JP2018029422A - Dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamo-electric machine capable of achieving higher torque while avoiding up-sizing.SOLUTION: A motor includes a stator unit and a rotor unit. The stator unit has multiple core coil sets 20, and multiple core coil sets 21. Each of the multiple core coil sets 20 has a stator core 200, a support member, a bobbin 202, and a coil 203. The stator core 200 is U-shaped or C-shaped in the side view from the circumferential direction, and the coil 203 is wound around the trunk thereof. End faces 200a, 200b of the stator core 200 face radially inward. Meanwhile, the stator core 210 of a core coil set 21 extends in the X direction, and end faces 210a, 210b face outward in X direction. The stator core 200 is composed of amorphous soft magnetic material, and is a laminate formed by laminating multiple sheet materials having board thickness of 0.05 mm or less.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a rotating electrical machine, and more particularly to a configuration of a stator unit.

  A rotating electrical machine such as an electric motor has a rotor and a stator arranged with a gap therebetween. The type in which the permanent magnet of the rotor and the stator core of the stator face each other in the radial direction perpendicular to the rotation axis is a radial gap type rotating electric machine, and the type that faces the direction along the rotation axis is an axial gap type rotating electric machine. It is.

  Here, a composite type rotating electrical machine of a radial gap type and an axial gap type has also been researched and developed (Patent Document 1). The rotating electrical machine disclosed in Patent Document 1 includes a plurality of first stator cores arranged so as to surround the rotor from the outside in the radial direction, and a plurality of annularly arranged so as to face one main surface of the rotor in the axial direction. The second stator core is provided. A coil is wound around each stator core. In the rotor, a plurality of first permanent magnets are disposed at locations facing the first stator core, and a plurality of second permanent magnets are disposed at locations facing the second stator core.

  In the rotating electrical machine disclosed in Patent Document 1, high torque is being obtained by using a composite type of a radial gap type and an axial gap type.

Japanese Patent Application Laid-Open No. 07-161127

  However, in motors and the like, a further increase in torque is required while avoiding an increase in size, but it is considered that it is difficult to realize this demand with conventional techniques including the technique disclosed in Patent Document 1. That is, in the technique disclosed in Patent Document 1, a plurality of first stator cores are disposed on the outer peripheral portion surrounding the rotation shaft, and the coil is wound around the outer peripheral portion. For this reason, with the configuration disclosed in Patent Document 1, when trying to increase the number of coil turns in order to further increase the torque, the positions of the plurality of first stator cores must be changed radially outward. I must. Therefore, in the technique disclosed in Patent Document 1, an increase in size is inevitable if an attempt is made to further increase the torque.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotating electrical machine capable of further increasing torque while avoiding an increase in size.

  A rotating electrical machine according to an aspect of the present invention includes a stator and a rotor.

  The stator includes a plurality of first stator cores, a plurality of first coils, a plurality of second stator cores, and a plurality of second coils.

  The plurality of first stator cores are arranged in the circumferential direction at intervals.

  The plurality of first coils are wound around each of the plurality of first stator cores.

  The plurality of second stator cores are arranged in the circumferential direction in a state of being spaced apart from each other radially inward of the plurality of first stator cores.

  The plurality of second coils are wound around each of the plurality of second stator cores.

  When each of the plurality of first stator cores is viewed from the circumferential side, the first body core extends in the axial direction from the first body portion along the axial direction and one of the first body portions, and extends in the radial direction. A first arm portion that is bent, and the first end surface that is an end surface of the first arm portion faces radially inward.

  Each of the plurality of first coils is wound around the first body portion of each of the plurality of first stator cores.

  Each of the plurality of second stator cores includes a second body portion extending in the axial direction and a second body portion extending in the axial direction from one of the second body portions when viewed from the circumferential side. And a second end face that is an end face of the second arm part faces outward in the axial direction.

  Each of the plurality of second coils is wound around the second body portion of each of the plurality of second stator cores.

  The rotor has a rotating shaft, a plurality of first permanent magnets, and a plurality of second permanent magnets.

  The plurality of first permanent magnets rotate integrally with the rotation shaft, and are arranged to face the first end surfaces of the plurality of first stator cores with a gap in the radial direction.

  The plurality of second permanent magnets rotate integrally with the rotation shaft, and are arranged to face the second end surfaces of the plurality of second stator cores with a gap in the axial direction.

  In the rotating electrical machine according to this aspect, the first end faces of the plurality of first stator cores and the plurality of first permanent magnets face each other in the radial direction (radial direction), and the second end faces of the plurality of second stator cores Each of the plurality of second permanent magnets is opposed to the axial direction (axial direction). That is, the rotating electrical machine according to this aspect is a combined rotary electrical machine of a radial gap type and an axial gap type, and can achieve high torque.

  Moreover, in the rotary electric machine which concerns on this aspect, it has the 1st trunk | drum by which a 1st coil is wound about each of several 1st stator cores, and the 1st arm part bent by radial direction. Since it becomes the form which becomes, a 1st trunk | drum is arrange | positioned in a radial direction outer side rather than the 1st end surface facing a 1st permanent magnet. Therefore, even when the number of turns of the first coil is increased, the size of other components such as the rotor is not increased.

  Therefore, in the rotating electrical machine according to this aspect, it is possible to increase the torque while avoiding an increase in size.

  In the rotating electric machine according to another aspect of the present invention, in the above configuration, each of the plurality of first stator cores is a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated.

  In the rotating electrical machine according to this aspect, since a laminated body of thin plate materials made of amorphous soft magnetic material is used as the plurality of first stator cores, the iron loss relative to the stator cores using directional electromagnetic steel plates and silicon steel plates. (Vortex loss) can be greatly reduced. Therefore, it is possible to increase the torque.

  In the rotating electric machine according to another aspect of the present invention, in the above configuration, the thickness of the thin plate material made of the amorphous soft magnetic material is 0.05 mm or less.

  In the rotating electrical machine according to this aspect, the thickness of the thin plate material constituting the first stator core is made extremely thin as 0.05 mm or less, compared with the conventional technique using a silicon steel plate whose lower limit is 0.2 mm. The eddy loss can be reduced. Therefore, in this aspect, it is further advantageous to increase the torque while avoiding an increase in size.

  In the rotating electrical machine according to another aspect of the present invention, in each of the plurality of first stator cores, the stacking direction of the stacked body is a radial direction in the first body portion, and the stacking at the first end surface is performed. The interface extends in a direction perpendicular to both the axial direction and the radial direction.

  In the rotating electrical machine according to this aspect, the flow of magnetic flux between the first stator core and the rotor can be made smooth by making each of the stacked forms of the plurality of first stator cores as described above. Therefore, this aspect is advantageous for achieving high torque.

  In the rotating electric machine according to another aspect of the present invention, in the above-described configuration, each of the plurality of first stator cores extends in the axial direction from the other of the first body portions and is bent in the radial direction. And the third end surface, which is the end surface of the third arm portion, faces radially inward, and the rotor has a gap in the radial direction with respect to the third end surfaces of the plurality of first stator cores. It further has a plurality of third permanent magnets that are arranged to face each other with a gap between them.

  In the rotating electrical machine according to this aspect, the facing area between the end face of the stator core in the stator and the permanent magnet in the rotor can be further increased, which is advantageous for achieving high torque. In addition, since the third end surface of the third arm portion in each of the plurality of first stator cores is used and the third end surface is also directed radially inward, an increase in the size of the rotating electrical machine can be avoided. Therefore, this aspect is advantageous for increasing torque while avoiding an increase in size.

  In the rotating electrical machine according to another aspect of the present invention, in the above configuration, the rotor includes a first rotor and a second rotor that rotate integrally with the rotation shaft, and the plurality of first permanent magnets are the first rotor. The plurality of third permanent magnets are provided in a state aligned with the outer peripheral surface of the second rotor. In the rotating electrical machine according to this aspect, in each of the plurality of first stator cores, the first end surface is configured by a curved surface that is centered on the rotation axis and that extends along an outer peripheral surface of the first rotor. An end surface is formed of a curved surface that is centered on the rotation axis and that follows the outer peripheral surface of the second rotor.

  In the rotating electrical machine according to this aspect, the first end surface and the third end surface of each of the plurality of first stator cores are configured by the curved surfaces in the above-described form, so the first permanent magnet and the third of the rotor It is possible to reduce the gap between the permanent magnet and the first end face and the third end face of the first stator core and to make the gap uniform in the circumferential direction.

  Therefore, in this aspect, it is further advantageous to increase the torque.

  In the rotating electric machine according to another aspect of the present invention, in the above configuration, each of the plurality of second stator cores is a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated.

  In the rotating electrical machine according to this aspect, each of the plurality of second stator cores is also a laminated body formed by laminating a plurality of thin plate materials made of amorphous soft magnetic material, so that the torque can be increased while avoiding an increase in the size of the rotating electrical machine. It is more advantageous to plan.

  In the rotating electric machine according to another aspect of the present invention, in the configuration described above, the stator is radially inward of the plurality of first stator cores and spaced axially outward from the second stator core. Each of the plurality of third stator cores, and a plurality of third stator cores wound around each of the plurality of third stator cores, and each of the plurality of third stator cores. Has a fifth end surface that is one end surface facing the second end surface with a gap in the axial direction (radial direction), and the rotor is opposed to the fifth end surface of the plurality of third stator cores. And a plurality of fifth permanent magnets arranged to face each other with a gap in the axial direction (radial direction).

  In the rotating electrical machine according to this aspect, the stator includes a plurality of third stator cores, and the rotor includes a plurality of fifth permanent magnets opposed to the fifth end surfaces of the plurality of third stator cores. it can.

  The rotating electrical machine according to another aspect of the present invention has the above-described configuration, wherein each of the plurality of second stator cores includes a fourth arm portion extending in the axial direction from the other of the second body portions, A fourth end surface, which is an end surface of the fourth arm portion, faces outward in the axial direction, and the rotor is disposed to face the fourth end surfaces of the plurality of second stator cores with a gap therebetween. And a plurality of fourth permanent magnets.

  In the rotating electrical machine according to this aspect, since the plurality of fourth permanent magnets in the rotor face the fourth end surfaces of the plurality of second stator cores in the axial direction (axial direction), the torque can be further increased. Can be achieved.

  In the rotating electric machine according to another aspect of the present invention, in the configuration described above, the stator is radially inward of the plurality of first stator cores and spaced axially outward from the second stator core. And a plurality of fourth stator cores arranged in the circumferential direction in a state where they are in a state of being wound, and a plurality of fourth coils wound around each of the plurality of fourth stator cores. In the rotating electrical machine according to this aspect, each of the plurality of fourth stator cores has a sixth end surface that is one end surface thereof facing the fourth end surface with a gap in the axial direction (axial direction), The rotor further includes a plurality of sixth permanent magnets arranged to face the sixth end surfaces of the plurality of third stator cores with a gap in an axial direction (axial direction).

  In the rotating electrical machine according to this aspect, since the plurality of sixth permanent magnets in the rotor face the sixth end surfaces of the plurality of fourth stator cores in the axial direction (axial direction), the torque can be further increased. Can be achieved.

  In the rotating electric machine according to another aspect of the present invention, in the above configuration, the stator further includes a back yoke having a ring shape with the rotation axis as a center, and each of the plurality of first stator cores includes the first stator core. A first connecting portion extending in the axial direction from the other of the one body portion and connected to the back yoke is further provided. Further, in the rotating electrical machine according to this aspect, each of the plurality of second stator cores is a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated, and when viewed from the side in the circumferential direction, A second body portion extending in the axial direction, a second arm portion extending in the axial direction from one of the second body portions, and extending in the axial direction from the other of the second body portions, to the back yoke A second connection portion connected.

  In the rotating electrical machine according to this aspect, the configuration in which the first connection portions of the plurality of first stator cores and the second connection portions of the plurality of second stator cores are connected to the back yoke may be adopted as described above. The vortex loss can be greatly reduced. Therefore, high torque can be achieved while avoiding an increase in size.

  In the rotating electric machine according to another aspect of the present invention, in the above configuration, each of the plurality of first coils is a coil configured by edgewise winding of a rectangular wire. By adopting a coil configured by winding edgewise of a rectangular wire in this way, a high coil space factor can be realized, which is suitable for increasing torque while avoiding an increase in size.

  The rotating electrical machine according to each aspect described above can achieve high torque while avoiding an increase in size.

1 is a schematic development view showing a configuration of a motor 1 according to a first embodiment of the present invention. 1 is a schematic perspective view showing an external configuration of a stator unit 2 in a motor 1. FIG. FIG. 4 is a schematic development view showing an arrangement form of core coil sets 20 and 21 in the stator unit 2. FIG. 4 is a schematic development view showing one process related to the formation of the stator unit 2. FIG. 4 is a schematic development view showing one process related to the formation of the stator unit 2. 3 is a schematic cross-sectional view showing a configuration of a stator unit 2. FIG. (A) is a schematic perspective view which shows the structure of the core coil set 20, (b) is a schematic perspective view which shows the structure of the core coil set 21. FIG. It is a figure which shows the formation process of the stator core 200 in order, Comprising: (a) is a schematic diagram which shows the formation process of the wound body 2001, (b) is a schematic diagram which shows the formation process of the core element | base_body 2002. . (A) is a schematic diagram which shows the process which concerns on formation of end surface 200a, 200b, (b) is a schematic diagram which shows the process which concerns on fixation of the supporting member 201. FIG. (A) is a schematic diagram showing a process related to the formation of the bobbin 202, and (b) is a schematic diagram showing a process related to the formation of the coil 203. (A)-(e) is a schematic diagram which shows the formation process of the 2nd rotor 31 in the rotor unit 3 in order. (A) and (b) are schematic views for illustrating the flow of magnetic flux _MF 1, MF ₂ at the time of driving the motor 1. (A) and (b) are schematic views for illustrating the flow of magnetic flux MF ₂ at the time of driving the motor 1. It is a schematic cross section which shows a partial structure of the stator unit 6 with which the motor which concerns on 2nd Embodiment of this invention is provided. (A) is a schematic cross section which shows a partial structure of the stator unit 7 with which the motor which concerns on 3rd Embodiment of this invention is equipped, (b) is a stator with which the motor which concerns on 4th Embodiment of this invention is equipped. 3 is a schematic cross-sectional view showing a partial configuration of a unit 9. FIG. (A) And (b) is a schematic diagram which shows a partial structure of the core coil set with which the motor which concerns on 5th Embodiment of this invention is provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The form described below is one embodiment of the present invention, and the present invention is not limited to the following form except for the essential configuration.

[First Embodiment]
1. Configuration The configuration of the motor 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic development view showing the configuration of the motor 1.

  As shown in FIG. 1, the motor 1 includes a stator unit 2, a rotor unit 3, and motor cases 4 and 5.

  The stator unit 2 has a ring shape, and is provided with a coolant supply port 2a that protrudes upward from the outer peripheral surface and a coolant discharge port 2b that protrudes downward from the outer peripheral surface. In the stator unit 2, twelve core coil sets 20 that are independent for each slot are arranged in the circumferential direction. In addition, the stator unit 2 according to this embodiment has a plurality of core coil sets. A detailed configuration of the stator unit 2 will be described later.

  The rotor unit 3 includes two rotors 30 and 31 and a rotation shaft 32. In the rotor unit 3, the first rotor 30 and the second rotor 31 are disposed so as to sandwich the stator unit 2 in the X direction.

  In the rotor unit 3, the rotary shaft 32 is engaged with the engagement holes 31 a of the first rotor 30 and the second rotor 31. As a result, in the rotor unit 3, the first rotor 30 and the second rotor 31 rotate around the axis of the rotation shaft 32 integrally with the rotation shaft 32.

  Each of the motor cases 4 and 5 is integrally formed with ring-shaped peripheral walls 4c and 5c and disk-shaped end walls 4d and 5d, and has a circular shallow dish shape as a whole. Insertion holes 4a and 5a are formed in the central portions of the end walls 4d and 5d in the motor cases 4 and 5, respectively. The insertion holes 4a and 5a are holes through which the rotary shaft 32 in the rotor unit 3 is inserted. The motor cases 4 and 5 are made of a metal material such as an aluminum alloy, for example.

  Further, on the inner surface side of the motor cases 4, 5, a plurality of recessed grooves 5 b are provided in the outer edge portion. In addition, about the recessed groove | channel of the motor case 4, illustration is abbreviate | omitted. The recess grooves 5 b of the motor cases 4 and 5 are grooves for receiving the insertion of each part of the core coil set 20 in the stator unit 2. That is, by assembling the motor cases 4 and 5, the plurality of core coil sets 20 in the stator unit 2 are accurately positioned and securely fixed.

  Note that the outer peripheral surface of the stator unit 2 (the outer peripheral surface from which the coolant supply port 2a and the coolant discharge port 2b protrude) is sandwiched between the ends of the motor case 4 and the motor case 5. Exposed outside.

2. Configuration of Stator Unit 2 Next, the configuration of the stator unit 2 in the motor 1 will be described with reference to FIGS. FIG. 2 is a schematic perspective view showing the configuration of the stator unit 2, and FIG. 3 is a schematic cross-sectional view showing the arrangement of the plurality of core coil sets 20 and the plurality of core coil sets 21 in the stator unit 2.

  As shown in FIG. 2, the stator unit 2 includes 12 core coil sets 20, 12 core coil sets 21, an outer ring 22, an inner ring 23, a pair of inner diameter side fixing plates 24, And a pair of outer diameter side fixing plates 26 and 27.

  As shown in FIG. 3, the twelve core coil sets 20 are arranged in a state of being spaced apart from each other in the circumferential direction. Each of the twelve core coil sets 20 includes a stator core 200 that is U-shaped or C-shaped in a side view from the circumferential direction, and a coil 203 that is wound around the stator core 200.

  Returning to FIG. 2, the end surfaces of the stator cores of the 12 core coil sets 21 are exposed from the window portions 24 a opened in the pair of inner diameter side fixed plates 24. FIG. 2 shows a form in which the end surfaces of the stator cores of the twelve core coil sets 21 are exposed from the window portion 24a opened in the inner diameter side fixing plate 24. A similar window is also opened, and the other end face of the stator core of the 12 core coil sets 21 is exposed.

  As shown in FIG. 3, the twelve core coil sets are arranged in a state of being arranged in the circumferential direction, and a stator core 210 that extends linearly (I-shaped) in the X direction (axial direction) and a winding around the stator core 210 are arranged. And a coil 213 that is rotated.

  Returning to FIG. 2, the outer peripheral ring 22 is provided with a coolant supply port 2a protruding upward in the Z direction and a coolant discharge port 2b protruding downward in the Z direction. The coolant supply port 2 a and the coolant discharge port 2 b are both cylindrical, and an inner hole (not shown) is inserted through the outer ring 22.

  In the pair of inner diameter side fixing plates 24 and the pair of outer diameter side fixing plates 26 and 27, the outer periphery and the inner periphery are engaged in a liquid-tight state.

  As shown in FIG. 3, in the stator unit 2, the twelve core coil sets 20 and the twelve core coil sets 21 are arranged concentrically around the central axis extending in the X direction.

3. Method for Forming Stator Unit 2 A method for forming the stator unit 2 will be described with reference to FIGS. 4 and 5 are schematic views showing a part of the process of forming the stator unit 2 in an extracted manner. FIG. 6 is a schematic cross-sectional view showing the configuration of the formed stator unit 2.

  As shown in FIG. 4, first, 12 core coil sets 21 are attached to the inner diameter side fixing plate 25. In each of the twelve core coil sets 21, the stator core 210 is extended to both sides in the X direction from the coil 213, and the inner diameter side fixed plate 25 is engaged with each window portion in a liquid-tight state. It is attached. In addition, it is good also as reinforcing the liquid-tight state of the edge of a window part, and the front-end | tip part of the stator core 210 by application | coating of an adhesive agent.

  Next, with respect to the twelve core coil sets 21 arranged in an annular shape, the inner peripheral ring 23 is inserted on the inner peripheral side, and the intermediate ring 28 is inserted on the outer peripheral side. The inner ring 23 and the intermediate ring 28 are arranged with a gap in the radial direction with respect to the coils 213 of the twelve core coil sets 21.

  Next, the inner diameter side fixing plate 24 is attached to the twelve core coil sets 21 from the side opposite to the inner diameter side fixing plate 25 in the X direction. When attaching the inner diameter side fixing plate 24, the end surface 210 a of the stator core 210 of each core coil set 21 is exposed from the window portion 24 a opened in the inner diameter side fixing plate 24. Note that the inner diameter side fixed plate 24 also engages with the tip portion of the stator core of the core coil set 21 in a liquid-tight state.

  Further, the inner diameter side fixing plate 24 and the inner diameter side fixing plate 25 and the end faces of the inner peripheral ring 23 and the intermediate ring 28 are joined in a liquid-tight state using, for example, an adhesive. The inner ring 23 and the intermediate ring 28 are made of, for example, an aluminum alloy.

  The inner diameter side fixing plates 24 and 25 are made of, for example, a ceramic material. Each of the inner diameter side fixing plates 24 and 25 is formed by integrally forming a ring-shaped annular portion 24b and a plurality of tooth portions 24c and 25c projecting radially outward from the annular portion 24b. It is. The number of tooth portions 24c, 25c in the inner diameter side fixed plates 24, 25 is twelve. This is because each tooth part 24c, 25c is inserted between the core coil sets 20 adjacent in the circumferential direction. The outer periphery of the annular portions 24b and 25b and the sides of the tooth portions 24c and 25c engage with the stator core in the core coil set 20 in a liquid-tight state. However, the liquid-tight state may be reinforced using an adhesive.

  As shown in a portion surrounded by a two-dot chain line in FIG. 4, at the tip portion of each tooth portion 24 c, 25 c of the inner diameter side fixing plates 24, 25, a portion with a small thickness (single cylinder) Attached portions 24d and 25d) are provided.

  Next, as shown in FIG. 5, twelve core coil sets 20 are arranged on the outer peripheral portions of the pair of inner diameter side fixing plates 24 and 25 to which the core coil set 21 and the like are assembled. The arrangement of the core coil set 20 is between the tooth portions 24c and 25c in the inner diameter side fixing plates 24 and 25 as described above.

  And with respect to the core coil set 20 arrange | positioned in the outer peripheral part of a pair of inner diameter side fixing plates 24 and 25, outer diameter side fixing plates 26 and 27 and the outer periphery ring 22 (illustration is abbreviate | omitted in FIG. 5). Install.

  The outer diameter side fixing plates 26 and 27 are also made of, for example, a ceramic material, and each of the outer diameter side fixing plates 26 and 27 is formed in a radial direction from the ring-shaped annular portions 26b and 27b and the annular portions 26b and 27b. A plurality of teeth 26c and 27c protruding inward are integrally formed. The number of teeth 26c, 27c in the outer diameter side fixing plates 26, 27 is also twelve. Similarly to the above, in the outer diameter side fixing plates 26, 27, the tooth portions 25c, 27c are inserted between the core coil sets 20 adjacent in the circumferential direction, and the inner periphery of the annular portions 26b, 27b and the tooth portions 26c, The side of 27c engages with the stator core in the core coil set 20 in a liquid-tight state. Again, the liquid-tight state can be reinforced using an adhesive.

  As shown in a portion surrounded by a two-dot chain line in FIG. 5, a part (thin piece) with a partly thin plate thickness is formed at the tip of each tooth portion 26 c, 27 c of the outer diameter side fixing plates 26, 27. Body portions 26d, 27d) are provided.

  As shown in FIG. 6, in the stator unit 2, the single cylinder portions 24 d and 25 d of the inner diameter side fixing plates 24 and 25 and the single cylinder portions 26 d and 27 d of the outer diameter side fixing plates 26 and 27 are: They are engaged in a phase-out state and are engaged with each other in a liquid-tight state. The point which can reinforce a liquid-tight state using an adhesive is the same as the above.

  In addition, the outer diameter side fixing plates 26 and 27 and the end surface of the outer peripheral ring 22 are joined using, for example, an adhesive. The outer peripheral ring 22 is also made of, for example, an aluminum alloy.

  Further, as shown in FIG. 6, gaps 2c and 2d are opened between the coil 203 in the core coil set 20, the intermediate ring 28, and the outer ring 22 to provide a coolant flow path. . Although not shown, the gaps 2c, 2d, and 2e communicate with each other, and the cooling liquid supplied from the cooling liquid supply port 2a can cool the coils 203 and 213 of the core coil sets 20 and 21 and the like. It is like that.

  By thus cooling the core coil sets 20 and 21, the coils 203 and 213 can be protected from heat due to copper loss, iron loss, mechanical loss, and the like.

  In addition, for the joining of the inner diameter side fixing plates 24, 25 and the outer diameter side fixing plates 26, 27, joining using an adhesive or joining by welding (welding by heat or ultrasonic wave) can be adopted. Further, in addition to the bonding using the adhesive, the inner diameter side fixing plates 24 and 25 and the outer diameter side fixing plates 26 and 27 and the outer ring 22 and the inner ring 23 and the intermediate ring 28 are welded (heat, It is also possible to employ a bonding method using ultrasonic welding).

4). Configuration of Core Coil Sets 20 and 21 (1) Configuration of Core Coil Set 20 The configuration of the core coil set 20 will be described with reference to FIG.

  As illustrated in FIG. 7A, the core coil set 20 includes a stator core 200, a support member 201, a bobbin 202, and a coil 203. The stator core 200 according to the present embodiment is U-shaped or C-shaped in a side view from the Y direction. The end faces 200a and 200b on both sides of the stator core 200 are each subjected to curved surface processing on a YZ plane having a center in the Z direction. This is along the outer peripheral surfaces of the first rotor 30 and the second rotor 31, and the distance between the end surfaces 200 a and 200 b of the stator core 200 and the permanent magnets of the first rotor 30 and the second rotor 31 is set. This is to make it narrower.

  The support member 201 is made of an electrically insulating material (for example, a ceramic material), and is joined to the upper and lower main surfaces of the central portion (body portion 200c) in the X direction of the stator core 200. For example, an adhesive is used to join the support member 201 to the stator core 200.

  The bobbin 202 is formed so as to cover the four main surfaces with respect to the body portion of the stator core 200. The bobbin 202 is made of an electrically insulating material (for example, an electrically insulating resin material), and is provided so as to be substantially flush with the end surface of the support member 201 in the X direction.

  As a material for forming the bobbin 202, a material in which glass fibers or fillers are dispersed can be used in consideration of heat dissipation, mechanical strength, and the like.

  The coil 203 is wound around the bobbin 202. In the present embodiment, a coil 203 formed by edgewise winding of a rectangular wire is employed. However, it is also possible to appropriately employ a coil using a coil wire having a circular cross section or an oval cross section.

  In the present embodiment, the stator core 200 is a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated. The plate thickness of each thin plate material is 0.05 mm or less (for example, 0.025 mm). The lamination direction of the thin plate materials is the Z direction at the body portion 200c. In other words, the interface between the thin plate materials extends in a direction orthogonal to both the X direction and the Z direction.

  In the stator core 200, the arm portions on both sides of the body portion 200c are bent downward in the Z direction (inward in the radial direction), and the end surfaces 200a and 200b are formed to face downward in the Z direction (inward in the radial direction). ing.

(2) Configuration of Core Coil Set 21 The configuration of the core coil set 21 will be described with reference to FIG.

  As shown in FIG. 7B, the core coil set 21 includes a stator core 210, a support member 211, a bobbin 212, and a coil 213. The stator core 210 according to the present embodiment has an inverted trapezoidal shape when viewed from the front in the X direction.

  The stator core 210 extends in the X direction, and both end portions thereof protrude from the support member 211, the bobbin 212, and the coil 213. The end surface of the stator core 210 is a plane parallel to a virtual plane along the YZ plane.

  The support member 211 is made of an electrically insulating material (for example, a ceramic material), and is joined to the upper and lower main surfaces of the stator core 210. For example, an adhesive is used to join the support member 211 to the stator core 210.

  The bobbin 212 is formed so as to cover the four main surfaces of the stator core 210. The bobbin 212 is made of an electrically insulating material (for example, an electrically insulating resin material), and is provided so as to be substantially flush with the end surface of the support member 211 in the X direction.

  Similar to the core coil set 20 described above, as a material for forming the bobbin 212, a material in which glass fibers or fillers are dispersed can be used in consideration of heat dissipation and mechanical strength.

  The coil 213 is wound around the bobbin 212. In the present embodiment, a coil 213 configured by edgewise winding of a rectangular wire is employed. However, it is also possible to appropriately employ a coil using a coil wire having a circular cross section or an oval cross section.

  The stator core 210 is also a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated. The plate thickness of each thin plate material is 0.05 mm or less (for example, 0.025 mm). The laminating direction of the thin plate materials is the Z direction (radial direction) at the body portion (center portion in the X direction).

4). Method for Forming Core Coil Sets 20 and 21 A method for forming the core coil sets 20 and 21 will be described with reference to FIGS. Hereinafter, a method for forming the core coil set 20 will be described. About the formation method of the core coil set 21, since it can form by the method substantially the same as the core coil set 20, description below is abbreviate | omitted.

(1) Method of Forming Stator Core 200 First, as shown in FIG. 8A, a strip-shaped thin plate material 2000 is wound around the outer periphery of a rounded quadrangular winding die 500 in a plan view, and a wound body 2001. Form. Here, the strip-shaped thin plate material 2000 is made of an amorphous soft magnetic material and has a plate thickness of 0.05 mm or less (for example, 0.025 mm).

  The wound body 2001 is bonded between the thin plate materials 2000 using a vacuum impregnation bonding method. By using the vacuum impregnation bonding method in this way, it is effective to increase the mechanical strength of the stator core 200 and to form the stator core 200 that can sufficiently withstand motor rotation at high torque.

  Next, as illustrated in FIG. 8B, the wound body 2001 that has been hardened using the vacuum impregnation bonding method is cut along one cutting line to form two core element bodies 2002.

  In this embodiment, the two core element bodies 2002 are cut out from the wound body 2001. However, one core element body may be cut out, and three or more core element bodies may be cut out. You can also.

  Next, as shown in FIG. 9A, grinding is performed on both end faces of the core body 2002. The grinding process for the end face is for forming a curved surface having a curvature radius R having a center in the Z direction. The curvature radius R is a curvature corresponding to the outer diameter of the corresponding first rotor 30 and second rotor 31. Specifically, the radius of curvature R is a value obtained by adding a gap to each radius of the first rotor 30 and the second rotor 31.

  By the above grinding process, the stator core 200 having the curved end surfaces 200a and 200b is completed. Here, the stator core 1000 has a U-shaped or C-shaped appearance in a side view from the Y direction.

  In addition, regarding the stator core 200, a central portion along the X direction is referred to as a trunk portion 200c, and both sides of the trunk portion 200c in the X direction and arc-shaped portions are referred to as arm portions 200d and 200e. In other words, the arm portion 200d is a portion that extends in the X direction from one side of the trunk portion 200c and is bent downward in the Z direction, and the arm portion 200e extends in the X direction from the other side of the trunk portion 200c. It is a part that is bent downward in the direction.

(2) Method for Forming Support Member 201 and Bobbin 202 A method for forming the support member 201 and the bobbin 202 on the completed stator core 200 will be described with reference to FIGS. 9B and 10A.

  As shown in FIG. 9B, the support member 201 is attached to the upper and lower surfaces in the Z direction with respect to the body portion 200 c of the stator core 200. The support member 201 is made of an electrically insulating material (for example, a ceramic material). As described above, an adhesive can be used for attaching the support member 201. The support member 201 may be attached to both sides in the Y direction of the body portion 200c of the stator core 200. This will be described later.

  Next, as shown in FIG. 10A, the bobbin 202 is formed so as to surround the four sides with respect to the body portion 200 c of the stator core 200. As a forming material of the bobbin 202, an electrically insulating resin material can be used, and an insert molding method can be used as the forming method.

  Here, when the bobbin 202 is formed by the insert molding method, the other exposed surface of the stator core 200 is also coated with a coating made of the same material (resin material) as the bobbin 202 forming material. Thereby, electrical insulation between the motor cases 4 and 5 can be achieved.

  In the present embodiment, the bonding strength of the bobbin 202 to the stator core 200 can be increased by using an insert molding method for forming the bobbin 202.

(3) Method for Forming Coil 203 A method for forming the coil 203 on the stator core 200 will be described with reference to FIG.

  As shown in FIG.10 (b), the coil wire 2030 wound beforehand by the coil shape using the metal mold | die for winding etc. is prepared.

  Next, while loosening the winding of the coil wire 2030, the coil wire 2030 is moved from the end surface 200a of the stator core 200 to the outer peripheral portion of the bobbin 202, and the formation of the coil 203 is completed.

  Note that, as described above, the coil 203 according to the present embodiment is a coil formed by edgewise winding a rectangular wire.

  Here, in this embodiment, the coil wire 2030 that has been previously wound is loosened and moved to the stator core 200. However, in addition to this, a rectangular wire is directly edgewise around the bobbin 202. It may be wound. However, by adopting a method as shown in FIG. 10B, it becomes possible to reduce the stress strain during winding.

  In this embodiment, by using the coil 203 formed by edgewise winding a rectangular wire, the coil space factor can be increased, which is effective in increasing the torque of the motor 1 while avoiding an increase in size. .

  As described above, the core coil set 20 is completed.

5. Configuration and formation method of rotors 30 and 31
Next, the configuration and forming method of the first rotor 30 and the second rotor 31 in the rotor unit 3 will be described with reference to FIG. In the following, the method for forming the second rotor 31 will be described, and the method for forming the first rotor 30 will not be described, but can be formed by the same method.

(1) Configuration As shown in FIGS. 11A to 11E, the second rotor 31 includes a rotor base 310, a back yoke 311, a plurality of permanent magnets 312, a back yoke 313, and a plurality of A permanent magnet 314 and a plurality of clips 315 are provided.

  As shown in FIG. 11A, the rotor base 310 has a disk-like overall shape, and an engagement hole 310a with which the rotary shaft 32 engages is opened at the center. In the rotor base 310, the inner peripheral portion 310b on the inner side in the radial direction is thicker in the X direction than the outer peripheral portion 310c.

  As shown in FIG. 11B, the back yoke 311 has an annular shape, and its thickness is slightly thinner than the thickness difference (step) between the inner peripheral portion 310b and the outer peripheral portion 310c in the rotor base 310. It has become.

  As shown in FIG. 11C, each of the plurality of permanent magnets 312 has a plate shape obtained by dividing an annular shape into eight parts. In the present embodiment, a plurality of permanent magnets 312 are constituted by four S poles and four N poles.

  As shown in FIG. 11D, the back yoke 313 has an annular shape and is joined so as to cover the outer periphery of the rotor base 310, the back yoke 311, and the plurality of permanent magnets 312.

  As shown in FIG. 11E, each of the plurality of permanent magnets 314 has a shape along the outer peripheral surface of the back yoke 313. As with the permanent magnet 312, the number of permanent magnets 314 is four for the S pole and four for the N pole. Here, in the second rotor 31, the magnetic poles of the permanent magnets 314 arranged on the outer periphery are the same as the magnetic poles of the permanent magnets 312 arranged at corresponding locations in the radial direction.

(2) Formation Method First, as shown in FIG. 11A, a disk-shaped rotor base 310 is prepared.

  Next, an annular back yoke 311 is joined to the outer peripheral portion 310 c on one main surface of the rotor base 310. At this time, since the thickness of the back yoke 311 is set as described above, the main surface of the back yoke 311 is one step higher in the X direction than the inner peripheral portion 310b of the rotor base 310 as shown in FIG. It is in a low state.

  Subsequently, a plurality of permanent magnets 312 are joined to the main surface of the back yoke 311. The plurality of permanent magnets 312 are arranged and joined so that the south pole and the north pole are alternately arranged in the circumferential direction.

  The main surfaces of the plurality of permanent magnets 312 are substantially flush with the main surface of the inner peripheral portion 310b of the rotor base 310.

  As shown in FIG. 11 (d), the back yoke 313 is joined while covering the outer periphery of the rotor base 310, the back yoke 311, and the plurality of permanent magnets 312. Then, as shown in FIG. 11 (e), a plurality of permanent magnets 314 are fixed to the outer peripheral surface of the back yoke 313. A clip 315 is used to fix the plurality of permanent magnets 314.

  Here, although not shown in detail, grooves that fit the clips 315 are formed in the plurality of permanent magnets 312, the plurality of permanent magnets 314, and the inner peripheral portion 310 b of the rotor base 310. The clip 315 is substantially flush with the permanent magnets 312 and 314 and the inner peripheral surface 310b of the rotor base 310 by fitting into the grooves.

6). Magnetic flux flow The magnetic flux flow in the motor 1 having the above-described configuration will be described with reference to FIGS. 12 and 13.

  In the motor 1 according to the present embodiment, twelve core coil sets 20 are arranged in the circumferential direction in an independent state in slot units, and twelve core coils in the circumferential direction in the same independent state in slot units. A set 21 is arranged. In the twelve core coil sets 20, the three adjacent coils 203 are supplied with electric power that is out of phase with each other, and in the twelve core coil sets 21, the adjacent three coils 213 also have a phase. Electric power deviated from each other is supplied.

  As shown in FIG. 12A, the first rotor 30 and the second rotor 31 sandwich the core coil set 21 in the X direction and are spaced from the end faces 210a and 210b of the stator core 210 in the core coil set 21. It is arranged with a gap.

  Further, the core coil set 20 is disposed on the radially outer side with respect to the core coil set 21 and the rotors 30 and 31. End surfaces 200 a and 200 b of the stator core 200 in the core coil set 20 are arranged with a space from the outer peripheral surfaces of the rotors 30 and 31.

  In the motor 1, the end surfaces 200 a and 200 b of the stator core 200 in the core coil set 20 and the permanent magnets 304 and 314 of the rotors 30 and 31 are arranged with a gap in the radial direction.

  On the other hand, the end surfaces 210a and 210b of the stator core 210 in the core coil set 21 and the permanent magnets 302 and 312 of the rotors 30 and 31 are arranged with an interval in the axial direction. That is, the motor 1 according to the present embodiment is a combined type motor of a radial gap type and an axial gap type.

(1) Magnetic flux MF ₁ passing through the stator core 200 of the core coil set 20
As shown in FIG. 12B, an arbitrary core coil set 20 is a core coil set A20a, an adjacent core coil set 20 is a core coil set B20b, and one adjacent core coil set 20 is placed on the opposite side. Is a core coil set C20c.

  As shown in FIG. 12B, the permanent magnet 304 facing the end surface 200a of the stator core 200 in the core coil set A20a is a permanent magnet PA304a, and the permanent magnet 304 facing the end surface of the stator core 200 in the core coil set B20b is used. The permanent magnet 304 is a permanent magnet PB304b, and the permanent magnet 304 facing the end surface of the stator core 200 in the core coil set C20c is a permanent magnet PC304c.

As shown in FIG. 12 (b), the magnetic flux MF ₁ originating stator core 200 in the core coil set A20a extends through the permanent magnet PA304a facing the end face 200a, it flows into the back yoke 303. Flux MF _1, in the back yoke 303, branches to the front-rear circumferential direction.

The one is branched magnetic flux MF _1, flows into the stator core 200 in the core coil set B20b from the permanent magnet PB304b, the other flows in the stator core 200 in the core coil set C20c from the permanent magnet PC304c.

As you see a flow of magnetic flux MF ₁ in the X direction, as shown in FIG. 12 (a), the magnetic flux MF ₁ from the back yoke 313 of the second rotor 31, the stator core 200 in the core coil set 20 from the permanent magnet 314 Then, it flows through the permanent magnet 304 of the first rotor 30 to the back yoke 303.

The flow of the magnetic flux MF ₁ as described above changes sequentially based on the direction and phase of the current supplied to the coil 203.

(2) Magnetic flux MF ₂ passing through the stator core 210 of the core coil set 21
As shown in FIGS. 13A and 13B, the magnetic flux MF ₂ starting from the stator core 210 in the core coil set 21 flows to the back yoke 301 through the permanent magnet FA 302 a in the first rotor 30. Flux MF ₂ even in the back yoke 301, branches to the front-rear circumferential direction.

One of the branched magnetic flux MF _2, flows from the permanent magnet FB302b the stator core 210 in the core coil set 21, the other flows from the permanent magnet FC302c the stator core 210 in the core coil set 21.

When the flow of the magnetic flux MF ₂ is viewed in the X direction, the magnetic flux MF ₂ from the back yoke 311 of the second rotor 31 passes from the permanent magnet 312 through the stator core 210 in the core coil set 21 as shown in FIG. Then, it flows to the back yoke 301 through the permanent magnet 302 of the first rotor 30.

The flow of the magnetic flux MF ₂ as described above changes sequentially based on the direction and phase of the current supplied to the coil 213.

7). Effect In the motor 1 according to the present embodiment, the end surfaces 200a and 200b of the stator core 200 of the core coil set 20 are opposed to the permanent magnets 304 and 314 of the rotors 30 and 31 in the radial direction, and the stator core 210 of the core coil set 21 is. End surfaces 210a and 210b of the rotors 30 and 31 are opposed to the permanent magnets 302 and 312 in the axial direction. That is, the motor 1 is a composite type motor of a radial gap type and an axial gap type, and is superior in achieving high torque.

  In the motor 1 according to this embodiment, as the stator cores 200 and 210, a laminate of thin plate materials 2000 made of an amorphous soft magnetic material is used. In the stator cores 200 and 210 having such a configuration, the iron loss (vortex loss) can be significantly reduced as compared with the stator core using the directional electromagnetic steel plate or the silicon steel plate.

  Therefore, in the motor 1, it is possible to increase the torque while avoiding an increase in size relative to the rotating electrical machine according to the related art.

  Further, in the motor 1 according to the present embodiment, the plate thickness of the thin plate material 2000 constituting the stator cores 200 and 210 is extremely thin as 0.05 mm or less (for example, 0.025 mm). Thereby, compared with the prior art which uses the silicon steel plate which 0.2mm was the minimum of plate | board thickness, the motor 1 which can aim at reduction of a vortex loss and can aim at high torque, avoiding enlargement. It becomes feasible.

  Further, in the motor 1 according to the present embodiment, by making the shape of the stator core 200 as shown in FIG. 7A and the like, the size of the entire motor is avoided while increasing the length in the extending direction. be able to. Therefore, the winding region of the coil 203 can be widened, and an increase in size of the entire motor can be avoided.

  Further, the motor 1 according to the present embodiment has a configuration in which two rotors 30 and 31 are provided for one stator unit 2. Thereby, generation | occurrence | production of magnetic saturation can be suppressed and the opposing area of the end surfaces 200a, 200b, 210a, 210b of the stator cores 200, 210 and the permanent magnets 302, 304, 312, 314 of the rotors 30, 31 can be increased. Therefore, the motor 1 can be further increased in torque while avoiding an increase in size.

Further, in the motor 1 according to the present embodiment, the coil 203 in the core coil set 20 is wound around the body portion 200c of the stator core 200 as shown in FIG. By adopting such a configuration, the distance between the coil 203 and the permanent magnets 304 and 314 is increased by the arm portions 200d and 200e between the coil 203 and the permanent magnets 304 and 314 of the rotors 30 and 31. it can be a suitable in forming the flow of good magnetic flux MF _1.

  Further, in the motor 1 according to the present embodiment, coils configured by rectangular wire edgewise winding are employed as the coils 203 and 213 in the core coil sets 20 and 21. By adopting the coils 203 and 213 formed by winding the rectangular wire in the edgewise manner as described above, a high coil space factor can be realized, which is suitable for achieving a high torque.

  In the motor 1 according to the present embodiment, the end surfaces 200a and 200b of the stator core 200 are configured by curved surfaces. Thus, the end surfaces 200a and 200b of the stator core 200 are curved so as to follow the outer peripheral surfaces of the rotors 30 and 31, so that the end surfaces 200a and 200b of the stator core 200 and the permanent magnets 304 and 314 of the rotors 30 and 31 are formed. This is suitable for increasing torque while avoiding an increase in size of the motor 1.

  Further, in the motor 1 according to the present embodiment, the exposed surface of the stator core 200 is covered with a film made of the same material as that constituting the bobbin 202, so that the adhesive force between the thin plate members in the stator core 200 is reinforced. In addition, since the material constituting the bobbin 202 is an insulating material, electrical insulation between the stator core 200 and external members such as the motor cases 4 and 5 can be secured.

  Further, in the motor 1 according to the present embodiment, since the support members 201 and 211 are inserted in a partial region between the stator cores 200 and 210 and the coils 203 and 213, When the coils 203 and 213 are wound, stress applied to the stator cores 200 and 210 can be relaxed.

  Further, in the method of forming the stator cores 200 and 210 according to the present embodiment, since the strip-shaped thin plate material 2000 is wound and then a part is cut out to form the stator core 200, the steel plate previously cut into a strip shape is used. Compared to the case of stacking, a thin plate material 2000 having a thin plate thickness can be used. That is, in contrast to the thickness of a silicon steel plate, in which 0.2 mm is the lower limit in the past due to manufacturing restrictions, in the forming method according to the present embodiment, the thickness is 0.05 mm or less (for example, 0.025 mm). It is possible to use a thin plate material 2000 having a plate thickness. Therefore, it is possible to significantly reduce iron loss (vortex loss), and it is possible to manufacture the motor 1 with high torque while avoiding an increase in size.

  Furthermore, in the motor 1 according to the present embodiment, the twelve core coil sets 20 and the twelve core coil sets 21 are integrated with the inner diameter side fixing plates 24 and 25 and the outer diameter side fixing plates 26 and 27. It is going to be fixed to. For this reason, the core coil sets 20 and 21 can be fixed with high positional accuracy while suppressing an increase in the number of parts.

[Second Embodiment]
1. Configuration of Stator Unit 6 Of the configuration of the motor according to the second embodiment of the present invention, the configuration of the stator unit 6 will be described with reference to FIG. FIG. 14 is a schematic cross-sectional view showing a partial configuration of the stator unit 6 according to the present embodiment.

  As shown in FIG. 14, the stator unit 6 according to this embodiment includes a plurality of core coil sets 60, a plurality of core coil sets 61, and a back yoke 62. In FIG. 14, the core coil set 60 and the core coil set 61 are illustrated one by one, but a plurality of each (for example, twelve) each in the circumferential direction, as in the first embodiment. Has been placed.

  Each of the plurality of core coil sets 60 includes a stator core 600, a support member (not shown), a bobbin 602, and a coil 603. In the stator core 600 according to the present embodiment, an arm portion 600d extending in the X direction from one of the body portions 600c has an arc shape, and has a J shape or an L shape in a side view from the circumferential direction. . The end surface 600a at the tip of the arm portion 600d in the stator core 600 is subjected to curved processing having a center in the Z direction. This is intended to be along the outer peripheral surface of the rotor 30 and to narrow the distance between the end surface 600 a of the stator core 600 and each permanent magnet 304 of the rotor 30.

  Note that a connecting portion 600e extending from the other of the trunk portions 600c of the stator core 600 is connected to the back yoke 62.

  Each of the plurality of core coil sets 61 includes a stator core 610, a support member (not shown), a bobbin 612, and a coil 613. In the stator core 610, an end surface 610 a of an arm portion 610 d that extends in the X direction from one of the body portions 610 c faces the permanent magnet 302 joined to the main surface of the rotor 30.

  A connection portion 600e extended from the other of the trunk portions 610c of the stator core 610 is connected to the back yoke 62.

  The back yoke 62 has an annular shape as a whole, and the plurality of stator cores 600 and all the connection portions 600e and 610e of the plurality of stator cores 610 are connected. The back yoke 62 is formed by winding a thin plate material made of an amorphous soft magnetic material, and the thickness of the thin plate material used is the same as that of the stator cores 200 and 210.

  In addition, about the structure which is not demonstrated especially about the stator unit 6 which concerns on this embodiment, it has the structure similar to the said 1st Embodiment. For example, also in this embodiment, the coils 603 and 613 of the stator cores 60 and 61 are surrounded by a combination of the inner diameter side fixed plate and the outer diameter side fixed plate, and the outer peripheral ring, the inner peripheral ring and the intermediate ring. Coolant is circulated inside.

2. As shown in FIG. 14, in the motor according to the present embodiment, in the state independent of each slot, 12 core coil sets 60 are arranged in the circumferential direction. Twelve core coil sets 61 are arranged in the direction. The three adjacent coils 603 and 613 are supplied with electric power whose phases are shifted from each other.

When the flow of the magnetic flux is viewed in the X direction, as shown in FIG. 14, the magnetic flux MF ₃ passing through the stator core 600 from the back yoke 62 flows through the permanent magnet 304 to the back yoke 303 of the rotor 30. The magnetic flux MF ₃ branches in the circumferential direction at the back yoke 303 and flows from the stator core 600 to the back yoke 62 through the adjacent permanent magnet 304.

On the other hand, the magnetic flux MF _{4 that} has passed through the stator core 610 from the back yoke 62 flows through the permanent magnet 302 to the back yoke 301 of the rotor 30. The magnetic flux MF ₄ branches in the circumferential direction at the back yoke 301, passes through the adjacent permanent magnet 302, and flows from the stator core 610 to the back yoke 62.

The flow of the magnetic fluxes MF ₃ and MF ₄ as described above is sequentially changed based on the direction and phase of the current supplied to the coils 603 and 613, whereby the motor is driven to rotate.

3. Effect The motor according to the present embodiment differs from the first embodiment in that the shape of the stator core 600 is J-shaped or L-shaped in a side view. Due to such differences, in the motor according to the present embodiment, high torque can be realized by reducing the vortex loss as described above while further reducing the size.

In the present embodiment, the connecting portions 600e and 610e in the stator cores 600 and 610 are connected to the back yoke 62, and thereby, the flow of good magnetic fluxes MF ₃ and MF ₄ can be avoided while avoiding an increase in the size of the motor. Can be formed.

  In addition, since there is no difference from the said 1st Embodiment about another structure, the effect of the motor 1 which concerns on the said 1st Embodiment can be acquired as it is.

[Third Embodiment]
Of the configuration of the motor according to the third embodiment of the present invention, the configuration of the stator unit 7 will be described with reference to FIG.

  The stator unit 7 includes a plurality of core coil sets 20, a plurality of core coil sets 21, a plurality of core coil sets 70, a back yoke 71, a plurality of core coil sets 72, and a back yoke 73. Among these, the configurations of the plurality of core coil sets 20 and the plurality of core coil sets 21 are the same as those in the first embodiment, and thus the description thereof is omitted.

  Each of the plurality of core coil sets 70 includes a stator core 700, a supporting member (not shown), a bobbin 702, and a coil 703. The plurality of core coil sets 70 are arranged in the circumferential direction at intervals.

  The end surface 700 a of the stator core 700 in each core coil set 70 is opposed to the end surface of the stator core 210 with the first rotor 80 interposed therebetween. Further, the end surface 700 a of the stator core 700 faces the permanent magnet 806 of the first rotor 80 with a gap in the X direction. The permanent magnet 806 is joined to the rotor base 800 via a back yoke 805.

  In the plurality of core coil sets 70, the other end of each stator core 700 is connected to the back yoke 71. The back yoke 71 has an annular shape and is formed by winding a thin plate material made of an amorphous soft magnetic material.

  Next, each of the plurality of core coil sets 72 includes a stator core 720, a support member (not shown), a bobbin 722, and a coil 723. The plurality of core coil sets 72 are arranged in the circumferential direction at intervals.

  The end surface 720 a of the stator core 720 in each core coil set 72 is opposed to the end surface of the stator core 210 with the second rotor 81 interposed therebetween. Further, the end surface 720 a of the stator core 720 faces the permanent magnet 816 of the second rotor 81 with a gap in the X direction. The permanent magnet 816 is joined to the rotor base 810 via a back yoke 815.

  In the plurality of core coil sets 72, the other end of each stator core 720 is connected to the back yoke 73. The back yoke 73 also has an annular shape and is formed by winding a thin plate material made of an amorphous soft magnetic material.

In addition to the magnetic fluxes MF ₁ and MF ₂ , magnetic fluxes MF ₅ and MF ₆ flow between the stator unit 7 and the first rotor 80 and the second rotor 81. Specifically, the magnetic flux MF ₁ flows from the back yoke 813 of the second rotor 81 to the stator core 200 via the permanent magnet 814 and passes through the permanent magnet 804 of the first rotor 80 as in the first embodiment. And flows to the back yoke 803. The magnetic flux MF ₁ branches in the circumferential direction at the back yoke 803. The branched magnetic flux MF ₁ flows to the stator core 200 via the permanent magnets 804 adjacent in the circumferential direction, and flows to the back yoke 813 via the permanent magnet 814.

The magnetic flux MF ₂ flows from the back yoke 811 of the second rotor 81 to the stator core 210 via the permanent magnet 812 and flows to the back yoke 801 via the permanent magnet 802 of the first rotor 80. The magnetic flux MF ₁ branches in the circumferential direction at the back yoke 801. The branched magnetic flux MF ₂ returns to the stator core 210 via the circumferentially adjacent permanent magnets 802 and flows to the back yoke 811 via the permanent magnets 812.

The magnetic flux MF ₅ flows from the back yoke 71 through the stator core 700 to the back yoke 805 via the permanent magnet 806 of the first rotor 80 facing the magnetic flux MF ₅ . The magnetic flux MF ₅ branches in the circumferential direction at the back yoke 805. The branched magnetic flux MF ₅ returns to the stator core 700 via the permanent magnets 806 adjacent in the circumferential direction and flows to the back yoke 71.

The magnetic flux MF ₆ flows from the back yoke 815 of the second rotor 81 to the stator core 720 via the permanent magnet 816 and then flows to the back yoke 73. The magnetic flux MF _{6 that} has flowed to the back yoke 73 flows to the stator core 720 that is adjacent in the circumferential direction, and then flows to the back yoke 815 through the opposing permanent magnet 816.

  The permanent magnets 802, 804, and 806 in the first rotor 80 are all the same magnetic poles at predetermined cross-sectional positions as shown in FIG. 15A, and the permanent magnets 812, 814, and 816 in the second rotor. Are the same magnetic poles at predetermined cross-sectional positions as shown in FIG. 15A, and are different from the permanent magnets 802, 804, and 806. Specifically, in the cross-sectional position as shown in FIG. 15A, when the permanent magnets 802, 804, 806 are N poles, the permanent magnets 812, 814, 816 are S poles. Conversely, when the permanent magnets 802, 804, 806 are south poles, the permanent magnets 812, 814, 816 are north poles.

  In the motor according to the present embodiment, by adopting the configuration as shown in FIG. 15A, the facing area between the stator cores 200, 210, 700, 720 and the permanent magnets 804, 802, 806, 814, 812, 816 As a result, the torque can be further increased as compared with the motor 1 according to the first embodiment.

  Since other configurations are the same as those in the first embodiment, the same effects can be obtained.

[Fourth Embodiment]
Of the configuration of the motor according to the fourth embodiment of the present invention, the configuration of the stator unit 9 will be described with reference to FIG.

  The stator unit 9 includes a plurality of core coil sets 60, a plurality of core coil sets 61, a plurality of core coil sets 90, a back yoke 62, and a back yoke 91. Among these, the configurations of the plurality of core coil sets 60, the plurality of core coil sets 61, and the back yoke 62 are the same as those in the second embodiment, and thus the description thereof is omitted.

  Each of the plurality of core coil sets 90 includes a stator core 900, a support member (not shown), a bobbin 902, and a coil 903. The plurality of core coil sets 90 are arranged in the circumferential direction at intervals.

  The end surface 900 a of the stator core 900 in each core coil set 90 is opposed to the end surface of the stator core 610 across the rotor 80. The end surface 900a of the stator core 900 faces the permanent magnet 806 of the rotor 80 with a gap in the X direction. The permanent magnet 806 is joined to the rotor base 800 via a back yoke 805.

  In the plurality of core coil sets 90, the other end of each stator core 900 is connected to the back yoke 91. The back yoke 91 has an annular shape and is formed by winding a thin plate material made of an amorphous soft magnetic material.

In addition to the magnetic fluxes MF ₃ and MF ₄ , a magnetic flux MF ₇ flows between the stator unit 9 and the rotor 80. Specifically, the magnetic flux MF ₃ flows from the back yoke 62 through the stator core 600 to the back yoke 803 of the rotor 80 via the permanent magnet 804, as in the second embodiment. The magnetic flux MF ₃ branches in the circumferential direction at the back yoke 803. The branched magnetic flux MF ₃ returns to the stator core 600 via the permanent magnets 804 adjacent in the circumferential direction and flows to the back yoke 62.

The magnetic flux MF ₄ flows from the back yoke 62 through the stator core 610 to the back yoke 801 of the rotor 80 via the permanent magnet 802. The magnetic flux MF ₄ branches in the circumferential direction at the back yoke 801. The branched magnetic flux MF ₄ returns to the stator core 610 via the permanent magnets 802 adjacent in the circumferential direction and flows to the back yoke 62.

The magnetic flux MF ₇ flows from the back yoke 91 through the stator core 900 to the back yoke 805 via the permanent magnet 806 of the opposing rotor 80. The magnetic flux MF ₇ branches in the circumferential direction at the back yoke 805. The branched magnetic flux MF ₇ returns to the stator core 900 via the permanent magnets 806 adjacent in the circumferential direction and flows to the back yoke 91.

  In the motor according to the present embodiment, by adopting the configuration as shown in FIG. 15B, the end surfaces of the stator cores 600, 610, 900 and the permanent magnets 804, 802 are more effective than the motor according to the second embodiment. The area facing 806 can be increased, and higher torque can be achieved than in the motor according to the second embodiment.

  Since other configurations are the same as those in the second embodiment, the same effects can be obtained.

[Fifth Embodiment]
Of the configuration of the motor according to the fifth embodiment of the present invention, a part of the configuration of the core coil set will be described with reference to FIGS. 16A and 16B, the stator core 200 and the support members 201 and 204 are extracted and illustrated.

  As shown in FIGS. 16A and 16B, support members 201 and 204 are attached to all of the four main surfaces of the body portion 200c with respect to the stator core 200 according to the present embodiment. The support member 204 is made of a ceramic material or the like, similar to the support member 201 or the like.

  Thus, when employ | adopting the form which affixed the support members 201 and 204 to all four directions, compared with the said 4th Embodiment from the said 1st Embodiment, it starts on the stator core 200 at the time of winding a coil. The stress can be further relaxed. Therefore, the stress strain to the stator core 200 during coil winding can be further reduced.

[Modification]
In the first to fifth embodiments, the motor is employed as an example of the rotating electrical machine, but the present invention is not limited to this. For example, the present invention can be applied to a generator or a generator / motor.

  Moreover, in the said 1st Embodiment etc., the method of winding the thin plate material 2000 and cutting out a part was employ | adopted as an example of the formation method of the stator core 200, However This invention is not limited to this. For example, the present invention can employ a stator core formed by laminating thin plate materials previously formed in a strip shape by punching or the like in the thickness direction.

  In the first to fifth embodiments, the cross-sectional shape of the stator core 200 is a square or a rectangle. However, the present invention is not limited to this. For example, a stator core having a trapezoidal shape or a parallelogram shape in cross section can be adopted.

  In the first to fifth embodiments, the stator cores 200, 210, 600, 700, 720, and 900 are formed by laminating a plurality of thin plate materials made of an amorphous soft magnetic material. Is not limited to this. For example, the stator core may be configured by laminating a plurality of thin plate materials made of a nanocrystallized soft magnetic material that is not in an amorphous state.

  Further, ceramics is adopted as a material for the support members 201 and 204 inserted between the stator cores 200, 210, 600, 610, 700, 720, 900 and the bobbins 202, 212, 602, 612, 702, 722, 902. However, the present invention is not limited to this. For example, a resin material or the like can be used.

  In the first to fifth embodiments, all the stator cores 200, 210, 600, 610, 700, 720, and 900 are laminated bodies of thin plate materials 2000 made of an amorphous soft magnetic material. Is not limited to this. For example, a silicon steel plate may be used for some stator cores.

  In the first to fifth embodiments, twelve core coil sets 20, 21, 60, 61, 70, 72, and 90 are arranged, and the rotors 30, 31, 80, and 81 are arranged. Although the permanent magnets in each of these are eight poles, the present invention is not limited to this. For example, a configuration in which 8 pole permanent magnets are opposed to 6 core coil sets, a configuration in which 8 pole permanent magnets are opposed to 18 core coil sets, 21 core coil sets It is also possible to adopt aspects relating to various combinations, such as a configuration in which an 8-pole permanent magnet is opposed to a 12-core coil set, and a configuration in which a 16-pole permanent magnet is opposed to 12 core coil sets. .

  In the first embodiment, the plurality of core coil sets 20 and the plurality of core coil sets 21 are cooled by the same coolant flow. However, the present invention is limited to this. It is not something to receive. For example, the cooling system of the plurality of core coil sets 20 and the cooling system of the plurality of core coil sets 21 may be separate systems, and temperature control may be performed for each system.

1 Motor (Rotating electric machine)
2, 6, 7, 9 Stator units 2c, 2d, 2e Gap 3 Rotor unit 4, 5 Motor case 5b Recess groove 20, 21, 60, 61, 70, 72, 90 Core coil set 22 Outer ring 23 Inner ring 24 , 25 Inner diameter side fixed plate 26, 27 Outer diameter side fixed plate 28 Intermediate ring 30, 80 First rotor 31, 81 Second rotor 32 Rotating shaft 62, 71, 73, 91 Back yoke 200, 210, 600, 610, 700 , 720, 900 Stator core 200a, 200b, 210a, 210b, 600a. 610a, 700a, 720a, 900a End face 200c, 600c Body 200d, 200e, 600d Arm 201, 204, 211 Support member 202, 212, 602, 612, 702, 722, 902 Bobbin 203, 213, 603, 613, 703 , 723, 903 Coil 300, 310, 800, 810 Rotor base 301, 303, 311, 313, 801, 803, 805, 811, 813, 815 Back yoke 302, 302a, 302b, 302c, 304a, 304b, 304c, 312 , 314, 802, 804, 806, 812, 814, 816 Permanent magnet 2000 Thin plate material

Claims (12)

A stator and a rotor,
The stator is
A plurality of first stator cores arranged in the circumferential direction at intervals, a plurality of first coils wound around each of the plurality of first stator cores;
A plurality of second stator cores arranged in a circumferential direction in a state of being spaced from each other radially inward of the plurality of first stator cores, and a plurality of second stator cores wound around each of the plurality of second stator cores. Two coils,
Have
Each of the plurality of first stator cores extends in the axial direction from one of the first body portion and the first body portion along the axial direction and is bent in the radial direction when viewed from the circumferential direction. And a first end surface that is an end surface of the first arm portion is directed radially inward,
Each of the plurality of first coils is wound around the first body portion of each of the plurality of first stator cores,
Each of the plurality of second stator cores has a second body portion extending in the axial direction and a second arm portion extending in the axial direction from one of the second body portions when viewed from the circumferential side. And the second end surface, which is the end surface of the second arm portion, faces outward in the axial direction,
Each of the plurality of second coils is wound around the second body portion of each of the plurality of second stator cores,
The rotor is
A rotation axis;
A plurality of first permanent magnets that rotate integrally with the rotary shaft and are opposed to the first end faces of the plurality of first stator cores with a gap in a radial direction;
A plurality of second permanent magnets that rotate integrally with the rotation shaft and are opposed to the second end surfaces of the plurality of second stator cores with a gap in the axial direction;
A rotating electrical machine characterized by comprising: The rotating electrical machine according to claim 1, wherein each of the plurality of first stator cores is a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated. The rotating electrical machine according to claim 2, wherein a thickness of the thin plate material made of the amorphous soft magnetic material is 0.05 mm or less. In each of the plurality of first stator cores, the stacking direction of the stacked body is the radial direction at the first body portion, and the stacking interface at the first end surface is orthogonal to both the axial direction and the radial direction. The rotating electrical machine according to claim 2 or 3, wherein the rotating electrical machine is extended. Each of the plurality of first stator cores further includes a third arm portion extending in the axial direction from the other of the first body portions and bent in the radial direction, and is an end surface of the third arm portion. The third end face faces radially inward,
5. The rotor according to claim 1, further comprising a plurality of third permanent magnets arranged to face the third end surfaces of the plurality of first stator cores with a gap therebetween in a radial direction. Any of the rotating electrical machines. The rotor has a first rotor and a second rotor that rotate integrally with the rotating shaft,
The plurality of first permanent magnets are provided in a state of being arranged on the outer peripheral surface of the first rotor,
The plurality of third permanent magnets are provided in a state aligned with the outer peripheral surface of the second rotor,
In each of the plurality of first stator cores, the first end surface is formed of a curved surface along the outer peripheral surface of the first rotor, with the rotation axis as the center, and the third end surface is centered on the rotation axis, The rotating electrical machine according to claim 5, comprising a curved surface along an outer peripheral surface of the second rotor. The rotating electrical machine according to any one of claims 1 to 6, wherein each of the plurality of second stator cores is a laminated body in which a plurality of thin plate materials made of an amorphous soft magnetic material are laminated. The stator is radially inward of the plurality of first stator cores and axially outside the second stator core, and a plurality of third stator cores arranged circumferentially in a state of being spaced apart from each other; A plurality of third coils wound around each of the plurality of third stator cores,
Each of the plurality of third stator cores has a fifth end surface, which is one end surface, facing the second end surface with a gap therebetween,
The rotating electrical machine according to claim 7, wherein the rotor further includes a plurality of fifth permanent magnets arranged to face the fifth end surfaces of the plurality of third stator cores with a gap therebetween. Each of the plurality of second stator cores has a fourth arm portion extending in the axial direction from the other of the second body portions, and a fourth end surface that is an end surface of the fourth arm portion is the second arm portion. Facing outward in the axial direction opposite the end face,
The rotation according to claim 7 or 8, wherein the rotor further includes a plurality of fourth permanent magnets arranged to face the fourth end surfaces of the plurality of second stator cores with a gap therebetween. Electric. The stator is radially inward of the plurality of first stator cores and axially outward from the second stator core, and a plurality of fourth stator cores arranged circumferentially in a state of being spaced apart from each other. A plurality of fourth coils wound around each of the plurality of fourth stator cores,
Each of the plurality of fourth stator cores has a sixth end surface, which is one end surface, facing the fourth end surface with a gap therebetween,
The rotating electrical machine according to claim 9, wherein the rotor further includes a plurality of sixth permanent magnets arranged to face the sixth end surfaces of the plurality of third stator cores with a gap therebetween. The stator further includes a back yoke having a ring shape with the rotation axis as a center,
Each of the plurality of first stator cores further includes a first connection portion extending in the axial direction from the other of the first body portions and connected to the back yoke,
5. Each of the plurality of second stator cores further includes a second connection portion that extends in the axial direction from the other of the second body portions and is connected to the back yoke. Rotating electric machine. The rotating electric machine according to any one of claims 1 to 11, wherein each of the plurality of first coils is a coil configured by edgewise winding of a rectangular wire.

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