JP2023149000A - Rotary electric machine, method of manufacturing rotary electric machine, air blower, compressor, refrigeration device and vehicle - Google Patents

Abstract

To provide a technique capable of more appropriately supporting an iron core of a rotary electric machine.SOLUTION: A claw pole motor 1 according to an embodiment of the present disclosure includes: a stator core 210 having the inner circumferential surface extending in the axial direction around a rotation axis AX; a tubular support member 24 extending in the axial direction so as to be along the inner peripheral surface of a stator core 210; and a protrusion 24a which is provided on a part of the support member 24 in the axial direction, protrudes outward in the radial direction, and restricts the axial movement of the stator core 210 by coming into contact with the stator core 210 in the axial direction.SELECTED DRAWING: Figure 9

Description

The present disclosure relates to rotating electric machines and the like.

Conventionally, a structure is known in which a rotor and a stator of a rotating electric machine are supported from the inside in the radial direction (see, for example, Patent Document 1).

JP2007-49844

By the way, for example, if the iron core of a rotor or stator is supported with a loose fit by a support member on the inside in the radial direction, play may occur in the axial position of the iron core. For example, if the iron core of the rotor or stator is supported in a tight-fitting state by a supporting member radially inside the iron core, the movement of the iron core in the axial direction can be restricted, but the inner peripheral surface of the iron core A strong frictional force and a force that pushes the inner diameter apart act. As a result, the core may be damaged in some cases.

An object of the present disclosure is to provide a technique that can more appropriately support the core of a rotating electrical machine.

In one embodiment of the present disclosure,
an iron core having an inner circumferential surface extending in the axial direction around the rotation axis;
a tubular first member extending in the axial direction along the inner circumferential surface of the iron core;
a first regulating portion provided in a part of the first member in the axial direction, protruding outward in the radial direction, and regulating movement of the iron core in the axial direction by coming into contact with the iron core in the axial direction; prepare,
A rotating electric machine is provided.

According to the present embodiment, the first restricting portion provided in the tubular first member comes into contact with the iron core in the axial direction, so that the first member restricts the movement of the iron core in the axial direction. can be supported from the inside in the radial direction. Therefore, for example, it is possible to suppress a situation in which a strong frictional force or a force that expands the inner diameter acts on the inner circumferential surface of the iron core. Therefore, the iron core of the rotating electric machine can be supported more appropriately.

Furthermore, in the above embodiment,
a stator including the iron core;
The rotor may be rotatably disposed outside the stator in the radial direction.

Furthermore, in the above embodiment,
The iron core may be formed of a dust core.

Furthermore, in the above embodiment,
The first regulating portion may be provided so as to abut both axial end portions of the iron core from the outside in the axial direction.

Furthermore, in the above embodiment,
a stator including a winding wound in an annular shape and a claw-pole iron core provided so as to surround the winding;
and a rotor disposed radially outside the stator.

Furthermore, in the above embodiment,
The stator is
a first stator unit including the winding and the iron core;
a second stator unit that includes the winding and the iron core and is stacked in the axial direction with respect to the first stator unit;
an interphase member disposed adjacently between the first stator unit and the second stator unit in the axial direction, and having an inner circumferential surface larger in radial dimension than the inner circumferential surface of the iron core; and,
The first regulating portion may regulate movement of the interphase member in a radial direction by contacting an inner circumferential surface of the interphase member.

Furthermore, in the above embodiment,
A corner between the axial end face and the inner circumferential face of the iron core may be chamfered.

Furthermore, in the above embodiment,
The iron core may include a first recess that is provided on the inner circumferential surface of the core and that engages and abuts the first restricting portion in the axial direction.

Furthermore, in the above embodiment,
The side surface of the first recess may be formed to form an obtuse angle with respect to the inner circumferential surface of the iron core.

Furthermore, in the above embodiment,
A tubular second member may be provided, which is provided inside the first member in the radial direction and holds a bearing of the rotating shaft.

Furthermore, in the above embodiment,
a second recess provided in the inner peripheral surface of the iron core;
A second regulating portion is provided on the first member, protrudes outward in the radial direction, and engages with the second recess and abuts in the circumferential direction, thereby regulating movement of the iron core in the circumferential direction. Good too.

Additionally, in other embodiments of the present disclosure,
forming the first regulating portion by expanding the first member after inserting the first member axially inside the core in the radial direction;
A method of manufacturing the above-described rotating electric machine is provided.

In still other embodiments of the present disclosure,
Equipped with the above-mentioned rotating electric machine,
A blower is provided.

In still other embodiments of the present disclosure,
Equipped with the above-mentioned rotating electric machine,
A compressor is provided.

In still other embodiments of the present disclosure,
Equipped with the above-mentioned rotating electric machine,
Refrigeration equipment is provided.

In still other embodiments of the present disclosure,
Equipped with the above-mentioned rotating electric machine,
Vehicle provided.

According to the embodiment described above, the iron core of the rotating electrical machine can be supported more appropriately.

It is a perspective view showing an example of a claw pole motor (rotor). It is a perspective view showing an example of a stator. FIG. 7 is a cross-sectional view (a cross-sectional view of a cross section perpendicular to the axial direction viewed from the axial direction) showing another example of the rotor. FIG. 2 is an exploded view showing a first example of a stator unit (stator core). FIG. 3 is an exploded view showing a second example of a stator unit (stator core). It is a perspective view which shows the 3rd example of a stator unit (stator core). It is an exploded view which shows the 3rd example of a stator unit (stator core). FIG. 7 is a perspective view showing another example of the stator. FIG. 2 is a longitudinal cross-sectional view (a cross-sectional view of a cross section parallel to the axial direction viewed from the radial direction) showing a first example of a support structure for the stator core. FIG. 7 is a longitudinal cross-sectional view showing a second example of a stator core support structure. FIG. 7 is a vertical cross-sectional view showing a third example of a stator core support structure. It is a longitudinal cross-sectional view which shows the 4th example of the support structure of a stator core. It is a longitudinal cross-sectional view which shows the 5th example of the support structure of a stator core. It is a perspective view which shows the 6th example of the support structure of a stator core. FIG. 7 is a cross-sectional view showing a sixth example of a stator core support structure. It is a figure showing an example of an air conditioner. FIG. 1 is a diagram showing an example of a vehicle.

Embodiments will be described below with reference to the drawings.

[Basic configuration of claw pole motor]
The basic configuration of the claw pole motor 1 according to this embodiment will be explained with reference to FIGS. 1 to 8.

FIG. 1 is a perspective view showing an example of a claw pole motor 1 (rotor 10). FIG. 2 is a perspective view showing an example of the stator 20 of the claw pole motor 1. Specifically, FIG. 2 is a diagram in which the rotor 10 (rotor core 11, permanent magnet 12, and rotating shaft member 13) is not shown in FIG. 1. FIG. 3 is a cross-sectional view of another example of the rotor 10 in a plane perpendicular to the rotation axis AX. FIG. 4 is an exploded view showing a first example of the stator unit 21 (stator core 210). FIG. 5 is an exploded view showing a second example of the stator unit 21 (stator core 210). FIG. 6 is a perspective view showing a third example of the stator unit 21 (stator core 210). FIG. 7 is an exploded view showing a third example of the stator unit 21 (stator core 211). FIG. 8 is a perspective view showing another example of the stator 20.

Note that in FIG. 1, illustration of a connecting member 14 (see FIGS. 9 to 13), which will be described later, is omitted in order to expose the internal structure of the rotor 10.

As shown in FIGS. 1 and 2, a claw pole motor (also referred to as a "claw pole rotating electrical machine") 1 is of an outer rotor type and is driven by armature currents of multiple phases (three phases in this example). Ru.

Note that the claw pole motor 1 may be of an inner rotor type. Further, the claw pole motor 1 may be driven by a single-phase or two-phase armature current, or may be driven by a four-phase or more armature current.

As shown in FIGS. 1 to 5, the claw pole motor 1 includes a rotor 10, a rotating shaft member 13, a connecting member 14, a stator 20, a supporting member 24, and a fixing member 30.

As shown in FIG. 1, a rotor (also referred to as "rotor") 10 is disposed outside the stator 20 in the radial direction (hereinafter simply "radial direction") of the claw pole motor 1, and It can rotate around the center AX. The rotor 10 is a permanent magnet field and includes a rotor core 11 and a permanent magnet 12.

Note that, in the case of an inner rotor type, the rotor 10 is arranged radially inside the stator 20. Moreover, the rotor 10 may have any form as long as the claw pole motor 1 can function as a rotating electric machine. For example, the rotor 10 does not need to have a permanent magnet as in the case where the claw pole motor 1 is an induction motor, a reluctance motor, or the like.

The rotor core (also referred to as "rotor iron core") 11 has, for example, a substantially cylindrical shape, and is arranged so that the rotational axis AX of the claw pole motor 1 and the cylindrical axis substantially coincide with each other. "Omitted" is intended to allow for manufacturing errors, for example, and will be used hereinafter with the same intent. Further, the rotor core 11 has approximately the same length as the stator 20 in the axial direction (hereinafter simply referred to as the "axial direction") along the rotation axis AX of the claw pole motor 1. The rotor core 11 is formed of, for example, a soft magnetic material such as an electromagnetic steel plate, cast iron, or a dust core. For example, as shown in FIG. 1, the rotor core 11 is composed of one member in the axial direction. Further, the rotor core 11 may be composed of a plurality of rotor cores stacked in the axial direction, for example. For example, the rotor core 11 may be composed of three rotor cores corresponding to each of stator units 21A to 21C, which will be described later.

The permanent magnet 12 generates a magnetic field that interlinks with the stator 20 as an armature. The permanent magnet 12 is, for example, a neodymium sintered magnet or a ferrite magnet.

For example, as shown in FIG. 1, a plurality of permanent magnets 12 (20 in this example) are arranged on the inner peripheral surface of the rotor core 11 at approximately equal intervals in the circumferential direction. That is, the claw pole motor 1 may be of a surface permanent magnet (SPM) type.

Further, as shown in FIG. 3, the permanent magnets 12 are, for example, embedded in the rotor core 11, and are approximately equal in the circumferential direction (hereinafter simply referred to as the "circumferential direction") with the rotation axis AX as the reference (center). A plurality of them (16 in this example) may be arranged at intervals. That is, the rotor 10 may be of an interior permanent magnet (IPM) type.

The permanent magnet 12 has different magnetic poles magnetized on both radial end faces. Further, the two permanent magnets 12 that are adjacent to each other in the circumferential direction are magnetized with different magnetic poles on the inside in the radial direction facing the stator 20. Therefore, at the same axial position, on the radially outer side of the stator 20, in the circumferential direction, there is a permanent magnet 12 magnetized with an N pole magnetized on the radially inner side, and an S pole magnetized on the radially inner side. Magnetized permanent magnets 12 are arranged alternately.

Further, the plurality of permanent magnets 12 arranged in the circumferential direction may be replaced with ring magnets or plastic magnets in which different magnetic poles are arranged alternately in the circumferential direction on the inner surface in the radial direction, similar to the plurality of permanent magnets 12. good. In this case, an annular (approximately cylindrical) permanent magnet (ring magnet) may be used that is magnetized with a polar anisotropic magnetization orientation so that magnetic poles that alternate in the circumferential direction appear on the inner peripheral surface. .

The plurality of permanent magnets 12 arranged in the circumferential direction are aligned with the axis of the rotor 10 so as to face in the radial direction all the stator units 21 (stator units 21A to 21C) stacked in the axial direction, which will be described later. It is arranged in a range extending from one end of the direction to the other end. Thereby, the permanent magnet 12 can apply a magnetic field to all the stator units 21.

For example, the plurality of permanent magnets 12 arranged in the circumferential direction are arranged at substantially the same circumferential position in the axial range corresponding to all the stator units 21 . In this case, the plurality of permanent magnets 12 arranged in the circumferential direction may each be composed of one magnet member in the range from one end to the other end of the rotor 10, or may be divided into a plurality of magnet members in the axial direction. It may be configured in such a way that For example, the permanent magnet 12 at a certain circumferential position is composed of three magnet members corresponding to the number of laminated members of the rotor core 11. In the latter case, the plurality of magnet members constituting the permanent magnet 12 divided in the axial direction are all magnetized with the same magnetic pole on the inside in the radial direction facing the stator 20. As described above, the same may apply to the positions of the magnetic poles in the circumferential direction when a ring magnet or a plastic magnet configured of one member in the circumferential direction is employed.

Further, the plurality of permanent magnets 12 arranged in the circumferential direction may be arranged so that the positions in the circumferential direction differ each time the stator units 21 facing each other in the radial direction are switched in the axial direction. Specifically, the permanent magnets 12 facing each of the two stator units 21 adjacent in the axial direction are rotated in the circumferential direction by an angle θe [°] defined by the following equation (1) in electrical angle. It is arranged so that it shifts. As described above, the same may apply to the positions of the magnetic poles in the circumferential direction when a ring magnet or a plastic magnet configured of one member in the circumferential direction is employed.

θe=360/M...(1)

Note that M is the number of phases of AC power (armature current) that drives the claw pole motor 1.

For example, as shown in FIG. 2, when the claw pole motor 1 is driven by three-phase alternating current (M=3), the electrical angle θe is 120°.

In addition, in the circumferential direction, when a plastic magnet composed of one member is employed, the rotor core 11 may be omitted. In addition, an annular (approximately cylindrical) permanent magnet is constructed of one member in the circumferential direction and is magnetized with polar anisotropic magnetization orientation so that different magnetic poles appear alternately in the circumferential direction on the inner circumferential surface ( If a ring magnet) is employed, the rotor core 11 may be omitted.

The rotating shaft member 13 has, for example, a substantially cylindrical shape that is elongated in the axial direction, and is arranged so that the rotational axis AX of the claw pole motor 1 and the cylindrical axis substantially coincide with each other. For example, as shown in FIG. 2, the rotating shaft member 13 is provided so as to extend in the axial direction through a hollow portion (through hole 210D, which will be described later) inside the stator 20 in the radial direction. Further, the rotating shaft member 13 may be provided so as to extend in the axial direction and be offset in the axial direction from the stator 20.

The rotating shaft member 13 is rotatably supported, for example, by bearings 25 and 26 provided at both ends of the support member 24 in the axial direction (see FIGS. 9 to 15). As described later, the support member 24 is fixed to the fixed member 30. Thereby, the rotation shaft member 13 can rotate around the rotation axis AX with respect to the fixed member 30. The rotating shaft member 13 is connected, for example, at an end opposite to the end of the claw pole motor 1 on the fixed member 30 side in the axial direction (hereinafter referred to as the "tip end of the claw pole motor 1" for convenience). It is connected to the rotor core 11 via a member 14 (see FIGS. 9 to 13).

As described above, the connecting member 14 connects the rotor core 11, the permanent magnet 12, and the rotating shaft member 13 (see FIGS. 9 to 13). The connecting member 14 has, for example, a generally disk shape that closes the generally cylindrical open end of the rotor core 11 . As a result, the rotor core 11 and the permanent magnet 12 fixed to the inner peripheral surface of the rotor core 11 rotate around the rotation axis AX of the claw pole motor 1 with respect to the fixed member 30 in accordance with the rotation of the rotation shaft member 13. be able to.

As shown in FIGS. 1 and 2, a stator (also referred to as "stator") 20 is arranged inside the rotor 10 (rotor core 11 and permanent magnets 12) in the radial direction. The stator 20 is an armature, and includes a plurality (in this example, three) of claw-pole stator units 21, a plurality of (in this example, two) interphase members 22, an end member 23, and a support member 24.

In addition, in the case of an inner rotor type, the stator 20 is arranged on the outside of the rotor 10 in the radial direction. Further, the interphase member 22, the end member 23, and the support member 24 are not essential, and may be omitted as appropriate.

As shown in FIGS. 4 to 7, stator unit 21 includes a stator core 210 and a coil 212.

A stator core (also referred to as a "stator core") 210 is provided so as to surround the coil 212. Stator core 210 includes a pair of stator cores 211.

Stator core 211 is formed of, for example, a soft magnetic material such as a dust core. Furthermore, the surface of the stator core 211 may be insulated using an oxide film or the like, for example. Stator core 211 includes a yoke portion 211A, a plurality of claw magnetic poles (also referred to as “claw poles”) 211B, a yoke portion 211C, and a hole portion 211D.

The yoke portion 211A is provided so as to cover the end of the coil 212 in the axial direction. The yoke portion 211A has a substantially annular shape when viewed along the axial direction, and has a predetermined thickness in the axial direction.

The plurality of claw magnetic poles 211B are arranged at approximately equal intervals in the circumferential direction on the outer peripheral surface of the yoke portion 211A, and each protrudes radially outward from the outer peripheral surface of the yoke portion 211A. For example, the number of claw magnetic poles 211B is the same as the number of magnetic poles of the permanent magnets 12 arranged circumferentially on the radially inner surface of the opposing rotor 10. The claw magnetic pole 211B includes a claw magnetic pole portion 211B1.

The claw magnetic pole part 211B1 has a predetermined width in the circumferential direction, a thickness in the axial direction that is about the same as the axial thickness of the yoke part 211A, and a predetermined length in the radial direction from the outer peripheral surface of the yoke part 211A. protrude in a way that only extends.

Further, the claw magnetic pole 211B includes a claw magnetic pole portion 211B2. This makes it possible to ensure a relatively large opposing area between the rotor 10 and the magnetic pole surface of the claw pole 211B that is magnetized by the armature current of the coil 212. Therefore, the output torque of the claw pole motor 1 can be relatively increased, and the output of the claw pole motor 1 can be improved.

The claw magnetic pole portion 211B2 protrudes from the tip of the claw magnetic pole portion 211B1 toward the other of the pair of stator cores 211 in the axial direction by a predetermined length. For example, as shown in FIGS. 4, 6, and 7, the claw magnetic pole portion 211B2 may have a constant width regardless of the distance from the claw magnetic pole portion 211B1. Further, for example, as shown in FIG. 5, the claw magnetic pole portion 211B2 may have a tapered shape whose width becomes narrower as it moves away from the claw magnetic pole portion 211B1 in the axial direction.

Note that the claw magnetic pole portion 211B2 may be omitted.

The yoke portion 211C is configured such that a portion near the inner circumferential surface of the yoke portion 211A protrudes toward the other of the pair of stator cores 211 by a predetermined amount, and functions as a partition wall that surrounds the inside of the coil 212 in the radial direction.

For example, as shown in FIGS. 4 and 5, the yoke portion 211C has an annular shape with a smaller outer diameter than the yoke portion 211A when viewed along the axial direction. As a result, the tips of the yoke portions 211C abut each other, and a yoke portion 210C that covers the inside of the coil 212 in the radial direction is formed in the stator core 210 by the pair of yoke portions 211C. A space for accommodating the coil 212 is formed in the stator core 210 between the yoke portions 211A at both ends in the axial direction and the claw magnetic poles 211B (claw magnetic pole portions 211B1). In this case, the pair of stator cores 211 are connected by mating surfaces that face each other in the axial direction, in other words, mating surfaces that are perpendicular to the axial direction. Further, in this case, twice the amount of protrusion of the yoke portion 211C from the yoke portion 211A is configured to be equal to or larger than the amount of protrusion of the claw magnetic pole portion 211B2 from the claw magnetic pole portion 211B1. Thereby, when the pair of stator cores 211 are connected, the tips of the claw magnetic pole portions 211B2 can be prevented from protruding from both end surfaces of the pair of stator cores 211 in the axial direction.

Further, for example, as shown in FIGS. 6 and 7, yoke portions 211A and 211C may be provided such that a pair of stator cores 211 are connected at surfaces facing each other in the radial direction and the circumferential direction. Specifically, the yoke portion 211A includes yoke portions 211A1 and 211A2. The yoke portion 211A1 corresponds to a connecting portion of the yoke portion 211A with the base end of the radially outer claw magnetic pole 211B, and may have a substantially annular shape when viewed along the axial direction. Further, the yoke portion 211A2 corresponds to a connecting portion with the base end of the radially inner yoke portion 211C in the yoke portion 211A, and protrudes radially inward from the inner surface of the yoke portion 211A1, and extends along the axial direction. It may have a fan shape when viewed from above. In addition, a plurality of yoke parts 211A2 (four in this example) are arranged at equal intervals in the circumferential direction, and the shape of the notch between two circumferentially adjacent yoke parts 211A2 when viewed in the axial direction is The yoke portion 211A2 is configured to have substantially the same shape as viewed in the axial direction. The yoke portion 211C is provided in such a manner that it projects from each of the plurality of yoke portions 211A2 in the axial direction toward the other stator core 211. Thereby, the pair of stator cores 211 can be connected in such a way that the tip of the yoke portion 211C fits into a notch between two circumferentially adjacent yoke portions 211A2 of the other stator core 211. In this case, stator core 210 is formed with yoke portions 210C that cover the inside of coil 212 in the radial direction by yoke portions 211C that are fitted alternately in the circumferential direction of the pair of stator cores 211.

The hole 211D is formed by the inner peripheral surfaces of the yoke portion 211A and the yoke portion 211C, and is provided so as to penetrate in the axial direction.

For example, as shown in FIGS. 4 and 5, the tips of the yoke portions 211C of the pair of stator cores 211 come into contact with each other, so that the holes 211D communicate with each other. A through hole 210D is formed.

For example, as shown in FIGS. 6 and 7, the stator core 210 is provided with a through hole that passes through the stator core 210 in the axial direction by the inner circumferential surfaces of the yoke portions 211A and 211C that are fitted alternately in the circumferential direction of the pair of stator cores 211. A hole 210D is formed.

The coil (also referred to as "winding wire") 212 is a conductive wire wound in an annular shape when viewed along the axial direction, approximately centered on the axis of the stator 20, that is, the rotational axis AX of the claw pole motor 1. It is composed by being turned. For example, the conductive wire of the coil 212 may be wound in a plurality of layers in the axial direction, may be wound in a plurality of rows in the radial direction, or may be wound in a plurality of layers in the axial direction. and may be wound so as to form a plurality of rows in the radial direction. Further, the conducting wire of the coil 212 is, for example, a round wire with a circular cross section. Further, the conducting wire of the coil 212 may be, for example, a square wire or a flat wire with a rectangular cross section. When coils 212 of multiple phases (three phases in this example) are connected to each other in a Y connection (star connection), one end of the coil 212 is electrically connected to an external terminal, and the other end is connected to a neutral point. is electrically connected to. Further, for example, when the coils 212 of multiple phases are connected with each other in a Δ connection (delta connection), one end of the coil 212 is electrically connected to one external terminal (external terminal of the same phase) of the claw pole motor 1. The other end is electrically connected to another external terminal (an external terminal of a different phase) of the claw pole motor 1. Coil 212 is arranged between a pair of stator cores 211 (yoke portion 211A) in the axial direction. Further, the coil 212 is configured such that the inner circumferential portion thereof is radially outer than the yoke portions 211C of the pair of stator cores 211, and the outer circumferential portion thereof is radially inner than the claw magnetic pole portions 211B2 of the pair of stator cores 211. It is wrapped around.

Note that an insulating portion is arranged between the stator core 211 and the conductive wire of the coil 212 to electrically insulate the stator core 211 and the conductive wire of the coil 212. The insulating portion is, for example, insulating paper, a resin-molded insulator, silicone rubber, a bobbin, a resin mold for the stator core 211 or the coil 212, and the like, which is arranged between the stator core 211 and the coil 212. Further, the insulating portion may be, for example, a resin insulating film provided on the surface of the conductive wire of the coil 212.

As shown in FIG. 2, the pair of stator cores 211 are combined so that the claw magnetic poles 211B of one stator core 211 and the claw magnetic poles 211B of the other stator core 211 are alternately arranged in the circumferential direction. Furthermore, when an armature current flows through the annular coil 212, the claw magnetic poles 211B formed on one of the pair of stator cores 211 and the claw magnetic poles 211B formed on the other are magnetized into different magnetic poles. As a result, in the pair of stator cores 211, one claw magnetic pole 211B protruding from one stator core 211 has a different magnetic pole from the other claw magnetic pole 211B adjacent to each other in the circumferential direction and protruding from the other stator core 211. Therefore, due to the armature current flowing through the coil 212, N-pole claw magnetic poles 211B and S-pole claw magnetic poles 211B are alternately arranged in the circumferential direction of the pair of stator cores 211 at a certain moment. In other words, the armature current is alternating current, and the claw magnetic poles 211B exhibit magnetic poles that are alternately out of phase by 180° in the circumferential direction.

In the case of the inner rotor type, the yoke portion 210C (yoke portion 211C) of the claw pole type stator core 210 is provided at the outer end in the radial direction, and the claw magnetic poles 211B extend radially inward from the yoke portion 211C. It is set up like this.

As shown in FIGS. 2 and 8, the plurality of stator units 21 are stacked in the axial direction.

The plurality of stator units 21 include stator units 21 for a plurality of phases (in this example, three phases). Specifically, the plurality of stator units 21 include a stator unit 21A corresponding to the U phase, a stator unit 21B corresponding to the V phase, and a stator unit 21C corresponding to the W phase. The plurality of stator units 21 are arranged in the following order from the tip of the claw pole motor 1: a stator unit 21A corresponding to the U phase, a stator unit 21B corresponding to the V phase, and a stator unit 21C corresponding to the W phase. Laminated.

For example, as shown in FIG. 2, stator units 21 of different phases adjacent to each other in the axial direction are arranged such that their positions in the circumferential direction differ from each other by the above-mentioned electrical angle θe [°]. Specifically, the stator units 21A to 21C are arranged such that adjacent stator units 21 have circumferential positions that differ by 120 degrees in electrical angle. In this case, the plurality of permanent magnets 12 arranged in the circumferential direction are arranged at substantially the same circumferential position in the axial range corresponding to all the stator units 21 .

Moreover, as shown in FIG. 8, stator units of multiple phases stacked in the axial direction may be arranged so that the positions in the circumferential direction are the same. In this case, the permanent magnets 12 facing each of the two axially adjacent stator units 21 are arranged so as to be shifted in the circumferential direction by an electrical angle θe [°], as described above.

Note that the claw pole motor 1 may have a plurality of stator units 21 of the same phase. For example, two stator units 21 corresponding to the U phase, two stator units 21 corresponding to the V phase, and two stator units 21 corresponding to the W phase may be stacked in this order in the axial direction. . Furthermore, as described above, the claw pole motor 1 may be driven by a single-phase or two-phase armature current, or may be driven by a four-phase or more armature current. In this case, stator units 21 of a number equal to the number of phases multiplied by the number of stator units 21 for each phase are stacked in the axial direction.

The interphase member 22 is provided between stator units 21 of different phases adjacent to each other in the axial direction. The interphase member 22 is, for example, a non-magnetic material. Thereby, a predetermined distance can be secured between the two stator units 21 of different phases, and magnetic flux leakage between the two stator units 21 of different phases can be suppressed. The interphase member 22 includes interphase members 22A and 22B.

The interphase member 22A is provided between the U-phase stator unit 21A and the V-phase stator unit 21B, which are adjacent in the axial direction. The interphase member 22A has, for example, a substantially cylindrical shape (substantially disk shape) with a predetermined thickness, and a through hole that penetrates in the axial direction is formed in the radial center portion. For example, the through hole has a substantially circular shape with a diameter that is the same as or larger than the hole 211D of the stator core 211 when viewed along the axial direction. Hereinafter, the same may be applied to the interphase member 22B.

The interphase member 22B is provided between the V-phase stator unit 21B and the W-phase stator unit 21C, which are adjacent in the axial direction.

The end member 23 is provided at an end in the axial direction of the claw pole motor 1 of the plurality of stacked stator units 21.

For example, as shown in FIG. 2, the end member 23 is provided at the tip of the claw pole motor 1. Specifically, the end member 23 is provided so as to be in contact with the end surface of the stator unit 21A on the side opposite to the side facing the stator unit 21B in the axial direction. The end member 23 has, for example, a substantially cylindrical shape (substantially disk shape) with a predetermined thickness, and a through hole penetrating in the axial direction is formed in the center portion in the radial direction. For example, the through hole has a substantially circular shape with a diameter that is the same as or larger than the hole 211D of the stator core 211 when viewed along the axial direction. The end member 23 is, for example, a non-magnetic material. Thereby, magnetic flux leakage from stator core 211 of stator unit 21A can be suppressed.

Further, the end member 23 may be provided at the base end portion of the claw pole motor 1 of the plurality of stator units 21. Specifically, the end member 23 may be arranged between the stator unit 21C and the fixing member 30. Thereby, magnetic flux leakage from the stator core 211 of the stator unit 21C can be suppressed.

Bearings 25 and 26 (see FIGS. 9 to 13) are fixed to the support member 24, and rotatably supports the rotating shaft member 13 via the bearings 25 and 26.

For example, the fixed member 30 has a substantially disk shape with an outer diameter larger than the rotor 10 (rotor core 11) when viewed along the axial direction.

For example, as described above, the rotor 10 is rotatably supported by the fixed member 30 via the support member 24, and the stator 20 is fixed by being held in the axial direction (FIGS. 9 to 13). reference).

In the stator 20, for example, the stator unit 21, the interphase member 22, and the end member 23 are connected to mutually adjacent components by an adhesive or the like, and are also connected to the fixing member 30 by an adhesive or the like. In this case, it may be fixed to the fixing member 30 in the axial direction.

The fixing member 30 is made of a metal having relatively high thermal conductivity, such as copper or aluminum, for example. Thereby, the thermal energy generated by the coil 212 can be conducted more efficiently to the fixing member 30. Therefore, cooling of the coil 212 can be accelerated. Further, the fixing member 30 may have, for example, a stepped shape, a fin shape, a pin shape, etc. in a region other than the region facing the stator 20 in the axial direction. Thereby, the surface area of the fixing member 30 becomes relatively large, and heat radiation to the outside air can be promoted. Therefore, it is possible to further suppress the rise in temperature of the fixing member 30 when the heat generated by the coil 212 is conducted, to ensure that the heat generated by the coil 212 is transferred to the fixing member 30, and to promote cooling of the coil 212. can.

[Stator core support structure]
Next, the support structure of the stator core 210 will be described with reference to FIGS. 9 to 15 in addition to FIGS. 1 to 8. Hereinafter, based on the states of FIGS. 9 to 13, in the axial direction, the direction in which the stator 20 is provided when seen from the fixed member 30 is "up", and the direction in which the fixed member 30 is provided when seen from the stator 20 is "up". It is sometimes conveniently called "lower".

<First example>
FIG. 9 is a longitudinal cross-sectional view in a plane including the rotation axis AX, showing an example of a support structure for the stator core 210.

Note that in this example, the end member 23 is omitted.

As shown in FIG. 9, the support member 24 has a substantially cylindrical shape (cylindrical shape) centered on the rotation axis AX.

The support member 24 passes through the stator unit 21A, the interphase member 22A, the stator unit 21B, the interphase member 22B, and the stator unit 21C in order from the top, and its lower end is fixed to the fixing member 30.

For example, the outer diameter of the outer peripheral surface of the support member 24 is set to be the same as or slightly smaller than the inner diameter of the inner peripheral surface of the stator core 210 (through hole 210D). Thereby, the outer peripheral surface of the support member 24 and the inner peripheral surface of the stator core 210 are brought into contact with each other, and the heat of the coil 212 can be conducted from the stator core 210 to the support member 24 connected to the fixing member 30. Therefore, the heat of the coil 212 can be easily radiated from the fixing member 30, and the cooling performance of the coil 212 can be improved.

The support member 24 includes a protrusion 24a.

The protruding portion 24a is provided in such a manner that it protrudes outward in the radial direction from the basic outer diameter of the support member 24 having a circular tube shape. The protruding portion 24a may be provided over the entire circumference, or may be provided in a part of the circumferential direction. Further, when provided in a part of the circumferential direction, the protrusion 24a may be provided at one location (range) in the circumferential direction, or may be provided so as to be distributed at a plurality of locations (range). .

The protrusion 24a is provided above the upper end of the support member 24, specifically, the upper end surface of the stator core 210 of the stator unit 21A in the axial direction, and abuts the corner of the upper end surface of the stator core 210 from above. come into contact with Thereby, upward movement of the stator unit 21A can be restricted.

Further, a bearing 25 is held (supported) on the inner circumferential surface of the protrusion 24a at the upper end of the support member 24.

Further, the protruding portion 24a is provided in the range where the interphase member 22A is located in the axial direction, and contacts the corner of the lower end surface of the stator unit 21A from below, and also contacts the corner of the upper end surface of the stator unit 21B. Touch the corner from above. Thereby, it is possible to restrict the downward movement of the stator unit 21A, and it is also possible to restrict the upward movement of the stator unit 21B.

The inner diameter of the inner circumferential surface of the interphase member 22A is set larger than the inner diameter of the inner circumferential surface of the stator core 210 (through hole 210D), and the radially outer tip of the protrusion 24a meets the inner circumferential surface of the interphase member 22B. comes into contact with. Thereby, movement of the interphase member 22A in the radial direction can be restricted.

Further, the protrusion 24a is provided in the range where the interphase member 22B is located in the axial direction, and contacts the corner of the lower end surface of the stator unit 21B from below, and also contacts the corner of the upper end surface of the stator unit 21C. Touch the corner from below. Thereby, it is possible to restrict the downward movement of the stator unit 21B, and it is also possible to restrict the upward movement of the stator unit 21C.

The inner diameter of the inner circumferential surface of the interphase member 22B is set larger than the inner diameter of the inner circumferential surface of the stator core 210 (through hole 210D), and the radially outer tip of the protrusion 24a meets the inner circumferential surface of the interphase member 22B. comes into contact with. Thereby, movement of the interphase member 22B in the radial direction can be restricted.

Further, the protruding portion 24a is provided in the axial direction in the lower end of the supporting member 24, specifically, in the range where the fixing member 30 is located below the lower end surface of the stator core 210 of the stator unit 21C, and Abuts on the corner of the lower end face from above. Thereby, downward movement of the stator unit 21C can be restricted.

Further, a bearing 26 is held (supported) on the inner peripheral surface of the protrusion 24a at the lower end of the support member 24.

A hole 30A is provided in a central portion of the fixed member 30 that includes the rotation axis AX.

The lower end of the support member 24 is inserted into the hole 30A of the fixing member 30 from above.

The outer diameter of the hole 30A is set to be larger than the basic outer circumferential surface of the support member 24, and the protrusion 24a contacts the inner circumferential surface of the fixing member 30 and is fitted into the hole 30A. Thereby, the lower end of the support member 24 can be fixed to the fixing member 30.

Note that, as in this example (FIG. 9), when there is no end member 23 between the stator unit 21C and the fixing member 30, the protrusion 24a on the lower side in the axial direction of the stator unit 21C is omitted. Good too. This is because the fixing member 30 can restrict the downward movement of the stator unit 21C.

In the manufacturing process, the cylindrical members are inserted into the stator unit 21A, interphase member 22A, stator unit 21B, interphase member 22B, stator unit 21C, and fixing member 30, and are protruded by any known method. The portion 24a is formed, and the support member 24 is completed. For example, a step in which a cylindrical member corresponding to the support member 24 and the stator unit 21 etc. are temporarily positioned using a predetermined fixing jig, and then the protrusion 24a is formed. is carried out, and then the fixing jig is removed.

For example, the protruding portion 24a is formed by bulge processing using hydraulic pressure or pneumatic pressure. Further, the protruding portion 24a may be formed by mechanical processing using a tube expander. Further, the protruding portion 24a may be formed by a processing method in which the stress applied in the radial direction of the support member 24 is greater than the stress applied in the axial direction. Further, the protrusion 24a may be formed by a processing method that applies stress only in the radial direction of the support member 24. In other words, the protrusion 24a may be formed by a processing method in which the stress applied in the axial direction of the support member 24 is approximately zero.

The support member 24 may be made of a material that is relatively easily deformed so that the protrusion 24a can be formed by arbitrary processing. For example, the support member 24 is made of a material having a smaller Young's modulus than the stator core 210.

In this manner, in this example, the protrusion 24a can restrict the movement of the stator core 210 of the stator unit 21 in the axial direction and support the stator units 21A to 21C. Therefore, for example, when the stator core 210 is supported in an interference fit state, a force that expands the inner peripheral surface of the stator core 210 (through hole 210D) is not applied, and the stator core 210 is damaged. can be suppressed. In addition, for example, when the stator core 210 is supported in a loose fit state, the thermal resistance between the support member 24 and the stator core 210 increases, and the cooling performance of the coil 212 is reduced. can do.

Further, in this example, in the case of a configuration in which a pair of stator cores 211 are connected at surfaces facing each other in the radial direction and circumferential direction (see FIGS. 6 and 7), the pair of stator cores 211 are connected by the upper and lower protrusions 24a of the stator core 210. The axial position of 210 can be fixed. Therefore, the pair of stator cores 211 can be connected by the protrusion 24a of the support member 24.

<Second example>
FIG. 10 is a longitudinal cross-sectional view in a plane including the rotation axis AX, showing a second example of the support structure for the stator core 210.

Hereinafter, parts that are different from the first example of the support structure for the stator core 210 described above will be mainly explained, and explanations of contents that are the same as or corresponding to the first example may be omitted.

In this example, the stator core 210 has chamfers 210E provided at the corners between both end faces in the axial direction and the inner peripheral surface.

For example, as shown in FIG. 10, the chamfer 210E is a planar chamfer (linear in a vertical cross-sectional view). Further, the chamfer 210E may be a curved chamfer (curved in the vertical cross-sectional view).

The protrusion 24a is formed to contact the surface of the chamfered corner 210E of the stator core 210. Thereby, the contact area between the protrusion 24a and the stator core 210E can be increased, and stress in the stator core 210E generated by the action between the protrusion 24a and the stator core 210E can be suppressed. Therefore, the protrusion 24a can restrict the movement of the stator core 210 in the axial direction while further suppressing damage to the stator core 210. Further, by increasing the contact area between the support member 24 and the stator core 210, the thermal resistance between the support member 24 and the stator core 210 is reduced, and the cooling performance of the coil 212 can be improved.

<3rd example>
FIG. 11 is a vertical cross-sectional view in a plane including the rotation axis AX, showing a third example of the support structure for the stator core 210.

Hereinafter, parts that are different from the first example and the second example of the support structure of the stator core 210 described above will be mainly explained, and description of contents that are the same as or corresponding to the first example and the second example may be omitted.

In this example, a cylindrical support member 27 is further provided inside the support member 24 similar to the first example described above.

The supporting member 27 has an outer diameter that is set to be the same as or slightly smaller than the basic inner circumferential surface of the supporting member 24 (the inner circumferential surface of the portion other than the protrusion 24a), and is fitted onto the inner circumferential surface of the supporting member 24. It is set up so that it can be used. Thereby, the support member 27 can suppress deformation of the support member 24 from the inside in the radial direction, and can improve the strength with which the support member 24 supports the stator 20.

The support member 27 is arranged such that both ends of the support member 27 protrude from openings at both ends of the support member 24 in the axial direction. Both end portions of the support member 27 are formed such that their outer diameters are larger than the axially intermediate portion, and hold (support) the bearings 25 and 26 on their inner peripheral portions. Thereby, the function of supporting the stator unit 21 (stator core 210) and the function of supporting the bearings 25 and 26 can be realized by distributing them to the support members 24 and 27.

For example, the lower end of the support member 27 is inserted into the hole 30A of the fixing member 30 from above and expanded in diameter by the same arbitrary method as the protrusion 24a of the support member 24. It is fitted into the inner peripheral surface of the hole 30A of the fixing member 30. Thereby, the support member 27 can be fixed to the fixing member 30. Further, the lower end of the support member 27 may be formed to have substantially the same inner diameter as the hole 30A, and may be fixed to the fixing member 30 by being press-fitted into the hole 30A. Further, a male thread is formed at the lower end of the support member 27, and in combination with a female thread formed in the hole 30A, a nut, etc. disposed on the opposite side of the fixing member 30 in the axial direction, the fixing member It may be fixed at 30.

Note that the lower end of the support member 24 is not fixed to the fixing member 30, and the support member 24 is fixed to the fixing member 30 via the support member 27.

<4th example>
FIG. 12 is a longitudinal sectional view in a plane including the rotation axis AX, showing a fourth example of the support structure for the stator core 210.

Hereinafter, parts that are different from the first to third examples of the support structure of the stator core 210 described above will be mainly explained, and explanations of contents that are the same as or corresponding to the first to third examples may be omitted.

As shown in FIG. 12, in this example, the support member 24 includes support members 24A to 24C that are divided in the axial direction.

The support member 24A supports the stator core 210 of the stator unit 21A from the inside in the radial direction.

The support member 24A is arranged so as to protrude from both ends of the stator unit 21A (through hole 210D) in the axial direction, and protrusions 24a are provided at both ends thereof.

The protruding portion 24a at the upper end of the support member 24A protrudes outward in the radial direction along the chamfered corner 211E of the upper end surface of the stator core 210 of the stator unit 21A, and extends from the upper side of the stator core 210 in the axial direction to the upper side of the stator core 210. Abuts (contacts) the corner of the end face. Thereby, upward movement of stator core 210 of stator unit 21A can be restricted.

Further, a bearing 25 is supported on the inner peripheral surface of the protrusion 24a at the upper end of the support member 24A.

The protruding portion 24a at the lower end of the support member 24A protrudes outward in the radial direction along the chamfered corner 211E of the lower end surface of the stator core 210 of the stator unit 21A, and extends from the lower side of the stator core 210 in the axial direction. Abuts (contacts) the corner of the lower end surface. Thereby, downward movement of stator core 210 of stator unit 21A can be restricted.

Further, the outer peripheral surface of the tip of the protruding portion 24a at the lower end of the support member 24A contacts the inner peripheral surface of the interphase member 22A. Thereby, movement of the interphase member 22A in the radial direction can be restricted.

Support member 24B supports stator core 210 of stator unit 21B from the inside in the radial direction.

The support member 24B is arranged so as to protrude from both ends of the stator unit 21B (through hole 210D) in the axial direction, and protrusions 24a are provided at both ends thereof.

The protruding portion 24a at the upper end of the support member 24B protrudes outward in the radial direction along the chamfered corner 211E of the upper end surface of the stator core 210 of the stator unit 21B, and extends from the upper side of the stator core 210 in the axial direction to the upper side of the stator core 210. Abuts (contacts) the corner of the end face. Thereby, upward movement of stator core 210 of stator unit 21B can be restricted.

Further, the outer circumferential surface of the tip of the protruding portion 24a at the upper end of the support member 24B comes into contact with the inner circumferential surface of the interphase member 22A. Thereby, movement of the interphase member 22A in the radial direction can be restricted.

The protruding portion 24a at the lower end of the support member 24B protrudes outward in the radial direction along the chamfered corner 211E of the lower end surface of the stator core 210 of the stator unit 21B, and extends from the lower side of the stator core 210 in the axial direction. Abuts (contacts) the corner of the lower end surface. Thereby, downward movement of stator core 210 of stator unit 21B can be restricted.

Further, the outer circumferential surface of the tip of the protruding portion 24a at the lower end of the support member 24B contacts the inner circumferential surface of the interphase member 22B. Thereby, movement of the interphase member 22B in the radial direction can be restricted.

The support member 24C supports the stator core 210 of the stator unit 21C from the inside in the radial direction.

The support member 24C is arranged so as to protrude from both ends of the stator unit 21C (through hole 210D) in the axial direction, and protrusions 24a are provided at both ends thereof.

The protruding portion 24a at the upper end of the support member 24C protrudes outward in the radial direction along the chamfered corner 211E of the upper end surface of the stator core 210 of the stator unit 21C, and extends from the upper side of the stator core 210 in the axial direction to the upper side of the stator core 210. Abuts (contacts) the corner of the end face. Thereby, upward movement of the stator core 210 of the stator unit 21C can be restricted.

Further, the outer circumferential surface of the tip of the protruding portion 24a at the upper end of the support member 24C contacts the inner circumferential surface of the interphase member 22B. Thereby, movement of the interphase member 22A in the radial direction can be restricted.

The protruding portion 24a at the lower end of the support member 24C protrudes outward in the radial direction along the chamfered corner 211E of the lower end surface of the stator core 210 of the stator unit 21C, and extends from the lower side of the stator core 210 in the axial direction. Abuts (contacts) the corner of the lower end surface. Thereby, downward movement of the stator core 210 of the stator unit 21C can be restricted.

The lower end of the support member 24C is inserted from above the hole 30A of the fixing member 30.

The outer diameter of the hole 30A is set to be larger than the basic outer peripheral surface of the support member 24C, and the protrusion 24a contacts the inner peripheral surface of the fixing member 30 and is fitted into the hole 30A. Thereby, the lower end of the support member 24C can be fixed to the fixing member 30.

In this way, the support member 24 can support the stator core 210 of the symmetrical stator unit 21 for each divided support member 24A to 24C in a manner that restricts the axial position of the stator core 210.

<Fifth example>
FIG. 13 is a longitudinal cross-sectional view in a plane including the rotation axis AX, showing an example of a support structure for the stator core 210.

Hereinafter, parts that are different from the first to fourth examples of the support structure of the stator core 210 described above will be mainly explained, and explanations of contents that are the same as or corresponding to the first to fourth examples may be omitted.

As shown in FIG. 13, in this example, a recess 210F extending in the circumferential direction is provided in the yoke portion 210C of the stator core 210.

The recessed portion 210F may be provided over the entire circumference in the circumferential direction, or may be provided in a part of the circumferential direction. Moreover, when provided in a part of the circumferential direction, the recessed portion 210F may be provided at one location (range) in the circumferential direction, or may be provided so as to be distributed at a plurality of locations (range).

The protrusion 24a is provided at a position in the axial direction where the recess 210F of the stator core 210 exists. The protrusion 24a enters into the recess 210F and engages with the upper and lower side surfaces of the recess 210F in abutting manner. Thereby, movement of stator core 210 in the axial direction can be restricted.

In addition, in the case of a configuration in which the pair of stator cores 211 are connected at surfaces facing each other in the radial direction and the circumferential direction (see FIGS. 6 and 7), the recess 210F is formed so as to straddle the yoke portions 211C of both of the pair of stator cores 211. It may be provided so as to extend in the circumferential direction. As a result, the axial positions of the pair of stator cores 211 can be fixed by the protrusion 24a that engages with the recess 210F, and the connection (fixation) of both can be realized.

<6th example>
FIG. 14 is a perspective view showing a sixth example of a support structure for stator core 210. FIG. 15 is a cross-sectional view in a plane perpendicular to the rotation axis AX, showing a sixth example of the support structure for the stator core 210.

As shown in FIGS. 14 and 15, in this example, the stator core 210 is provided with a recess 210G extending in the axial direction on the inner peripheral surface of the through hole 210D.

For example, as shown in FIG. 14, the recess 210G may be provided over the entirety of the through hole 210D in the axial direction, or may be provided in a part of the through hole 210D in the axial direction.

In this example, the support member 24 is provided with a protrusion 24b that protrudes outward in the radial direction.

The protrusion 24b is provided at a circumferential and axial position where the recess 210G is provided, enters the recess 210G, and engages with the side surface of the recess 210G in the circumferential direction. Thereby, the protruding portion 24b can restrict movement of the stator core 210 in the circumferential direction.

For example, as shown in FIGS. 14 and 15, the recess 210G has a shape that extends outward in the radial direction with a side surface perpendicular to the inner peripheral surface of the through hole 210D.

Further, the recessed portion 210G may have a shape that is recessed toward the outside in the radial direction with side surfaces formed at an obtuse angle with respect to the inner circumferential surface. In this case, the side surface of the recessed portion 210G may be a plane whose angle with respect to the inner circumferential surface is constant toward the outside in the radial direction, or may be a curved surface whose angle changes toward the outside in the radial direction. Thereby, the protrusion 24b and the side surface of the recess 210G can be smoothly brought into contact with each other, and the contact area between them can be increased. Therefore, it is possible to suppress the stress in stator core 210E caused by the action between protrusion 24b and stator core 210E, further suppress damage to stator core 210, and restrict movement of stator core 210 in the circumferential direction. Further, by increasing the contact area between the support member 24 and the stator core 210, the thermal resistance between the support member 24 and the stator core 210 is reduced, and the cooling performance of the coil 212 can be improved.

Further, in the case of a configuration in which the pair of stator cores 211 are connected at axially opposing surfaces (see FIGS. 4 and 5), the recess 210G extends axially across the yoke portions 211C of both of the pair of stator cores 211. It may be provided so as to extend. Thereby, the positions of the pair of stator cores 211 in the circumferential direction can be fixed by the protrusion 24b that engages with the recess 210G, and the connection (fixation) of both can be realized.

In this manner, in this example, the support member 24 can support the stator core 210 in such a manner that movement of the stator core 210 in the circumferential direction is restricted by the protrusion 24b.

[Other embodiments]
Next, other embodiments will be described.

The embodiments described above may be combined, modified, or modified as appropriate.

For example, in the claw pole motor 1, the support structure for the stator core 210 in any of the first to fifth examples described above and the support structure for the stator core 210 in the sixth example described above may be combined.

Furthermore, in the support structure for the stator core 210 of the fifth example described above, the recess 210F may be formed to extend in a direction having both circumferential and axial components. For example, the recess 210F is formed as a spiral groove. Thereby, the movement of the stator core 210 in the axial direction and the circumferential direction can be restricted by the protrusion 24a that engages with the recess 210F.

Furthermore, the support structure for the stator core 210 described above may be applied to a support structure for a single-phase claw pole motor.

Further, the support structure for the stator core 210 described above may be adopted as a support structure for a claw pole type iron core (rotor core) of a rotor in an inner rotor type rotating electric machine.

Further, the support structure for the stator core 210 described above may be adopted as a structure that supports any type of iron core different from the claw pole type iron core from the inside in the radial direction.

[Application example of claw pole motor]
Next, a specific application example of the claw pole motor 1 according to this embodiment will be described with reference to FIGS. 16 and 17.

<First application example>
FIG. 16 is a diagram showing an example of an air conditioner 100 equipped with the claw pole motor 1 according to the present embodiment.

Air conditioner 100 (an example of a refrigeration device) includes an outdoor unit 110, an indoor unit 120, and refrigerant paths 130 and 140. The air conditioner 100 operates a refrigerant circuit including an outdoor unit 110, an indoor unit 120, refrigerant paths 130, 140, etc., and adjusts the temperature, humidity, etc. of the room in which the indoor unit 120 is installed.

The outdoor unit 110 is placed outdoors of a building whose temperature and the like are to be adjusted. Outdoor unit 110 is connected to one end of each of refrigerant paths 130 and 140, sucks refrigerant from one of refrigerant paths 130 and 140, and discharges refrigerant to the other.

The indoor unit 120 is placed indoors in a building whose temperature and the like are to be adjusted. The indoor unit 120 is connected to the other end of each of the refrigerant paths 130 and 140, takes in refrigerant from either one of the refrigerant paths 130 and 140, and discharges the refrigerant to the other.

The refrigerant paths 130 and 140 are configured by, for example, pipes, and connect the outdoor unit 110 and the indoor unit 120 so that the refrigerant can circulate between the outdoor unit 110 and the indoor unit 120.

Outdoor unit 110 includes refrigerant paths L1 to L6, a four-way switching valve 111, a compressor 112, an outdoor heat exchanger 113, an outdoor expansion valve 114, and a fan 115.

The refrigerant paths L1 to L6 are configured, for example, as pipes.

The refrigerant path L1 connects one end of the refrigerant path 130 outside the outdoor unit 110 and the four-way switching valve 111.

The refrigerant path L2 connects between the four-way switching valve 111 and the inlet of the compressor 112.

Refrigerant path L3 connects between four-way switching valve 111 and the outlet of compressor 112.

Refrigerant path L4 connects between four-way switching valve 111 and outdoor heat exchanger 113.

Refrigerant path L5 connects between outdoor heat exchanger 113 and outdoor expansion valve 114.

The refrigerant path L6 connects between one end of the refrigerant path 140 outside the outdoor unit 110 and the outdoor expansion valve 114.

The four-way switching valve 111 reverses the flow of refrigerant circulation between the cooling operation and the heating operation of the air conditioner 100.

During cooling operation of the air conditioner 100, the four-way switching valve 111 connects the solid line path in FIG. Specifically, during cooling operation of the air conditioner 100, the four-way switching valve 111 connects the refrigerant path L1 and the refrigerant path L2, and the refrigerant path L3 and the refrigerant path L4.

On the other hand, in the case of heating operation of the air conditioner 100, the four-way switching valve 111 connects the dotted line path in FIG. Specifically, during heating operation of the air conditioner 100, the four-way switching valve 111 connects the refrigerant path L4 and the refrigerant path L2, and the refrigerant path L1 and the refrigerant path L3.

The compressor 112 sucks refrigerant from the refrigerant path L2, compresses it to high pressure, and discharges it to the refrigerant path L3. The compressor 112 is equipped with (built-in) the claw pole motor 1 and is driven by the claw pole motor 1.

During cooling operation of the air conditioner 100, the high temperature and high pressure refrigerant compressed by the compressor 112 flows into the outdoor heat exchanger 113 through the refrigerant path L3 and the refrigerant path L4.

On the other hand, during heating operation of the air conditioner 100, the high temperature and high pressure refrigerant compressed by the compressor 112 flows out to the refrigerant path 130 outside the outdoor unit 110 through the refrigerant path L3 and the refrigerant path L1. The high temperature and high pressure refrigerant then flows into the indoor unit 120 through the refrigerant path 130.

The outdoor heat exchanger 113 exchanges heat between the outside air and the refrigerant passing therethrough. Specifically, the outdoor heat exchanger 113 is provided with a fan 115, and the outdoor heat exchanger 113 exchanges heat between the outside air blown by the fan 115 and the refrigerant flowing inside.

During cooling operation of the air conditioner 100, the outdoor heat exchanger 113 causes the high-temperature, high-pressure refrigerant flowing from the refrigerant path L4 and compressed by the compressor 112 to radiate heat to the outside air, and converts the condensed and liquefied refrigerant ( liquid refrigerant) to flow out into the refrigerant path L5.

Furthermore, during heating operation of the air conditioner 100, the outdoor heat exchanger 113 causes the low temperature, low pressure liquid refrigerant flowing in from the refrigerant path L5 to absorb heat from the outside air, and causes the evaporated refrigerant to flow out to the refrigerant path L4.

The outdoor expansion valve 114 is closed to a predetermined opening degree during heating operation of the air conditioner 100, and reduces the pressure of the refrigerant (liquid refrigerant) flowing from the refrigerant path L6 to a predetermined pressure. On the other hand, the outdoor expansion valve 114 is fully opened during cooling operation of the air conditioner 100, and allows the refrigerant (liquid refrigerant) to pass from the refrigerant path L5 to the refrigerant path L6.

As described above, the fan 115 (an example of an air blower) blows air to the outdoor heat exchanger 113 to promote heat exchange in the outdoor heat exchanger 113. The fan 115 is equipped with, for example, an impeller (also referred to as an "impeller") 115A and a claw pole motor 1, and is operated by the impeller 115A being driven by the claw pole motor 1.

Indoor unit 120 includes an indoor expansion valve 121, an indoor heat exchanger 122, and a fan 123.

The indoor expansion valve 121 is closed to a predetermined opening degree during cooling operation of the air conditioner 100, and reduces the pressure of the supercooled liquid refrigerant flowing from the refrigerant path 140 to a predetermined pressure. On the other hand, the indoor expansion valve 121 is fully opened during heating operation of the air conditioner 100 and allows the refrigerant (liquid refrigerant) flowing out from the indoor heat exchanger 122 to pass toward the refrigerant path 140 .

The indoor heat exchanger 122 exchanges heat between indoor air and a refrigerant passing through the interior. Specifically, by the action of the fan 123 installed in the indoor unit 120, indoor air is passed around the indoor heat exchanger 122, and heat exchange is performed with the refrigerant inside the indoor heat exchanger 122. By blowing out the indoor air outside the indoor unit 120, indoor cooling or heating is achieved.

Specifically, during cooling operation of the air conditioner 100, the indoor heat exchanger 122 causes the low temperature, low pressure liquid refrigerant whose pressure has been reduced by the indoor expansion valve 121 to absorb heat from the indoor air, thereby lowering the temperature of the indoor air.

On the other hand, during heating operation of the air conditioner 100, the indoor heat exchanger 122 causes the high-temperature, high-pressure refrigerant flowing from the outdoor unit 110 through the refrigerant path 130 to radiate heat to the indoor air, thereby raising the temperature of the indoor air.

As described above, the fan 123 (an example of a blower) blows air to the indoor heat exchanger 122 and transfers the indoor air that has undergone heat exchange with the refrigerant inside the indoor heat exchanger 122 to the outside of the indoor unit 120. to blow out. The fan 123 is equipped with, for example, an impeller (also referred to as an "impeller") 123A and a claw pole motor 1, and operates when the impeller 123A is driven by the claw pole motor 1.

Note that the claw pole motor 1 may be mounted on some of the compressor 112, the fan 115, and the fan 123, that is, any one or two of them.

In this way, the claw pole motor 1 according to the present embodiment can be applied to the compressor 112, fan 115, and fan 123 installed in the air conditioner 100.

Note that the claw pole motor 1 may be applied to refrigeration devices other than the air conditioner 100.

<Second application example>
FIG. 25 is a diagram showing an example of the vehicle 150.

Vehicle 150 is an electric vehicle and includes claw pole motor 1 , drive wheels 160 , battery 170 , power converter 180 , and power transmission mechanism 190 .

For example, vehicle 150 is a BEV (Battery Electric Vehicle). Further, the vehicle 150 may be a HEV (Hybrid Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), or a range extender EV.

Claw pole motor 1 is the prime mover of vehicle 150. Claw pole motor 1 drives drive wheels 160 via power transmission mechanism 190 to cause vehicle 150 to travel.

The drive wheels 160 are driven by the power transmitted via the power transmission mechanism 190, as described above. The drive wheel 160 may be a front wheel, a rear wheel, or both.

The battery 170 has an output voltage of several hundred volts, for example, and supplies electrical energy to the claw pole motor 1 via the power converter 180. Battery 170 is, for example, a lithium ion battery.

Note that a DC (Direct Current)-DC converter that boosts or steps down the output voltage of the battery 170 may be provided between the battery 170 and the power conversion device 180.

The power converter 180 converts the DC voltage of the battery 170 into a three-phase AC voltage and supplies it to the claw pole motor 1 . Furthermore, the power conversion device 180 converts the regenerated energy of the three-phase AC voltage of the claw pole motor 1 during deceleration of the vehicle 150 into DC voltage, and charges the battery 170 with the regenerated energy.

Power transmission mechanism 190 transmits the output of claw pole motor 1 to drive wheels 160. Power transmission mechanism 190 includes a reduction gear 191, a differential 192, and a drive shaft 193.

Note that, for example, the claw pole motor 1 may be provided for each of the left and right drive wheels 160, such as in the form of an in-wheel motor. In this case, the power transmission mechanism 190 may be provided for each of the left and right drive wheels 160, the differential 192 may be omitted, and the drive shaft 193 may be omitted.

The reducer 191 is connected to one end of the output shaft of the claw pole motor 1, and outputs the reduced power of the output shaft of the claw pole motor 1 by reducing the speed at a predetermined reduction ratio.

Note that the speed reducer 191 may be omitted.

The differential 192 transmits the output of the speed reducer 191 to the left and right drive wheels 160 through the left and right drive shafts 193, and absorbs the speed difference between the left and right drive wheels 160 when turning.

The drive shaft 193 connects the differential 192 and each of the left and right drive wheels 160, and transmits the power output from the differential 192 to the left and right drive wheels 160.

Note that the claw pole motor 1 may be mounted on the vehicle 150 for purposes other than as a prime mover of the vehicle 150. For example, the claw pole motor 1 is mounted on a compressor of an air conditioner (air conditioner) of a vehicle 150.

In this way, the claw pole motor 1 according to this embodiment can be applied to the vehicle 150.

[Effect]
Next, the operation of the rotating electrical machine according to this embodiment will be explained.

In this embodiment, the rotating electrical machine includes an iron core, a tubular first member, and a first regulating section. The rotating electric machine, the iron core, and the first member are, for example, the claw pole motor 1, the stator core 210 or the stator core 211, and the protrusion 24a, respectively. Specifically, the iron core has an inner circumferential surface that extends in the axial direction around the rotation axis. Further, the first member extends in the axial direction along the inner circumferential surface of the iron core. The first restricting portion is provided in a portion of the first member in the axial direction, protrudes outward in the radial direction, and restricts movement of the iron core in the axial direction by coming into contact with the iron core in the axial direction.

Thereby, while the core is supported by the protrusion 24a, the first member other than the protrusion 24a can be brought into contact along the inner circumferential surface of the core. Therefore, it is possible to suppress a situation where play in the position of the core in the axial direction occurs, for example, when the core is supported in a loose fit state. In addition, for example, when the core is supported in an interference fit state, strong frictional force or force that pushes the inner diameter of the core acts on the inner circumferential surface of the core, resulting in damage to the core. Can be suppressed. Therefore, the iron core of the rotating electric machine can be supported more appropriately.

Further, in this embodiment, the rotating electric machine may include a stator including an iron core, and a rotor rotatably disposed outside the stator in the radial direction.

Thereby, the core of the stator of the outer rotor type rotating electric machine can be more appropriately supported.

Further, in this embodiment, the iron core may be formed of a powder magnetic core.

As a result, even if the core is made of a powder magnetic core with relatively low strength against tensile stress, it is possible to avoid an interference fit state that would generate tensile stress, and prevent the core from breaking. The situation can be brought under control.

Further, in the present embodiment, the first regulating portion may be provided so as to abut both axial end portions of the iron core from the outside in the axial direction.

Thereby, the iron core can be supported by the first restricting portion in a manner that restricts movement of the iron core outward in the axial direction.

Further, in the present embodiment, the rotating electric machine includes a stator including a winding wound in an annular shape and a claw-pole iron core provided so as to surround the winding, and a radial direction of the stator. and a rotor disposed outside of the rotor. The rotating electrical machine, the windings, the iron core, the stator, and the rotor are, for example, the claw pole motor 1, the coil 212, the stator core 210, the stator 20, and the rotor 10, respectively.

Thereby, the iron core of the stator of the outer rotor type claw pole motor can be more appropriately supported.

Further, in this embodiment, the stator may include a first stator unit, a second stator unit, and an interphase member. Specifically, the first stator unit may include the above-described winding and the above-described iron core. Similarly, the second stator unit may include the windings described above and the core described above, and may be stacked axially with respect to the first stator unit. Further, the interphase member is disposed adjacent to the first stator unit and the second stator unit in the axial direction, and has an inner circumferential surface that is larger in radial dimension than the inner circumferential surface of the iron core. You may do so. The first stator unit, the second stator unit, and the interphase member are, for example, the stator unit 21A, the stator unit 21B, and the interphase member 22A, respectively. The first regulating portion may regulate movement of the interphase member in the radial direction by contacting the inner circumferential surface of the interphase member.

Thereby, the first regulating portion can support the interphase member by regulating the radial movement of the interphase member in addition to the axial movement of the iron core.

Further, in this embodiment, the corner between the axial end face and the inner peripheral surface of the core may be chamfered (for example, chamfered 211E).

Thereby, the first regulating part and the corner of the core can be brought into smooth contact, and damage to the core due to the action from the first regulating part to the corner of the core can be suppressed. Moreover, the contact area between the first regulating portion and the corner portion of the iron core can be increased, and the cooling performance of the winding can be improved.

In the present embodiment, the rotating electric machine may include a first recess that is provided on the inner circumferential surface of the iron core and that engages and abuts the first restriction part in the axial direction. The first recess is, for example, recess 210F.

Thereby, the first regulating portion engages with the recess 210F, thereby regulating the movement of the iron core in the axial direction.

Further, in the present embodiment, the side surface of the first recess may be formed to form an obtuse angle with respect to the inner circumferential surface of the iron core.

Thereby, the first restriction part and the first recess are brought into smooth contact, and damage to the core due to the action from the first restriction part to the corner of the core can be suppressed. Moreover, the contact area between the first regulating portion and the corner portion of the iron core can be increased, and the cooling performance of the winding can be improved.

Further, in this embodiment, the rotating electrical machine may include a tubular second member that is provided inside the first member in the radial direction and holds the bearing of the rotating shaft. The rotating shaft, the bearing, and the second member are, for example, the rotating shaft member 13, the bearings 25, 26, and the support member 27, respectively.

This allows the first member and the second member to share support for the core and support for the bearing.

Further, in the present embodiment, the rotating electric machine includes a second recess provided in the inner circumferential surface of the iron core, a second recess provided in the first member, protruding outward in the radial direction, engaging with the second recess in the circumferential direction. A second regulating part may be provided that regulates the movement of the iron core in the circumferential direction by coming into contact with the second regulating part.

As a result, the second restricting portion engages with the second recess, so that the core can be supported in a manner that restricts movement of the core in the circumferential direction.

In this embodiment, the first restricting portion may be formed by expanding the first member after inserting the first member in the radial direction of the core.

Thereby, it is possible to manufacture a rotating electric machine in which the movement of the iron core in the axial direction can be restricted by the first restriction part.

Although the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims.

1 Claw pole motor 10 Rotor 11 Rotor core 12 Permanent magnet 13 Rotating shaft member 14 Connection member 20 Stator 21, 21A to 21C Stator unit 22, 22A, 22B Interphase member 23 End member 24, 24A to 24C Support member 24a Projection part 24b Projection 25 Bearing 26 Bearing 27 Supporting member 30 Fixing member 30A Hole 100 Air conditioner 110 Outdoor unit 111 Four-way switching valve 112 Compressor 113 Outdoor heat exchanger 114 Outdoor expansion valve 115 Fan 115A Impeller 120 Indoor unit 121 Indoor expansion Valve 122 Indoor heat exchanger 123 Fan 123A Impeller 130 Refrigerant path 140 Refrigerant path 150 Vehicle 160 Drive wheel 170 Battery 180 Power converter 190 Power transmission mechanism 191 Reducer 192 Differential 193 Drive shaft 210 Stator core 210C Yoke portion 210D Through hole 210E Stator core 210F Recess 210G Recess 211 Stator core 211A Yoke 211A1 Yoke 211A2 Yoke 211B Claw magnetic pole 211B1 Claw magnetic pole 211B2 Claw magnetic pole 211C Yoke 211D Hole 212 Coil AX Rotation axis L1 to L6 Refrigerant path

Claims (16)

an iron core having an inner circumferential surface extending in the axial direction around the rotation axis;
a tubular first member extending in the axial direction along the inner circumferential surface of the iron core;
a first regulating portion provided in a part of the first member in the axial direction, protruding outward in the radial direction, and regulating movement of the iron core in the axial direction by coming into contact with the iron core in the axial direction; prepare,
Rotating electric machine. a stator including the iron core;
a rotor rotatably disposed outside the stator in the radial direction;
The rotating electric machine according to claim 1. The iron core is formed of a powder magnetic core.
The rotating electric machine according to claim 1 or 2. The first regulating portion is provided so as to abut both axial ends of the iron core from the outside in the axial direction.
The rotating electric machine according to any one of claims 1 to 3. a stator including a winding wound in an annular shape and a claw-pole iron core provided so as to surround the winding;
a rotor disposed radially outside the stator;
The rotating electric machine according to any one of claims 1 to 4. The stator is
a first stator unit including the winding and the iron core;
a second stator unit that includes the winding and the iron core and is stacked in the axial direction with respect to the first stator unit;
an interphase member disposed adjacently between the first stator unit and the second stator unit in the axial direction, and having an inner circumferential surface larger in radial dimension than the inner circumferential surface of the iron core; and,
The first regulating portion regulates movement of the interphase member in the radial direction by contacting an inner circumferential surface of the interphase member.
The rotating electric machine according to claim 5. The corner between the axial end surface and the inner peripheral surface of the iron core is chamfered,
The rotating electric machine according to any one of claims 1 to 6. a first recess provided on the inner circumferential surface of the iron core that engages and abuts the first restriction portion in the axial direction;
The rotating electric machine according to any one of claims 1 to 7. The side surface of the first recess is formed such that the angle with respect to the inner circumferential surface of the iron core is an obtuse angle.
The rotating electric machine according to claim 8. a tubular second member provided inside the first member in the radial direction and holding a bearing of the rotating shaft;
The rotating electric machine according to any one of claims 1 to 9. a second recess provided in the inner peripheral surface of the iron core;
a second regulating part provided on the first member, protruding outward in the radial direction, engaging with the second recess and abutting in the circumferential direction, thereby regulating movement of the iron core in the circumferential direction;
The rotating electric machine according to any one of claims 1 to 10. forming the first regulating portion by expanding the first member after inserting the first member axially inside the core in the radial direction;
The method for manufacturing a rotating electric machine according to any one of claims 1 to 11. The rotating electrical machine according to any one of claims 1 to 11 is provided.
Blower. The rotating electrical machine according to any one of claims 1 to 11 is provided.
compressor. The rotating electrical machine according to any one of claims 1 to 11 is provided.
Refrigeration equipment. The rotating electrical machine according to any one of claims 1 to 11 is provided.
vehicle.

Images