WO2022210366A1

WO2022210366A1 - Motor, blower device, compressor device, and refrigeration device

Info

Publication number: WO2022210366A1
Application number: PCT/JP2022/014444
Authority: WO
Inventors: 茜上田; 尚宏木戸; 能成浅野; 寛日比野
Original assignee: ダイキン工業株式会社
Priority date: 2021-03-30
Filing date: 2022-03-25
Publication date: 2022-10-06
Also published as: TW202245386A; JP2022154194A

Abstract

A motor 1 according to an embodiment of the present disclosure comprises: a rotor 10 configured to rotate freely about the axis of rotation; and a stator 20 including a claw-pole stator unit 21 that includes a winding 212 that is circumferentially wound around the axis of rotation and a stator core 211 provided so as to surround the winding 212, wherein heatsink fins 40 are provided on an outermost end of the stator unit 21 in the axial direction of the axis of rotation.

Description

Motors, Blowers, Compressors, and Refrigerators

The present disclosure relates to motors, blowers, compressors, and refrigerators.

For example, a claw pole type motor having fins on the outer peripheral surface of the stator is known (see Patent Document 1).

Japanese Patent No. 4041443

However, in an outer rotor type claw pole motor, if heat radiation fins are provided on the outer peripheral surface of the stator unit, the gap between the outer peripheral surface of the stator unit and the permanent magnets will increase, and the motor performance will deteriorate. In addition to this, the outer diameter of the motor increases.

In the case of an inner rotor type claw pole type motor, if heat radiation fins are provided on the outer peripheral surface of the stator unit, the fins are provided between the motor case and the stator unit. Fastening with the stator unit becomes difficult. In addition, the outer diameter of the motor also increases.

An object of the present disclosure is to provide a technology capable of improving the heat dissipation effect of a stator unit in a claw pole motor.

In one embodiment of the present disclosure,
a rotor configured to be rotatable around a rotation axis;
a stator having a claw pole type stator unit including a winding wound annularly around the rotation axis and an iron core provided to surround the winding,
A motor is provided which has heat radiating fins at the outermost end of the stator unit in the axial direction of the rotation axis.

According to this embodiment, the heat dissipation effect of the stator unit can be improved without increasing the outer diameter of the motor.

Also, in the above-described embodiment,
A fixing member that supports the stator,
The heat radiation fins are
It may be provided at the end of the stator unit farthest from the fixing member.

Also, in the above-described embodiment,
The radiation fins may restrict movement of the stator in the axial direction of the rotating shaft by contacting the stator unit.

Also, in the above-described embodiment,
The stator may have two or more stator units stacked in the axial direction of the rotating shaft.

Also, in the above-described embodiment,
The space in which the stator is arranged may have a flow path through which a fluid can be introduced from the outside of the space.

Also, in the above-described embodiment,
The rotor is
It may be configured to rotate outside the stator.

Also, in the above-described embodiment,
A fan may be provided attached to the outer surface of the rotor.

Also, in the above-described embodiment,
A second heat radiation fin may be provided on the inner surface of the rotor facing the heat radiation fin.

Also, in the above-described embodiment,
The heat radiation fins are
It may be formed in the iron core of the stator unit.

Also, in the above-described embodiment,
The heat radiation fins are
It may be a part separate from the iron core of the stator unit.

Also, in the above-described embodiment,
A second fan may be provided in the space where the stator is arranged and rotate together with the rotor.

Also, in the above-described embodiment,
The heat radiation fins are
It may have a plurality of plate-like members or a plurality of pin-like members arranged concentrically.

Also, in the above-described embodiment,
The heat radiation fins are
It may have a plurality of plate-shaped members or a plurality of pin-shaped members arranged radially.

It is a perspective view showing an outline of a motor concerning this embodiment. It is a perspective view showing an example of composition of a stator concerning this embodiment. It is an exploded view showing an example of composition of a stator unit concerning this embodiment. It is a longitudinal section showing an example of composition of a motor concerning this embodiment. 1 is a perspective view of a motor according to a first embodiment; FIG. 1 is a top view of a motor according to a first embodiment; FIG. 1 is a vertical cross-sectional view showing an example of a configuration of a motor according to a first embodiment; FIG. FIG. 7 is a longitudinal sectional view showing an example of the configuration of a motor according to a second embodiment; FIG. 11 is a vertical cross-sectional view showing an example of the configuration of a motor according to a third embodiment; FIG. 11 is a vertical cross-sectional view showing a modified example of the configuration of the motor 1 according to the third embodiment; FIG. 11 is a vertical cross-sectional view showing an example of the configuration of a motor according to a fourth embodiment; FIG. 11 is a vertical cross-sectional view showing an example of the configuration of a motor according to a fifth embodiment; It is a figure which shows the example of application to the air blower of the motor which concerns on this embodiment. It is a figure which shows an example of the shape and arrangement|positioning of the heat radiating fin with which the motor which concerns on this embodiment is provided. FIG. 10 is a vertical cross-sectional view showing an example of the configuration of a motor according to another embodiment;

Embodiments will be described below with reference to the drawings.

[Basic Configuration of Motor 1]
First, the basic configuration of a motor 1 according to this embodiment will be described with reference to FIGS. 1 to 4. FIG.

FIG. 1 is a perspective view showing an overview of the motor 1 according to this embodiment. In FIG. 1, illustration of the connecting member 14 provided in the rotor 10 is omitted. FIG. 2 is a perspective view showing an example of the configuration of the stator 20 according to this embodiment. In FIG. 2, illustration of the rotor 10 (rotor core 11, permanent magnet 12, rotating shaft member 13, and connecting member 14) is omitted. FIG. 3 is an exploded view showing an example of the configuration of the stator unit 21 according to this embodiment. FIG. 4 is a longitudinal sectional view showing an example of the configuration of the motor 1 according to this embodiment.

The motor 1 shown in FIGS. 1 to 4 is a so-called outer rotor type claw pole motor. The motor 1 is driven by a multi-phase (three-phase in this example) armature current. A motor 1 is used for a blower, a refrigerator, and the like.

As shown in FIGS. 1 to 4, the motor 1 includes a rotor 10, a stator 20 and a fixed member 30.

As shown in FIGS. 1 to 4, the rotor 10 is arranged outside the stator 20 in the radial direction of the motor 1 (hereinafter simply referred to as "radial direction"), and is rotatable around the rotation axis AX. configured to The rotor 10 has a rotor core 11 , a plurality of (20 in this example) permanent magnets 12 , and a rotating shaft member 13 . Note that the rotor 10 may also be called a "rotor".

The rotor core 11 has, for example, a substantially cylindrical shape, and is arranged so that the rotation axis AX of the motor 1 and the axis of the cylindrical shape substantially coincide. Further, the rotor core 11 has substantially the same length as the stator 20 in the axial direction of the motor 1 (hereinafter simply referred to as "axial direction"). The rotor core 11 is made of, for example, steel plate, cast iron, dust core, or the like. In the example shown in FIG. 1, the rotor core 11 is composed of a plurality (three in this example) of rotor cores 11A to 11C laminated in the axial direction. However, the rotor core 11 may be configured by one member in the axial direction. Note that the rotor core 11 is sometimes called a "rotor core".

A plurality of permanent magnets 12 (20 magnets in this example) are arranged at equal intervals in the circumferential direction on the inner peripheral surface of the rotor core 11 . Moreover, the plurality of permanent magnets 12 are formed so as to exist between substantially one end and substantially the other end in the axial direction of the rotor core 11 . Permanent magnets 12 are, for example, neodymium sintered magnets or ferrite magnets.

Each of the plurality of permanent magnets 12 is magnetized with different magnetic poles at both ends in the radial direction. Two permanent magnets 12 adjacent in the circumferential direction among the plurality of permanent magnets 12 are magnetized with different magnetic poles on the inner side in the radial direction facing the stator 20 . Therefore, on the radially outer side of the stator 20, in the circumferential direction, the permanent magnets 12 magnetized with N poles radially inward and the permanent magnets 12 magnetized with S poles radially inwardly are arranged. are arranged alternately.

Each of the plurality of permanent magnets 12 may be composed of one magnet member in the axial direction, or a plurality of magnet members divided in the axial direction (for example, the number corresponding to the number of laminated rotor core 11 members). 3) magnet members. In this case, the plurality of magnet members constituting the axially divided permanent magnets 12 are all magnetized with the same magnetic poles on the inner side in the radial direction facing the stator 20 .

The plurality of permanent magnets 12 arranged in the circumferential direction are composed of a single member in the circumferential direction, such as an annular ring magnet or a plastic magnet in which magnetic poles different in the circumferential direction are alternately magnetized. Permanent magnets may be substituted. In this case, the permanent magnet, which is composed of one member in the circumferential direction, may also be composed of one member in the axial direction, and may be composed of one member as a whole. Also, the permanent magnet formed of one member in the circumferential direction may be divided into a plurality of members in the axial direction, as in the case of the plurality of permanent magnets 12 . Moreover, in the circumferential direction, when a plastic magnet composed of one member is employed, the rotor core 11 may be omitted.

The rotating shaft member 13 has, for example, a substantially cylindrical shape, and is arranged so that the rotating shaft center AX of the motor 1 and the shaft center of the cylindrical shape substantially coincide. The rotary shaft member 13 is rotatably supported by, for example, bearings 25 and 26 (see FIG. 4) provided at both ends of the insertion member 24 in the axial direction. The insertion member 24 is fixed to the fixing member 30 . Thereby, the rotating shaft member 13 can rotate about the rotation axis AX with respect to the fixed member 30 . For example, the rotating shaft member 13 has a connecting member 14 (Fig. 4 ) is connected to the rotor core 11 .

The connecting member 14 has, for example, a substantially disc shape that closes the substantially cylindrical open end of the rotor core 11 . As a result, the rotor core 11 and the plurality of permanent magnets 12 fixed to the inner peripheral surface of the rotor core 11 move along the rotation axis AX of the motor 1 with respect to the fixed member 30 in accordance with the rotation of the rotary shaft member 13 . can rotate around.

As shown in FIGS. 1 to 4, the stator 20 is arranged radially inside the rotor core 11 and the permanent magnets 12 of the rotor 10 . The stator 20 has a plurality (three in this example) of claw pole type stator units 21 , a plurality (two in this example) of interphase members 22 , end members 23 and insertion members 24 . Note that the stator 20 is sometimes called a "stator".

As shown in FIG. 3 , the stator unit 21 has a pair of stator cores 211 and windings 212 .

A pair of stator cores 211 are provided so as to surround the windings 212 . The stator core 211 is made of, for example, a dust core. Stator core 211 has yoke portion 211A, a plurality of claw poles 211B, yoke portion 211C, and insertion hole 211D. Note that the pair of stator cores 211 may also be called a "stator core".

The yoke portion 211A has an annular shape when viewed in the axial direction and has a predetermined thickness in the axial direction.

The plurality of claw magnetic poles 211B are arranged at equal intervals in the circumferential direction on the outer peripheral surface of the yoke portion 211A, and each project radially outward from the outer peripheral surface of the yoke portion 211A. The claw magnetic pole 211B has a claw magnetic pole portion 211B1 and a claw magnetic pole portion 211B2.

The claw magnetic pole portion 211B1 has a predetermined width and protrudes from the outer peripheral surface of the yoke portion 211A by a predetermined length.

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 FIG. 3, 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, the claw magnetic pole portion 211B2 may have a tapered shape in which the width becomes narrower as the distance from the claw magnetic pole portion 211B1 increases in the axial direction. Since the motor 1 has the claw magnetic pole portion 211B2, it is possible to secure a relatively large facing area between the magnetic pole surface of the claw magnetic pole 211B magnetized by the armature current of the winding 212 and the rotor . Therefore, since the motor 1 can relatively increase the torque of the motor 1, the output of the motor 1 can be improved. Note that the claw magnetic pole portion 211B2 may be omitted.

The yoke portion 211C is configured such that a portion near the inner peripheral surface of the yoke portion 211A protrudes toward the other of the pair of stator cores 211 by a predetermined amount. It has a small toric shape. As a result, the pair of stator cores 211 are in contact with each other at the yoke portions 211C, and a space for accommodating the winding 212 is created between the pair of yoke portions 211A corresponding to the pair of stator cores 211 .

The insertion member 24 is inserted through the insertion hole 211D. The insertion hole 211D is implemented by the inner peripheral surfaces of the yoke portion 211A and the yoke portion 211C.

The winding 212 is wound in an annular shape when viewed in the axial direction. The winding 212 has one end electrically connected to an external terminal and the other end electrically connected to a neutral point. The windings 212 are arranged between the pair of stator cores 211 (yoke portions 211A) in the axial direction. In addition, the winding 212 is wound so that the inner peripheral portion is radially outside the yoke portions 211C of the pair of stator cores 211 . Note that the winding 212 is sometimes called a "coil".

An insulating portion (not shown) is arranged to electrically insulate between the windings 212 and the stator core 211 . The insulating part is, for example, an insulating paper, a resin-molded insulator, silicone rubber, or a resin mold for the stator core 211 or the windings 212 , which is arranged between the stator core 211 and the windings 212 . Also, the insulating portion may be, for example, a resin insulating film provided on the surface of the conductor wire of the winding 212 .

As shown in FIG. 2, the pair of stator cores 211 are combined so that the claw poles 211B of one stator core 211 and the claw poles 211B of the other stator core 211 are alternately arranged in the circumferential direction. . Further, when an armature current flows through the annular winding 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 to different magnetic poles. be done. As a result, in the pair of stator cores 211, one claw pole 211B projecting from one stator core 211 is adjacent in the circumferential direction and has a different magnetic pole from the other claw pole 211B projecting from the other stator core 211. have Therefore, due to the armature current flowing through the windings 212 , the N pole claw magnetic poles 211 B and the S pole claw magnetic poles 211 B are alternately arranged in the circumferential direction of the pair of stator cores 211 .

As shown in FIGS. 2 and 4, the plurality of stator units 21 are stacked in the axial direction. The plurality of stator units 21 includes stator units 21 for a plurality of phases (three phases in this example). Specifically, the plurality of stator units 21 includes 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 stacked in the order of the U-phase stator unit 21A, the V-phase stator unit 21B, and the W-phase stator unit 21C from the tip of the motor 1. be. The stator units 21A to 21C are arranged such that their circumferential positions differ from each other by an electrical angle of 120°.

The motor 1 may be driven by a two-phase armature current, or may be driven by a four-phase or more armature current.

The interphase member 22 is provided between the stator units 21 of different phases adjacent in the axial direction. Interphase member 22 is, for example, a non-magnetic material. As a result, 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. Interphase member 22 includes UV interphase member 22A and VW interphase member 22B.

The UV interphase member 22A is provided between the U-phase stator unit 21A and the V-phase stator unit 21B, which are axially adjacent to each other. The UV interphase member 22A has, for example, a substantially cylindrical shape (substantially disk shape) with a predetermined thickness, and an insertion hole through which the insertion member 24 is inserted is formed in the central portion. Hereinafter, the same may be applied to the VW interphase member 22B.

The VW interphase member 22B is provided between the V-phase stator unit 21B and the W-phase stator unit 21C, which are axially adjacent to each other.

The end member 23 is provided at the end of the plurality of stacked stator units 21 on the tip side of the motor 1 . Specifically, the end member 23 is provided so as to come into contact with the end surface of the stator unit 21A 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) having a predetermined thickness, and an insertion hole through which the insertion member 24 is inserted is formed in the central portion. The end member 23 can suppress magnetic flux leakage from the stator unit 21A (specifically, the stator core 211 on the tip end side of the motor 1) by forming the end member 23 from, for example, a non-magnetic material. In addition, the end member 23 and the fixed member 30 sandwich the plurality of stacked stator units 21 , so that the movement of the plurality of stator units 21 in the axial direction of the rotation axis AX can be restricted. Further, the end member 23 may contact the entire end face of the stator core 211, or may contact a part of the end face of the stator core 211 as shown in FIG.

The end portion of the insertion member 24 is fixed to the fixing member 30 while the end member 23, the stator unit 21A, the UV interphase member 22A, the stator unit 21B, the VW interphase member 22B, and the stator unit 21C are inserted. . The inserting member 24 has, for example, a male threaded portion at its distal end, and is fixed to the fixing member 30 by being screwed into a corresponding female threaded portion of the fixing member 30 .

Also, the insertion member 24 has, for example, a substantially cylindrical shape, and the rotating shaft member 13 is rotatably arranged in a hole realized by the inner peripheral surface.

Bearings

25 and 26 that rotatably support the rotary shaft member 13 are provided at both ends of the insertion member 24 in the axial direction.

Also, the insertion member 24 has, for example, a head portion having an outer diameter relatively larger than the inner diameter of the insertion hole 211D of the stator unit 21 on the tip side of the motor 1 . As a result, for example, by tightening the insertion member 24 to the fixing member 30 to some extent, a force in the axial direction toward the fixing member 30 can be applied from the head portion to the end member 23 . Therefore, a plurality of stator units 21 (stator units 21A to 21C) and interphase members 22 (UV interphase members 22A and VW interphase members 22B) are fixed to the fixing member 30 in such a manner that they are sandwiched between the end member 23 and the fixing member 30. be able to. The dust core has relatively low strength against tensile stress, but relatively high strength against compressive stress. Therefore, the stator core 211 formed of the dust core can be fixed to the stator units 21A to 21C in such a manner that compressive stress acts on it.

The fixed member 30 has, for example, a substantially disc shape with an outer diameter larger than that of the rotor 10 (rotor core 11) when viewed in the axial direction, and has a predetermined thickness in the axial direction. As shown in FIG. 4, the fixing member 30 rotatably supports the rotor 10 via the insertion member 24, and the stator 20 is fixed.

[First embodiment]
Next, a structure unique to the motor 1 according to the first embodiment will be described with reference to FIGS. 5 to 7. FIG. FIG. 5 is a perspective view of the motor 1 according to the first embodiment. FIG. 6 is a top view of the motor 1 according to the first embodiment. 5 and 6, illustration of the rotor 10 included in the motor 1 is omitted. FIG. 7 is a longitudinal sectional view showing an example of the configuration of the motor 1 according to the first embodiment. 7 to 12 show only the stator units 21 at the ends in the axial direction, and the illustration of the intermediate stator units 21 in the axial direction is omitted.

As shown in FIGS. 5 to 7, the motor 1 according to the first embodiment includes an end portion (specifically, a stator A plurality of radiating fins 40 are provided on a surface of the yoke portion 211A of the iron core 211 facing the connecting member 14 . In the examples shown in FIGS. 5 and 6, the motor 1 according to the first embodiment includes three heat radiation fins 40 concentrically arranged. In the example shown in FIG. 7, the motor 1 according to the first embodiment includes seven heat radiation fins 40 concentrically arranged. Each of the plurality of radiation fins 40 has an annular shape centered on the rotation axis AX when viewed in the axial direction, but has different radii. In the example shown in FIG. 7, the end member 23 is in contact with a portion of the end surface of the stator core 211 (a portion of the inner peripheral surface side in the radial direction). Moreover, in the example shown in FIG. 7 , the plurality of heat radiation fins 40 are provided radially outside the outer peripheral surface of the end member 23 so as not to come into contact with the end member 23 .

As described above, the motor 1 according to the first embodiment includes the plurality of heat radiation fins 40 in the stator unit 21, thereby increasing the surface area of the stator unit 21 and generating the windings 212 in the stator unit 21. The heat dissipation effect of the heat energy generated can be enhanced.

In particular, in the motor 1 according to the first embodiment, since the stator unit 21A farthest from the fixing member 30 is provided with a plurality of heat radiation fins 40, the temperature of the stator unit 21A tends to be higher than that of the other stator units 21. can enhance the heat dissipation effect of Therefore, the motor 1 according to the first embodiment can suppress unevenness in temperature among the plurality of stator units 21 .

Further, since the motor 1 according to the first embodiment includes a plurality of heat radiation fins 40 at the ends of the stator unit 21A in the axial direction, the plurality of stator units 21 and the plurality of permanent magnets 12 in the magnetic circuit The heat dissipation effect of the stator unit 21A can be enhanced without enlarging the air gap between them.

In addition, in the claw pole type motor, the heat radiation path of the winding is mainly a path for heat radiation from the winding to the outside air via the fixing member. However, in the claw pole type motor, the windings are covered with the stator core, and there are few surfaces exposed to the air, so the windings tend to retain heat. In addition, since the claw pole motor has a structure in which stator units are laminated, a plurality of members (for example, an insulating member, a stator core, and an interphase member) are interposed in the heat dissipation path from the windings to the fixed member. The thermal resistance of the path increases and the heat transfer is poor. For these reasons, it is difficult for the heat from the windings to escape from the claw pole type motor.

In particular, since the stator unit 21A is the farthest from the fixed member 30, it is difficult to transfer the thermal energy generated by the windings 212 to the fixed member 30. Therefore, the temperature of the stator unit 21A tends to be higher than that of the other stator units 21 .

Note that the heat radiation fins 40 may be formed integrally with the stator core 211 . Moreover, the heat radiation fins 40 may be a separate member from the stator core 211, and may be fixed to the stator core 211 by any fixing method (for example, bolting, welding, etc.). If the heat radiation fins 40 are separate members from the stator core 211, they may be formed integrally with the end members 23, and fixed to the end members 23 by any method (for example, bolting, welding, etc.). May be fixed.

Further, it is preferable that the radiation fins 40 are made of a material with high thermal conductivity (eg, aluminum, iron, copper, etc.). Thereby, the motor 1 according to the first embodiment can further enhance the heat dissipation effect of the heat dissipation fins 40 .

Also, it is preferable that the radiation fins 40 be made of a non-magnetic material (eg, aluminum, stainless steel, brass, etc.). As a result, the motor 1 according to the first embodiment can suppress magnetic flux leakage from the stator unit 21A (stator core 211) to the connecting member 14. FIG.

[Second embodiment]
Next, a structure unique to the motor 1 according to the second embodiment will be described with reference to FIG. FIG. 8 is a longitudinal sectional view showing an example of the configuration of the motor 1 according to the second embodiment.

As shown in FIG. 8, in the motor 1 according to the second embodiment, similarly to the motor 1 according to the first embodiment, the end of the stator unit 21 (stator unit 21A) farthest from the fixing member 30 in the axial direction is A plurality of radiating fins 40 arranged concentrically are provided in the portion. As a result, the motor 1 according to the second embodiment can enhance the heat dissipation effect of the stator unit 21A, like the motor 1 according to the first embodiment. In the example shown in FIG. 8, the end member 23 is in contact with a portion of the end surface of the stator core 211 (a portion of the inner peripheral surface in the radial direction). Moreover, in the example shown in FIG. 8 , the plurality of radiation fins 40 are provided radially outside the outer peripheral surface of the end member 23 so as not to come into contact with the end member 23 .

Also, as shown in FIG. 8, the motor 1 according to the second embodiment has a through hole 42 in the connecting member 14 . The through hole 42 axially penetrates the connecting member 14 . Thus, in the motor 1 according to the second embodiment, heat energy generated by the windings 212 of the stator unit 21A is easily radiated to the outside through the gaps A.

Further, as shown in FIG. 8, the motor 1 according to the second embodiment is provided with the through hole 42, so that the space surrounded by the rotor core 11 and the connecting member 14 has the through hole 42 from the gap A. A flow path B for fluid is formed. Flow path B is connected to the outside of rotor 10 through gap A and through hole 42 . As a result, the motor 1 according to the second embodiment can easily dissipate heat energy generated by the plurality of stator units 21 (windings 212 ) to the outside through the gaps A and the through holes 42 .

[Third embodiment]
Next, a structure unique to the motor 1 according to the third embodiment will be described with reference to FIG. FIG. 9 is a longitudinal sectional view showing an example of the configuration of the motor 1 according to the third embodiment.

As shown in FIG. 9 , the motor 1 according to the third embodiment has a plurality of heat radiation fins 40 on the end member 23 of the stator 20 . Specifically, the motors 1 according to the third embodiment are arranged concentrically on each of the surface of the end member 23 on the fixing member 30 side and the surface of the end member 23 on the connecting member 14 side. A plurality of radiation fins 40 are provided. Each of the plurality of radiation fins 40 has an annular shape centered on the rotation axis AX when viewed in the axial direction, but has a different radius. As a result, the motor 1 according to the third embodiment can enhance the heat radiation effect of the stator unit 21A, like the motor 1 according to the first embodiment.

In particular, as shown in FIG. 9, each of the plurality of heat radiating fins 40 provided on the surface of the end member 23 on the side of the fixing member 30 has a leading end that extends from the stator core 211 ( It is in contact with the surface of the yoke portion 211A) facing the connecting member 14 . Accordingly, in the motor 1 according to the third embodiment, the heat generated by the windings 212 of the stator unit 21A is dissipated by each of the plurality of radiation fins 40 provided on the surface of the end member 23 on the side of the fixing member 30. Energy is transferred and the thermal energy can be dissipated. Further, the motor 1 according to the third embodiment can restrict the axial movement of the plurality of stacked stator units 21 .

Furthermore, the motor 1 according to the third embodiment is provided with a plurality of heat radiation fins 40 on both sides of the end member 23, so that the surface area of the end member 23 is further expanded, and the heat is transmitted from the stator unit 21A. The heat dissipation effect of thermal energy can be further enhanced.

FIG. 10 is a longitudinal sectional view showing a modification of the configuration of the motor 1 according to the third embodiment. In the example shown in FIG. 10 , the radiation fins 40 are provided only on the surface of the end member 23 facing the connecting member 14 . In the example shown in FIG. 10 , the surface of the end member 23 facing the stator core 211 is in contact with the end surface of the stator core 211 . That is, in this modified example, the contact surface of the end member 23 with the stator unit 21A is made plate-shaped instead of fin-shaped to increase the contact area. According to this modified example, the heat transfer from the stator unit 21A to the end member 23 can be further improved, and the fixation of the plurality of stator units 21 in the axial direction can be made stronger. Therefore, the contact surface of the end member 23 with the stator unit 21A may be plate-shaped instead of fin-shaped to increase the contact area.

[Fourth embodiment]
Next, a structure specific to the motor 1 according to the fourth embodiment will be described with reference to FIG. 11 . FIG. 11 is a longitudinal sectional view showing an example of the configuration of the motor 1 according to the fourth embodiment.

As shown in FIG. 11, in the motor 1 according to the fourth embodiment, similarly to the motor 1 according to the first embodiment, the end of the stator unit 21 (stator unit 21A) farthest from the fixing member 30 in the axial direction is A plurality of radiating fins 40 arranged concentrically are provided in the portion. As a result, the motor 1 according to the fourth embodiment can enhance the heat dissipation effect of the stator unit 21A, like the motor 1 according to the first embodiment.

As shown in FIG. 11, the motor 1 according to the fourth embodiment has a plurality of second heat radiating fins 44 concentrically arranged on the inner surface of the connecting member 14 (the surface facing the plurality of heat radiating fins 40). Prepare. Like the plurality of heat radiation fins 40, each of the plurality of second heat radiation fins 44 has an annular shape centered on the rotation axis AX when viewed in the axial direction, but has a different radius. However, as shown in FIG. 11, in the motor 1 according to the fourth embodiment, by making the radius of each of the plurality of second heat radiation fins 44 different from the radius of each of the plurality of heat radiation fins 40, , the plurality of heat radiation fins 40 and the plurality of second heat radiation fins 44 are arranged so as to overlap alternately without interfering with each other. In the example shown in FIG. 11, the end member 23 is in contact with a portion of the end surface of the stator core 211 (a portion of the inner peripheral surface in the radial direction). Further, in the example shown in FIG. 11, the plurality of heat radiation fins 40 and the plurality of second heat radiation fins 44 are provided radially outside the outer peripheral surface of the end member 23 so as not to come into contact with the end member 23. It is

The motor 1 according to the fourth embodiment includes a plurality of second heat radiation fins 44 on the inner surface of the connecting member 14 to increase the surface area of the inner surface of the connecting member 14 so that the windings 212 of the stator unit 21A The generated thermal energy can be easily transmitted to the connecting member 14 and can be easily dissipated by the connecting member 14 .

[Fifth embodiment]
Next, a structure specific to the motor 1 according to the fifth embodiment will be described with reference to FIG. 12 . FIG. 12 is a longitudinal sectional view showing an example of the configuration of the motor 1 according to the fifth embodiment.

As shown in FIG. 12, in the motor 1 according to the fifth embodiment, similarly to the motor 1 according to the first embodiment, the end of the stator unit 21 (stator unit 21A) farthest from the fixing member 30 in the axial direction is A plurality of radiating fins 40 arranged concentrically are provided in the portion. As a result, the motor 1 according to the fifth embodiment can enhance the heat dissipation effect of the stator unit 21A, like the motor 1 according to the first embodiment. In the example shown in FIG. 12, the end member 23 is in contact with a portion of the end surface of the stator core 211 (a portion of the inner peripheral surface side in the radial direction). Moreover, in the example shown in FIG. 12 , the plurality of radiation fins 40 are provided radially outside the outer peripheral surface of the end member 23 so as not to contact the end member 23 .

Further, as shown in FIG. 12, the motor 1 according to the fifth embodiment is provided with a fan 46 (an example of a "second fan") on the surface of the connecting member 14 facing the plurality of heat radiating fins 40. there is The fan 46 rotates about the rotation axis AX together with the connecting member 14, thereby generating an airflow rotating about the rotation axis AX in the space between the radiation fins 40 and the stator unit 21A. As a result, the motor 1 according to the fifth embodiment can increase the flow velocity of the air around the heat radiating fins 40 , thereby increasing the heat transfer rate from the heat radiating fins 40 to the air and increasing the cooling effect of the heat radiating fins 40 . can increase

[Example of application to air blower]
Next, an application example of the motor 1 according to the present embodiment to the blower device 100 will be described with reference to FIG. 13 . FIG. 13 is a diagram showing an application example of the motor 1 according to this embodiment to the blower device 100. As shown in FIG.

The blower shown in FIG. 13 can be used, for example, in air conditioners, refrigerators, and the like. As shown in FIG. 13, the blower device 100 includes a motor 1 according to this embodiment and a fan 48 (impeller). Note that any one of the motors 1 described in the first to fifth embodiments can be used for the blower device 100. FIG.

As shown in FIG. 13 , the motor 1 according to the present embodiment has the fan 48 attached to the rotor 10 in the blower device 100, so that the fan 48 is rotated integrally with the rotor 10, and the fan 48 blows air. It can be performed.

In the example shown in FIG. 13, the fan 48 has the rotor 10 attached to one end side in the axial direction, and an intake port 48A is provided to the other end side in the axial direction. Further, the fan 48 is provided with a plurality of exhaust ports 48B along the circumferential direction of the outer peripheral surface.

The fan 48 is driven by the motor 1 to rotate, so that the gas sucked from the intake port 48A can be blown outward in the radial direction of the fan 48 from the exhaust port 48B, as indicated by the arrow in FIG. can.

As described above, the motor 1 according to the present embodiment can be used as the motor 1 for rotationally driving the fan 48 in the blower device 100 to enhance the heat dissipation effect of the motor 1 .

In the example shown in FIG. 13, the tip of the motor 1 is covered with the fan 48, so the wind (the wind indicated by the arrow in the figure) generated by the rotation of the fan 48 flows on the rotor surface. Thereby, the heat transfer coefficient from the stator 20 to the outside air is improved, and the heat radiation effect can be further enhanced.

In addition, in the motor 1 according to the present embodiment, the fluid that exchanges heat with the heat radiating fins 40 may be air or a refrigerant.

[Example of Shape and Arrangement of Radiation Fins 40]
FIG. 14 is a diagram showing an example of the shape and arrangement of the heat radiation fins 40 included in the motor 1 according to this embodiment.

As shown in FIG. 14, in the motor 1 according to this embodiment, the radiation fins 40 may have a plurality of plate-like members or a plurality of pin-like members concentrically arranged. The motor 1 according to the present embodiment has a plurality of plate-like members or a plurality of pin-like members in which the heat radiating fins 40 are arranged concentrically. It is possible to suppress ventilation resistance.

Further, as shown in FIG. 14, in the motor 1 according to this embodiment, the heat radiation fins 40 may have a plurality of plate-like members or a plurality of pin-like members arranged radially. The motor 1 according to the present embodiment has a plurality of plate-like members or a plurality of pin-like members in which the heat dissipating fins 40 are arranged radially. can increase

However, the shape, arrangement, and number of the radiation fins 40 are not limited to those illustrated in this embodiment and FIG.

[Other embodiments]
FIG. 15 is a vertical cross-sectional view showing an example of the configuration of a motor 300 according to another embodiment. A motor 300 shown in FIG. 15 is a so-called inner rotor type claw pole motor. Motor 300 has housing 301 , rotor 310 and stator 320 . The motor 300 has a rotor 310 (a rotor core 311, a permanent magnet 312, and a rotating shaft member 313) inside a housing 301, and a stator 320 (a plurality of stacked stator units 321) having a cylindrical shape. It differs from the motor 1, which is an outer rotor type claw pole motor, in that it rotates inside.

The housing 301 has a cylindrical shape with both ends in the axial direction closed. A rotor 310 and a stator 320 are arranged inside the housing 301 . A rotating shaft member 313 of the rotor 310 is provided through the center of the housing 301 . Both ends of the rotating shaft member 313 are rotatably supported by a pair of

bearings

303 and 304 provided at both ends of the housing 301 in the axial direction.

The rotor 310 is arranged inside the stator 320 in the radial direction inside the housing 301 . Rotor 310 has rotor core 311 , permanent magnets 312 , and rotating shaft member 313 . Rotor core 311 has a cylindrical shape. A rotary shaft member 313 is arranged in the cylinder of the rotor core 311 . Rotor core 311 rotates together with rotary shaft member 313 . The plurality of permanent magnets 312 are arranged side by side at equal intervals in the circumferential direction on the outer peripheral surface of the rotor core 311 . The permanent magnet 312 faces the inner peripheral surface (claw magnetic pole 322A) of the stator 320 (the plurality of stator units 321).

The stator 320 is arranged outside the rotor 310 in the radial direction inside the housing 301 . Stator 320 has a generally cylindrical shape overall. The stator 320 has a plurality of claw pole type stator units 321 stacked in the axial direction. In the example shown in FIG. 3, the stator 320 has three claw pole

type stator units

321A, 321B, 321C that are axially stacked. Each stator unit 321 has a pair of stator cores 322 and windings 323 like the stator unit 21 included in the motor 1 . However, as shown in FIG. 15, in the stator core 322, the plurality of claw poles 322A are arranged in the circumferential direction on the inner peripheral surface of the stator core 322 so as to face the permanent magnets 312 provided in the rotor 310. placed at intervals.

As shown in FIG. 15, a motor 300 according to another embodiment includes a plurality of heat radiation fins 340 on one axial end face (specifically, the end face of the stator unit 321A). Also, the motor 300 according to another embodiment includes a plurality of radiation fins 340 on the other axial end surface (specifically, the end surface of the stator unit 321C). In the example shown in FIG. 15, a motor 300 according to another embodiment includes seven heat radiation fins 340 concentrically arranged on each of one end surface and the other end surface in the axial direction.

Since the motor 300 according to another embodiment is an inner rotor type claw pole motor, it is located in a space enclosed by the housing 301, so the heat energy generated by the windings 323 of each stator unit 321 is It becomes difficult to dissipate heat.

Therefore, in the motor 300 according to another embodiment, each of the

stator units

321A and 321C is provided with a plurality of radiation fins 340, thereby increasing the surface area of each of the

stator units

321A and 321C. Therefore, the heat dissipation effect of each of the

stator units

321A and 321C can be enhanced.

Since the motor 300 according to another embodiment is an inner rotor type claw pole motor, it is not necessary to provide a fixing member on one end side in the axial direction. A plurality of radiating fins 340 can be installed on both end faces in the axial direction of 321 .

In addition, since the motor 300 according to another embodiment is an inner rotor type claw pole motor, it can be used not only in a blower device but also in a compressor provided in a refrigeration device or the like.

In addition, in the motor 300 according to another embodiment, only one end face in the axial direction (specifically, the end face of the stator unit 321A) may be provided with a plurality of heat radiating fins 340. Also, in the motor 300 according to another embodiment, only the other end face in the axial direction (specifically, the end face of the stator unit 321C) may be provided with a plurality of radiation fins 340 .

[Action]
Next, operation of the motor 1 according to this embodiment will be described.

The motor 1 according to the present embodiment includes a rotor 10 configured to be rotatable around the rotation axis AX, a winding 212 annularly wound around the rotation axis AX, and A stator 20 having a claw pole type stator unit 21 including a stator core 211 (iron core) provided to Radiating fins 40 are provided in the part.

As a result, the motor 1 according to the present embodiment does not have fins on the outer peripheral surface of the stator unit 21, and does not expand the air gap. By increasing the surface area of the stator unit 21 , the heat generated in the stator unit 21 can be dissipated from the radiating fins 40 . Therefore, according to the motor 1 of this embodiment, the heat radiation effect of the stator unit 21 can be improved without enlarging the air gap in the magnetic circuit.

Also, the motor 1 according to this embodiment may include the fixed member 30 that supports the stator 20 , and the heat radiation fins 40 may be provided at the farthest end of the stator unit 21 from the fixed member 30 .

As a result, in the motor 1 according to the present embodiment, the heat radiation fins 40 are configured such that the temperature of the stator unit 21 farthest from the fixing member 30 tends to be the highest, and the heat dissipation effect of the stator unit 21 farthest from the fixing member 30 is reduced. By increasing the temperature deviation among the plurality of stator units 21 can be suppressed.

Further, in the motor 1 according to the present embodiment, the radiation fins 40 may restrict the movement of the stator 20 in the axial direction of the rotation axis AX by coming into contact with the stator unit 21 .

As a result, the motor 1 according to the present embodiment has both the effect of improving the heat radiation performance of the stator unit 21 and the effect of restricting the movement of the stator 20 in the axial direction of the rotation axis AX by the heat radiation fins 40. can be played.

Further, in the motor 1 according to this embodiment, the stator 20 may have two or more stator units 21 stacked in the axial direction of the rotation axis AX.

As a result, in the motor 1 according to the present embodiment, the heat radiation fins 40 are arranged in the outermost stator unit 21 in the axial direction of the rotation axis AX in a configuration in which uneven temperature is likely to occur among the plurality of stator units 21 . By enhancing the heat dissipation effect of the stator units 21, unevenness in temperature among the plurality of stator units 21 can be suppressed.

Further, the motor 1 according to the present embodiment may have a flow path B through which fluid can be introduced from the outside of the space in which the stator 20 is arranged.

As a result, the motor 1 according to the present embodiment can easily dissipate heat energy generated by the stator unit 21 to the outside through the flow path B.

Also, in the motor 1 according to this embodiment, the rotor 10 may be configured to rotate outside the stator 20 .

As a result, in the motor 1 according to the present embodiment, in a configuration where the temperature of the stator unit 21 tends to increase because it is surrounded by the rotor 10, the heat radiation fins 40 provided on the stator unit 21 allow the stator unit The heat dissipation effect of 21 can be enhanced.

Also, the motor 1 according to this embodiment may include a fan 48 attached to the outer surface of the rotor 10 .

As a result, the motor 1 according to the present embodiment has a configuration in which the temperature of the stator unit 21 provided inside the rotor 10 is likely to rise because the rotor 10 is covered with the fan 48. The heat dissipation fins 40 provided on the stator unit 21 can enhance the heat dissipation effect of the stator unit 21 .

Also, the motor 1 according to the present embodiment may include second heat radiation fins 44 provided on the inner surface of the rotor 10 facing the heat radiation fins 40 .

As a result, the motor 1 according to the present embodiment is provided with the second heat radiation fins 44 so that the surface area of the inner surface of the rotor 10 is increased, and the heat energy generated by the stator unit 21 is transferred to the rotor 10. The heat can be easily transmitted and the heat can be easily dissipated by the rotor 10 .

Further, in the motor 1 according to this embodiment, the heat radiation fins 40 may be formed on the stator core 211 of the stator unit 21.

As a result, the motor 1 according to the present embodiment does not require the work of attaching the heat radiation fins 40 to the stator core 211, for example. Further, the motor 1 according to the present embodiment can improve heat transfer from the stator core 211 to the heat radiation fins 40, for example.

Further, in the motor 1 according to this embodiment, the heat radiation fins 40 may be separate parts from the stator core 211 of the stator unit 21 .

Thereby, in the motor 1 according to this embodiment, for example, the material of the radiation fins 40 can be made different from the material of the stator core 211 . Further, in the motor 1 according to the present embodiment, for example, the heat radiation fins 40 can be replaced.

Further, the blower device 100 according to this embodiment includes a fan 48 (impeller) that blows air by rotating, and the motor 1 according to this embodiment that drives the fan 48 to rotate.

As a result, the blower device 100 according to the present embodiment can improve the heat radiation effect of the motor 1 while suppressing deterioration in the performance of the motor 1 that drives the fan 48 .

Also, the motor 1 according to the present embodiment may be used to rotationally drive the compression mechanism in a compression device having a compression mechanism that compresses fluid by rotating.

As a result, the motor 1 according to the present embodiment can improve the heat dissipation effect of the motor 1 while suppressing deterioration in the performance of the motor 1 that drives the compression mechanism to rotate in the compression device.

Further, the motor 1 according to the present embodiment is a refrigerating apparatus including a blower having an impeller that blows air by rotating and a compressor having a compression mechanism that compresses fluid by rotating. Alternatively, it may be used to rotationally drive the compression mechanism.

As a result, the motor 1 according to the present embodiment can enhance the heat radiation effect of the motor 1 while suppressing performance deterioration of the motor 1 that drives the impeller or the compression mechanism to rotate in the refrigeration system.

[Transformation/change]
Although the embodiments have been described above, it will be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the claims.

This international application claims priority based on Japanese Patent Application No. 2021-057103 filed on March 30, 2021, and the entire contents of this application are incorporated into this international application.

Reference Signs List 1 motor 10

rotor

11, 11A to 11C rotor core 12 permanent magnet 13 rotating shaft member 14 connecting member 20

stator

21, 21A to 21C stator unit 211 stator core 211A yoke portion 211B claw magnetic pole

211C yoke portion

211D insertion hole 212 Winding 22 Interphase member 22A UV Interphase member 22B VW Interphase member 23 End member 24

Penetration member

25, 26 Bearing 30 Fixed member 40 Radiation fin 42 Through hole 44 Second radiation fin 46 Fan 48 Fan 48A Intake port 48B Exhaust port 50 oil 100 air blower 300 motor 301

housing

303, 304 bearing 310 rotor 311 rotor core 312 permanent magnet 313 rotating shaft member 320

stator

321, 321A, 321B, 321C stator unit 322 stator core 322A claw magnetic pole 323 winding Wire 340 Radiation fin

Claims

a rotor configured to be rotatable around a rotation axis;
a stator having a claw pole type stator unit including a winding wound annularly around the rotation axis and an iron core provided to surround the winding,
A motor having radiation fins at the outermost end of the stator unit in the axial direction of the rotation axis.
A fixing member that supports the stator,
The heat radiation fins are
The motor according to claim 1, provided at the end of the stator unit farthest from the fixed member.
3. The motor according to claim 2, wherein the heat radiation fins restrict movement of the stator in the axial direction of the rotation axis by contacting the stator unit.
4. The motor according to any one of claims 1 to 3, wherein the stator includes two or more stator units stacked in the axial direction of the rotation axis.
5. The motor according to any one of claims 1 to 4, wherein the space in which the stator is arranged has a flow path through which a fluid can be introduced from the outside of the space.
The rotor is
6. A motor according to any one of the preceding claims, arranged to rotate outside the stator.
7. The motor of claim 6, comprising a fan attached to the outer surface of the rotor.
The motor according to claim 6 or 7, further comprising second heat radiation fins provided on an inner surface of the rotor facing the heat radiation fins.
The heat radiation fins are
9. The motor according to any one of claims 1 to 8, which is formed in an iron core of the stator unit.
The heat radiation fins are
The motor according to any one of claims 1 to 8, which is a separate part from the iron core of the stator unit.
The motor according to any one of claims 1 to 10, further comprising a second fan provided in a space in which the stator is arranged and rotating together with the rotor.
The heat radiation fins are
12. The motor according to any one of claims 1 to 11, comprising a plurality of plate-like members or a plurality of pin-like members arranged concentrically.
The heat radiation fins are
12. The motor according to any one of claims 1 to 11, comprising a plurality of plate-like members or a plurality of pin-like members arranged radially.
an impeller that blows air by rotating;
The motor according to any one of claims 1 to 13, which rotationally drives the impeller.
a compression mechanism that compresses the fluid by rotating;
and the motor according to any one of claims 1 to 6 and 8 to 13, which rotationally drives the compression mechanism.
A refrigeration system comprising the blower device according to claim 14 or the compression device according to claim 15.