shrinkage when the adhesive is cured is applied to the teeth portion, which adversely affects the magnetic properties thereof. In the technique disclosed in Patent Document 1, this problem is not recognized, and, of course, no measures are taken to solve this problem.
[0006]
　The present invention has been made in view of the above circumstances, and includes an adhesive laminated core for a stator having an adhesive structure that does not adversely affect the magnetic characteristics of the teeth portion while increasing the mechanical strength, and an adhesive laminated core for the stator. The challenge is to provide it with a rotating electric machine.
Means to solve problems
[0007]
　In order to solve the above problems, the present invention employs the following means.
(1) The adhesive laminated core for a stator according to one aspect of the present invention has a plurality of electromagnetic steel plates having a core back portion and a teeth portion and laminated coaxially, and a plurality of electromagnetic steel plates for adhering between the electromagnetic steel plates. The partial adhesive strength, which is the average adhesive strength per unit area of ​​the teeth portion, is the average adhesive strength per unit area of ​​the core back portion between the electromagnetic steel plates provided with the adhesive portion. It is lower than a certain partial adhesive strength.
[0008]
(2) In the embodiment described in (1) above, the following configuration may be adopted: the average of the adhesive strength ratio obtained by dividing the partial adhesive strength in the teeth portion by the partial adhesive strength in the core back portion. The value is in the range of 0.1 or more and less than 1.0.
[0009]
(3) In the embodiment described in (1) or (2) above, the following configuration may be adopted: the average value S1 of the partial adhesive strength in the teeth portion is 1 to 15 MPa, and the core back portion. The average value S2 of the partial adhesive strength in the above is 15 to 50 MPa, and the average value S1 is lower than the average value S2.
[0010]
(4) In the embodiment described in (1) or (2) above, the following configuration may be adopted: each of the adhesive portions in the teeth portion is made of an adhesive having the same chemical component. The average value A1 of the area ratio of the above is 10 to 50%, the average value A2 of the area ratio of each of the adhesive portions in the core back portion is 50 to 100%, and the average value A1 is the average value A2. Lower than.
[0011]
(5) In the embodiment according to any one of (1) to (4) above, the average thickness of each of the bonded portions may be 1.0 μm to 3.0 μm.
[0012]
(6) In the embodiment according to any one of (1) to (5) above, the average tensile elastic modulus E of each of the bonded portions may be 1500 MPa to 4500 MPa.
[0013]
(7) In the embodiment according to any one of (1) to (6) above, each of the adhesive portions is a room temperature adhesive type acrylic adhesive containing SGA made of an elastomer-containing acrylic adhesive. May be good.
[0014]
(8) The rotary electric machine according to one aspect of the present invention includes the adhesive laminated core for a stator according to any one of (1) to (7) above.
The invention's effect
[0015]
　According to each of the above aspects of the present invention, an adhesive laminated core for a stator having an adhesive structure that does not adversely affect the magnetic characteristics of the teeth portion while increasing the mechanical strength, and a rotary electric machine provided with the adhesive laminated core for the stator. Can be provided.
A brief description of the drawing
[0016]
FIG. 1 is a cross-sectional view of a rotary electric machine provided with an adhesive laminated core for a stator according to an embodiment of the present invention.
[Fig. 2] Fig. 2 is a side view of the adhesive laminated core for the same stator.
FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2 showing a plurality of examples of formation patterns of adhesive portions in the adhesive laminated core for the same stator.
FIG. 4 is a side view of a manufacturing apparatus used to manufacture an embodiment of an adhesive laminated core for a stator.
FIG. 5 is a diagram showing examples shown in Tables 1A and 1B, and is a graph showing the relationship between the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position.
FIG. 6 is a diagram showing examples shown in Tables 2A and 2B, and is a graph showing the relationship between the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position.
FIG. 7 is a diagram showing examples shown in Tables 3A and 3B, and is a graph showing the relationship between the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position.
FIG. 8 is a diagram showing examples shown in Tables 3A and 3B, and is a graph showing the relationship between the area ratio at the teeth portion position and the area ratio at the core back portion position.
Mode for carrying out the invention
[0017]
　Hereinafter, with reference to the drawings, an adhesive laminated core for a stator according to an embodiment of the present invention and a rotary electric machine provided with the adhesive laminated core for a stator will be described. In the present embodiment, an electric motor as a rotary electric machine, specifically an AC electric motor, more specifically a synchronous electric motor, and even more specifically, a permanent magnet field type electric motor will be described as an example. This type of electric motor is suitably used for, for example, an electric vehicle.
[0018]
　As shown in FIG. 1, the rotary electric machine 10 includes a stator 20, a rotor 30, a case 50, and a rotary shaft 60. The stator 20 and rotor 30 are housed in a case 50. The stator 20 is fixed in the case 50.
　In the present embodiment, as the rotary electric machine 10, an inner rotor type in which the rotor 30 is located inside the stator 20 in the radial direction is adopted. However, as the rotary electric machine 10, an outer rotor type in which the rotor 30 is located outside the stator 20 may be adopted. Further, in the present embodiment, the rotary electric machine 10 is a 12-pole 18-slot three-phase AC motor. However, the number of poles, the number of slots, the number of phases, and the like can be changed as appropriate.
　The rotary electric machine 10 can rotate at a rotation speed of 1000 rpm by applying an exciting current having an effective value of 10 A and a frequency of 100 Hz to each phase, for example.
[0019]
　The stator 20 includes an adhesive laminated core for a stator (hereinafter referred to as a stator core) 21 and a winding not shown.
　The stator core 21 includes an annular core back portion 22 and a plurality of teeth portions 23. Hereinafter, the central axis O direction of the stator core 21 (or core back portion 22) is referred to as an axial direction, and the radial direction of the stator core 21 (or core back portion 22) (direction orthogonal to the central axis O) is referred to as a radial direction. The circumferential direction of the stator core 21 (or core back portion 22) (direction that orbits around the central axis O) is referred to as a circumferential direction.
[0020]
　The core back portion 22 is formed in an annular shape in a plan view of the stator 20 when viewed from the axial direction.
　The plurality of tooth portions 23 project from the inner circumference of the core back portion 22 inward in the radial direction (toward the central axis O of the core back portion 22 along the radial direction). The plurality of tooth portions 23 are arranged at equal angular intervals in the circumferential direction. In the present embodiment, 18 tooth portions 23 are provided at every 20 degrees of the central angle centered on the central axis O. The plurality of tooth portions 23 are formed to have the same shape and the same size as each other. Therefore, the plurality of tooth portions 23 have the same thickness dimension as each other.
　The winding is wound around the teeth portion 23. The winding may be a centralized winding or a distributed winding.
[0021]
　The rotor 30 is arranged inside the stator 20 (stator core 21) in the radial direction. The rotor 30 includes a rotor core 31 and a plurality of permanent magnets 32.
　The rotor core 31 is formed in an annular shape (annular ring) arranged coaxially with the stator 20. The rotating shaft 60 is arranged in the rotor core 31. The rotating shaft 60 is fixed to the rotor core 31.
　The plurality of permanent magnets 32 are fixed to the rotor core 31. In this embodiment, a set of two permanent magnets 32 form one magnetic pole. The plurality of sets of permanent magnets 32 are arranged at equal angular intervals in the circumferential direction. In the present embodiment, 12 sets (24 in total) of permanent magnets 32 are provided at a central angle of 30 degrees about the central axis O.
[0022]
　In this embodiment, an embedded magnet type motor is adopted as a permanent magnet field type motor. The rotor core 31 is formed with a plurality of through holes 33 that penetrate the rotor core 31 in the axial direction. The plurality of through holes 33 are provided corresponding to the arrangement of the plurality of permanent magnets 32. Each permanent magnet 32 ​​is fixed to the rotor core 31 in a state of being arranged in the corresponding through hole 33. The fixing of each permanent magnet 32 ​​to the rotor core 31 can be realized, for example, by adhering the outer surface of the permanent magnet 32 ​​and the inner surface of the through hole 33 with an adhesive. As the permanent magnet field type motor, a surface magnet type motor may be adopted instead of the embedded magnet type.
[0023]
　Both the stator core 21 and the rotor core 31 are laminated cores. For example, as shown in FIG. 2, the stator core 21 is formed by laminating a plurality of electromagnetic steel sheets 40 in the laminating direction.
　The product thickness (total length along the central axis O) of each of the stator core 21 and the rotor core 31 is, for example, 50.0 mm. The outer diameter of the stator core 21 is, for example, 250.0 mm. The inner diameter of the stator core 21 is, for example, 165.0 mm. The outer diameter of the rotor core 31 is, for example, 163.0 mm. The inner diameter of the rotor core 31 is, for example, 30.0 mm. However, these values ​​are examples, and the product thickness, outer diameter and inner diameter of the stator core 21, and the product thickness, outer diameter and inner diameter of the rotor core 31 are not limited to these values. Here, the inner diameter of the stator core 21 is based on the tip of the teeth portion 23 of the stator core 21. That is, the inner diameter of the stator core 21 is the diameter of a virtual circle inscribed in the tips of all the teeth portions 23.
[0024]
　Each of the electromagnetic steel sheets 40 forming the stator core 21 and the rotor core 31 is formed, for example, by punching an electromagnetic steel sheet as a base material. As the electromagnetic steel sheet 40, a known electrical steel sheet can be used. The chemical composition of the electrical steel sheet 40 contains 2.5% to 3.9% Si, as shown below in units of mass%. The range other than Si is not particularly limited, but a good range in this embodiment is specified below. By setting the chemical composition in this range, the yield strength YP of each electrical steel sheet 40 can be set to 380 MPa or more and 540 MPa or less.
[0025]
　Si: 2.5% to 3.9%
　Al: 0.001% to 3.0%
　Mn: 0.05% to 5.0%
　Remaining: Fe and impurities
[0026]
　In this embodiment, a non-oriented electrical steel sheet is used as the electrical steel sheet 40. As the non-oriented electrical steel sheet, a non-oriented electrical steel strip of JISC2552: 2014 can be adopted. However, as the electromagnetic steel sheet 40, a grain-oriented electrical steel sheet may be used instead of the non-oriented electrical steel sheet. As the grain-oriented electrical steel sheet in this case, a grain-oriented electrical steel strip of JISC2553: 2012 can be adopted.
[0027]
　Both sides of the electrical steel sheet 40 are coated with an insulating film in order to improve the workability of the electrical steel sheet 40 and the iron loss of the stator core 21 (hereinafter, may be simply referred to as “laminated core”). As the substance constituting the insulating film, for example, (1) an inorganic compound, (2) an organic resin, (3) a mixture of an inorganic compound and an organic resin, and the like can be adopted. Of these, when the insulating film is (1) an inorganic compound or (3) a mixture of an inorganic compound and an organic resin, the magnetic properties of each bonded portion are significantly reduced due to shrinkage during curing. Can be suppressed. Examples of the inorganic compound include (1) a complex of dichromate and boric acid, and (2) a complex of phosphate and silica. Examples of the organic resin include epoxy-based resin, acrylic-based resin, acrylic-styrene-based resin, polyester-based resin, silicon-based resin, and fluorine-based resin.
[0028]
　In order to ensure the insulation performance between the electromagnetic steel sheets 40 laminated with each other, the upper limit of the average thickness of the insulating coating (average thickness per one side of the electromagnetic steel sheets 40) is 1.5 μm, more preferably 1.2 μm. It is better to do it.
　On the other hand, the insulating effect is saturated as the insulating film becomes thicker. Further, as the insulating film becomes thicker, the proportion of the electromagnetic steel sheet 40 in the laminated core decreases, and the performance as the laminated core deteriorates. Therefore, the insulating coating should be as thin as possible to ensure the insulating performance. The lower limit of the average thickness of the insulating film (thickness per one side of the electromagnetic steel sheet 40) is preferably 0.3 μm, more preferably 0.5 μm. As the average thickness of the insulating film, for example, 0.8 μm can be adopted within the above upper and lower limit ranges.
　The average thickness of the insulating coating is the average value of the laminated core as a whole. The thickness of the insulating coating hardly changes depending on the stacking position along the stacking direction and the circumferential position around the central axis of the laminated core. Therefore, the average thickness of the insulating coating can be set as the value measured at the upper end position of the laminated core.
[0029]
　As the thickness of the electromagnetic steel sheet 40 becomes thinner, the effect of improving iron loss gradually saturates. Further, as the electromagnetic steel sheet 40 becomes thinner, the manufacturing cost of the electrical steel sheet 40 increases. Therefore, the thickness of the electrical steel sheet 40 is preferably 0.10 mm or more in consideration of the effect of improving iron loss and the manufacturing cost.
　On the other hand, if the electromagnetic steel sheet 40 is too thick, the press punching operation of the electrical steel sheet 40 becomes difficult. Therefore, considering the press punching work of the electrical steel sheet 40, the thickness of the electrical steel sheet 40 is preferably 0.65 mm or less. The thickness of the electrical steel sheet 40 includes the thickness of the insulating coating.
　The average thickness of each electrical steel sheet 40 is an average value of the laminated core as a whole. The thickness of each electrical steel sheet 40 is almost unchanged depending on the stacking position along the stacking direction and the circumferential position around the central axis of the laminated core. Therefore, the average thickness of each electrical steel sheet 40 can be set as a value measured at the upper end position of the laminated core.
[0030]
　The plurality of electrical steel sheets 40 forming the stator core 21 are laminated, for example, via a plurality of point-shaped adhesive portions 41. Each of the adhesive portions 41 is formed of an adhesive that has been cured without being divided. For the adhesive portion 41, for example, a thermosetting adhesive by polymerization bonding or the like is used. The adhesive for forming the adhesive portion 41 includes any one of (1) acrylic resin, (2) epoxy resin, (3) acrylic resin and epoxy resin, which has oil surface adhesiveness. Epoxy can be used.
[0031]
　As the adhesive for forming the adhesive portion 41, a thermosetting type adhesive as well as a radical polymerization type adhesive can be used, and from the viewpoint of productivity, a room temperature curable type adhesive is used. It is desirable to do. The room temperature curable adhesive cures at 20 ° C to 30 ° C. As the room temperature curing type (normal temperature adhesive type) adhesive, an acrylic adhesive is preferable. Typical acrylic adhesives include SGA (Second Generation Acrylic Adhesives. Second Generation Acrylic Adhesive) and the like. An anaerobic adhesive, an instant adhesive, and an elastomer-containing acrylic adhesive can be used as long as the effects of the present invention are not impaired. The adhesive referred to here refers to a state before curing, and becomes an adhesive portion 41 after the adhesive is cured.
[0032]
　The average tensile elastic modulus of the bonded portion 41 at room temperature (20 ° C. to 30 ° C.) is in the range of 1500 MPa to 4500 MPa. If the average tensile elastic modulus of the bonded portion 41 is less than 1500 MPa, there will be a problem that the rigidity of the laminated core is lowered. Therefore, the lower limit of the average tensile elastic modulus of the bonded portion 41 is 1500 MPa, more preferably 1800 MPa. On the contrary, when the average tensile elastic modulus of the bonded portion 41 exceeds 4500 MPa, the stress strain applied to the electromagnetic steel sheet 40 becomes large, and the core magnetism deteriorates. Therefore, the upper limit of the average tensile elastic modulus of the adhesive portion 41 is 4500 MPa, more preferably 3650 MPa. The average tensile elastic modulus of each adhesive portion 41 can be adjusted by changing one or both of the heating and pressurizing conditions applied at the time of adhesion and the type of curing agent.
　The average tensile elastic modulus E is measured by the resonance method. Specifically, the average tensile modulus is measured according to JIS R 1602: 1995.
[0033]
　More specifically, first, a sample for measurement (not shown) is produced. This sample is obtained by adhering two electromagnetic steel sheets 40 together with an adhesive to be measured and curing them to form an adhesive portion 41. When the adhesive is a thermosetting type, this curing is performed by heating and pressurizing under the heating and pressurizing conditions in actual operation. On the other hand, when the adhesive is a room temperature curing type, it is performed by pressurizing at room temperature.
　Then, the tensile elastic modulus of this sample is measured by the resonance method. As described above, the method for measuring the tensile elastic modulus by the resonance method is performed in accordance with JIS R 1602: 1995. After that, the tensile elastic modulus of the bonded portion 41 alone can be obtained by removing the influence of the electromagnetic steel sheet 40 itself from the tensile elastic modulus (measured value) of the sample by calculation.
[0034]
　Since the tensile elastic modulus obtained from the sample in this way is equal to the average value of the entire laminated core, this value is regarded as the average tensile elastic modulus. The composition is set so that the average tensile elastic modulus hardly changes depending on the stacking position along the stacking direction and the circumferential position around the central axis of the laminated core. Therefore, the average tensile elastic modulus can be set to the value of the cured adhesive portion 41 at the upper end position of the laminated core.
[0035]
　As a method of adhering between a plurality of electrical steel sheets 40, an adhesive is applied to the lower surface (one surface) of the electrical steel sheets 40, then they are overlapped, and then one or both of heating and crimping are performed to cure the bonded portion. By forming 41, a method of bonding can be adopted. The means for heating may be any means such as a means for heating the stator core 21 in a high temperature bath or an electric furnace, or a method for directly energizing and heating the stator core 21. On the other hand, when a room temperature curing type adhesive is used, it is adhered only by crimping without heating.
[0036]
　In order to obtain stable and sufficient adhesive strength, the thickness of the adhesive portion 41 is preferably 1 μm or more.
　On the other hand, when the thickness of the adhesive portion 41 exceeds 100 μm, the adhesive force is saturated. Further, as the adhesive portion 41 becomes thicker, the space factor decreases, and the magnetic properties such as iron loss of the laminated core decrease. Therefore, the thickness of the adhesive portion 41 is preferably 1 μm or more and 100 μm or less, more preferably 1 μm or more and 10 μm or less.
　In the above, the thickness of the adhesive portion 41 means the average thickness of the adhesive portion 41.
[0037]
　The average thickness of the bonded portion 41 is more preferably 1.0 μm or more and 3.0 μm or less. If the average thickness of the adhesive portion 41 is less than 1.0 μm, sufficient adhesive strength cannot be secured as described above. Therefore, the lower limit of the average thickness of the adhesive portion 41 is 1.0 μm, more preferably 1.2 μm. On the contrary, if the average thickness of the bonded portion 41 becomes thicker than 3.0 μm, problems such as a large increase in the amount of strain of the electromagnetic steel sheet 40 due to shrinkage during thermosetting occur. Therefore, the upper limit of the average thickness of the adhesive portion 41 is 3.0 μm, more preferably 2.6 μm.
[0038]
　The average thickness of the bonded portion 41 is an average value of the laminated core as a whole. The average thickness of the adhesive portion 41 is almost the same at the stacking position along the stacking direction and the circumferential position around the central axis of the laminated core. Therefore, the average thickness of the adhesive portion 41 can be set as the average value of the numerical values ​​measured at 10 or more points in the circumferential direction at the upper end position of the laminated core.
　The average thickness of the adhesive portion 41 can be adjusted by changing, for example, the amount of the adhesive applied.
[0039]
　FIG. 3 shows an example of the formation pattern of the adhesive portion 41. In FIG. 3, two forming patterns 41A and 41B are shown together in one figure with the alternate long and short dash line as a boundary. When the forming pattern 41A is adopted, the entire surface of the electromagnetic steel sheet 40 is formed in such a coating pattern. On the other hand, when the forming pattern 41B is adopted, the entire surface of the electromagnetic steel sheet 40 is formed in such a coating pattern.
　First, in the case of the formation pattern 41A, the adhesive portion 41 is formed so that the average area ratio of the core back portion 22 and the average area ratio of the teeth portion 23 are equal to each other at each position in the stacking direction of the laminated cores. , The components of the adhesive itself used are different from each other. In the core back portion 22, a plurality of circular point-shaped adhesive portions 41 are arranged in an annular shape. Each of the adhesive portions 41 on the core back portion 22 is arranged so as to be overlapped on the virtual straight line EL1 connecting the center position in the width direction of each tooth portion 23 and the central axis O of the electromagnetic steel plate 40.
[0040]
　On the other hand, in the teeth portion 23, two adhesive portions 41 are arranged side by side so as to overlap the virtual straight line EL1 for each tooth portion 23. The diameter dimension of the adhesive portion 41 in the core back portion 22 is larger than the diameter dimension of the adhesive portion 41 in the teeth portion 23. Therefore, the number of the adhesive portions 41 in the core back portion 22 is smaller than the number of the adhesive portions 41 in the teeth portion 23, but the area ratios are the same. That is, the ratio of the sum of the areas of each adhesive portion 41 on the core back portion 22 to the total area of ​​the core back portion 22 and the ratio of the sum of the areas of each adhesive portion 41 on the teeth portion 23 to the total area of ​​the teeth portion 23. And are the same.
[0041]
　When considering the total adhesive strength between the electromagnetic steel sheets 40 that overlap each other as the partial strength divided into the core back portion 22 and the teeth portion 23, if the adhesives used are the same, the core back portion 22 The partial adhesive strength and the partial adhesive strength of the tooth portion 23 are the same as each other. However, in this formation pattern 41A, the adhesive strength of the adhesive used for forming the adhesive portion 41 formed on the core back portion 22 is higher than the adhesive strength of the adhesive used for forming the adhesive portion 41 formed on the teeth portion 23. It has become.
[0042]
　As a result, between the electrical steel sheets 40, the average adhesive strength per unit area of ​​the teeth portion 23 by each adhesive portion 41 is lower than the average adhesive strength per unit area of ​​the core back portion 22. More specifically, the average value of the adhesive strength ratio obtained by dividing the partial adhesive strength per unit area of ​​the teeth portion 23 by the partial adhesive strength per unit area of ​​the core back portion 22 is 0.1 or more and less than 1.0. Is within the range of. The upper limit of the average value of the adhesive strength ratio is preferably 0.8, more preferably 0.6. The lower limit of the average value of the adhesive strength ratio is preferably 0.15, more preferably 0.2.
[0043]
　Subsequently, in the case of the formation pattern 41B shown in FIG. 3, the average value of the partial adhesive strength or the average value of the area ratio is different between the core back portion 22 and the teeth portion 23 at each position in the stacking direction of the laminated core. ..
　Specifically, when compared by the average value of the partial adhesive strength, the average value S1 of the partial adhesive strength in the teeth portion 23 is 1 to 15 MPa, and the average value of the partial adhesive strength in the core back portion 22. S2 is 15 to 50 MPa. The average value S1 is lower than the average value S2.
　The lower limit of the average value S1 is preferably 2 MPa, more preferably 3 MPa. The upper limit of the average value S1 is preferably 10 MPa, more preferably 8 MPa. On the other hand, the lower limit of the average value S2 is preferably 20 MPa, more preferably 30 MPa. The upper limit of the average value S2 is preferably 45 MPa, more preferably 40 MPa. However, the point that the average value S1 is lower than the average value S2 remains unchanged.
[0044]
　On the other hand, when compared by the average value of the area ratio, the average value A1 of the area ratio of each adhesive portion 41 in the teeth portion 23 is 10 to 50%, and the area ratio of each adhesive portion 41 in the core back portion 22 is The average value A2 is 50 to 100%. The average value A1 is lower than the average value A2. The average adhesive strength per unit area of ​​each adhesive portion 41 is 5 to 50 MPa, which is common to each position of the tooth portion 23 and the core back portion 22.
　The lower limit of the average value A1 is preferably 10%. The upper limit of the average value A1 is preferably 30%, more preferably 20%. On the other hand, the lower limit of the average value A2 is preferably 60%, more preferably 70%. The upper limit of the average value A2 is preferably 90%, more preferably 80%. However, the point that the average value A1 is lower than the average value A2 remains unchanged.
[0045]
　In this way, by defining the average value of the partial adhesive strength or the average value of the area ratio between the core back portion 22 and the teeth portion 23 as described above, the unit of each adhesive portion 41 in the teeth portion 23 is defined. The average adhesive strength per area can be made lower than the average adhesive strength per unit area of ​​the core back portion 22.
[0046]
　Regarding the arrangement of each adhesive portion 41, in the core back portion 22, a plurality of circular point-shaped adhesive portions 41 are arranged in an annular shape. Each of the adhesive portions 41 of the core back portion 22 is arranged so as to be overlapped on the virtual straight line EL2 connecting the central position in the width direction of each tooth portion 23 and the central axis O of the electromagnetic steel plate 40.
[0047]
　On the other hand, in the teeth portion 23, one adhesive portion 41 is arranged so as to be overlapped on the virtual straight line EL2 for each tooth portion 23. The diameter dimension of the adhesive portion 41 in the core back portion 22 is larger than the diameter dimension of the adhesive portion 41 in the teeth portion 23. As a result, the average value of the partial adhesive strength of the teeth portion 23 is suppressed to be lower than that of the core back portion 22 at each position in the stacking direction of the laminated core. In other words, the average value of the area ratio of the teeth portion 23 is suppressed to be lower than that of the core back portion 22 at each position in the stacking direction of the laminated cores.
　As a result, between the electrical steel sheets 40, the average adhesive strength per unit area of ​​the teeth portion 23 by each adhesive portion 41 is lower than the average adhesive strength per unit area of ​​the core back portion 22.
[0048]
　In the present embodiment, the plurality of electrical steel sheets forming the rotor core 31 are fixed to each other by the caulking 42 (dowel) shown in FIG. However, the plurality of electromagnetic steel sheets forming the rotor core 31 may also have a laminated structure fixed by an adhesive like the stator core 21.
　Further, the laminated cores such as the stator core 21 and the rotor core 31 may be formed by so-called rotating stacking.
Example
[0049]
　Using the manufacturing apparatus 100 shown in FIG. 4, the stator core 21 was manufactured while changing various manufacturing conditions.
　First, the manufacturing apparatus 100 will be described. In the manufacturing apparatus 100, the electromagnetic steel sheet P is sent out from the coil C (hoop) in the direction of the arrow F, and punched a plurality of times by a mold arranged on each stage to gradually form the shape of the electrical steel sheet 40. Then, an adhesive is applied to the lower surface of the electromagnetic steel sheet 40, and the punched electrical steel sheets 40 are laminated and pressure-bonded while raising the temperature to form each bonded portion 41.
[0050]
　As shown in FIG. 4, the manufacturing apparatus 100 is arranged adjacent to the first-stage punching station 110 at a position closest to the coil C and on the downstream side of the punching station 110 along the transport direction of the electrical steel sheet P. A step punching station 120 and an adhesive application station 130 arranged adjacent to the punching station 120 on the downstream side are provided.
　The punching station 110 includes a female die 111 arranged below the electrical steel sheet P and a male die 112 arranged above the electrical steel sheet P.
　The punching station 120 includes a female die 121 arranged below the electrical steel sheet P and a male die 122 arranged above the electrical steel sheet P.
　Due to the flat design of the motor, more punching stations may be located.
[0051]
　The adhesive application station 130 includes an applicator 131 including a plurality of injectors arranged according to an adhesive application pattern. That is, each injector is arranged at a position corresponding to the formation position of each adhesive portion 41 shown in FIG. The nozzle diameters of the injectors are different from each other depending on the size of the adhesive portion 41 to be formed. Further, in the case of the formation pattern 41A, the adhesive flow path leading to the injector for applying the adhesive to the core back portion 22 and the adhesive flow path leading to the other injector for applying the adhesive to the tooth portion 23 are provided. , May be separated. In this case, the chemical component of the adhesive applied to the core back portion 22 and the chemical component of the adhesive applied to the teeth portion 23 can be separated separately.
[0052]
　In addition, instead of the configuration in which a plurality of types of adhesives are simultaneously applied by one adhesive application station 130 as described above, a plurality of (for example, two) adhesive application stations 130 are provided to apply the adhesive. You may try to divide it. In this case, the first adhesive application station 130 applies the first type of adhesive to one of the teeth portion 23 and the core back portion 22, and the second adhesive application station 130 to the other. Apply a second type of adhesive.
[0053]
　The manufacturing apparatus 100 further includes a laminating station 140 at a position downstream of the adhesive application station 130. The laminating station 140 includes a heating device 141, an outer peripheral punching female die 142, a heat insulating member 143, an outer peripheral punching male die 144, and a spring 145.
　The heating device 141, the outer peripheral punched female die 142, and the heat insulating member 143 are arranged below the electromagnetic steel plate P. On the other hand, the outer peripheral punched male die 144 and the spring 145 are arranged above the electromagnetic steel plate P. Reference numeral 21 indicates a stator core.
[0054]
　In the manufacturing apparatus 100 of FIG. 4 having the configuration described above, first, the electromagnetic steel sheet P is sequentially fed from the coil C in the direction of the arrow F. Then, the electromagnetic steel sheet P is punched by the punching station 110. Subsequently, the electromagnetic steel sheet P is punched by the punching station 120. By these punching processes, the shape of the electromagnetic steel sheet 40 having the core back portion 22 and the plurality of tooth portions 23 shown in FIG. 3 is obtained on the electromagnetic steel sheet P. However, since it is not completely punched at this point, the process proceeds to the next step along the arrow F direction. At the adhesive application station 130 in the next step, the adhesive supplied from each of the injectors of the coater 131 is applied in dots. At that time, the amount or type of the adhesive applied is different between the core back portion 22 and the teeth portion 23.
[0055]
　Finally, the electrical steel sheet P is sent out to the laminating station 140, punched out by the outer peripheral punching die 144, and laminated with high accuracy. At the time of this lamination, the electromagnetic steel sheet 40 receives a constant pressing force by the spring 145.
　By sequentially repeating the punching step, the adhesive coating step, and the laminating step as described above, a predetermined number of electromagnetic steel sheets 40 can be stacked. Further, the laminated core formed by stacking the electromagnetic steel sheets 40 in this way is heated to, for example, a temperature of 200 ° C. by the heating device 141 in the case of thermosetting type adhesion. This heating cures the adhesive to form the adhesive portion 41. In the case of a room temperature curable adhesive, the adhesive cures over time to form the adhesive portion 41.
　The stator core 21 is completed by each of the above steps.
[0056]
　Using the manufacturing apparatus 100 described above, No. 1 in Tables 1A and 1B. 1 to No. The stator core 21 shown in No. 13 was manufactured. In addition, for the production of Comparative Example, another apparatus was used to obtain No. The stator core 21 shown in No. 14 was also manufactured.
　First, the plate thickness of the hoop (coil C) was 0.25 mm, which was common. An insulating coating treatment liquid containing a metal phosphate and an acrylic resin emulsion was applied to the hoop and baked at 300 ° C. to form an insulating coating of 0.8 μm on one side.
　Subsequently, a single plate core (electromagnetic steel plate) in which the hoop has a ring shape with an outer diameter of 300 mm and an inner diameter of 240 mm and 18 rectangular tooth portions having a length of 30 mm and a width of 15 mm are provided on the inner diameter side by the manufacturing apparatus 100. 40) was formed by punching.
　Subsequently, while sequentially feeding the punched veneer cores, the adhesive was applied in dots at each position shown in FIG. 3 (excluding Comparative Example No. 14).
[0057]
　The chemical components of the electrical steel sheet 40 used in the production of each stator core 21 are unified as follows. In addition, each component value shows mass%.
　Si: 3.1%
　Al: 0.7%
　Mn: 0.3%
　Residue: Fe and impurities
[0058]
[Table 1A]

[0059]
[Table 1B]

[0060]
　On the other hand, the adhesive for forming each of the adhesive portions 41 was selected from the following and used in appropriate combinations. The specific combinations are as shown in Table 1A.
　Chloroprene rubber adhesive (adhesive strength: 2 MPa)
　cyanoacrylate A adhesive (adhesive strength: 5 MPa)
　anaerobic adhesive (adhesive strength: 15 MPa)
　cyanoacrylate B adhesive (adhesive strength: 24 MPa)
　epoxy A adhesive (adhesive strength) : 32MPa)
　Epoxy B adhesive (adhesive strength: 42MPa)
　Epoxy C adhesive (adhesive strength: 64MPa)
　SGA (adhesive strength: 48MPa)
[0061]
　Further, in the examples of Tables 1A and 1B, the area ratio of the adhesive portion 41 in the teeth portion 23 is equal to the area ratio of the adhesive portion 41 in the core back portion 22. Therefore, as shown in Table 1A, the adhesive strength ratio obtained by dividing the partial adhesive strength of the teeth portion 23 by the partial adhesive strength of the core back portion 22 is equal to the adhesive strength ratio (the above is Comparative Example No. 14). except). The partial adhesive strength indicates the adhesive strength (adhesive strength) of the tooth portion 23 or the core back portion 22.
　After laminating the electromagnetic steel sheets 40 after applying the adhesive, each adhesive portion 41 was formed by heating and curing while pressurizing with a predetermined pressure. A laminated core (stator core 21) was manufactured by repeating the same operation on 130 veneer cores.
[0062]
　On the other hand, No. In the stator core 21 of 14, no adhesive was used for bonding between the electrical steel sheets 40, and the electrical steel sheets 40 were mechanically joined by a caulking portion. This caulking portion was formed on both the core back portion 22 and the teeth portion 23. In addition, the size of the crimped portion in the teeth portion 23 is made smaller than the size of the crimped portion in the core back portion 22. As a result, the partial bonding strength, which is the average bonding strength per unit area of ​​the teeth portion 23, is adjusted to be lower than the partial bonding strength, which is the average bonding strength per unit area of ​​the core back portion 22.
[0063]
　No. 1 produced by the method described above. The rigidity (mechanical strength) of the laminated core was evaluated for each of the laminated cores 1 to 14. The evaluation of the mechanical strength was judged by a tapping sound test. In the "Stiffness of laminated core" column of Table 1B, "excellent" indicates that high mechanical strength is secured, "good" indicates that necessary and sufficient mechanical strength is secured, and "impossible" indicates that necessary and sufficient mechanical strength is secured. Indicates that the minimum required mechanical strength is not sufficient. Here, "excellent" is "1", "good" is "2", "OK" is "3", and "impossible" is "4" or "5".
[0064]

　The outer peripheral end of the core back portion 22 of the laminated core is vibrated in the radial direction by an impact hammer, and the teeth portion 23 in the direction of 180 ° axially with respect to the vibrating source. A modal analysis of vibration was performed with the tip and the center of the core back portion 22 as measurement points. Further, even when the central portion in the radial direction of the core back portion 22 is vibrated in the axial direction by an impact hammer, the tip of the teeth portion 23 and the core back portion in the direction of 180 ° axially with respect to the vibration source are also vibrated. A modal analysis of vibration was performed with the central portion of 22 as the measurement point.
[0065]
　Evaluation (judgment) was performed according to the following criteria. The smaller the value, the higher the mechanical strength by suppressing vibration.
　1 (excellent): Only one or two vibration peaks are detected.
　2 (Good): Several vibration peaks are detected.
　3 (possible): 10 or more vibration peaks are detected depending on the vibration direction.
　4 (impossible): There is a main peak, but 10 or more vibration peaks are detected.
　5 (impossible): There is no main peak, and 10 or more vibration peaks are detected.
[0066]
　Furthermore, the magnetic properties of the laminated core were also evaluated. The magnetic characteristics were evaluated by measuring the iron loss using a rotating iron loss simulator (not shown) having a rotor-shaped detector having a diameter of 239.5 mm. In the "Magnetic characteristics of the teeth portion" column of Table 1B, "excellent" indicates that extremely high magnetic characteristics can be secured. Further, "good" indicates that high magnetic properties are ensured. “Yes” indicates that the necessary and sufficient magnetic characteristics are secured. Further, "impossible" indicates that the magnetic characteristics are lower than the minimum required magnetic characteristics.
[0067]
　Here, first, the value of iron loss measured at a magnetic flux density of 1.5 tesla with respect to the electromagnetic steel sheet 40 before bonding was obtained as a reference value. Subsequently, the iron loss was measured for each of the laminated cores at a magnetic flux density of 1.5 Tesla. Then, the iron loss of each laminated core was divided by the reference value and displayed as 100% to obtain the rate of increase. For example, No. 1B in Table 1B. 1 indicates that the iron loss increase rate is 105%, which indicates that the iron loss has increased by 5% with respect to the reference value.
　When the iron loss increase rate obtained in this way is 5% or less (the numerical value in the table is 105% or less), it is regarded as "excellent", and it is regarded as "excellent" and is more than 5% and 10% or less (the numerical value in the table is more than 105%). 110% or less is "good", more than 10% and 20% or less (values ​​in the table are more than 110% and 120% or less) are "acceptable", and more than 120% (values ​​in the table are more than 120%) are "good". "No".
[0068]
　As shown in Table 1A and Table 1B, No. In the comparative example shown in 9, the partial adhesive strength at the teeth portion 23 was significantly higher than the partial strength at the core back portion 22, so that the magnetic characteristics of the teeth portion 23 were lowered. Further, since the partial adhesive strength at the core back portion 22 was too low, the rigidity of the laminated core also decreased.
　In addition, No. In the comparative examples shown in 10 to 12, since the partial adhesive strength at the teeth portion 23 is higher than the partial strength at the core back portion 22, the magnetic characteristics of the teeth portion 23 are lowered.
　In addition, No. In the comparative example using the crimped portion shown in No. 14, a compressive force was applied to the teeth portion 23 due to the formation of the crimped portion, resulting in a significant decrease in magnetic characteristics.
　On the other hand, No. In Nos. 1 to 8 and 13, it was confirmed that the laminated core had high rigidity (mechanical strength) and high magnetic characteristics, and had desired performance.
[0069]
　Further, FIG. 5 shows the relationship between the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position shown in Table 1A. In FIG. 5, the one below the boundary line B1 at which the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back position are equal is No. It is a comparative example of 9 to 12. No. Although No. 14 is above the boundary line B1, since the electrical steel sheets 40 are bonded to each other by caulking instead of bonding, as described above, a desired characteristic was not obtained particularly in terms of magnetic characteristics.
[0070]
　The boundary line B2 indicates a condition in which the adhesive strength ratio is 0.1. Invention Example No. which is off the left side of the paper surface from the boundary line B2. Although No. 13 was "possible" in terms of both the rigidity and the magnetic characteristics of the laminated core, the coupling strength of the teeth portion 23 was low and the rigidity of the laminated core was sometimes slightly insufficient. I didn't reach it. On the other hand, No. In the examples of the inventions shown in 1 to 8, "excellent" was obtained in either the rigidity or the magnetic property of the laminated core, or the result was similar to that. From this result, it can be said that the adhesive strength ratio is more preferably 0.1 or more in addition to being less than 1.0.
[0071]
　Subsequently, using the manufacturing apparatus 100, No. 1 in Tables 2A and 2B. 15-No. The stator core 21 shown in 29 was manufactured. In this embodiment, although the adhesive used is changed in each case, the adhesive applied to the tooth portion 23 and the adhesive applied to the core back portion 22 are the same. Therefore, the adhesive strength ratios are all unified to 1.00.
　On the other hand, regarding the area ratio, the amount of the adhesive applied to the teeth portion 23 and the amount of the adhesive applied to the core back portion 22 are different, and as a result, the area ratio is changed in each case. rice field.
　In Table 2B, the threshold values ​​of “excellent”, “good”, “possible”, and “impossible” regarding the rigidity of the laminated core are as described in Table 1B. Similarly, the threshold values ​​of "excellent", "good", "possible", and "impossible" regarding the magnetic characteristics of the teeth portion are also as described in Table 1B.
[0072]
[Table 2A]

[0073]
[Table 2B]

[0074]
　No. shown in Table 2A and Table 2B. In the comparative examples of 23 to 25, since the partial adhesive strength at the teeth portion 23 is higher than the partial strength at the core back portion 22, the magnetic characteristics of the teeth portion 23 are deteriorated.
　Further, FIG. 6 shows the relationship between the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position shown in Table 2A. In FIG. 6, the one below the boundary line B3 at which the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position are equal is No. It is a comparative example of 23 to 25.
[0075]
　On the other hand, as shown in Table 2B, No. 1 which is an example of the invention. It was confirmed that in 15 to 22, 26 to 29, the rigidity (mechanical strength) of the laminated core was high and the magnetic characteristics were also high, and the desired performance was obtained.
　In addition, Invention Example No. surrounded by the boundary line B4 forming a square frame. In Nos. 17 to 20 and 27, "excellent" was obtained in both the rigidity and the magnetic characteristics of the laminated core. From this result, the average value S1 of the partial adhesive strength in the teeth portion 23 is 3 to 15 MPa, the average value S2 of the partial adhesive strength in the core back portion 22 is 15 to 50 MPa, and the average value S1 is the average value. It was found that lower than S2 was more preferable.
[0076]
　Subsequently, using the manufacturing apparatus 100, No. 1 in Tables 3A and 3B. 30-No. The stator core 21 shown in 47 was manufactured.
　In Table 3B, the threshold values ​​of “excellent”, “good”, “possible”, and “impossible” regarding the rigidity of the laminated core are as described in Table 1B. Similarly, the threshold values ​​of "excellent", "good", "possible", and "impossible" regarding the magnetic characteristics of the teeth portion are also as described in Table 1B.
[0077]
　No. 30-No. In No. 46, although the adhesive used was changed in each case, the adhesive applied to the tooth portion 23 and the adhesive applied to the core back portion 22 were the same (adhesive having the same chemical composition). Therefore, the adhesive strength ratios are all unified to 1.00. Regarding the area ratio, the amount of the adhesive applied to the teeth portion 23 and the amount of the adhesive applied to the core back portion 22 are different, and as a result, the area ratio is changed in each case. rice field.
[0078]
　On the other hand, No. In 47, the adhesive applied to the teeth portion 23 and the adhesive applied to the core back portion 22 are different. Moreover, this No. In 47, the combination of both adhesives was selected so that the adhesive strength of the adhesive at the teeth portion 23 was lower than the adhesive strength of the adhesive at the core back portion 22. Regarding the area ratio, the amount of the adhesive applied to the teeth portion 23 was smaller than the amount of the adhesive applied to the core back portion 22. As a result, the area ratio in the teeth portion 23 is smaller than the area ratio in the core back portion 22.
[0079]
[Table 3A]

[0080]
[Table 3B]

[0081]
　As a result, No. 1 shown in Tables 3A and 3B. In the comparative examples of 40 to 42, since the partial adhesive strength at the teeth portion 23 is higher than the partial strength at the core back portion 22, the magnetic characteristics of the teeth portion 23 are deteriorated.
　On the other hand, as shown in Tables 3A and 3B, No. 1 which is an example of the invention. It was confirmed that in 30 to 39 and 43 to 47, the rigidity (mechanical strength) of the laminated core was high and the magnetic characteristics were also high, and the desired performance was obtained.
[0082]
　Further, FIG. 7 shows the relationship between the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position shown in Table 3A. In FIG. 7, the one below the boundary line B5 at which the partial adhesive strength at the teeth portion position and the partial adhesive strength at the core back portion position are equal is No. It is a comparative example of 40 to 42.
[0083]
　Further, FIG. 8 shows the relationship between the area ratio at the teeth portion position and the area ratio at the core back portion position shown in Table 3A.
　Invention Example No. 8 surrounded by a boundary line B6 forming a square frame in FIG. In 30 to 37, "excellent" was obtained in both the rigidity and the magnetic characteristics of the laminated core, or the result was similar to that. From this result, the average value A1 of the area ratio of each of the bonded portions in the teeth portion 23 is 10 to 50%, and the average value A2 of the area ratio of each of the bonded portions in the core back portion 22 is 50 to 100%. It was found that it is more preferable that the average value A1 is lower than the average value A2.
[0084]
　The embodiments and examples of the present invention have been described above. However, the technical scope of the present invention is not limited to the above-described embodiments and examples, and various modifications can be made without departing from the spirit of the present invention.
　For example, the shape of the stator core 21 is not limited to the form shown in the above embodiment. Specifically, the dimensions of the outer diameter and inner diameter of the stator core 21, the product thickness, the number of slots, the dimensional ratio between the circumferential direction and the radial direction of the teeth portion 23, the dimensional ratio in the radial direction between the teeth portion 23 and the core back portion 22, etc. Can be arbitrarily designed according to the desired characteristics of the rotating electric machine.
　In the rotor 30 of the above embodiment, a pair of permanent magnets 32 form one magnetic pole, but the present invention is not limited to this embodiment. For example, one permanent magnet 32 ​​may form one magnetic pole, or three or more permanent magnets 32 may form one magnetic pole.
[0085]
　In the above embodiment, the permanent magnet field type electric machine has been described as an example of the rotary electric machine 10, but the structure of the rotary electric machine 10 is not limited to this as illustrated below, and is not exemplified below. Various known structures can also be adopted.
　In the above embodiment, the permanent magnet field type motor has been described as an example of the rotary electric machine 10, but the present invention is not limited to this. For example, the rotary electric machine 10 may be a reluctance type electric machine or an electromagnet field type electric machine (winding field type electric machine).
　In the above embodiment, the synchronous motor has been described as an example of the AC motor, but the present invention is not limited to this. For example, the rotary electric machine 10 may be an induction motor.
　In the above embodiment, the AC motor has been described as an example of the rotary electric machine 10, but the present invention is not limited to this. For example, the rotary electric machine 10 may be a DC motor.
　In the above embodiment, the rotary electric machine 10 has been described by taking an electric machine as an example, but the present invention is not limited to this. For example, the rotary electric machine 10 may be a generator.
[0086]
　In addition, it is possible to replace the components in the embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.
Industrial applicability
[0087]
　According to the present invention, it is possible to provide an adhesive laminated core for a stator having an adhesive structure that does not adversely affect magnetic characteristics while increasing mechanical strength, and a rotary electric machine provided with the adhesive laminated core for the stator. Therefore, the industrial applicability is great.
Code description
[0088]
　10 Rotary machine
　21 Adhesive laminated core for stator
　22 Core back part
　23 Teeth part
　40 Electromagnetic steel plate
　41 Adhesive part
The scope of the claims
[Claim 1]
　A plurality of electromagnetic steel plates having a core back portion and a teeth portion and laminated coaxially, and a plurality of adhesive portions for adhering between the electromagnetic steel plates are provided, and the adhesive portions are provided
　between the electromagnetic steel plates. in accordance, partial adhesion strength is the average bond strength per unit area in the tooth portion, the core back is an average bond strength per unit area in the portion bonded lower than the strength
adhesive lamination core stator, characterized in that ..
[Claim 2]
　The
claim is characterized in that the average value of the adhesive strength ratio obtained by dividing the partial adhesive strength in the teeth portion by the partial adhesive strength in the core back portion is in the range of 0.1 or more and less than 1.0. The adhesive laminated core for a stator according to 1.
[Claim 3]
　The average value S1 of the partial adhesive strength in the teeth portion is 1 to 15 MPa,
　the average value S2 of the partial adhesive strength in the core back portion is 15 to 50 MPa, and the
　average value S1 is the average value S2. The
adhesive laminated core for a stator according to claim 1 or 2, characterized in that it is lower than .
[Claim 4]
　Each of the adhesive portions is made of an adhesive having the same chemical component,
　the average value A1 of the area ratio of each of the adhesive portions in the teeth portion is 10 to 50%, and
　the area ratio of each of the adhesive portions in the core back portion. The adhesive laminated core for a stator according to claim 1 or 2 ,
　wherein the average value A2 of A2 is 50 to 100%, and the average value A1 is lower than the average value A2
.
[Claim 5]
　The
adhesive laminated core for a stator according to any one of claims 1 to 4, wherein the average thickness of each of the adhesive portions is 1.0 μm to 3.0 μm .
[Claim 6]
　The
adhesive laminated core for a stator according to any one of claims 1 to 5, wherein the average tensile elastic modulus E of each of the bonded portions is 1500 MPa to 4500 MPa .
[Claim 7]
　The
adhesive laminated core for a stator according to any one of claims 1 to 6, wherein each of the adhesive portions is a room temperature adhesive type acrylic adhesive containing SGA made of an elastomer-containing acrylic adhesive. ..
[Claim 8]
　A rotary electric machine comprising the adhesive laminated core for a stator according to any one of claims 1 to 7.