JP2017195683A - Dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase generation of torque furthermore, in an axial radial composite gap dynamo-electric machine.SOLUTION: A dynamo-electric machine 1A includes a rotor 2 having a revolving shaft 10 and rotor bodies 12A, 12B, an axial stator 4 placed while spaced apart from the rotor bodies 12A, 12B by an air gap in the axial direction, and radial stators 6A, 6B placed on the radial outside of the rotor bodies 12A, 12B while spaced apart by an air gap. The rotor bodies 12A, 12B include a permanent magnet 22 for axial placed oppositely to the axial stator 4, and performing magnetic exchange between the axial stator 4, and multiplex permanent magnets 26 for radial, independent from the permanent magnet 22 for axial, placed oppositely to the radial stators 6A, 6B, and performing magnetic exchange between the radial stators 6A, 6B.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an axial-radial composite gap type rotating electrical machine (motor, generator, or motor / generator) that performs magnetic exchange both in the axial direction and in the radial direction.

  For the purpose of increasing the generated torque, an axial-radial composite gap type rotating electrical machine as described above has been developed. For example, Patent Document 1 discloses a permanent magnet type synchronous motor as an example. This electric motor has a disk-shaped rotor in which permanent magnets (fields) and field teeth made of a ferromagnetic material are alternately arranged around an output shaft (rotating shaft), and a predetermined outside of the rotor in the radial direction. A radial armature arranged with an air gap (radial gap) maintained, and a stator composed of a pair of axial armatures arranged with a predetermined air gap (axial gap) on both sides in the axial direction of the rotor, I have. According to this electric motor, since magnetic exchange is performed both in the axial direction and in the radial direction, an increase in generated torque can be expected with a relatively compact configuration.

JP 2014-165927 A

  However, in a rotating electrical machine such as Patent Document 1, since one permanent magnet is shared by a radial armature and an axial armature, the reverse magnetic field received from the armature is excessive with respect to the permanent magnet, and the irreversible reduction is achieved. It is thought that magnetism is likely to occur. Therefore, there is room for improvement in generating higher torque.

  The present invention has been made in view of the circumstances as described above, and relates to an axial-radial composite gap type rotating electrical machine, and an object thereof is to provide a technique that further contributes to an increase in generated torque.

  In order to solve the above-described problems, an axial-radial composite gap type rotating electrical machine according to the present invention includes a rotor including a rotating shaft and a rotor body that rotates together with the rotating shaft, and a plurality of coils arranged in the rotation direction of the rotating shaft. An axial stator disposed with a predetermined air gap in the axial direction of the rotating shaft with respect to the rotor body, and a plurality of coils arranged in the rotating direction of the rotating shaft, the outer radial direction of the rotor body A plurality of axial permanent magnets which are arranged opposite to the axial stator and exchange magnetically with the axial stator. And a permanent magnet different from the axial permanent magnet, the radial magnet being disposed opposite the radial stator. In which and a plurality of permanent magnets for radial for magnetic exchange between the over data.

  According to this configuration, while magnetic exchange is performed between the axial permanent magnet and the axial stator, magnetic exchange is performed between the radial permanent magnet and the radial stator that are provided separately from the axial permanent magnet. Done. In other words, since the permanent magnets are provided separately for the axial and radial types, the armature is used for the permanent magnets compared to the conventional structure in which the permanent magnets are shared for the axial and radial types. Therefore, the reverse magnetic field received from is excessive, and irreversible demagnetization does not easily occur. Therefore, this contributes to an increase in the total amount of magnetic flux and thus an increase in generated torque.

  In the above description, “magnetic exchange” as used herein means an exchange interaction of magnetization.

  In the above configuration, it is preferable that the rotor includes a first rotor body and a second rotor body disposed on both sides of the axial stator as a rotor body.

  According to this configuration, it is possible to further increase the magnetic exchange area between the rotor and the axial stator, which further contributes to an increase in generated torque.

  In the above configuration, it is preferable that the axial permanent magnet and the radial permanent magnet are respectively disposed at the same rotational angle position of the rotor body.

  According to this configuration, since the positions of the coils of the respective stators can be made uniform, simplification can be achieved and motor control can be facilitated.

  In this case, it is preferable that the axial permanent magnet and the radial permanent magnet arranged at the same angular position have the same magnetic pole on the air gap side.

  The magnetic flux formed between the axial permanent magnet and the axial stator and the magnetic flux formed between the radial permanent magnet and the radial stator interact with each other (interfere) to inhibit torque generation. Is suppressed.

  In the above rotating electrical machine, it is preferable that the rotor includes a coolant circulation passage for circulating coolant through the rotor shaft to the rotor body.

  According to this structure, it becomes possible to cool each permanent magnet of a rotor main body effectively, and it becomes possible to suppress the fall of the motor efficiency accompanying the high temperature of a permanent magnet.

  Each of the axial stator and the radial stator includes an annular stator body including a stator core and the coil mounted on the stator core, and the rotating electrical machine includes the stator bodies of the axial stator and the radial stator. It is preferable that an annular closed space that houses the coil of at least one of the stator main bodies and a coolant supply / discharge portion that can supply and discharge coolant to and from the closed space are preferable.

  According to this configuration, each coil of the axial stator and / or the radial stator rotor can be effectively cooled, and it is possible to suppress a decrease in motor efficiency due to the high temperature of the coil.

  The rotating electrical machine includes a case in which the rotor, the axial stator, and the radial stator are accommodated, and the axial stator includes an annular stator body including a stator core and the coil attached to the stator core; And a pair of support plates that are assembled to the stator body from both sides in the axial direction and extend outward in the radial direction of the stator body, and the peripheral portions of the support plates are fixed to the case Therefore, it is preferable to be assembled to the case.

  According to this configuration, the axial stator can be stably and reliably supported by the case.

  As described above, according to the axial-radial composite gap type rotating electrical machine of the present invention, it is possible to contribute to an increase in generated torque.

1 is a perspective view of an axial-radial composite gap type rotating electrical machine of the present invention. It is sectional drawing of the said rotary electric machine. It is a perspective view of the said rotary electric machine of the state which removed the case. It is the figure which looked at the rotary electric machine of FIG. 3 from the axial direction (axial direction (+) side). (A) is a perspective view of the 1st rotor main body seen from the air gap side (axial direction (+) side), (b) is the 1st rotor seen from the axial gap side (axial direction (-) side). It is a perspective view of a main body. It is an assembly process figure of a rotor main body. It is an assembly process figure of a rotor main body. It is an assembly process figure of a rotor main body. It is the figure which removed the 1st rotor main body from the rotary electric machine of FIG. It is a perspective view of an axial stator. It is a perspective view of an axial stator in the state where a support plate was removed. It is a perspective view of a 1st radial stator. It is sectional drawing of the axial radial composite gap type rotary electric machine which concerns on the modification of this invention. (A) It is the perspective view which looked at the rotor main body which concerns on a modification from the air gap side, (b) is the perspective view which looked at the rotor main body from the anti-air gap side. (A) It is a perspective view of the radial back yoke of the rotor main body which concerns on a modification, (b) is a perspective view of the radial back yoke with which the axial back yoke was assembled | attached.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[overall structure]
FIG. 1 is a perspective view of an axial-radial composite gap type rotating electrical machine 1A (hereinafter abbreviated as rotating electrical machine 1A) according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the rotating electrical machine 1A. 3 is a perspective view of the rotating electrical machine 1A from which a case 8 described later is removed, and FIG. 4 is a view (plan view) of the rotating electrical machine 1A shown in FIG.

  As shown in these drawings, the rotating electrical machine 1A is interposed between the rotor 2 having the rotation shaft 10 as a center and the rotor bodies 12A and 12B described later of the rotor 2, and the rotation shaft with respect to the rotor bodies 12A and 12B. The axial stator 4 is disposed opposite to each other with a predetermined air gap (axial gap) 10 in the axial direction, and is opposed to the rotor bodies 12A and 12B on the radially outer side with a predetermined air gap (radial gap) therebetween. Further, a radial stator 6A, 6B and a case 8 in which the rotor 2 and the stators 4, 6A, 6B are accommodated are provided.

  In the following description, unless otherwise specified, the direction parallel to the rotation axis 10 is “axial direction or axial direction”, the direction orthogonal to the rotation axis 10 is “radial direction or radial direction”, and the rotation axis 10 ( The rotation direction of the rotor 2) is referred to as “circumferential direction”. For convenience, in the direction parallel to the rotation shaft 10, one side is referred to as an axial direction (+) side, and the opposite side is referred to as an axial direction (-) side.

  The rotor 2 includes a pair of disk-shaped rotor main bodies 12A and 12B that face each other at a predetermined interval, and the rotating shaft 10 that passes through the centers of the rotor main bodies 12A and 12B.

  Each rotor body 12A, 12B is fixed to a rotating shaft 10, and the rotating shaft 10 is rotatably supported by a case 8 via a bearing 9.

  Specifically, as shown in FIG. 2, the rotary shaft 10 has a multi-stage shaft structure including a spline shaft portion 11b, a screw shaft portion 11c, and a support shaft portion 11d in that order on both sides of the main shaft portion 11a in the axial direction. have. The diameter (outer diameter) of the main shaft portion 11a is the largest, and the diameter decreases in the order of the spline shaft portion 11b, the screw shaft portion 11c, and the support shaft portion 11d. On the other hand, a through hole 14 having a spline groove corresponding to the spline shaft portion 11b is formed at the center of the rotor main bodies 12A and 12B. Then, the rotor main bodies 12A and 12B are mounted from both sides of the rotary shaft 10 so that the spline shaft portions 11b are inserted into the through holes 14, respectively, and further, the screw shaft portions from the outside of the rotor main bodies 12A and 12B. Each nut member 16 is screwed to 11c. Thus, the rotor main bodies 12A and 12B are sandwiched between the nut member 16 and the main shaft portion 11a of the rotary shaft 10 via the spacers 17, respectively. That is, each rotor main body 12A, 12B is spline-coupled to the rotary shaft 10 so as to be able to rotate integrally with the rotary shaft 10.

  The basic structures of the rotor bodies 12A and 12B (the first rotor body 12A and the second rotor body 12B) are the same. Here, the configuration of the first rotor main body 12A located on the axial direction (+) side of the two rotor main bodies 12A and 12B will be described, and then the relationship between the first rotor main body 12A and the second rotor main body 12B. I will mention it.

  A plurality of axial permanent magnets 22 arranged to face the first rotor main body 12A and the axial stator 4 and perform magnetic exchange (magnetization exchange interaction) with the axial stator 4, and the axial permanent magnet 22 And a plurality of radial permanent magnets 26 that are arranged to face the first radial stator 6A and perform magnetic exchange with the first radial stator 6A.

  More specifically, the first rotor main body 12A includes a disc-shaped base member 20 having the through hole 14 at the center and the base member, as shown in FIGS. 2 and 5A and 5B. 20, a plurality of axial permanent magnets 22, an axial back yoke 24, a plurality of radial permanent magnets 26, a radial back yoke 28, and a plurality of clamp members 30.

  As shown in FIG. 6, the base member 20 includes a circular plate portion 20a and a boss portion 20b protruding in the axial direction from the base member 20a at the center thereof, and is entirely made of a nonmagnetic material (such as alumina). Ceramic, reinforced plastic, austenitic stainless steel, aluminum, etc.). The radial back yoke 28 is disposed on the outer periphery of the base member 20.

  The radial back yoke 28 is made of a soft magnetic material. Specifically, the radial back yoke 28 is a molded body in which a soft magnetic metal powder whose surface is electrically insulated, for example, a metal powder such as Fe, Fe-Si, and Fe-Ni, is compression-molded together with a binder. is there. The radial back yoke 28 is a cylindrical member having an axial dimension equivalent to the axial dimension (thickness dimension) of the base member 20 in the boss portion 20b, and is externally fitted to the plate portion 20a of the base member 20. Has been.

  As shown in FIG. 7, the axial back yoke 24 and the plurality of axial permanent magnets are formed in an annular recess formed by the plate portion 20 a, the boss portion 20 b, and the radial back yoke 28 of the base member 20. 22 are disposed in a stacked state, and the plurality of radial permanent magnets 26 are disposed on the outer peripheral surface of the radial back yoke 28.

  The axial back yoke 24 is a molded body equivalent to the radial back yoke 28, that is, a molded body mainly composed of the soft magnetic metal powder. The axial back yoke 24 has an annular shape that is flat in the axial direction and contacts the plate portion 20a. It is fitted between the outer peripheral surface of the boss portion 20b and the inner peripheral surface of the radial back yoke 28 in a state of contact, that is, in a state of contacting the inner bottom surface of the annular recess. The plate portion 20a of the base member 20 is formed with a groove portion 21 (see FIG. 6) that extends in a zigzag manner in the circumferential direction, and the groove portion 21 is covered from the axial direction by the axial back yoke 24. Thus, a coolant jacket 32 (see FIG. 2) is formed inside the first rotor body 12A to circulate the coolant in the circumferential direction while meandering in the radial direction (see the broken line in FIG. 6).

  The plurality of axial permanent magnets 22 are fitted into a gap between the outer peripheral surface of the boss portion 20 b and the inner peripheral surface of the radial back yoke 28, and are stacked on the axial back yoke 24. Each of the axial permanent magnets 22 has a substantially sector shape that is flat in the axial direction. These axial permanent magnets 22 are arranged such that the magnetic poles on the air gap side (axial direction (−) side) of adjacent magnets 22 are alternately different. As shown in FIG. 5A, each axial permanent magnet 22 is inserted into the gap, and the air gap side surface (magnetic exchange surface) is the axial end surface of the boss portion 20b and the radial end surface. It is flush with the axial end surface of the back yoke 28. That is, the step size between the axial end surface of the boss portion 20b and the axial end surface of the radial back yoke 28 and the axial end surface of the axial back yoke 24 is the same as the thickness of the axial permanent magnet 22. Is set.

  The plurality of radial permanent magnets 26 have a rectangular cross section having a thickness dimension equivalent to the axial dimension of the radial back yoke 28 and are formed in an arc shape in the axial direction. These radial permanent magnets 26 are arranged such that the magnetic poles on the air gap side of the adjacent magnets 26 (the air gap side with the first radial stator 6A) are alternately different.

  In the first rotor body 12A, the axial permanent magnet 22 and the radial permanent magnet 26 are disposed at the same rotational angle position as shown in FIG. 5B. That is, the circumferential length (arc length) of the radial permanent magnet 26 in the axial direction is a dimension corresponding to the central angle of the axial permanent magnet 22 which is a sector shape, and each of the radial permanent magnets 26 is outside the axial permanent magnet 22. Each radial permanent magnet 26 is arranged so that one radial permanent magnet 26 is positioned (outside in the radial direction of the first rotor body 12A).

  The axial permanent magnet 22 and the radial permanent magnet 26 arranged at the same angular position have the same magnetic poles on the air gap side. That is, the magnetic pole on the air gap side of the radial permanent magnet 26 arranged at the same rotation angle position as the axial permanent magnet 22 whose magnetic pole on the air gap side is N pole is N pole, and the magnetic pole on the air gap side is S. The magnetic pole on the air gap side of the radial permanent magnet 26 disposed at the same rotational angle position as the axial permanent magnet 22 is a south pole. Thereby, the magnetic flux formed between the axial permanent magnet 22 and the axial stator 4 and the magnetic flux formed between the radial permanent magnet 26 and the radial stators 6A and 6B influence each other (interference). And) inhibiting the generation of torque.

  The axial permanent magnet 22, the axial back yoke 24, the radial permanent magnet 26 and the radial back yoke 28 are integrally fixed to the base member 20 by a clamp member 30. The axial permanent magnet 22, the axial back yoke 24, the radial permanent magnet 26, and the radial back yoke 28 are fixed to the base member 20 with, for example, an adhesive, but the fixed state is reinforced by the clamp member 30. ing.

  As shown in FIG. 6, the clamp member 30 includes a base member 20, an axial permanent magnet 22, an axial back yoke 24, a radial permanent magnet 26, and a radial back yoke 28. Are sandwiched together from both sides in the axial direction. This reinforces the fixing strength of the axial permanent magnet 22 and the like with respect to the base member 20. In this example, the number of the axial permanent magnets 22 and the radial permanent magnets 26 is eight, and the axial permanent magnets 22 and the like are fixed to the base member 20 with eight clamp members 30.

  The clamp member 30 has a U-shape having a pair of arm portions 31a extending in the radial direction and a connecting portion 31b for connecting the arm portions 31a. As shown in FIGS. 5A, 5 </ b> B, and 6, the clamp member 30 includes a pair of radial permanent magnets 26 that are adjacent to each other in the circumferential direction of a pair of axial permanent magnets 22 that are adjacent to each other. These are attached to these so as to sandwich the circumferential end portion. As a result, the base member 20, the axial permanent magnet 22, the axial back yoke 24, the radial permanent magnet 26 and the radial back yoke 28 are integrally pressed from both axial sides by the clamp member 30.

  As shown in FIG. 8, stepped portions 22 a are formed at both ends in the circumferential direction of each axial permanent magnet 22. Similarly, stepped portions 26 a are formed at both ends in the circumferential direction of each radial permanent magnet 26. (Omitted in FIGS. 7 and 15). Further, as shown in FIGS. 6 and 7, groove portions 28a each having a width corresponding to the clamp member 30 are formed at positions corresponding to the clamp member 30 on both end surfaces of the radial back yoke 28. Groove portions 202 extending in the radial direction of the width corresponding to the clamp member 30 are formed at positions corresponding to the clamp member 30 in the end surface of the boss portion 20b of the base member 20, and the boss portion 20b on the side opposite to the boss portion is formed. Grooves 201 extending in the radial direction of the width corresponding to the clamp member 30 are formed at positions corresponding to the clamp member 30 in the surface. That is, the clamp member 30 engages with each of the step portions 22a and 26a while being interposed between the axial permanent magnets 22 adjacent in the circumferential direction and between the radial permanent magnets 26 adjacent in the circumferential direction, and The radial back yoke 28, the plate portion 20a, and the boss portion 20b are fitted into the groove portions 28a, 201, 202. As a result, as shown in FIGS. 5A and 5B, the surface of each clamp member 30 (each arm 31a and connecting portion 31b), the axial permanent magnet 22, the radial permanent magnet 26, and the radial back. The yoke 28 and the surface of the base member 20 (plate part 20a, boss part 20b) are flush with each other.

  Each arm portion 31a of the clamp member 30 is provided with a claw portion 301 that extends in the opposite direction to each tip. As shown in FIGS. 5A and 5B, these claw portions 301 protrude in the axial direction from the end surfaces of the base member 20 (plate portion 20a, boss portion 20b). As shown in FIG. 2, the claw portion 301 on the axial direction (+) side of each clamp member 30 is not shown in the figure formed on the spacer 17 in a state where the first rotor body 12 </ b> A is fixed to the rotating shaft 10. The claw portion 301 on the axial direction (−) side is inserted into the annular groove portion 101 (see FIG. 9) formed on the end surface of the main shaft portion 11 a of the rotating shaft 10. As a result, the clamp member 30 is prevented from coming off, and the base member 20, the axial permanent magnet 22, the axial back yoke 24, the radial permanent magnet 26, and the radial back yoke 28 are integrated with the clamp member 30. Has been.

  The structure of the first rotor body 12A is as described above. The structure of the second rotor main body 12B is the same as that of the first rotor main body 12A. However, as shown in FIG. 2, the second rotor main body 12B is opposite to the first rotor main body 12A, that is, the axial permanent magnet 22 is used. Is fixed to the rotary shaft 10 in a state in which is directed in the axial direction (+) side.

  Each axial permanent magnet 22 of the first rotor body 12A and each axial permanent magnet 22 of the second rotor body 12B are arranged at the same rotational angle position. That is, each axial permanent magnet 22 of the first rotor body 12A and each axial permanent magnet 22 of the first rotor body 12A face each other in the axial direction with the axial stator 4 interposed therebetween. However, the axial permanent magnets 22 facing each other have different magnetic poles on the air gap side. In other words, the axial permanent magnets 22 positioned at the same rotational angle position of the rotor main bodies 12A and 12B are magnetic poles having different magnetic poles on the air gap side. As a result, the axial stator 4 and the axial permanent magnets 22 of the rotor main bodies 12A and 12B on both sides thereof are inhibited from interfering with each other (interfering) to inhibit torque generation.

  Note that the coolant jacket 32 of each rotor body 12A, 12B can supply and discharge coolant such as oil through the rotary shaft 10. Specifically, as shown in FIG. 2 and FIG. 5B, the rotor-side liquid supply that opens to the base member 20 at a position facing the end surface of the main shaft portion 11 a of the rotary shaft 10 and communicates with the coolant jacket 32. The rotor side that opens to a position opposite to the end surface of the main shaft portion 11a and communicates with the coolant jacket 32 at a position opposite to the rotor side liquid supply passage 34 across the passage 34 and the through hole 14. A liquid discharge passage 35 is formed. On the other hand, the rotary shaft 10 is opened at positions on both end surfaces of the main shaft portion 11a and is opened at positions on both end surfaces of the main shaft portion 11a and the shaft side liquid supply passage 36 communicating with the rotor side liquid supply passage 34. A shaft side liquid discharge passage 37 communicating with the rotor side liquid discharge passage 35 is formed. Thus, after the coolant is supplied from the rotary shaft 10 to the coolant jacket 32 of the rotor main bodies 12A and 12B through the shaft-side liquid supply passage 36 and the rotor-side liquid supply passage 34, and flows through the rotor main bodies 12A and 12B. The rotor main body 12A, 12B is discharged to the rotary shaft 10 through the rotor side liquid discharge passage 35 and the shaft side liquid discharge passage 37.

  In the present embodiment, the coolant jacket 32 and the passages 34 to 37 of the rotor bodies 12A and 12B constitute the “coolant circulation passage” of the present invention.

  The axial stator 4 is disposed between the rotor main bodies 12A and 12B of the rotor 2.

  9 is a view in which the first rotor main body and the peripheral portion of the support plate 46 (outer diameter portion from the stepped portion) are removed from the rotating electric machine of FIG. 4, and FIG. 10 is a perspective view of the axial stator 4. 11 is a perspective view of the axial stator 4 with a support plate 46, which will be described later, removed.

  The axial stator 4 includes a plurality (twelve in this example) of stator cores 42 arranged in the circumferential direction, and a plurality of coils 44 of U phase, V phase, and W phase that are attached (wound) to each stator core 42 and arranged in the circumferential direction. An annular stator body 40 provided, a pair of support plates 46 that support the stator body 40 from both sides in the axial direction, and a first and a first that connect the pair of support plates 46 at positions inside and outside the stator body 40, respectively. Two cylindrical members 48 and 49.

  The stator core 42 includes a block-shaped core main body 43a, a support member 43b made of a non-magnetic material fixed to a side surface of the core main body 43a, and a cylindrical bobbin (not shown) made of an insulating material surrounding them. Have The core body 43a is formed by laminating and integrating a plurality of electromagnetic steel plates, and is formed in a trapezoidal shape when viewed in the axial direction. The coil 44 is attached (wound) to the stator core 42 from the outside of the support member 43b and the bobbin.

  The pair of support plates 46 are disk-shaped members formed of a nonmagnetic material (ceramic such as alumina, reinforced plastic, austenitic stainless steel, aluminum, or the like). The support plates 46 are connected and fixed to each other via the cylindrical members 48 and 49 in a state where the stator body 40 is sandwiched from both sides in the axial direction and the stator body 40 is supported.

  As shown in FIGS. 2 and 10, a step portion is formed on the outer side of the stator body 40 in the radial direction among the support plates 46, and the second cylindrical member 49 includes the support plates 46. It is located between the said level | step-difference part. As described above, the step portions are formed on the respective support plates 46, so that interference between the coils 58 of the radial stators 6A and 6B and the support plate 46, which will be described later, is avoided.

  As shown in FIG. 10, each support plate 46 includes a circular shaft hole 46 a through which the main shaft portion 11 a of the rotary shaft 10 passes. Each support plate 46 has an outer diameter dimension equivalent to the outer diameter of the case 8 and extends from the stator body 40 to the outer side in the radial direction (see FIG. 2). That is, the peripheral portion of each support plate 46 forms a flange portion of the axial stator 4.

  Each support plate 46 includes a plurality of window portions 46b having a shape corresponding to the core main body 43a around the shaft hole 46a. On the other hand, as shown in FIG. 2, each core main body 43a of the stator main body 40 protrudes outward in the axial direction from the end surface of the support member 43b, and each support is made so that the protruding portion fits into the window portion 46b. Plates 46 are stacked on both sides of the stator body 40. In this manner, the end of the core body 43a is fitted into the shaft hole 46a of the support plate 46, so that the end surface (magnetic exchange surface) of each stator core 42 directly faces the rotor bodies 12A and 12B. ing.

  A seal member that seals between each support plate 46 and the stator body 40 in a liquid-tight state is sandwiched between each support plate 46 and the stator body 40.

A first cylindrical member 48 is disposed on the radially inner side of the stator body 40, and a second cylindrical member 49 having a larger diameter than the first cylindrical member 48 is disposed on the radially outer side. The first and second cylindrical members 48 and 49 are formed of a nonmagnetic material (ceramic such as alumina, reinforced plastic, austenitic stainless steel, aluminum, or the like) similarly to the support plate 46. As shown in FIG. 2, the cylindrical members 48 and 49 are interposed between the support plates 46. Each support plate 46 is fixed to the first and second cylindrical members 48 and 49 from the outside in the axial direction by bolts not shown. As a result, the stator body 40 is supported by the support plates 46, and the annular stator space in which the coils 44 of the stator body 40 are accommodated in the axial stator 4, that is, both the support plates 46 and the first and second plates. A coolant jacket 45 (see FIG. 2) for circulating coolant is formed. An axial coolant introduction port P ₀₁ such as a pipe for introducing coolant into the coolant jacket 45 is provided at the top of the second cylindrical member 49, while cooling from the coolant jacket 45 is provided at the bottom. axial cooling outlet port P ₀₂ of the pipe or the like to derive the liquid is provided.

  The radial stators 6A and 6B (first radial stator 6A and second radial stator 6B) are respectively arranged on the radially outer sides of the rotor bodies 12A and 12B with a predetermined air gap (radial gap) therebetween. Specifically, the first radial stator 6A is disposed on the radially outer side of the first rotor body 12A, and the second radial stator 6B is disposed on the radially outer side of the second rotor body 12B.

  The structures of the radial stators 6A and 6B are the same. Here, the configuration of the first radial stator 6A will be described.

  FIG. 12 is a perspective view of the first radial stator 6A (6B). As shown in FIGS. 4 and 12, the first radial stator 6A includes a plurality of (in this example, twelve) core units 50 connected in the circumferential direction, and a cylindrical shape that supports the core units 50 from the radially outer side. The support ring 52 is configured in an annular shape.

  Each core unit 50 includes a split core 54, a cylindrical bobbin 56 that is mounted around the split core 54, and a coil 58 that is wound around the split core 54 from the outside of the bobbin 56.

  The divided core 54 constitutes a stator core of the first radial stator 6A. That is, as described above, the plurality of core units 50 are connected in the circumferential direction, whereby the divided cores 54 of the core units 50 cooperate to form an annular stator core.

  As shown in FIG. 4, the split core 54 has a back core portion 55 a that extends in the circumferential direction, and a teeth portion 55 b that extends from the center toward the radial center (rotor center). Has the shape of a mold. Although not shown in detail, the split core 54 is configured by laminating a predetermined number of electromagnetic steel plates formed in a substantially T shape in the axial direction, whereby the width of the radial permanent magnet 26 is increased. It has a thickness that is equal to or slightly smaller than (axial dimension / horizontal dimension in FIG. 2).

  At both ends in the circumferential direction of the back core portion 55a, connection portions (not shown) that can be connected to the back core portions 55a of the adjacent split cores 54 are formed. Thereby, the split cores 54 of the adjacent core units 50 are connected in the circumferential direction as shown in FIG.

  The bobbin 56 is formed of an insulating resin material, and is mounted on the outer peripheral surface of the bobbin 56 so as to surround the tooth portion 55b of the split core 54. At both ends of the bobbin 56, flanges 56a and 56b are formed, respectively. The flange portions 56a and 56b extend in the axial direction and the circumferential direction of the first radial stator 6A. Connection portions (not shown) that can connect the flange portions 56a and 56b of the adjacent bobbins 56 in a watertight state are formed at the circumferential ends of the flange portions 56a and 56b. Thereby, the bobbins 56 of the adjacent core units 50 are also connected in the circumferential direction as shown in FIG.

  As described above, the back core portions 55a of the adjacent split cores 54 are connected to each other, and the flange portions 56a and 56b of the adjacent bobbins 56 are connected to each other so that each core unit 50 is connected in the circumferential direction. Yes. And the support ring 52 which consists of insulators, such as a resin material, is externally fitted on the outer peripheral surface of the several core unit 50 connected in the circumferential direction in this way. Thus, a first radial stator 6A is configured in which a plurality of U-phase, V-phase, and W-phase coils 58 are arranged in the circumferential direction.

The axial ends of the flanges 56 a and 56 b of each bobbin 56 are fitted in a liquid-tight state in the groove portions of the case 8 and the support plate 46. As a result, the first radial stator 6A has an annular closed space in which the coil 58 of each core unit 50 is accommodated, that is, the case 8, the support plate 46, and both flanges 56a and 56b. A coolant jacket 53 (see FIG. 2) is formed. Then, the bobbin 56 of the core unit 50 located at the top of the first radial stator 6A, while the radial cooling fluid inlet port P ₁₁ such as a pipe for introducing the cooling liquid to the cooling liquid jacket 53 is connected , the bottom of the first radial stator 6A the bobbin 56 of the core unit 50 located (Figure 2, lower part)), coolant axial cooling outlet port P ₁₂ such as a pipe for deriving coolant from the jacket 53 Is provided. The ports P ₁₁ and P ₁₂ are held in the case 8.

For the radial stators 6A and 6B, the plurality of core units 50 connected in the circumferential direction correspond to the “stator body” of the present invention. The ports P ₁₁ and P ₁₂ and the above-described axial ports P ₀₁ and P ₀₂ correspond to the “coolant supply / discharge section” of the present invention.

  The structure of the first radial stator 6A is as described above. The structure of the second radial stator 6B is the same as that of the first radial stator 6A. However, as shown in FIG. 2, the second radial stator 6B is symmetrical to the first radial stator 6A with the axial stator 4 in between. It is facing.

  The case 8 is made of ceramic or fiber reinforced resin. As shown in FIGS. 1 and 2, the case 8 includes a first side case 8a located on the axial direction (+) side of the rotating electrical machine 1A and a second side case 8b located on the axial direction (−) side. Composed. The side cases 8a and 8b have the same configuration except for the orientation.

  Each of the side cases 8a and 8b includes a cylindrical peripheral wall portion 80 extending in the axial direction and an end surface portion 82 that closes one end thereof. The peripheral wall portion 80 and the end surface portion 82 are integrally formed of the same material. Yes. A shaft hole 82 a is formed at the center of the end surface portion 82, and the bearing 9 is fixed inside the end surface portion 82 concentrically with the shaft hole 82 a.

  Each side case 8a, 8b is attached to the axial stator 4 with the peripheral wall portions 80 facing each other. Specifically, as shown in FIG. 2, the rotating shaft 10 (support shaft portion 11d) is led out through the bearing 9 and the shaft hole 82a, and in this state, the peripheral wall portions 80 of the side cases 8a and 8b are axial. It abuts on the peripheral edge of the stator 4, that is, the peripheral edge of the support plate 46, and is fixed to the peripheral edge with a bolt (not shown).

  As shown in FIG. 2, the first radial stator 6A is sandwiched between the first side case 8a and the support plate 46 on the axial direction (+) side, and the second radial stator 6B is the second radial stator 6B. It is sandwiched between the side case 8b and the support plate 46 on the axial direction (−) side.

  Specifically, double circular grooves are formed on concentric circles around the rotation shaft 10 on the opposing surfaces of the end surface portion 82 of the first side case 8a and the support plate 46 on the axial direction (+) side. . The first radial stator 6A is connected to the end surface portion 82 of the first side case 8a in a state where the flange portions 56a, 56b (the axial ends thereof) of the bobbin 56 of the core unit 50 are fitted in the circular grooves, respectively. It is sandwiched between the support plate 46. Similarly, the second radial stator 6B is sandwiched between the end surface portion 82 of the second side case 8b and the support plate 46.

  The coils 58 of the first radial stator 6A and the coils 58 of the second radial stator 6B are positioned at the same angular position, and the coils 58 of the radial stators 6A and 6B and the coils of the axial stator 4 are arranged. 44 is located at the same angular position. Further, the coils 44 and 58 positioned at the same angular position are the same phase coils. That is, the stators 4, 6 A, and 6 B are surrounded by the case 8 so that the coils 44 and 58 are positioned at the same angular position and the coils 44 and 58 positioned at the same angular position are in the same phase. It is assembled in a state positioned in the direction.

[Function and effect]
According to the rotating electrical machine 1 </ b> A, the axial permanent magnets 22 and the radial permanent magnets 26 are individually provided on the rotor main bodies 12 </ b> A and 12 </ b> B of the rotor 2, and between the axial permanent magnet 22 and the axial stator 4. On the other hand, magnetic exchange is performed between the radial permanent magnet 26 and the radial stators 6A and 6B. That is, it is a structure in which permanent magnets (fields) are individually provided for axial and radial use. Therefore, the total magnetic exchange area can be increased as compared with the conventional structure in which permanent magnets (fields) are used in common for axial and radial use, and a margin for a reverse magnetic field received from the armature is increased. .

  Moreover, according to the rotating electrical machine 1A, good and stable magnetic flux formation is possible between the axial permanent magnet 22 and the axial stator 4, and between the radial permanent magnet 26 and the radial stators 6A and 6B. There is also an advantage that the generated torque can be effectively increased in combination with the increase in the magnetic exchange area as described above. That is, the axial permanent magnet 22 and the radial permanent magnet 26 are respectively arranged at the same rotational angle position of the rotor bodies 12A and 12B, and further the axial permanent magnet 22 and the radial permanent magnet 26 arranged at the same angular position. Since the magnetic poles on the air gap side are the same as each other, the magnetic flux formed between the axial permanent magnet 22 and the axial stator 4 and between the radial permanent magnet 26 and the radial stators 6A and 6B. It is suppressed that the magnetic flux formed on each other affects each other (interferes) and inhibits torque generation. The axial permanent magnets 22 of the first rotor body 12A and the axial permanent magnets 22 of the second rotor body 12B are arranged at the same rotational angle position, and the same rotor body 12A, 12B. Since the axial permanent magnets 22 at the rotational angle positions are different from each other in the air gap side, the axial permanent magnets 22 extend over the axial stator 4 and the axial permanent magnets 22 of the rotor bodies 12A and 12B on both sides thereof. And a stable magnetic flux is formed. Therefore, according to the rotating electrical machine 1A, it is possible to increase the total magnetic flux amount by increasing the magnetic exchange area and to form a favorable and stable magnetic flux, thereby effectively increasing the generated torque.

  Further, according to the rotating electrical machine 1A, the axial permanent magnet 22 and the radial permanent magnet 26 are in a state where the axial back yoke 24 and the radial back yoke 28, which are molded bodies made of soft magnetic metal powder, are fitted to each other. Since it is located behind, the magnetic flux path in the axial direction and the magnetic flux path in the radial direction can complement each other, and as a result, the total magnetic flux amount increases. Therefore, the generated torque can be effectively increased also in this respect.

In the rotating electrical machine 1A, the amount of heat generated by the axial and radial permanent magnets 22 and 26 and the coils 44 and 58 is expected to increase as the total amount of magnetic flux increases, resulting in a decrease in efficiency due to the generated heat. Is concerned. However, according to the rotating electrical machine 1 </ b> A, with respect to the rotor 2, the cooling liquid jacket 32 is formed in each of the rotor bodies 12 </ b> A and 12 </ b> B, and the cooling liquid can be circulated through the rotating shaft 10. The axial stator 4 and the radial stators 6A and 6B are also provided with annular coolant jackets 45 and 53 in which the coils 44 and 58 are accommodated, respectively, and the coolant introduction ports P ₀₁ and P ₁₁ and the coolant are provided. The coolant can be circulated through the introduction ports P ₀₂ and P ₁₂ . In particular, the coils 44 and 58 can be circulated while immersing them in the coolant. Therefore, it is possible to effectively remove the heat from the permanent magnets 22 and 26 and the coils 44 and 58, thereby suppressing a reduction in efficiency of the rotating electrical machine 1A due to the heat generation.

[Modifications, etc.]
The rotary electric machine 1A is an example of a preferred embodiment of an axial-radial composite gap type rotary electric machine according to the present invention, and a specific configuration thereof can be appropriately changed without departing from the gist of the present invention. For example, the following configuration may be employed.

  (1) The rotor 2 of the rotating electrical machine 1A includes two rotor main bodies 12A and 12B, but the number of rotor main bodies may be one. FIG. 13 shows a configuration example in the case of one rotor body. In the figure, for the sake of convenience, the reference numerals of the first rotor main body 12A and the first radial stator 6A of FIG. 2 are used as reference numerals of the rotor main body and the radial stator.

  In the rotating electrical machine 1B shown in FIG. 13, the second rotor body 12B and the second radial stator 6B of the rotating electrical machine 1A shown in FIG. 2 are omitted, and instead, the side opposite to the rotor body (axial direction (− ) Side) and a back yoke 5 is disposed. The back yoke 5 is a donut type (winding core) in which a strip-shaped electromagnetic steel sheet is wound around a rotating shaft 10 in a spiral shape, and has an inner diameter and an outer diameter substantially equal to the inner diameter and outer diameter of the stator body 40. Have. The back yoke 5 is positioned by being fitted into a groove for receiving the back yoke 5 provided on the case 8 and fixed to the peripheral portion of the support plate 46 with a bolt (not shown) to contact the stator body 40. To do. An insulating film is preferably sandwiched between the back yoke 5 and the core body 43a. When unevenness exists on the surface between the respective layers, it is possible to avoid an increase in iron loss due to non-uniform flow of magnetic flux between the layers. The specific structure of the back yoke 5 may be a structure other than the spiral shape. However, according to the spiral back yoke 5, a gap between the electromagnetic steel sheets is formed in the magnetic flux flow direction in the back yoke 5. Therefore, it is advantageous in forming a smooth magnetic flux flow and thus increasing the generated torque.

  (2) As shown in FIGS. 14A and 14B, the rotor 2 of the rotating electrical machine 1A includes an axial magnetic portion 29a between adjacent axial permanent magnets 22 and adjacent radials. The radial magnetic part 29 b may be disposed between the permanent magnets 26 for use.

  More specifically, each of the magnetic portions 29a and 29b is a molded body mainly composed of soft magnetic metal powder such as Fe, Fe-Si, and Fe-Ni as in the case of the back yokes 24 and 28. Then, both the magnetic parts 29a and 29b are formed integrally with the radial back yoke 28 as shown in FIG. That is, the radial back yoke 28 includes an annular back yoke main body portion 28a, and axial magnetic portions 29a and radial magnetic portions 29b provided at regular intervals in the circumferential direction thereof. The magnetic part 29a for radial use and the magnetic part 29b for radial use are integrally molded from the same material mainly composed of the soft magnetic metal powder.

  As shown in FIG. 15B, the axial magnetic portion 29a is provided on the one axial end surface of the back yoke main body 28a so as to protrude from the end surface in the axial direction. The axial magnetic portion 29a has a substantially sector shape extending toward the center of the back yoke body portion 28a, and an end portion (that is, a tip portion) on the center side is a circumference of the boss portion 20b of the base member 20. It is in contact with the surface. On the other hand, the radial magnetic portion 29b is provided so as to protrude radially outward from the outer peripheral surface of the back yoke body portion 28a.

  Then, as shown in FIG. 15B, the axial back yoke 24 is placed inside the back yoke main body 28a (back yoke main body 28a) so that it contacts the surface of the axial magnetic portion 29a on the side opposite to the air gap. The axial permanent magnets 22 are arranged between the adjacent axial magnetic portions 29a and stacked on the axial back yoke 24, and each of the radial permanent magnets 26 is interposed between the adjacent radial magnetic portions 29b. Is arranged. In this state, it is integrated with the circumferential end of the axial permanent magnet 22 and the axial magnetic portion 29a adjacent to each other and the circumferential end of the radial permanent magnet 26 and the radial magnetic portion 29b adjacent to each other. A clamp member 30 is attached. With this configuration, as shown in FIGS. 14A and 14B, the base member 20, the axial permanent magnet 22, the axial back yoke 24, the radial permanent magnet 26, and the radial back yoke 28 include the clamp member. 30 is integrated.

  According to the rotor main bodies 12A and 12B shown in FIGS. 14A and 14B, the axial magnetic portion 29a made of a soft magnetic material is disposed between the adjacent axial permanent magnets 22 as described above. Similarly, since the radial magnetic portion 29b made of a soft magnetic material is disposed between the adjacent radial permanent magnets 26, the reluctance torque increases in both the axial direction and the radial direction. Therefore, the generated torque can be increased more effectively in the rotating electrical machine 1A. In particular, an increase in reluctance torque is advantageous for securing torque in a high rotation range.

  The configuration of the rotor 12 shown in FIGS. 14A and 14B is also applicable to the rotating electrical machine 1B shown in FIG. 14A and 14B, the magnetic portions 29a and 29b are provided integrally with the radial back yoke 28. Of course, the magnetic portions 29a and 29b may be separate from the radial back yoke 28. Good.

  (3) In the rotating electrical machines 1A and 1B, the axial back yoke 24 and the radial back yoke 28 are individually provided. However, they may be integrally molded.

1A, 1B Axial-radial composite gap type rotating electrical machine 2 Rotor 4 Axial stator 6A First radial stator 6B Second radial stator 8 Case 8a First side case 8b Second side case 10 Rotating shaft 12A First rotor body 12B Second rotor Body 14 Through-hole 22 Axial permanent magnet 24 Axial back yoke 26 Radial permanent magnet 28 Radial back yoke

Claims (7)

A rotor comprising a rotating shaft and a rotor body rotating with the rotating shaft;
An axial stator including a plurality of coils arranged in the rotation direction of the rotation shaft, and disposed with a predetermined air gap in the axial direction of the rotation shaft with respect to the rotor body;
A radial stator including a plurality of coils arranged in the rotation direction of the rotation shaft, and disposed at a predetermined air gap outside the rotor body in the radial direction;
The rotor body is a permanent magnet that is arranged opposite to the axial stator and performs magnetic exchange with the axial stator, and a permanent magnet different from the axial permanent magnet, An axial-radial composite gap type rotating electrical machine, comprising: a plurality of radial permanent magnets arranged opposite to the radial stator and performing magnetic exchange with the radial stator. In the axial-radial composite gap type rotating electrical machine according to claim 1,
The rotor includes a first rotor main body and a second rotor main body arranged on both sides of the axial stator as a rotor main body, and the axial-radial composite gap type rotary electric machine. In the axial-radial composite gap type rotating electrical machine according to claim 1 or 2,
The axial-radial composite gap type rotating electric machine, wherein the axial permanent magnet and the radial permanent magnet are respectively arranged at the same rotational angle position of the rotor body. In the axial-radial composite gap type rotating electrical machine according to claim 3,
The axial-radial composite gap type rotating electric machine characterized in that the axial permanent magnet and the radial permanent magnet arranged at the same angular position have the same magnetic pole on the air gap side. In the axial-radial composite gap type rotating electrical machine according to any one of claims 1 to 4,
The rotor is provided with an axial-radial composite gap type rotary electric machine characterized in that the rotor includes a coolant circulation passage for circulating coolant through the rotor shaft to the rotor body. In the axial-radial composite gap type rotating electrical machine according to any one of claims 1 to 5,
Each of the axial stator and the radial stator includes an annular stator body including a stator core and the coil mounted on the stator core.
The rotating electrical machine includes an annular closed space that houses the coil of at least one of the stator bodies of the axial stator and the radial stator, and a coolant supply that can supply and discharge the coolant to and from the closed space. An axial-radial composite gap type rotating electrical machine characterized by comprising an exhaust part. In the axial-radial composite gap type rotating electrical machine according to any one of claims 1 to 6,
A case in which the rotor, the axial stator and the radial stator are accommodated;
The axial stator includes an annular stator body including a stator core and the coil mounted on the stator core, and is assembled to the stator body from both sides in the axial direction so as to extend radially outward of the stator body. An axial-radial composite gap type rotating electrical machine comprising: a pair of existing support plates, wherein a peripheral portion of each of the support plates is fixed to the case, and is assembled to the case.

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