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WO2023013197A1 - Motor and method for manufacturing motor - Google Patents

Motor and method for manufacturing motor Download PDF

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Publication number
WO2023013197A1
WO2023013197A1 PCT/JP2022/019743 JP2022019743W WO2023013197A1 WO 2023013197 A1 WO2023013197 A1 WO 2023013197A1 JP 2022019743 W JP2022019743 W JP 2022019743W WO 2023013197 A1 WO2023013197 A1 WO 2023013197A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
resin portion
motor
resin
coil end
Prior art date
Application number
PCT/JP2022/019743
Other languages
French (fr)
Japanese (ja)
Inventor
公亮 竹田
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN202290000300.8U priority Critical patent/CN220605696U/en
Priority to JP2023539655A priority patent/JPWO2023013197A1/ja
Publication of WO2023013197A1 publication Critical patent/WO2023013197A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08—Insulating casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets

Definitions

  • the present invention relates to motors and motor manufacturing methods.
  • Patent Literature 1 discloses a rotating electric machine having a case through which a first coolant flows.
  • the case includes a water jacket through which cooling water flows as the first coolant. By providing the water jacket, the rotating electric machine can be cooled by water cooling.
  • the water jacket is positioned in the case that houses the stator.
  • it is necessary to bring the inner surface of the case into contact with the outer peripheral surface of the stator.
  • a gap may occur between the case and the stator. Therefore, it is difficult to efficiently transfer the heat of the stator to the water jacket.
  • the cooling efficiency is not so good in the configuration in which the stator is cooled by the water jacket as in Patent Document 1.
  • An object of the present invention is to provide a motor that can efficiently cool the stator.
  • a motor includes a stator having a cylindrical stator core extending along an axis and a stator coil wound around the stator core; and a resin portion covering at least a portion of the radially outer side of the stator core.
  • the resin portion has a cooling portion that cools the stator on the radially outer side.
  • a motor manufacturing method is a method for manufacturing a motor having the above configuration.
  • the method of manufacturing the motor includes a stator forming step of forming a stator, and a resin molding step of forming a resin portion having a cooling portion on the radially outer side by molding at least a part of the radially outer side of the stator with a resin. and a casing housing step of housing the stator molded with the resin in a casing.
  • FIG. 1 is a diagram schematically showing a schematic configuration of a motor according to Embodiment 1.
  • FIG. 2 is a diagram illustrating a method of manufacturing a motor.
  • FIG. 3 is a view equivalent to FIG. 1 according to a modification of the first embodiment.
  • FIG. 4 is a view corresponding to FIG. 1 of the motor according to the second embodiment.
  • the direction parallel to the central axis P is defined as the "axial direction”
  • the direction perpendicular to the central axis P is defined as the "radial direction”
  • the direction along an arc centered on the central axis P is defined as the “axis direction.” Circumferential direction”, respectively.
  • this definition is not intended to limit the orientation of the motor 1 when in use.
  • FIG. 1 is a diagram showing a schematic configuration of a motor 1 according to Embodiment 1 of the present invention.
  • a motor 1 includes a rotor 2 , a stator 3 , a resin portion 4 and a casing 5 .
  • the rotor 2 rotates around the central axis P with respect to the stator 3 .
  • the motor 1 is a so-called inner rotor type motor in which a rotor 2 is rotatably positioned about a central axis P within a cylindrical stator 3 .
  • the rotor 2 includes a shaft 20 , a rotor core 21 and rotor magnets 22 .
  • the rotor 2 is positioned radially inward of the stator 3 and is rotatable with respect to the stator 3 . Since the configuration of the rotor 2 is the same as that of the conventional configuration, detailed description of the rotor 2 is omitted.
  • the stator 3 is cylindrical.
  • the rotor 2 is positioned radially inward of the stator 3 . That is, the stator 3 is positioned facing the rotor 2 in the radial direction.
  • the rotor 2 is rotatably positioned about the central axis P radially inward of the stator 3 .
  • the stator 3 includes a stator core 31 and stator coils 32 .
  • the stator coil 32 is wound around the stator core 31 .
  • the stator core 31 is cylindrical.
  • the stator core 31 has a plurality of slots arranged in the circumferential direction on its inner peripheral surface. Each slot extends axially with respect to the stator 3 . Each slot accommodates an axially extending stator coil 32 . Illustration of the slots is omitted.
  • stator coil 32 accommodated in each slot of the stator core 31 protrudes outward from the axial end of the stator core 31 .
  • Coil ends 33 are portions of the stator coil 32 that protrude from both ends of the stator core 31 in the axial direction.
  • the coil ends 33 are positioned axially outward from both ends of the stator core 31 in the axial direction.
  • the resin portion 4 covers the stator 3. Specifically, the resin portion 4 covers the radially outer side of the stator core 31 of the stator 3 , the radially outer side and the radially inner side of the coil ends 33 of the stator 3 , and the axial ends of the coil ends 33 . .
  • the coil ends 33 of the stator 3 and the rotor 2 are electrically insulated by the resin portion 4 .
  • the resin portion 4 has a cooling portion 46 for cooling the stator 3 on the radially outer side.
  • the stator 3 is cooled by the cooling portion 46 of the resin portion 4 .
  • the casing 5 is cylindrical.
  • a casing 5 houses the rotor 2 and the stator 3 .
  • the radially outer side of the resin portion 4 is in contact with the inner surface of the casing 5 .
  • the stator core 31 whose radial outside is covered with the resin portion 4 can be held with respect to the casing 5 .
  • the configuration of the resin portion 4 will be described with reference to FIG.
  • the resin portion 4 is formed by molding the stator 3 with resin. That is, the resin portion 4 is in close contact with the radially outer side of the stator core 31 . In addition, the resin portion 4 is in close contact with the coil end 33 as a whole. That is, the stator 3 and the resin portion 4 are integrated.
  • the resin portion 4 contains an epoxy resin.
  • the resin portion 4 includes a stator core radially outer resin portion 41 , a coil end radially outer resin portion 42 , a coil end axial resin portion 43 , and a coil end radially inner resin portion 44 .
  • the stator core radially outer resin portion 41, the coil end radially outer resin portion 42, the coil end axial resin portion 43, and the coil end radially inner resin portion 44 are integrated.
  • the stator core radially outer resin portion 41 is a portion of the resin portion 4 located radially outward of the stator core 31 of the stator 3 .
  • the coil end radially outer resin portion 42 is a portion of the resin portion 4 located radially outward of the coil end 33 .
  • the coil end axial resin portion 43 is a portion of the resin portion 4 located axially outward of the coil end 33 .
  • the coil end radially inner resin portion 44 is a portion of the resin portion 4 located radially inward of the coil end 33 .
  • the resin portion 4 has a stator core radially outer resin portion 41 that covers the radially outer side of the stator core 31 of the stator 3 .
  • the resin portion 4 has a coil end radially outer resin portion 42 that covers the radially outer side of the coil end 33 of the stator 3 .
  • the resin portion 4 has a coil end axial resin portion 43 that covers the axial ends of the coil ends 33 of the stator 3 .
  • the resin portion 4 has a coil end radially inner resin portion 44 that covers the radially inner side of the coil end 33 of the stator 3 .
  • the resin portion 4 has the cooling portion 46 that cools the stator 3 on the radially outer side.
  • the cooling section 46 has a stator core cooling section 46a and a coil end cooling section 46b.
  • the stator core cooling portion 46 a is positioned radially outward of the stator core radially outer resin portion 41 .
  • the coil end cooling portion 46 b is located radially outside the coil end radially outer resin portion 42 .
  • the cooling portion 46 has a concave portion 48 on the radially outer side of the resin portion 4 .
  • the recesses 48 are positioned radially outward of the stator core 31 and radially outward of the coil ends 33 in the resin portion 4 . That is, the stator core cooling portion 46a positioned radially outward of the stator core radially outer resin portion 41 and the coil end cooling portion 46b positioned radially outwardly of the coil end radially outer resin portion 42 each have a recess 48.
  • the recess 48 is a groove that extends radially outward of the stator core radially outer resin portion 41 and the coil end radially outer resin portion 42 in the circumferential direction.
  • the concave portion 48 of the cooling portion 46 can increase the radially outer surface area of the resin portion 4 . Also, the resin portion 4 is in close contact with the stator 3 . That is, heat of the stator 3 can be cooled by the cooling portion 46 of the resin portion 4 having the concave portion 48 on the radially outer side.
  • a passage R is formed between the casing 5 and the recessed portion 48 of the cooling portion 46 positioned radially outwardly of the resin portion 4 .
  • the passage R is positioned radially outwardly of the stator core 31 and the coil ends 33 and extends in the circumferential direction.
  • the passage R spirally extends from one axial direction of the motor 1 to the other axial direction.
  • the depth of the concave portion 48 is the same in the circumferential direction. Further, the intervals in the axial direction of the concave portions 48 are uniform.
  • the opening width of the concave portion 48 is the same width in the circumferential direction. That is, the cross-sectional shape of the passage R is the same from one axial direction to the other axial direction of the motor 1 .
  • cold water for cooling is made to flow in the passage R. As shown in FIG.
  • the resin portion 4 contains an epoxy resin. Therefore, the resin can be brought into close contact with the radially outer side of the stator core 31 and the coil ends 33, and the strength of the resin covering the radially outer side of the stator core 31 can be ensured. In addition, since the resin portion 4 contains epoxy resin, the heat of the stator 3 can be efficiently transmitted to the cooling portion 46 . Therefore, the stator 3 can be efficiently cooled.
  • the coil end axial resin portion 43 covers the axial end of the coil end 33 of the stator 3 . Thereby, electrical insulation between the axial ends of the coil ends 33 and components located in the vicinity thereof can be ensured.
  • the coil end radially inner resin portion 44 covers the radially inner side of the coil end 33 of the stator 3 .
  • the coil ends 33 of the stator 3 and the rotor 2 can be electrically insulated by the resin portion 4 . Therefore, the distance between the coil end 33 and the rotor 2 can be made closer. Therefore, a compact and high-output motor 1 can be realized.
  • the motor 1 includes the stator 3, the rotor 2, and the resin portion 4.
  • the stator 3 has a cylindrical stator core 31 extending along its axis and a stator coil 32 wound around the stator core 31 .
  • the rotor 2 is positioned radially inside the stator core 31 and rotates with respect to the stator 3 .
  • the resin portion 4 covers at least a portion of the radially outer side of the stator core 31 .
  • the resin portion 4 has a cooling portion that cools the stator 3 on the radially outer side.
  • the resin portion 4 covering the radially outer side of the stator core 31 has the function of cooling the stator 3 . Therefore, the heat of the stator 3 can be efficiently transmitted from the stator core 31 to the cooling portion 46 of the resin portion 4 by bringing the resin portion 4 into close contact with the radially outer side of the stator core 31 . Therefore, the stator 3 can be efficiently cooled by the cooling portion 46 of the resin portion 4 .
  • the resin portion 4 has a coil end radially outer resin portion 42 that covers the radially outer side of the coil end 33 of the stator 3 .
  • the cooling portion 46 has a coil end cooling portion 46 b located radially outside the coil end radially outer resin portion 42 . Thereby, the coil ends 33 of the stator 3 can be cooled by the coil end cooling portions 46 b of the resin portion 4 .
  • the cooling portion 46 has a concave portion 48 on the radially outer side of the resin portion 4 .
  • the heat of the stator 3 can be efficiently cooled by the recesses 48 .
  • the stator 3 can be cooled more efficiently by flowing cold water for cooling through the recesses 48 .
  • the recess 48 is a groove extending in the circumferential direction.
  • the stator 3 can be cooled in the circumferential direction.
  • the stator 3 can be cooled more efficiently by flowing cold water for cooling inside the recess 48 .
  • the method for manufacturing the motor 1 includes a stator forming process, a resin molding process, and a casing accommodating process.
  • stator coil 32 is wound around the stator core 31 .
  • stator 3 having the coil ends 33 axially outside the axial end portions of the stator core 31 is formed.
  • the radially outer side of the stator 3 is molded with resin.
  • the stator 3 is positioned within the mold M.
  • the molding die M has a convex portion Ma for forming the concave portion 48 of the cooling portion 46 on the radially outer side of the resin portion 4 .
  • Resin is injected into the molding die M with the stator 3 positioned therein.
  • the stator 3 is molded with resin, and the recessed portion 48 of the cooling portion 46 is formed radially outside the resin portion 4 . That is, the resin part 4 having the cooling part 46 on the radially outer side is formed by the resin molding process.
  • the resin-molded stator 3 is housed in the casing 5 .
  • the radially outer side of the resin portion 4 contacts the inner surface of the casing 5 . Therefore, the passage R is formed by the recess located radially outside of the resin portion 4 and the inner surface of the casing 5 .
  • the method for manufacturing the motor 1 according to the present embodiment includes a stator forming step for forming the stator 3, and molding of at least a part of the radially outer side of the stator 3 with a resin to form the cooling portion 46 on the radially outer side. a resin molding step of forming the resin portion 4 having the resin portion 4; and a casing housing step of housing the stator 3 molded with the resin in the casing.
  • FIG. 3 is a diagram showing the motor 101 according to a modification of the first embodiment.
  • a motor 101 according to this modification differs in the configuration of a recess 148 from the configuration of the recess 48 in the motor 1 of the first embodiment.
  • Other configurations are the same as those of the first embodiment.
  • symbol is attached
  • the motor 101 includes a rotor 2, a stator 3, a resin portion 104, and a casing 5.
  • the resin portion 104 includes a stator core radially outer resin portion 141, a coil end radially outer resin portion 142, a coil end axial resin portion 43, and a coil end radially inner resin portion 44.
  • the stator core radially outer resin portion 141 covers the radially outer side of the stator core 31 of the stator 3 .
  • the coil end radially outer resin portion 142 covers the radially outer side of the coil end 33 of the stator 3 .
  • the resin portion 104 has a cooling portion 146 on the radially outer side.
  • the cooling section 146 has a stator core cooling section 146a and a coil end cooling section 146b.
  • the stator core cooling portion 146 a is positioned radially outward of the stator core radially outer resin portion 141 .
  • the coil end cooling portion 146 b is located radially outside the coil end radially outer resin portion 142 .
  • the cooling portion 146 has a concave portion 148 on the radially outer side of the resin portion 104 .
  • the recessed portions 148 are composed of a first recessed portion 148 a located radially outward of the stator core 31 in the resin portion 104 and a second recessed portion located radially outward of the coil end 33 of the stator 3 in the resin portion 104 . 148b and .
  • the depth of the second recess 148b is greater than the depth of the first recess 148a. That is, in the present embodiment, the position of the bottom surface of the second recess 148b of the cooling portion 146 is closer to the coil end 33 than the position of the bottom surface of the radially outer recess 48 of the coil end 33 of the first embodiment. As a result, the coil ends 33 can be cooled more efficiently than when the recesses located outside the stator core 31 and the recesses located outside the coil ends 33 have the same depth.
  • FIG. 4 is a diagram showing the motor 201 according to the second embodiment.
  • Motor 201 includes rotor 2 , stator 3 , resin portion 204 , casing 5 and metal member 206 .
  • the motor 201 includes a metal member 206 inside or radially outside the resin portion 204 .
  • Other configurations are the same as those of the first embodiment.
  • symbol is attached
  • the resin portion 204 has a cooling portion 46 on the radially outer side.
  • the metal member 206 is a metal member.
  • the metal member 206 has a cylindrical shape extending in the axial direction of the motor 201 .
  • Metal member 206 is positioned inside resin portion 204 . Specifically, in the radial direction of the stator 3, the metal member 206 is positioned radially outward of the stator core 31 in the resin portion 204 and inward of the bottom surface of the recess 48, and extends in the axial direction. That is, the metal member 206 surrounds the stator 3 radially outward.
  • the metal member 206 can be embedded inside the resin portion 204 in the process of molding the stator 3, for example. By positioning the metal member 206 inside the resin portion 204, the strength of the resin portion 204 can be improved, and the heat transfer rate of the resin portion 204 can be improved, so that the stator 3 can be cooled more efficiently by the resin portion 204. can.
  • the resin portions 4, 104, 204 are composed of the stator core radial direction outer resin portions 41, 141, the coil end radial direction outer resin portions 42, 142, the coil end axial direction resin portion 43, the coil end diameter and a direction inner resin portion 44 .
  • the resin portion may not have the coil end radially outer resin portion.
  • the resin portion may not have the coil end axial resin portion.
  • the resin portion may not have the coil end radially inner resin portion.
  • the resin portion may cover at least a portion of the radially outer side of the stator core 31 .
  • stator core radially outer resin portions 41, 141, the coil end radially outer resin portions 42, 142, the coil end axial direction resin portion 43, and the coil end radially inner resin portions of the resin portions 4, 104, 204 44 is integral.
  • stator core radially outer resin portion, the coil end radially outer resin portion, the coil end axial resin portion, and the coil end radially inner resin portion may not be integrated.
  • the recesses 48, 148 of the cooling portions 46, 146 are grooves extending in the circumferential direction.
  • the recess need not extend circumferentially.
  • the recess may be a plurality of holes positioned radially outwardly of the resin portion.
  • the radially outer surface of the resin portion may have an uneven shape. Thereby, the surface area of the radially outer side of the resin portion can be increased. Therefore, the heat of the stator can be efficiently cooled.
  • cold water for cooling is made to flow in the concave portions 48 and 148 of the cooling portions 46 and 146 .
  • other liquids such as oil for cooling may be flowed into the recess.
  • a gas may be flowed into the recess.
  • the axial intervals of the recesses 48, 148 in the cooling portions 46, 146 are uniform. Also, the opening widths of the recesses 48 and 148 are the same in the circumferential direction. However, the axial spacing of the recesses may not be uniform. The opening width of the recess may not be the same width in the circumferential direction.
  • the cooling portion 46 includes the stator core cooling portion 46 a located radially outside the stator core radially outer resin portion 41 and the coil end cooling portion 46 a located radially outside the coil end radially outside resin portion 42 . and a cooling portion 46b.
  • the cooling section may not have the coil end cooling section.
  • the entire radially outer side of the resin portions 4 , 104 , 204 is in contact with the inner surface of the casing 5 .
  • a part of the radially outer side of the resin portion may be in contact with the inner surface of the casing.
  • the stator core 31 having at least a portion of the radially outer side covered with the resin portion can be held with respect to the casing.
  • the metal member 206 has a cylindrical shape extending in the axial direction of the motor 201 and surrounds the stator core 31 radially outward.
  • the metal member may have a shape surrounding part of the stator core.
  • the metal member may be a plurality of metal pieces extending in the axial direction of the motor.
  • the present invention can be used for motors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

This motor comprises: a stator having a cylindrical stator core extending along an axis and a stator coil wound around the stator core; a rotor that is positioned radially inward of the stator core and rotates with respect to the stator; and a resin part covering at least a radially outward portion of the stator core. The resin part has, on radially outward side, a cooling portion that cools the stator.

Description

モータ及びモータの製造方法Motor and motor manufacturing method
　本発明は、モータ及びモータの製造方法に関する。 The present invention relates to motors and motor manufacturing methods.
　ステータを冷却するための構成を備えるモータが知られている。例えば、特許文献１には、第一冷媒が通流されるケースを有する回転電機が開示されている。前記ケースは、前記第一冷媒として冷却水が通流されるウォータージャケットを備えている。前記ウォータージャケットを備えることによって、水冷により回転電機を冷却することができる。 A motor with a configuration for cooling the stator is known. For example, Patent Literature 1 discloses a rotating electric machine having a case through which a first coolant flows. The case includes a water jacket through which cooling water flows as the first coolant. By providing the water jacket, the rotating electric machine can be cooled by water cooling.
特開２０１９－１６１８９９JP 2019-161899
　特許文献１の構成では、前記ウォータージャケットは、ステータを収容するケースに位置している。前記ステータから前記ウォータージャケットに熱を効率良く伝達させるためには、前記ケースの内面を前記ステータの外周面に接触させる必要がある。しかしながら、前記ケース内に前記ステータを収納する際に、前記ケースと前記ステータとの間に隙間が生じる可能性がある。したがって、前記ステータの熱を前記ウォータージャケットに効率良く伝達することは難しい。すなわち、特許文献１のように、ウォータージャケットによってステータを冷却する構成では、冷却効率はあまり良くない。 In the configuration of Patent Document 1, the water jacket is positioned in the case that houses the stator. In order to efficiently transfer heat from the stator to the water jacket, it is necessary to bring the inner surface of the case into contact with the outer peripheral surface of the stator. However, when housing the stator in the case, a gap may occur between the case and the stator. Therefore, it is difficult to efficiently transfer the heat of the stator to the water jacket. In other words, the cooling efficiency is not so good in the configuration in which the stator is cooled by the water jacket as in Patent Document 1.
　本発明の目的は、ステータを効率良く冷却可能なモータを提供することである。 An object of the present invention is to provide a motor that can efficiently cool the stator.
　本発明の一実施形態に係るモータは、軸線に沿って延びる円筒状のステータコア及び前記ステータコアに巻線されたステータコイルを有するステータと、前記ステータコアの径方向内方に位置し、且つ、前記ステータに対して回転するロータと、少なくとも前記ステータコアの径方向外側の一部を覆う樹脂部と、を備える。前記樹脂部は、径方向外側に、前記ステータを冷却する冷却部を有する。 A motor according to an embodiment of the present invention includes a stator having a cylindrical stator core extending along an axis and a stator coil wound around the stator core; and a resin portion covering at least a portion of the radially outer side of the stator core. The resin portion has a cooling portion that cools the stator on the radially outer side.
　本発明の一実施形態に係るモータの製造方法は、上記の構成を有するモータを製造する方法である。前記モータの製造方法は、ステータを形成するステータ形成工程と、前記ステータの径方向外側の少なくとも一部を樹脂によってモールドすることにより、径方向外側に冷却部を有する樹脂部を形成する樹脂モールド工程と、前記樹脂によってモールドされた前記ステータをケーシング内に収容するケーシング収容工程と、を有する。 A motor manufacturing method according to an embodiment of the present invention is a method for manufacturing a motor having the above configuration. The method of manufacturing the motor includes a stator forming step of forming a stator, and a resin molding step of forming a resin portion having a cooling portion on the radially outer side by molding at least a part of the radially outer side of the stator with a resin. and a casing housing step of housing the stator molded with the resin in a casing.
　本発明の一実施形態によれば、ステータを効率良く冷却可能なモータを提供することができる。 According to one embodiment of the present invention, it is possible to provide a motor capable of efficiently cooling the stator.
図１は、実施形態１に係るモータの概略構成を模式的に示す図である。FIG. 1 is a diagram schematically showing a schematic configuration of a motor according to Embodiment 1. FIG. 図２は、モータを製造する方法を説明する図である。FIG. 2 is a diagram illustrating a method of manufacturing a motor. 図３は、実施形態１の変形例に係る図１相当図である。FIG. 3 is a view equivalent to FIG. 1 according to a modification of the first embodiment. 図４は、実施形態２に係るモータの図１相当図である。FIG. 4 is a view corresponding to FIG. 1 of the motor according to the second embodiment.
　以下、図面を参照し、本発明の例示的な実施の形態を詳しく説明する。なお、図中の同一または相当部分については同一の符号を付してその説明は繰り返さない。また、各図中の構成部材の寸法は、実際の構成部材の寸法及び各構成部材の寸法比率等を忠実に表しているわけではない。 Exemplary embodiments of the present invention will be described in detail below with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated. Also, the dimensions of the constituent members in each drawing do not faithfully represent the actual dimensions of the constituent members, the dimensional ratios of the respective constituent members, and the like.
　なお、以下では、モータ１の説明において、中心軸Ｐと平行な方向を「軸方向」、中心軸Ｐに直交する方向を「径方向」、中心軸Ｐを中心とする円弧に沿う方向を「周方向」とそれぞれ称する。ただし、この定義により、モータ１の使用時の向きを限定する意図はない。 In the description of the motor 1 below, the direction parallel to the central axis P is defined as the "axial direction," the direction perpendicular to the central axis P is defined as the "radial direction," and the direction along an arc centered on the central axis P is defined as the "axis direction." Circumferential direction”, respectively. However, this definition is not intended to limit the orientation of the motor 1 when in use.
　また、以下の説明において、“固定”、“接続”及び“取り付ける”等（以下、固定等）の表現は、部材同士が直接、固定等されている場合だけでなく、他の部材を介して固定等されている場合も含む。すなわち、以下の説明において、固定等の表現には、部材同士の直接的及び間接的な固定等の意味が含まれる。 In addition, in the following description, expressions such as “fixed”, “connected” and “attached” (hereinafter referred to as “fixed”) are used not only when members are directly fixed to each other, but also when they are fixed via other members. It also includes cases where it is fixed. That is, in the following description, expressions such as fixing include meanings such as direct and indirect fixing between members.
　（実施形態１）
　（モータの構成）
　図１は、本発明の実施形態１に係るモータ１の概略構成を示す図である。モータ１は、ロータ２と、ステータ３と、樹脂部４と、ケーシング５とを備える。ロータ２は、ステータ３に対して、中心軸Ｐを中心として回転する。本実施形態では、モータ１は、円筒状のステータ３内に、ロータ２が中心軸Ｐを中心として回転可能に位置する、いわゆるインナーロータ型のモータである。 (Embodiment 1)
(Motor configuration)
FIG. 1 is a diagram showing a schematic configuration of a motor 1 according to Embodiment 1 of the present invention. A motor 1 includes a rotor 2 , a stator 3 , a resin portion 4 and a casing 5 . The rotor 2 rotates around the central axis P with respect to the stator 3 . In this embodiment, the motor 1 is a so-called inner rotor type motor in which a rotor 2 is rotatably positioned about a central axis P within a cylindrical stator 3 .
　ロータ２は、シャフト２０と、ロータコア２１と、ロータ磁石２２とを備える。ロータ２は、ステータ３の径方向内方に位置し、ステータ３に対して回転可能である。ロータ２の構成は、従来の構成と同様であるため、ロータ２についての詳しい説明を省略する。 The rotor 2 includes a shaft 20 , a rotor core 21 and rotor magnets 22 . The rotor 2 is positioned radially inward of the stator 3 and is rotatable with respect to the stator 3 . Since the configuration of the rotor 2 is the same as that of the conventional configuration, detailed description of the rotor 2 is omitted.
　ステータ３は、円筒状である。ステータ３の径方向内方には、ロータ２が位置する。すなわち、ステータ３は、径方向にロータ２に対向して位置する。ロータ２は、ステータ３の径方向内方に、中心軸Ｐを中心として回転可能に位置する。 The stator 3 is cylindrical. The rotor 2 is positioned radially inward of the stator 3 . That is, the stator 3 is positioned facing the rotor 2 in the radial direction. The rotor 2 is rotatably positioned about the central axis P radially inward of the stator 3 .
　ステータ３は、ステータコア３１と、ステータコイル３２とを備える。ステータコイル３２は、ステータコア３１に巻回されている。 The stator 3 includes a stator core 31 and stator coils 32 . The stator coil 32 is wound around the stator core 31 .
　ステータコア３１は、円筒状である。ステータコア３１は、内周面に周方向に並んだ複数のスロットを有する。各スロットは、ステータ３に対して軸方向に延びている。各スロット内には、軸方向に延びるステータコイル３２が収容されている。スロットの図示は省略する。 The stator core 31 is cylindrical. The stator core 31 has a plurality of slots arranged in the circumferential direction on its inner peripheral surface. Each slot extends axially with respect to the stator 3 . Each slot accommodates an axially extending stator coil 32 . Illustration of the slots is omitted.
　ステータコア３１の各スロット内に収容されたステータコイル３２は、ステータコア３１の軸方向端部から外方に突出している。ステータコイル３２のうちステータコア３１の軸方向両端部からそれぞれ突出している部分が、コイルエンド３３である。 The stator coil 32 accommodated in each slot of the stator core 31 protrudes outward from the axial end of the stator core 31 . Coil ends 33 are portions of the stator coil 32 that protrude from both ends of the stator core 31 in the axial direction.
　コイルエンド３３は、ステータコア３１の軸方向両端部に対して、それぞれ、軸方向外方に位置する。 The coil ends 33 are positioned axially outward from both ends of the stator core 31 in the axial direction.
　樹脂部４は、ステータ３を覆っている。詳細には、樹脂部４は、ステータ３のステータコア３１の径方向外側と、ステータ３のコイルエンド３３の径方向外側及び径方向内側と、コイルエンド３３の軸方向端部と、を覆っている。樹脂部４によって、ステータ３のコイルエンド３３とロータ２とは電気的に絶縁される。 The resin portion 4 covers the stator 3. Specifically, the resin portion 4 covers the radially outer side of the stator core 31 of the stator 3 , the radially outer side and the radially inner side of the coil ends 33 of the stator 3 , and the axial ends of the coil ends 33 . . The coil ends 33 of the stator 3 and the rotor 2 are electrically insulated by the resin portion 4 .
　また、樹脂部４は、径方向外側に、ステータ３を冷却する冷却部４６を有している。樹脂部４の冷却部４６によって、ステータ３が冷却される。 In addition, the resin portion 4 has a cooling portion 46 for cooling the stator 3 on the radially outer side. The stator 3 is cooled by the cooling portion 46 of the resin portion 4 .
　ケーシング５は、円筒状である。ケーシング５は、ロータ２及びステータ３を収容している。樹脂部４の径方向外側は、ケーシング５の内面に接触している。これにより、樹脂部４によって径方向外側が覆われたステータコア３１を、ケーシング５に対して保持することができる。 The casing 5 is cylindrical. A casing 5 houses the rotor 2 and the stator 3 . The radially outer side of the resin portion 4 is in contact with the inner surface of the casing 5 . As a result, the stator core 31 whose radial outside is covered with the resin portion 4 can be held with respect to the casing 5 .
　（樹脂部の構成）
　図１を参照して、樹脂部４の構成について説明する。樹脂部４は、ステータ３を樹脂でモールドすることにより形成されている。すなわち、樹脂部４は、ステータコア３１の径方向外側に密着している。また、樹脂部４は、コイルエンド３３全体にも密着している。すなわち、ステータ３と樹脂部４とは、一体化している。本実施形態では、樹脂部４は、エポキシ系の樹脂を含む。 (Structure of resin part)
The configuration of the resin portion 4 will be described with reference to FIG. The resin portion 4 is formed by molding the stator 3 with resin. That is, the resin portion 4 is in close contact with the radially outer side of the stator core 31 . In addition, the resin portion 4 is in close contact with the coil end 33 as a whole. That is, the stator 3 and the resin portion 4 are integrated. In this embodiment, the resin portion 4 contains an epoxy resin.
　本実施形態では、樹脂部４は、ステータコア径方向外側樹脂部４１と、コイルエンド径方向外側樹脂部４２と、コイルエンド軸方向樹脂部４３と、コイルエンド径方向内側樹脂部４４と、を有する。本実施形態では、ステータコア径方向外側樹脂部４１、コイルエンド径方向外側樹脂部４２、コイルエンド軸方向樹脂部４３及びコイルエンド径方向内側樹脂部４４は、一体である。 In the present embodiment, the resin portion 4 includes a stator core radially outer resin portion 41 , a coil end radially outer resin portion 42 , a coil end axial resin portion 43 , and a coil end radially inner resin portion 44 . . In this embodiment, the stator core radially outer resin portion 41, the coil end radially outer resin portion 42, the coil end axial resin portion 43, and the coil end radially inner resin portion 44 are integrated.
　ステータコア径方向外側樹脂部４１は、樹脂部４のうち、ステータ３のステータコア３１の径方向外方に位置する部分である。コイルエンド径方向外側樹脂部４２は、樹脂部４のうち、コイルエンド３３の径方向外方に位置する部分である。コイルエンド軸方向樹脂部４３は、樹脂部４のうち、コイルエンド３３の軸方向外方に位置する部分である。コイルエンド径方向内側樹脂部４４は、樹脂部４のうち、コイルエンド３３の径方向内方に位置する部分である。 The stator core radially outer resin portion 41 is a portion of the resin portion 4 located radially outward of the stator core 31 of the stator 3 . The coil end radially outer resin portion 42 is a portion of the resin portion 4 located radially outward of the coil end 33 . The coil end axial resin portion 43 is a portion of the resin portion 4 located axially outward of the coil end 33 . The coil end radially inner resin portion 44 is a portion of the resin portion 4 located radially inward of the coil end 33 .
　すなわち、樹脂部４は、ステータ３のステータコア３１の径方向外側を覆うステータコア径方向外側樹脂部４１を有する。樹脂部４は、ステータ３のコイルエンド３３の径方向外側を覆うコイルエンド径方向外側樹脂部４２を有する。樹脂部４は、ステータ３のコイルエンド３３の軸方向端部を覆うコイルエンド軸方向樹脂部４３を有する。樹脂部４は、ステータ３のコイルエンド３３の径方向内側を覆うコイルエンド径方向内側樹脂部４４を有する。 That is, the resin portion 4 has a stator core radially outer resin portion 41 that covers the radially outer side of the stator core 31 of the stator 3 . The resin portion 4 has a coil end radially outer resin portion 42 that covers the radially outer side of the coil end 33 of the stator 3 . The resin portion 4 has a coil end axial resin portion 43 that covers the axial ends of the coil ends 33 of the stator 3 . The resin portion 4 has a coil end radially inner resin portion 44 that covers the radially inner side of the coil end 33 of the stator 3 .
　上述したように、樹脂部４は、径方向外側に、ステータ３を冷却する冷却部４６を有する。本実施形態では、冷却部４６は、ステータコア冷却部４６ａと、コイルエンド冷却部４６ｂと、を有する。ステータコア冷却部４６ａは、ステータコア径方向外側樹脂部４１径方向外側に位置する。コイルエンド冷却部４６ｂは、コイルエンド径方向外側樹脂部４２の径方向外側に位置する。 As described above, the resin portion 4 has the cooling portion 46 that cools the stator 3 on the radially outer side. In this embodiment, the cooling section 46 has a stator core cooling section 46a and a coil end cooling section 46b. The stator core cooling portion 46 a is positioned radially outward of the stator core radially outer resin portion 41 . The coil end cooling portion 46 b is located radially outside the coil end radially outer resin portion 42 .
　本実施形態では、冷却部４６は、樹脂部４の径方向外側に、凹部４８を有する。凹部４８は、樹脂部４においてステータコア３１の径方向外方及びコイルエンド３３の径方向外方に位置する。すなわち、ステータコア径方向外側樹脂部４１の径方向外側に位置するステータコア冷却部４６ａ及びコイルエンド径方向外側樹脂部４２の径方向外側に位置するコイルエンド冷却部４６ｂは、それぞれ、凹部４８を有する。本実施形態では、凹部４８は、ステータコア径方向外側樹脂部４１及びコイルエンド径方向外側樹脂部４２の径方向外側を周方向に延びる溝である。 In this embodiment, the cooling portion 46 has a concave portion 48 on the radially outer side of the resin portion 4 . The recesses 48 are positioned radially outward of the stator core 31 and radially outward of the coil ends 33 in the resin portion 4 . That is, the stator core cooling portion 46a positioned radially outward of the stator core radially outer resin portion 41 and the coil end cooling portion 46b positioned radially outwardly of the coil end radially outer resin portion 42 each have a recess 48. In the present embodiment, the recess 48 is a groove that extends radially outward of the stator core radially outer resin portion 41 and the coil end radially outer resin portion 42 in the circumferential direction.
　冷却部４６の凹部４８によって、樹脂部４の径方向外側の表面積を大きくすることができる。また、樹脂部４は、ステータ３に密着している。すなわち、樹脂部４の冷却部４６が径方向外側に凹部４８を有することによって、ステータ３の熱を冷却することができる。 The concave portion 48 of the cooling portion 46 can increase the radially outer surface area of the resin portion 4 . Also, the resin portion 4 is in close contact with the stator 3 . That is, heat of the stator 3 can be cooled by the cooling portion 46 of the resin portion 4 having the concave portion 48 on the radially outer side.
　上述したように、樹脂部４の径方向外側は、ケーシング５の内面と接触している。これにより、樹脂部４の径方向外側に位置する冷却部４６の凹部４８とケーシング５との間には、通路Ｒが構成される。通路Ｒは、ステータコア３１及びコイルエンド３３に対して径方向外方に位置し、周方向に延びている。 As described above, the radially outer side of the resin portion 4 is in contact with the inner surface of the casing 5 . Thus, a passage R is formed between the casing 5 and the recessed portion 48 of the cooling portion 46 positioned radially outwardly of the resin portion 4 . The passage R is positioned radially outwardly of the stator core 31 and the coil ends 33 and extends in the circumferential direction.
　通路Ｒは、モータ１の軸方向一方から他方に向かってらせん状に延びている。本実施形態では、凹部４８の深さは、周方向で同じ深さである。また、凹部４８の前記軸方向の間隔は均等である。また、凹部４８の開口幅は、周方向で同じ幅である。すなわち、通路Ｒの断面形状は、モータ１の軸方向一方から他方にわたって同一である。本実施形態では、通路Ｒ内には、冷却用の冷水が流される。 The passage R spirally extends from one axial direction of the motor 1 to the other axial direction. In this embodiment, the depth of the concave portion 48 is the same in the circumferential direction. Further, the intervals in the axial direction of the concave portions 48 are uniform. Moreover, the opening width of the concave portion 48 is the same width in the circumferential direction. That is, the cross-sectional shape of the passage R is the same from one axial direction to the other axial direction of the motor 1 . In this embodiment, cold water for cooling is made to flow in the passage R. As shown in FIG.
　本実施形態では、樹脂部４は、エポキシ系の樹脂を含む。よって、ステータコア３１の径方向外側及びコイルエンド３３に樹脂を密着させることができるとともに、ステータコア３１の径方向外側を覆う樹脂の強度を確保することができる。また、樹脂部４は、エポキシ系の樹脂を含むことにより、ステータ３の熱を冷却部４６に効率良く伝達することができる。よって、ステータ３を効率良く冷却することができる。 In this embodiment, the resin portion 4 contains an epoxy resin. Therefore, the resin can be brought into close contact with the radially outer side of the stator core 31 and the coil ends 33, and the strength of the resin covering the radially outer side of the stator core 31 can be ensured. In addition, since the resin portion 4 contains epoxy resin, the heat of the stator 3 can be efficiently transmitted to the cooling portion 46 . Therefore, the stator 3 can be efficiently cooled.
　コイルエンド軸方向樹脂部４３は、ステータ３のコイルエンド３３の軸方向端部を覆っている。これにより、コイルエンド３３の軸方向端部と、その近傍に位置する構成部品との電気的絶縁を確保することができる。 The coil end axial resin portion 43 covers the axial end of the coil end 33 of the stator 3 . Thereby, electrical insulation between the axial ends of the coil ends 33 and components located in the vicinity thereof can be ensured.
　コイルエンド径方向内側樹脂部４４は、ステータ３のコイルエンド３３の径方向内側を覆っている。これにより、ステータ３のコイルエンド３３とロータ２とを、樹脂部４によって電気的に絶縁することができる。よって、コイルエンド３３とロータ２との距離をより近づけることができる。したがって、コンパクトで高出力のモータ１を実現することができる。 The coil end radially inner resin portion 44 covers the radially inner side of the coil end 33 of the stator 3 . Thereby, the coil ends 33 of the stator 3 and the rotor 2 can be electrically insulated by the resin portion 4 . Therefore, the distance between the coil end 33 and the rotor 2 can be made closer. Therefore, a compact and high-output motor 1 can be realized.
　以上説明したように、モータ１は、ステータ３と、ロータ２と、樹脂部４と、を備える。ステータ３は、軸線に沿って延びる円筒状のステータコア３１及びステータコア３１に巻線されたステータコイル３２を有する。ロータ２は、ステータコア３１の径方向内側に位置し、且つ、ステータ３に対して回転する。樹脂部４は、少なくともステータコア３１の径方向外側の一部を覆っている。樹脂部４は、径方向外側に、ステータ３を冷却する冷却部を有している。 As described above, the motor 1 includes the stator 3, the rotor 2, and the resin portion 4. The stator 3 has a cylindrical stator core 31 extending along its axis and a stator coil 32 wound around the stator core 31 . The rotor 2 is positioned radially inside the stator core 31 and rotates with respect to the stator 3 . The resin portion 4 covers at least a portion of the radially outer side of the stator core 31 . The resin portion 4 has a cooling portion that cools the stator 3 on the radially outer side.
　上述の構成では、ステータコア３１の径方向外側を覆う樹脂部４が、ステータ３を冷却する機能を有する。よって、ステータコア３１の径方向外側に樹脂部４を密着させて、ステータ３の熱をステータコア３１から樹脂部４の冷却部４６に効率良く伝達することができる。したがって、樹脂部４の冷却部４６によって、ステータ３を効率良く冷却することができる。 In the above configuration, the resin portion 4 covering the radially outer side of the stator core 31 has the function of cooling the stator 3 . Therefore, the heat of the stator 3 can be efficiently transmitted from the stator core 31 to the cooling portion 46 of the resin portion 4 by bringing the resin portion 4 into close contact with the radially outer side of the stator core 31 . Therefore, the stator 3 can be efficiently cooled by the cooling portion 46 of the resin portion 4 .
　また、本実施形態では、樹脂部４は、ステータ３のコイルエンド３３の径方向外側を覆うコイルエンド径方向外側樹脂部４２を有する。冷却部４６は、コイルエンド径方向外側樹脂部４２の径方向外側に位置するコイルエンド冷却部４６ｂを有する。これにより、ステータ３のコイルエンド３３を、樹脂部４のコイルエンド冷却部４６ｂによって冷却することができる。 In addition, in the present embodiment, the resin portion 4 has a coil end radially outer resin portion 42 that covers the radially outer side of the coil end 33 of the stator 3 . The cooling portion 46 has a coil end cooling portion 46 b located radially outside the coil end radially outer resin portion 42 . Thereby, the coil ends 33 of the stator 3 can be cooled by the coil end cooling portions 46 b of the resin portion 4 .
　本実施形態では、冷却部４６は、樹脂部４の径方向外側に、凹部４８を有している。凹部４８によって、ステータ３の熱を効率良く冷却することができる。しかも、凹部４８に冷却用の冷水を流すことにより、ステータ３をより効率良く冷却することができる。 In this embodiment, the cooling portion 46 has a concave portion 48 on the radially outer side of the resin portion 4 . The heat of the stator 3 can be efficiently cooled by the recesses 48 . Moreover, the stator 3 can be cooled more efficiently by flowing cold water for cooling through the recesses 48 .
　本実施形態では、凹部４８は、周方向に延びる溝である。これにより、ステータ３を周方向に冷却することができる。しかも、凹部４８内に冷却用の冷水を流すことにより、ステータ３をより効率良く冷却することができる。 In this embodiment, the recess 48 is a groove extending in the circumferential direction. Thereby, the stator 3 can be cooled in the circumferential direction. Moreover, the stator 3 can be cooled more efficiently by flowing cold water for cooling inside the recess 48 .
　（モータの製造方法）
　図２を参照して、実施形態１に係るモータ１を製造する方法について説明する。モータ１の製造方法は、ステータ形成工程と、樹脂モールド工程と、ケーシング収容工程と、を有する。 (Motor manufacturing method)
A method of manufacturing the motor 1 according to the first embodiment will be described with reference to FIG. The method for manufacturing the motor 1 includes a stator forming process, a resin molding process, and a casing accommodating process.
　ステータ形成工程は、ステータコア３１に、ステータコイル３２を巻回する。これにより、ステータコア３１の軸方向両端部に対して軸方向外側にコイルエンド３３を有するステータ３が形成される。 In the stator forming process, the stator coil 32 is wound around the stator core 31 . As a result, the stator 3 having the coil ends 33 axially outside the axial end portions of the stator core 31 is formed.
　樹脂モールド工程は、ステータ３の径方向外側を樹脂によってモールドする。詳細には、まず、ステータ３を成形型Ｍ内に位置付ける。図２に示すように、成形型Ｍは、樹脂部４の径方向外側に冷却部４６の凹部４８を形成するための凸部Ｍａを有している。成形型Ｍ内に、ステータ３を位置付けた状態で、成形型Ｍ内に樹脂を射出する。これにより、ステータ３が樹脂によってモールドされるとともに、樹脂部４の径方向外側に冷却部４６の凹部４８が形成される。すなわち、樹脂モールド工程によって、径方向外側に冷却部４６を有する樹脂部４が形成される。 In the resin molding process, the radially outer side of the stator 3 is molded with resin. Specifically, first, the stator 3 is positioned within the mold M. As shown in FIG. As shown in FIG. 2 , the molding die M has a convex portion Ma for forming the concave portion 48 of the cooling portion 46 on the radially outer side of the resin portion 4 . Resin is injected into the molding die M with the stator 3 positioned therein. As a result, the stator 3 is molded with resin, and the recessed portion 48 of the cooling portion 46 is formed radially outside the resin portion 4 . That is, the resin part 4 having the cooling part 46 on the radially outer side is formed by the resin molding process.
　ケーシング収容工程は、樹脂モールドされたステータ３をケーシング５内に収容する。この工程によって、樹脂部４の径方向外側がケーシング５の内面に接触する。よって、樹脂部４の径方向外側に位置する凹部とケーシング５の内面とによって、通路Ｒが構成される。 In the casing housing step, the resin-molded stator 3 is housed in the casing 5 . Through this process, the radially outer side of the resin portion 4 contacts the inner surface of the casing 5 . Therefore, the passage R is formed by the recess located radially outside of the resin portion 4 and the inner surface of the casing 5 .
　すなわち、本実施形態に係るモータ１の製造方法は、ステータ３を形成するステータ形成工程と、ステータ３の径方向外側の少なくとも一部を樹脂によってモールドすることにより、径方向外側に冷却部４６を有する樹脂部４を形成する樹脂モールド工程と、前記樹脂によってモールドされたステータ３をケーシング内に収容するケーシング収容工程と、を有する。 That is, the method for manufacturing the motor 1 according to the present embodiment includes a stator forming step for forming the stator 3, and molding of at least a part of the radially outer side of the stator 3 with a resin to form the cooling portion 46 on the radially outer side. a resin molding step of forming the resin portion 4 having the resin portion 4; and a casing housing step of housing the stator 3 molded with the resin in the casing.
　この製造方法により、ステータを効率良く冷却可能なモータ１を得ることができる。 With this manufacturing method, it is possible to obtain the motor 1 that can efficiently cool the stator.
　（実施形態１の変形例）
　図３は、実施形態１の変形例に係るモータ１０１を示す図である。本変形例に係るモータ１０１は、凹部１４８の構成が実施形態１のモータ１における凹部４８の構成と異なる。それ以外の構成は、実施形態１と同じである。以下では、実施形態１と同一の構成には同一の符号を付して、説明を省略する。 (Modification of Embodiment 1)
FIG. 3 is a diagram showing the motor 101 according to a modification of the first embodiment. A motor 101 according to this modification differs in the configuration of a recess 148 from the configuration of the recess 48 in the motor 1 of the first embodiment. Other configurations are the same as those of the first embodiment. Below, the same code|symbol is attached|subjected to the structure same as Embodiment 1, and description is abbreviate|omitted.
　モータ１０１は、ロータ２と、ステータ３と、樹脂部１０４と、ケーシング５とを備える。本変形例では、樹脂部１０４は、ステータコア径方向外側樹脂部１４１と、コイルエンド径方向外側樹脂部１４２と、コイルエンド軸方向樹脂部４３と、コイルエンド径方向内側樹脂部４４と、を有する。ステータコア径方向外側樹脂部１４１は、ステータ３のステータコア３１の径方向外側を覆う。コイルエンド径方向外側樹脂部１４２は、ステータ３のコイルエンド３３の径方向外側を覆う。 The motor 101 includes a rotor 2, a stator 3, a resin portion 104, and a casing 5. In this modification, the resin portion 104 includes a stator core radially outer resin portion 141, a coil end radially outer resin portion 142, a coil end axial resin portion 43, and a coil end radially inner resin portion 44. . The stator core radially outer resin portion 141 covers the radially outer side of the stator core 31 of the stator 3 . The coil end radially outer resin portion 142 covers the radially outer side of the coil end 33 of the stator 3 .
　樹脂部１０４は、径方向外側に、冷却部１４６を有する。本実施形態では、冷却部１４６は、ステータコア冷却部１４６ａと、コイルエンド冷却部１４６ｂと、を有する。ステータコア冷却部１４６ａは、ステータコア径方向外側樹脂部１４１の径方向外側に位置する。コイルエンド冷却部１４６ｂは、コイルエンド径方向外側樹脂部１４２の径方向外側に位置する。 The resin portion 104 has a cooling portion 146 on the radially outer side. In this embodiment, the cooling section 146 has a stator core cooling section 146a and a coil end cooling section 146b. The stator core cooling portion 146 a is positioned radially outward of the stator core radially outer resin portion 141 . The coil end cooling portion 146 b is located radially outside the coil end radially outer resin portion 142 .
　本実施形態では、冷却部１４６は、樹脂部１０４の径方向外側に、凹部１４８を有する。本実施形態では、凹部１４８は、樹脂部１０４においてステータコア３１の径方向外方に位置する第１凹部１４８ａと、樹脂部１０４においてステータ３のコイルエンド３３の
径方向外方に位置する第２凹部１４８ｂと、を有する。 In this embodiment, the cooling portion 146 has a concave portion 148 on the radially outer side of the resin portion 104 . In the present embodiment, the recessed portions 148 are composed of a first recessed portion 148 a located radially outward of the stator core 31 in the resin portion 104 and a second recessed portion located radially outward of the coil end 33 of the stator 3 in the resin portion 104 . 148b and .
　本実施形態では、第２凹部１４８ｂの深さは、第１凹部１４８ａの深さよりも大きい。すなわち、本実施形態では、冷却部１４６の第２凹部１４８ｂの底面の位置は、実施形態１のコイルエンド３３の径方向外側の凹部４８の底面の位置よりもコイルエンド３３に近い。これにより、ステータコア３１の外方に位置する凹部及びコイルエンド３３の外方に位置する凹部が同じ深さの場合に比べて、コイルエンド３３をより効率良く冷却することができる。 In this embodiment, the depth of the second recess 148b is greater than the depth of the first recess 148a. That is, in the present embodiment, the position of the bottom surface of the second recess 148b of the cooling portion 146 is closer to the coil end 33 than the position of the bottom surface of the radially outer recess 48 of the coil end 33 of the first embodiment. As a result, the coil ends 33 can be cooled more efficiently than when the recesses located outside the stator core 31 and the recesses located outside the coil ends 33 have the same depth.
　（実施形態２）
　図４は、実施形態２に係るモータ２０１を示す図である。モータ２０１は、ロータ２と、ステータ３と、樹脂部２０４と、ケーシング５と、金属部材２０６と、を備える。本実施形態では、モータ２０１は、樹脂部２０４の内部または径方向外側に金属部材２０６を備えている。それ以外の構成は、実施形態１と同じである。以下では、実施形態１と同一の構成には同一の符号を付して、説明を省略する。 (Embodiment 2)
FIG. 4 is a diagram showing the motor 201 according to the second embodiment. Motor 201 includes rotor 2 , stator 3 , resin portion 204 , casing 5 and metal member 206 . In this embodiment, the motor 201 includes a metal member 206 inside or radially outside the resin portion 204 . Other configurations are the same as those of the first embodiment. Below, the same code|symbol is attached|subjected to the structure same as Embodiment 1, and description is abbreviate|omitted.
　樹脂部２０４は、径方向外側に、冷却部４６を有する。 The resin portion 204 has a cooling portion 46 on the radially outer side.
　金属部材２０６は、金属製の部材である。本実施形態では、金属部材２０６は、モータ２０１の軸方向に延びる円筒状である。金属部材２０６は、樹脂部２０４の内部に位置する。詳細には、金属部材２０６は、ステータ３の径方向において、樹脂部２０４内におけるステータコア３１の径方向外方且つ凹部４８の底面より内方に位置し、軸方向に延びている。すなわち、金属部材２０６は、ステータ３を、径方向外方で取り囲んでいる。 The metal member 206 is a metal member. In this embodiment, the metal member 206 has a cylindrical shape extending in the axial direction of the motor 201 . Metal member 206 is positioned inside resin portion 204 . Specifically, in the radial direction of the stator 3, the metal member 206 is positioned radially outward of the stator core 31 in the resin portion 204 and inward of the bottom surface of the recess 48, and extends in the axial direction. That is, the metal member 206 surrounds the stator 3 radially outward.
　金属部材２０６は、例えば、ステータ３をモールドする工程で、樹脂部２０４の内部に埋め込むことができる。樹脂部２０４の内部に金属部材２０６が位置することで、樹脂部２０４の強度向上を図れるとともに、樹脂部２０４における熱伝達率を向上して樹脂部２０４によってステータ３をより効率良く冷却することができる。 The metal member 206 can be embedded inside the resin portion 204 in the process of molding the stator 3, for example. By positioning the metal member 206 inside the resin portion 204, the strength of the resin portion 204 can be improved, and the heat transfer rate of the resin portion 204 can be improved, so that the stator 3 can be cooled more efficiently by the resin portion 204. can.
　（その他の実施形態）
　以上、本発明の実施の形態を説明したが、上述した実施の形態は本発明を実施するための例示に過ぎない。よって、上述した実施の形態に限定されることなく、その趣旨を逸脱しない範囲内で上述した実施の形態を適宜変形して実施することが可能である。 (Other embodiments)
Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, without being limited to the above-described embodiment, it is possible to modify the above-described embodiment as appropriate without departing from the spirit thereof.
　前記各実施形態では、樹脂部４，１０４，２０４は、ステータコア径方向外側樹脂部４１，１４１と、コイルエンド径方向外側樹脂部４２，１４２と、コイルエンド軸方向樹脂部４３と、コイルエンド径方向内側樹脂部４４と、を有する。しかしながら、樹脂部は、コイルエンド径方向外側樹脂部を有さなくてもよい。樹脂部は、コイルエンド軸方向樹脂部を有さなくてもよい。樹脂部は、コイルエンド径方向内側樹脂部を有さなくてもよい。樹脂部は、少なくともステータコア３１の径方向外側の一部を覆っていればよい。 In each of the above-described embodiments, the resin portions 4, 104, 204 are composed of the stator core radial direction outer resin portions 41, 141, the coil end radial direction outer resin portions 42, 142, the coil end axial direction resin portion 43, the coil end diameter and a direction inner resin portion 44 . However, the resin portion may not have the coil end radially outer resin portion. The resin portion may not have the coil end axial resin portion. The resin portion may not have the coil end radially inner resin portion. The resin portion may cover at least a portion of the radially outer side of the stator core 31 .
　前記各実施形態では、樹脂部４，１０４，２０４のステータコア径方向外側樹脂部４１，１４１、コイルエンド径方向外側樹脂部４２，１４２、コイルエンド軸方向樹脂部４３及びコイルエンド径方向内側樹脂部４４は、一体である。しかしながら、ステータコア径方向外側樹脂部、コイルエンド径方向外側樹脂部、コイルエンド軸方向樹脂部及びコイルエンド径方向内側樹脂部は、一体でなくてもよい。 In each of the above-described embodiments, the stator core radially outer resin portions 41, 141, the coil end radially outer resin portions 42, 142, the coil end axial direction resin portion 43, and the coil end radially inner resin portions of the resin portions 4, 104, 204 44 is integral. However, the stator core radially outer resin portion, the coil end radially outer resin portion, the coil end axial resin portion, and the coil end radially inner resin portion may not be integrated.
　前記各実施形態では、冷却部４６，１４６の凹部４８，１４８は、周方向に延びる溝である。しかしながら、凹部は、周方向に延びなくてもよい。例えば、凹部は、樹脂部の径方向外側に位置する複数の穴であってもよい。例えば、樹脂部の径方向外側の面が、凹凸の形状を有していてもよい。これにより、樹脂部の径方向外側の表面積を大きくすることができる。よって、ステータの熱を効率良く冷却することができる
　前記各実施形態では、冷却部４６，１４６の凹部４８，１４８内には、冷却用の冷水が流される。しかしながら、凹部内には、冷却用のオイルなど他の液体が流されてもよい。
凹部内には、気体が流されてもよい。 In each of the embodiments described above, the recesses 48, 148 of the cooling portions 46, 146 are grooves extending in the circumferential direction. However, the recess need not extend circumferentially. For example, the recess may be a plurality of holes positioned radially outwardly of the resin portion. For example, the radially outer surface of the resin portion may have an uneven shape. Thereby, the surface area of the radially outer side of the resin portion can be increased. Therefore, the heat of the stator can be efficiently cooled. In each of the above-described embodiments, cold water for cooling is made to flow in the concave portions 48 and 148 of the cooling portions 46 and 146 . However, other liquids such as oil for cooling may be flowed into the recess.
A gas may be flowed into the recess.
　前記各実施形態では、冷却部４６，１４６における凹部４８，１４８の軸方向の間隔は均等である。また、凹部４８，１４８の開口幅は、周方向で同じ幅である。しかしながら、凹部の軸方向の間隔は均等でなくてもよい。凹部の開口幅は、周方向で同じ幅でなくてもよい。 In each of the above embodiments, the axial intervals of the recesses 48, 148 in the cooling portions 46, 146 are uniform. Also, the opening widths of the recesses 48 and 148 are the same in the circumferential direction. However, the axial spacing of the recesses may not be uniform. The opening width of the recess may not be the same width in the circumferential direction.
　前記実施形態１，２では、冷却部４６は、ステータコア径方向外側樹脂部４１の径方向外側に位置するステータコア冷却部４６ａと、コイルエンド径方向外側樹脂部４２の径方向外側に位置するコイルエンド冷却部４６ｂと、を有する。しかしながら、冷却部は、コイルエンド冷却部を有さなくてもよい。 In Embodiments 1 and 2, the cooling portion 46 includes the stator core cooling portion 46 a located radially outside the stator core radially outer resin portion 41 and the coil end cooling portion 46 a located radially outside the coil end radially outside resin portion 42 . and a cooling portion 46b. However, the cooling section may not have the coil end cooling section.
　前記各実施形態では、樹脂部４，１０４，２０４の径方向外側の全体が、ケーシング５の内面に接触している。しかしながら、樹脂部の径方向外側の一部が、ケーシングの内面に接触していてもよい。これにより、樹脂部によって径方向外側の少なくとも一部が覆われたステータコア３１を、ケーシングに対して保持することができる。 In each of the above-described embodiments, the entire radially outer side of the resin portions 4 , 104 , 204 is in contact with the inner surface of the casing 5 . However, a part of the radially outer side of the resin portion may be in contact with the inner surface of the casing. As a result, the stator core 31 having at least a portion of the radially outer side covered with the resin portion can be held with respect to the casing.
　前記実施形態２では、金属部材２０６は、モータ２０１の軸方向に延びる円筒状であり、ステータコア３１の径方向外方を取り囲んでいる。しかしながら、金属部材は、ステータコアの一部を取り囲む形状であってもよい。金属部材は、モータの軸方向に延びる複数の金属片であってもよい。 In Embodiment 2, the metal member 206 has a cylindrical shape extending in the axial direction of the motor 201 and surrounds the stator core 31 radially outward. However, the metal member may have a shape surrounding part of the stator core. The metal member may be a plurality of metal pieces extending in the axial direction of the motor.
　本発明は、モータに利用可能である。 The present invention can be used for motors.
１、１０１、２０１　モータ
２　ロータ
３　ステータ
４、１０４、２０４　樹脂部
５　ケーシング
２０　シャフト
２１　ロータコア
２２　ロータ磁石
３１　ステータコア
３２　ステータコイル
３３　コイルエンド
４１、１４１　ステータコア径方向外側樹脂部
４２、１４２　コイルエンド径方向外側樹脂部
４３　コイルエンド軸方向樹脂部
４４　コイルエンド径方向内側樹脂部
４６、１４６　冷却部
４６ａ、１４６ａ　ステータコア冷却部
４６ｂ、１４６ｂ　コイルエンド冷却部
４８、１４８　凹部
１４８ａ　第１凹部
１４８ｂ　第２凹部
２０６　金属部材 1, 101, 201 Motor 2 Rotor 3 Stator 4, 104, 204 Resin portion 5 Casing 20 Shaft 21 Rotor core 22 Rotor magnet 31 Stator core 32 Stator coil 33 Coil end 41, 141 Stator core radial outer resin portion 42, 142 Coil end radial direction Outer resin portion 43 Coil end axial direction resin portion 44 Coil end radial direction inner resin portion 46, 146 Cooling portions 46a, 146a Stator core cooling portions 46b, 146b Coil end cooling portions 48, 148 Recess 148a First recess 148b Second recess 206 Metal Element

Claims (11)

  1. 　軸線に沿って延びる円筒状のステータコア及び前記ステータコアに巻線されたステータコイルを有するステータと、
    　前記ステータコアの径方向内方に位置し、且つ、前記ステータに対して回転するロータと、
    　少なくとも前記ステータコアの径方向外側の一部を覆う樹脂部と、
    を備え、
    　前記樹脂部は、径方向外側に、前記ステータを冷却する冷却部を有する、モータ。     a stator having a cylindrical stator core extending along an axis and a stator coil wound around the stator core;
    a rotor positioned radially inward of the stator core and rotating with respect to the stator;
    a resin portion covering at least a portion of the radially outer side of the stator core;
    with
    The motor, wherein the resin portion has a cooling portion that cools the stator radially outward.
  2. 　請求項１に記載のモータにおいて、
    　前記樹脂部は、前記ステータのコイルエンドの径方向外側を覆うコイルエンド径方向外側樹脂部を有し、
    　前記冷却部は、前記コイルエンド径方向外側樹脂部の径方向外側に位置するコイルエンド冷却部を有する、モータ。     2. The motor of claim 1, wherein
    The resin portion has a coil end radially outer resin portion that covers the radially outer side of the coil end of the stator,
    The motor, wherein the cooling portion has a coil end cooling portion positioned radially outward of the coil end radially outer resin portion.
  3. 　請求項１または２に記載のモータにおいて、
    　前記冷却部は、前記樹脂部の径方向外側に、凹部を有する、モータ。     3. The motor according to claim 1 or 2,
    The motor, wherein the cooling portion has a recess radially outward of the resin portion.
  4. 　請求項３に記載のモータにおいて、
    　前記凹部は、
    　前記樹脂部において前記ステータコアの径方向外方に位置する第１凹部と、
    　前記樹脂部において前記ステータのコイルエンドの径方向外方に位置する第２凹部と、
    を有し、
    　前記第２凹部の深さは、前記第１凹部の深さよりも大きい、モータ。     4. The motor of claim 3, wherein
    The recess is
    a first recess located radially outward of the stator core in the resin portion;
    a second recess located radially outward of the coil end of the stator in the resin portion;
    has
    The motor, wherein the depth of the second recess is greater than the depth of the first recess.
  5. 　請求項３または４に記載のモータにおいて、
    　前記凹部は、周方向に延びる溝である、モータ。     5. The motor according to claim 3 or 4,
    The motor, wherein the recess is a circumferentially extending groove.
  6. 　請求項１から５のいずれか一つに記載のモータにおいて、
    　前記樹脂部は、前記ステータのコイルエンドの軸方向端部を覆うコイルエンド軸方向樹脂部を有する、モータ。     The motor according to any one of claims 1 to 5,
    The motor, wherein the resin portion has a coil end axial resin portion covering an axial end portion of a coil end of the stator.
  7. 　請求項１から６のいずれか一つに記載のモータにおいて、
    　前記樹脂部は、前記ステータのコイルエンドの径方向内側を覆うコイルエンド径方向内側樹脂部を有する、モータ。     The motor according to any one of claims 1 to 6,
    The motor, wherein the resin portion has a coil end radially inner resin portion covering a radially inner side of the coil end of the stator.
  8. 　請求項１から７のいずれか一つに記載のモータにおいて、
    　前記樹脂部の内部または径方向外側に、金属部材をさらに備える、モータ。     The motor according to any one of claims 1 to 7,
    The motor, further comprising a metal member inside or radially outside the resin portion.
  9. 　請求項１から８のいずれか一つに記載のモータにおいて、
    　前記ステータ及び前記ロータを収容するケーシングをさらに備え、
    　前記樹脂部の径方向外側の一部は、前記ケーシングの内面に接触している、モータ。     The motor according to any one of claims 1 to 8,
    further comprising a casing that houses the stator and the rotor;
    A motor, wherein a radially outer portion of the resin portion is in contact with an inner surface of the casing.
  10. 　請求項１から９のいずれか一つに記載のモータにおいて、
    　前記樹脂部は、エポキシ系の樹脂を含む、モータ。     The motor according to any one of claims 1 to 9,
    The motor, wherein the resin portion contains an epoxy-based resin.
  11. 　請求項１から１０のいずれか一つに記載のモータの製造方法であって、
    　ステータを形成するステータ形成工程と、
    　前記ステータの径方向外側の少なくとも一部を樹脂によってモールドすることにより、径方向外側に冷却部を有する樹脂部を形成する樹脂モールド工程と、
    　前記樹脂によってモールドされた前記ステータをケーシング内に収容するケーシング収容工程と、を有する、モータの製造方法。      A method for manufacturing a motor according to any one of claims 1 to 10,
    a stator forming step of forming a stator;
    a resin molding step of forming a resin portion having a cooling portion on the radially outer side by molding at least a portion of the radially outer side of the stator with a resin;
    a casing housing step of housing the stator molded with the resin in a casing.
PCT/JP2022/019743 2021-08-06 2022-05-10 Motor and method for manufacturing motor WO2023013197A1 (en)

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JP2015116113A (en) * 2013-12-16 2015-06-22 ファナック株式会社 Motor for turbo blower
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