WO2022208965A1 - 回転電機の固定子、回転電機、回転電機の固定子の製造方法および、回転電機の製造方法 - Google Patents

回転電機の固定子、回転電機、回転電機の固定子の製造方法および、回転電機の製造方法 Download PDF

Info

Publication number
WO2022208965A1
WO2022208965A1 PCT/JP2021/040516 JP2021040516W WO2022208965A1 WO 2022208965 A1 WO2022208965 A1 WO 2022208965A1 JP 2021040516 W JP2021040516 W JP 2021040516W WO 2022208965 A1 WO2022208965 A1 WO 2022208965A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
electric machine
core
peripheral surface
rotary electric
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2021/040516
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
啓生 大藤
隆之 鬼橋
勇士 八木
遼 並河
太一 徳久
智也 糸瀬
丈晴 加藤
洋樹 麻生
隆徳 渡邉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2023510203A priority Critical patent/JPWO2022208965A1/ja
Publication of WO2022208965A1 publication Critical patent/WO2022208965A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

Definitions

  • This application relates to a stator for a rotating electrical machine, a rotating electrical machine, a method for manufacturing a stator for a rotating electrical machine, and a method for manufacturing a rotating electrical machine.
  • the stator of a rotating electric machine uses a laminated iron core that has a structure in which a plurality of thin silicon steel sheets punched out by a press are laminated and integrated by caulking, welding, or the like. By winding conductors at a high density around a stator using this laminated core, it is possible to increase the efficiency, increase the capacity, and further reduce the size of the rotating electric machine.
  • Patent Document 1 it is necessary to prepare two types of laminated steel plates in order to mesh the laminated steel plates of adjacent split cores at the connecting portion, and it is necessary to perform punching and caulking for connection. There was a problem of an increase in the number of steps and a complication of the process.
  • a plurality of core pieces each having a magnetic body portion forming a yoke extending in an arc and teeth protruding from the yoke toward the axis, and coils wound around the teeth are arranged in an annular shape about the axis. and a columnar portion extending in a direction parallel to the axis provided on the yoke side of one core piece and a columnar portion provided on the yoke side of one core piece and a columnar portion extending in a direction parallel to the axis of the other core piece Snap-fit coupling with an open ring portion provided on one yoke side forms a connection portion having a fitting structure that enables rotation about the columnar portion and restricts displacement in the axial direction. is trying to solve the above problem.
  • stator core is formed into an annular shape using this structure, the strength of the snap-fit alone is not sufficient for installation in molding equipment, frame shrink fitting equipment, etc. There was a problem that the dimensional accuracy such as roundness was lowered.
  • An object of the present invention is to provide a method for manufacturing a stator for an electric machine and a method for manufacturing a rotating electric machine.
  • the stator of the rotary electric machine disclosed in the present application is A stator core in which a plurality of divided cores each composed of a yoke portion and tooth portions protruding radially inward from an inner peripheral surface of the yoke portion are arranged in an annular shape, and an armature wound around the tooth portions. a winding;
  • the split core includes an insulator that electrically insulates the split core and the armature winding, An annular fastening member that contacts the insulator and fastens all the split cores radially inward is provided.
  • stator of the rotary electric machine disclosed in the present application is A stator core in which a plurality of divided cores each including a yoke portion and tooth portions protruding inward in a radial direction X from an inner peripheral surface of the yoke portion are arranged in an annular shape, and an armature winding wound around the tooth portions.
  • the stator core includes an annular fastening member that tightens all the split cores radially inward, The fastening member is mounted in a groove circumferentially formed in the outer peripheral surface of the stator core.
  • stator of the rotary electric machine disclosed in the present application is A stator core in which a plurality of divided cores each including a yoke portion and tooth portions protruding radially inward from an inner peripheral surface of the yoke portion are arranged in an annular shape, and an armature winding wound around the tooth portions.
  • the stator core includes an annular fastening member that tightens all the split cores radially inward, The pair of fastening members are arranged in contact with both ends in the axial direction of the outer peripheral surface of the split core.
  • the rotating electric machine disclosed in the present application is a stator; and a rotor rotatably supported with its outer peripheral surface opposed to the inner peripheral surface of the stator with a gap therebetween.
  • the manufacturing method of the stator of the rotary electric machine disclosed in the present application includes: A plurality of gate portions are provided at equal intervals in the circumferential direction in the portion of the mold mold for molding the outer peripheral surface of the stator, and resin is simultaneously injected from the plurality of gate portions to mold the mold portion. be.
  • a rotor having an outer peripheral surface opposed to the inner peripheral surface of the stator manufactured by the method for manufacturing the stator with a gap therebetween is rotatable. to support.
  • the stator of a rotating electrical machine the rotating electrical machine, the method of manufacturing the stator of the rotating electrical machine, and the method of manufacturing the rotating electrical machine disclosed in the present application, the dimensional accuracy such as the inner diameter dimension, the outer diameter dimension, and the roundness of the stator core It is possible to provide a rotating electrical machine stator and a rotating electrical machine with a high
  • FIG. 1 is a perspective view of a rotating electric machine according to Embodiment 1;
  • FIG. 1 is a plan view of a rotating electric machine according to Embodiment 1;
  • FIG. 2 is a perspective view showing the configuration of the stator of the rotary electric machine according to Embodiment 1;
  • FIG. 4 is a perspective view showing another configuration of the stator of the rotary electric machine according to Embodiment 1;
  • FIG. 1 is a perspective view showing a molded stator according to Embodiment 1;
  • FIG. 1 is a cross-sectional view of a molded stator according to Embodiment 1;
  • FIG. FIG. 4 is a diagram showing a configuration of a modification of the split core according to Embodiment 1;
  • FIG. 4 is a diagram showing a snap-fit joint provided in the insulator according to Embodiment 1;
  • FIG. 8 is a perspective view showing the configuration of a stator according to Embodiment 2;
  • 10A is a cross-sectional view of a stator according to Embodiment 2.
  • FIG. 10B is an enlarged view of a main part of FIG. 10A.
  • FIG. 11 is a perspective view showing the configuration of a stator according to Embodiment 3;
  • 12A is a top view of a stator according to Embodiment 3.
  • FIG. FIG. 12B is a cross-sectional view taken along line AA of FIG. 12A.
  • 13A is a cross-sectional view of a stator according to Embodiment 3.
  • FIG. 13B is an enlarged view of a main part of FIG. 13A.
  • FIG. 11 is a perspective view showing the configuration of a stator according to Embodiment 4;
  • FIG. 11 is a cross-sectional view of a stator according to Embodiment 4;
  • 16A is a cross-sectional view of a stator according to Embodiment 4.
  • FIG. 16B is an enlarged view of a main part of FIG. 16A.
  • FIG. 11 is a perspective view showing the configuration of a stator according to Embodiment 5;
  • 18A is a cross-sectional view of a stator according to Embodiment 5.
  • FIG. FIG. 18B is an enlarged view of a main part of FIG. 18A.
  • FIG. 14 is a perspective view showing the configuration of a stator according to Embodiment 6; 20A is a cross-sectional view of a stator according to Embodiment 6.
  • FIG. FIG. 20B is an enlarged view of a main part of FIG. 20A.
  • 20C is a main part enlarged view showing another example of the tapered portion according to Embodiment 6.
  • FIG. FIG. 12 is a perspective view of a stator according to Embodiment 7;
  • FIG. 12 is a cross-sectional view of a stator according to Embodiment 7;
  • FIG. 12 is a perspective view of a stator according to Embodiment 8;
  • 24A is a cross-sectional view of a stator according to Embodiment 8.
  • FIG. 24B is an enlarged view of a main part of FIG. 24A.
  • FIG. 25A is a plan view of a stator in which a gate for injecting resin is inserted into a single mold.
  • FIG. 25B is a cross-sectional view taken along line AA of FIG. 25A.
  • FIG. 25C is a schematic diagram showing the flow of resin within the mold.
  • FIG. 26A is a plan view of a stator in which gates for injecting resin are inserted into molds at two locations.
  • FIG. 26B is a cross-sectional view taken along line AA of FIG. 26A.
  • FIG. 26C is a schematic diagram showing the flow of resin within the mold.
  • FIG. 3 is a schematic diagram showing the flow of resin in a mold with gates arranged at three locations;
  • Embodiment 1 A stator for a rotating electrical machine, a rotating electrical machine, a method for manufacturing a stator for a rotating electrical machine, and a method for manufacturing a rotating electrical machine according to Embodiment 1 will be described below with reference to the drawings.
  • the terms “axial direction”, “circumferential direction”, “radial direction”, “inner peripheral side”, “outer peripheral side”, “inner peripheral surface”, and “outer peripheral surface” refer to each , “axial direction”, “circumferential direction”, “radial direction”, “inner peripheral side”, “outer peripheral side”, “inner peripheral surface”, and “outer peripheral surface” of the stator.
  • FIG. 1 is a perspective view of a rotating electric machine 100 according to Embodiment 1.
  • FIG. FIG. 2 is a plan view of the rotating electric machine 100.
  • FIG. A rotating electrical machine 100 includes a rotor 10 and a stator 20 .
  • the rotor 10 includes a rotor core 11 , a rotating shaft 12 and permanent magnets 13 .
  • the rotor 10 is rotatably supported by a bearing (not shown) with its outer peripheral surface opposed to the inner peripheral surface of the stator 20 with an air gap 5 interposed therebetween.
  • the stator 20 includes a stator core 21 and an armature winding 22.
  • the armature winding 22 is configured by assembling a conductive wire in slots of the stator core 21 having magnetism.
  • an 8-pole 48-slot rotating electrical machine will be described, but the number of poles and slots of rotating electrical machine 100 can be increased or decreased. Either an electromagnet type or an induction machine type may be used.
  • the stator 20 has an annular shape, and the stator core 21 has steel plates laminated in the axial direction Z. Although magnetic steel sheets are used for lamination in this embodiment, the material used is not limited to magnetic steel sheets.
  • the stator 20 may be configured by using an annular integral core, by assembling split cores divided in the circumferential direction Y, or by assembling split cores in which ends in the circumferential direction Y are connected. Although it may be bent to form an annular shape, the configuration of the stator core does not matter.
  • the rotor 10 includes a rotor core 11 fixed to a rotating shaft 12 inserted at the axial position. Rotor core 11 is arranged inside stator 20 .
  • FIG. 2 shows a permanent magnet rotor with permanent magnets 13 .
  • This rotor 10 adopts an Interior Permanent Magnet type in which the permanent magnets 13 are embedded in the rotor core 11, but adopts a Surface Permanent Magnet type in which the permanent magnets 13 are arranged outside the rotor core 11.
  • an induction machine type may be used in which grooves are provided on the outer peripheral surface of the rotor 10 to accommodate conductor rods or windings.
  • FIG. 3 is a perspective view showing the configuration of stator 20 of rotating electric machine 100.
  • FIG. 4 is a perspective view showing another configuration of stator 20 of rotating electric machine 100.
  • the stator 20 of the rotary electric machine 100 has a plurality of split cores 21B each composed of a yoke portion 21BY and teeth portions 21BT protruding inward in the radial direction X from the inner peripheral surface of the yoke portion 21BY, and an insulator 4, which is an insulator, is attached to the split core 21B, or
  • the insulator 4 is integrally formed so as to cover the tooth portion 21BT, and the armature winding 22 is wound around the tooth portion 21BT with a magnet wire or the like.
  • the insulator 4 electrically insulates the split core 21 ⁇ /b>B and the armature winding 22 and also serves as a winding frame for the armature winding 22 .
  • the armature windings 22 are each manufactured by winding 1 to n times.
  • a plurality of split cores 21B wound with armature windings 22 are arranged in an annular shape and connected to form the stator 20 .
  • an elastic O-ring 7 (fastening member) made of silicon or the like is arranged on the outer peripheral surface of the stator 20 arranged in an annular shape.
  • the inner diameter dimension ⁇ of the O-ring 7 before being mounted on the stator core 21 and the outer diameter dimension ⁇ of the stator 20 have a relation of ⁇ . Due to this relationship, the O-rings 7 arranged on the outer peripheral surface of the stator core 21 clamp all the split cores 21B inward in the radial direction X. As shown in FIG. In FIG. 3, one O-ring 7 is attached to the central portion in the axial direction Z of the stator core 21 . Also, in FIG.
  • one O-ring 7 is attached to each end of the stator core 21 in the axial direction Z, and a total of two O-rings 7 are attached.
  • the O-ring 7 is in contact with the axial Z end of the outer peripheral surface of the split core 21B and the axial Z lower surface of the insulator 4 .
  • FIG. 5 is a perspective view showing the molded stator 20.
  • FIG. FIG. 6 is a cross-sectional view of the molded stator 20.
  • the stator core 21 fitted with the O-ring 7 may be molded with a mold (not shown).
  • Stator core 21 including insulator 4 and armature winding 22 , is covered with molded portion 8 made of resin. During this molding, a core rod is placed inside the stator core 21 in order to ensure the inner diameter and roundness.
  • each split core 21B By tightening each split core 21B with the O-ring 7 from the outer peripheral side to the core rod, the inner peripheral surface of each split core 21B comes into contact along the outer peripheral surface of the core rod, and the desired stator core 21 Dimensional accuracy and geometric tolerance can be obtained.
  • stator core 21 can be molded while preventing the positional deviation of the split cores 21B forming the stator core 21 when the stator core 21 is molded.
  • the O-ring 7 After the split cores 21B are arranged in an annular shape, the O-rings 7 are expanded outward in the radial direction X, arranged on the outer peripheral side of the stator core 21, then the expansion is released, and the respective split cores 21B are tightened. In the example of FIG. 3, the O-ring 7 is attached to the central portion of the stator core 21 in the axial direction Z. In the example of FIG.
  • FIG. 7 is a diagram showing the configuration of a split core 21C, which is a modification of the split core 21B.
  • a split core 21C having a structure in which a concave portion R is provided at one end portion in the circumferential direction Y of the yoke portion 21CY of the split core portion 21C and a protrusion portion P is provided at the other end portion in the circumferential direction Y, and both are combined is used. effect is obtained.
  • FIG. 8 is a diagram showing a snap-fit connection provided on the insulator 4.
  • One end of the insulator 4 in the circumferential direction Y is provided with a columnar portion 14P projecting upward in the axial direction Z.
  • the other end in the circumferential direction Y is provided with an open ring portion 14R that rotatably meshes with the columnar portion 14P.
  • the adjacent split cores 21B are rotated around the columnar part 14P by snap-fit coupling in which the columnar part 14P of one split core 21B adjacent in the circumferential direction Y is pushed into the ring-opening part 14R of the other split core 21B.
  • the split cores 21B that are adjacent to each other centering on the connecting portion are reversely warped using snap-fit coupling. That is, the inside and outside of the stator core 21 are reversed.
  • the O-ring 7 is temporarily placed in this state. After that, while maintaining the state where the O-rings 7 are arranged on the warped split cores 21B, the stator core 21 is formed in the annular shape of the product shape, and the O-rings 7 are attached to the outer peripheral surface thereof.
  • the O-ring 7 is shown here in order to hold the shape of the stator core 21 by combining the plurality of split cores 21B, other members that can restrain the plurality of split cores 21B can be used.
  • a member is also possible.
  • it is a structure in which the outer peripheral surfaces of the split cores 21B arranged in an annular shape are fixed with a binding band. After the split cores 21B are arranged in an annular shape, a binding band is arranged on the outer periphery and restrained. By restraining the binding band, the core rod is arranged inside the stator core 21 in order to ensure the inner diameter and roundness during molding.
  • each split core 21B By tightening each split core 21B inward from the outer peripheral side of the core rod with a binding band, the inner peripheral surface of each split core 21B contacts along the outer peripheral surface of the core rod, and the stator core 21 is fixed. Desired dimensional accuracy and geometric tolerance can be obtained.
  • stator core 21 can be molded while preventing the positional deviation of the split cores 21B forming the stator core 21 when the stator core 21 is molded.
  • the resin binding band (for example, made of polypropylene) may be connected and fixed by thermal welding, ultrasonic welding, or the like after being sufficiently tightened.
  • a thin ring-shaped member may be shrink-fitted on the outer periphery or tightened by a fastening member. Even in this case, a force is applied to contract the plurality of split cores 21B from the outside to the inside, so that the annular stator core 21 can be manufactured with high accuracy.
  • Embodiment 2 a stator for a rotating electrical machine, a rotating electrical machine, a method for manufacturing a stator for a rotating electrical machine, and a method for manufacturing a rotating electrical machine according to a second embodiment will be described, focusing on differences from the first embodiment.
  • the fastening member for example, the O-ring 7
  • the position of the O-ring 7 will not be arranged in the same plane perpendicular to the central axis of the stator core 21 .
  • FIG. 9 is a perspective view showing the structure of stator 220.
  • FIG. 10A is a cross-sectional view of stator 220.
  • FIG. 10B is an enlarged view of a main part of FIG. 10A.
  • Stator core 221 is configured by arranging a plurality of split cores 221B each having a yoke portion and a tooth portion in an annular shape, similar to split core 21B of the first embodiment.
  • a groove MB extending in the circumferential direction Y is provided in the central portion in the axial direction Z of the outer peripheral surface of the split core 221B.
  • Each groove MB of the plurality of split cores 221B is connected in the circumferential direction Y to form one groove M.
  • FIG. 10A is a cross-sectional view of stator 220.
  • FIG. 10B is an enlarged view of a main part of FIG. 10A.
  • Stator core 221 is configured by arranging a plurality of split cores 221B each having
  • the O-ring 7 is mounted in the groove M connected in an annular shape.
  • the position of the O-ring 7 may be changed by resin pressure or the like. can be prevented from slipping, and the dimensional accuracy of the stator 220 of the rotary electric machine can be further improved.
  • stator core 221 it is possible to manufacture the stator core 221 by uniforming the force for tightening the split cores 221B inward, so that the stator core 221 can be manufactured with high precision. Thereby, the performance of the rotary electric machine using the stator 220 can be improved.
  • the split core having a structure in which the concave portions R and the convex portions P are combined at the ends in the circumferential direction Y, as described with reference to FIG. 7 in the first embodiment. Further, the same is true when the stator core 221 is configured using the snap-fit coupling described in the first embodiment.
  • Embodiment 3 a stator for a rotating electrical machine, a rotating electrical machine, a method for manufacturing a stator for a rotating electrical machine, and a method for manufacturing a rotating electrical machine according to a third embodiment will be described, focusing on differences from the first embodiment. So far, in the first embodiment, a configuration has been described in which the fastening member (for example, the O-ring 7) is arranged on the outer peripheral surface of the stator core 21 and contracted inward to accurately manufacture the shape of the stator. However, there is a possibility that the position of the O-ring 7 will not be arranged in the same plane perpendicular to the central axis of the stator core 21 .
  • the fastening member for example, the O-ring 7
  • FIG. 11 is a perspective view showing the structure of stator 320.
  • FIG. 12A is a top view of stator 320.
  • FIG. 12B is a cross-sectional view taken along line AA of FIG. 12A. The O-ring has not yet been placed.
  • 13A is a cross-sectional view of stator 320.
  • FIG. 13B is an enlarged view of a main part of FIG. 13A.
  • the stator core used in this embodiment is the same as the stator core 21 used in the first embodiment.
  • a plurality of split cores 21B each composed of a yoke portion and a tooth portion are arranged in an annular shape.
  • An insulator 304 is attached to the end face in the axial direction Z of each split core 21B.
  • Embodiments 1 and 2 lie in the shape of insulator 304 .
  • grooves M2 extending in the circumferential direction Y are formed between the insulator 304 and the end surface 21Bs of the split core 21B in the axial direction Z when the insulator 304 is attached to the split core 21B.
  • the grooves M2 are formed at two locations, one on each side in the axial direction Z.
  • the O-ring 7 described in the first embodiment is mounted and fixed in the groove M2.
  • the position of the O-ring 7 may be changed by resin pressure or the like. can be prevented from slipping, and the dimensional accuracy of the stator 320 of the rotary electric machine can be further improved.
  • stator core 21 can be manufactured with a uniform force for tightening the split cores 21B inward, and the stator core 21 can be manufactured with high precision. Thereby, the performance of the rotary electric machine using the stator 320 can be improved.
  • the split core having a structure in which the concave portions R and the convex portions P are combined at the ends in the circumferential direction Y, as described with reference to FIG. 7 in the first embodiment. Further, the same is true when the stator core 21 is constructed using the snap-fit coupling described in the first embodiment.
  • Embodiment 4 a stator for a rotating electrical machine, a rotating electrical machine, a method for manufacturing a stator for a rotating electrical machine, and a method for manufacturing a rotating electrical machine according to a fourth embodiment will be described with a focus on differences from the first embodiment. So far, in the first embodiment, a configuration has been described in which the fastening member (for example, the O-ring 7) is arranged on the outer peripheral surface of the stator core 21 and contracted inward to accurately manufacture the shape of the stator. However, placing the O-ring on the outer peripheral surface of the stator core may increase the size of the product (stator).
  • the fastening member for example, the O-ring 7
  • FIG. 14 is a perspective view showing the configuration of stator 420. As shown in FIG. 15 is a cross-sectional view of stator 420. FIG. The O-ring 7 is not drawn.
  • FIG. 16A is a cross-sectional view of stator 320.
  • FIG. FIG. 16B is an enlarged view of a main part of FIG. 16A.
  • the stator core used in this embodiment is the same as the stator core 21 used in the first embodiment. Therefore, as in the first embodiment, a plurality of split cores 21B each composed of a yoke portion and a tooth portion are arranged in an annular shape.
  • An insulator 404 is attached to the end face in the axial direction Z of each split core 21B.
  • the insulator 404 has a protrusion 404T extending upward in the axial direction Z.
  • the protrusion 404T protrudes upward in the axial direction Z from a so-called outer flange that covers the end surface of the yoke portion of the insulator 404 in the axial direction Z.
  • an O-ring 7 for tightening the plurality of split cores 21B combined in an annular shape is arranged on the outer peripheral surface of the projection 404T of the insulator 404. As shown in FIG.
  • the O-ring 7, which is the fastening member is placed rather than the outer peripheral surface of the stator core 21.
  • the shape of the product can be miniaturized.
  • a groove extending in the circumferential direction Y for assembling an O-ring may be provided in the insulator 404 .
  • this structure for example, when the stator core 21 is resin-molded, it is possible to prevent the position of the O-ring 7 from shifting due to resin pressure or the like.
  • the force for tightening the plurality of split cores 21B inward can be produced uniformly and without variation, the dimensional accuracy of the stator 420 of the rotary electric machine can be further improved.
  • the split core having a structure in which the concave portions R and the convex portions P are combined at the ends in the circumferential direction Y, as described with reference to FIG. 7 in the first embodiment. Further, the same is true when the stator core 21 is constructed using the snap-fit coupling described in the first embodiment.
  • Embodiment 5 a stator for a rotating electrical machine, a rotating electrical machine, a method for manufacturing a stator for a rotating electrical machine, and a method for manufacturing a rotating electrical machine according to a fifth embodiment will be described, focusing on differences from the first embodiment.
  • the insulator 404 which is an insulating member, is extended in the axial direction Z, the O-ring 7 is arranged on the outer peripheral surface of the protrusion 404T of the insulator 404, and is contracted to precisely move each split core 21B.
  • the structure to be concluded has been explained.
  • the O-ring 7 which is a fastening member, is arranged on the protrusion 504T provided inside the insulator 504 in the radial direction X. As shown in FIG.
  • FIG. 17 is a perspective view showing the configuration of stator 520.
  • FIG. 18A is a cross-sectional view of stator 520.
  • FIG. FIG. 18B is an enlarged view of a main part of FIG. 18A.
  • the stator core used in this embodiment is the same as the stator core 21 used in the first embodiment. Therefore, as in the first embodiment, a plurality of split cores 21B each composed of a yoke portion and a tooth portion are arranged in an annular shape.
  • An insulator 504 is attached to the end face in the axial direction Z of each split core 21B.
  • the insulator 504 has a projection 504T extending upward in the axial direction Z from the inner side in the radial direction X.
  • the protrusion 504T protrudes upward in the axial direction Z from an inner flange of a so-called insulator 504 that covers the end surface in the axial direction Z inside the tooth portion in the radial direction X.
  • the protrusion 504T is provided with a groove M5 extending in the circumferential direction Y and recessed inward in the radial direction X.
  • an O-ring 7 for tightening the plurality of split cores 21B combined in an annular shape is mounted in the groove M5 of the projection 504T of the insulator 504. As shown in FIG.
  • the dimension in the axial direction Z of the product can be suppressed. Furthermore, since the groove M5 for arranging the O-ring 7 is provided in the projection 504T, for example, when the stator core 21 is resin-molded, the position of the O-ring 7 can be prevented from being displaced due to resin pressure or the like. In addition, since the force for tightening the plurality of split cores 21B inward can be produced uniformly and without variation, the dimensional accuracy of the stator 520 of the rotary electric machine can be further improved.
  • the split core having a structure in which the concave portions R and the convex portions P are combined at the ends in the circumferential direction Y, as described with reference to FIG. 7 in the first embodiment. Further, the same is true when the stator core 21 is constructed using the snap-fit coupling described in the first embodiment.
  • FIG. 19 is a perspective view showing the structure of stator 620.
  • FIG. 20A is a cross-sectional view of stator 620.
  • FIG. 20B is an enlarged view of a main part of FIG. 20A.
  • FIG. 20C is a main part enlarged view showing another example of the tapered portion.
  • the stator core used in this embodiment is the same as the stator core 21 used in the first embodiment. Therefore, as in the first embodiment, a plurality of split cores 21B each composed of a yoke portion and a tooth portion are arranged in an annular shape. An insulator 604 is attached to the end face in the axial direction Z of each split core 21B.
  • Embodiment 3 lies in the shape of insulator 604 .
  • a groove M6 extending in the circumferential direction Y is formed between the insulator 604 and the end surface 21Bs of the split core 21B in the axial direction Z when the insulator 604 is attached to the split core 21B.
  • the groove M6 is formed by cutting the lower surface in the axial direction Z on the outer peripheral side of the insulator 604 in a tapered shape so as to incline downward in the axial direction Z toward the inner side in the radial direction X to provide a tapered portion TP. It is formed between the insulator 604 and the split core 21B in the axial direction Z.
  • the grooves M6 extending in the circumferential direction Y are formed at two locations, one on each side in the axial direction Z, in total.
  • the O-ring 7 described in the first embodiment is mounted in the groove M6.
  • the stator core 21 is molded, etc., as in the third embodiment.
  • the O-ring 7 can be prevented from being displaced due to resin pressure or the like, and the dimensional accuracy of the stator 320 of the rotating electric machine can be further improved.
  • the width of the groove M6 in the axial direction Z may be increased and the tapered portion TP may be used as a guide for the O-ring 7.
  • the width in the axial direction Z of the entrance of the groove M6 is larger than the width in the axial direction Z of the O-ring 7 .
  • the innermost portion in the radial direction X of the groove M6 may be a plane parallel to the axial direction Z.
  • the stator core 21 can be manufactured with a uniform force for tightening the split cores 21B inward, and the stator core 21 can be manufactured with high accuracy. Thereby, the performance of the rotating electric machine using the stator 620 can also be improved.
  • the split core having a structure in which the concave portions R and the convex portions P are combined at the ends in the circumferential direction Y, as described with reference to FIG. 7 in the first embodiment. Further, the same is true when the stator core 21 is constructed using the snap-fit coupling described in the first embodiment.
  • FIG. 21 is a perspective view of a stator according to Embodiment 7.
  • FIG. 22 is a sectional view of a stator according to Embodiment 7.
  • a pair of fastening members such as O-rings are installed on the outer peripheral surface of the stator core 21 in the stator 720 of the rotary electric machine.
  • the O-ring 7 is arranged so as to contact both ends 21ZT of the outer peripheral surface of the stator 720 in the axial direction Z. As shown in FIG.
  • the reason for arranging the O-ring 7 in this way is that when the O-ring 7 is arranged in the center of the stator core 21 in the axial direction Z, no fastening force is applied to the end portion 21ZT in the axial direction Z, This is because the accuracy of the inner diameter dimension and roundness near the end portion 21ZT may deteriorate. Further, if the position of the O-ring is shifted during molding or during attachment of the O-ring, the fastening force may vary and the stator core 21 may not be fixed.
  • FIG. 23 is a perspective view of stator 820 according to the eighth embodiment.
  • 24A is a cross-sectional view of stator 820.
  • FIG. 24B is an enlarged view of a main part of FIG. 24A.
  • a tape 7T (fixing member) is attached directly above the O-ring 7 as shown in FIGS. wear. That is, the tape 7T for fixing the O-ring 7 and the split core 21B to the split core 21B across the O-ring 7 in the axial direction Z is attached from the top of the O-ring 7 so that the O-ring is attached to the stator core 21. It is possible to prevent positional deviation from both end portions 21ZT in the axial direction Z and stabilize the fastening force of the stator core 21 .
  • the stator of the rotary electric machine in each of the above-described embodiments is constructed by resin-molding an annular stator core 21 to which a fastening member such as an O-ring 7 is mounted.
  • a fastening member such as an O-ring 7
  • An example of the mold will be described below.
  • the same reference numerals as in the eighth embodiment are used as reference numerals for stators and the like, they can be applied to the stators of all the embodiments.
  • FIG. 25A is a plan view of a stator 820 in which a gate for injecting resin is inserted into the mold MK1 at one location.
  • FIG. 25B is a cross-sectional view taken along line AA of FIG. 25A.
  • FIG. 25C is a schematic diagram showing the flow of resin within the mold MK1.
  • the number of gates 800 for injecting resin is one, the resin pressure applied to the stator core 21 is not applied uniformly. Also, a reaction force that changes the direction of the resin flow is applied to the stator core 21 . For this reason, only the tightening force of the O-ring 7, which is the fastening member, applies a force greater than the tightening force toward the opposite gate 800 side.
  • the stator core 21 is deformed into a teardrop shape, and the dimensional accuracy of the stator 820 may not be maintained.
  • FIG. 26A is a plan view of a stator 820 in which two gates for injecting resin are inserted into the mold MK2.
  • FIG. 26B is a cross-sectional view taken along line AA of FIG. 26A.
  • FIG. 26C is a schematic diagram showing the flow of resin within the mold MK2.
  • the two gates 800 are arranged at positions facing each other across the central axis of the stator 820 as shown in FIG. 26B.
  • the resin is injected simultaneously from the two gates 800 arranged in this way, the deformation of the stator core 21 is eliminated by uniformly applying the resin pressure to the stator core 21 as shown in FIG. 26C. Stabilizing the inner diameter, roundness, etc. of the stator 820 makes it possible to provide the stator 820 with high precision.
  • FIG. 27 is a schematic diagram showing the flow of resin in the mold MK3 in which gates 800 are arranged at three locations. As shown in FIG. 27, even when the gates 800 are provided at three locations at equal intervals in the circumferential direction Y on the portion where the outer peripheral surface of the stator 820 is molded, the gates 800 are provided at one location. , the resin pressure can be made uniform. Further, as shown in FIG. 27, since the direction of resin flow does not change significantly, it is possible to suppress deformation of the stator core 21 after resin molding. Gate traces remain on the outer peripheral surface of the mold portion of the stator 820 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2021/040516 2021-03-29 2021-11-04 回転電機の固定子、回転電機、回転電機の固定子の製造方法および、回転電機の製造方法 Ceased WO2022208965A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023510203A JPWO2022208965A1 (https=) 2021-03-29 2021-11-04

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021054558 2021-03-29
JP2021-054558 2021-03-29

Publications (1)

Publication Number Publication Date
WO2022208965A1 true WO2022208965A1 (ja) 2022-10-06

Family

ID=83458337

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/040516 Ceased WO2022208965A1 (ja) 2021-03-29 2021-11-04 回転電機の固定子、回転電機、回転電機の固定子の製造方法および、回転電機の製造方法

Country Status (2)

Country Link
JP (1) JPWO2022208965A1 (https=)
WO (1) WO2022208965A1 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024075549A1 (ja) * 2022-10-07 2024-04-11 三菱電機株式会社 回転電機の固定子、回転電機および回転電機の固定子の製造方法
WO2024252962A1 (ja) * 2023-06-05 2024-12-12 三菱電機株式会社 インシュレータ、回転電機のステータ、回転電機、および回転電機のステータの製造方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007189786A (ja) * 2006-01-11 2007-07-26 Sumitomo Electric Ind Ltd 回転電機のステータ、そのステータの製造方法及びそのステータに用いるハウジング
JP2007195281A (ja) * 2006-01-17 2007-08-02 Sumitomo Electric Ind Ltd 回転電機用ステータコアおよびそのステータコアを用いたステータ
JP2007252088A (ja) * 2006-03-16 2007-09-27 Mitsubishi Electric Corp 回転電機および回転電機の製造方法
JP2008061319A (ja) * 2006-08-29 2008-03-13 Sumitomo Electric Ind Ltd ステータおよびステータの製造方法および内径リング
WO2015008544A1 (ja) * 2013-07-19 2015-01-22 本田技研工業株式会社 ステータ
JP2017195647A (ja) * 2016-04-18 2017-10-26 三菱電機株式会社 インシュレータ、ステータ、回転電機及びステータの製造方法
JP2019103219A (ja) * 2017-11-30 2019-06-24 三菱電機株式会社 回転電機および回転電機の製造方法
WO2019181770A1 (ja) * 2018-03-22 2019-09-26 三菱電機株式会社 回転電機の固定子
JP2020202647A (ja) * 2019-06-10 2020-12-17 三菱電機株式会社 並列巻き用のインシュレータと巻線方法
WO2021033496A1 (ja) * 2019-08-20 2021-02-25 三菱電機株式会社 ステータと回転電機、およびそれらの製造方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007189786A (ja) * 2006-01-11 2007-07-26 Sumitomo Electric Ind Ltd 回転電機のステータ、そのステータの製造方法及びそのステータに用いるハウジング
JP2007195281A (ja) * 2006-01-17 2007-08-02 Sumitomo Electric Ind Ltd 回転電機用ステータコアおよびそのステータコアを用いたステータ
JP2007252088A (ja) * 2006-03-16 2007-09-27 Mitsubishi Electric Corp 回転電機および回転電機の製造方法
JP2008061319A (ja) * 2006-08-29 2008-03-13 Sumitomo Electric Ind Ltd ステータおよびステータの製造方法および内径リング
WO2015008544A1 (ja) * 2013-07-19 2015-01-22 本田技研工業株式会社 ステータ
JP2017195647A (ja) * 2016-04-18 2017-10-26 三菱電機株式会社 インシュレータ、ステータ、回転電機及びステータの製造方法
JP2019103219A (ja) * 2017-11-30 2019-06-24 三菱電機株式会社 回転電機および回転電機の製造方法
WO2019181770A1 (ja) * 2018-03-22 2019-09-26 三菱電機株式会社 回転電機の固定子
JP2020202647A (ja) * 2019-06-10 2020-12-17 三菱電機株式会社 並列巻き用のインシュレータと巻線方法
WO2021033496A1 (ja) * 2019-08-20 2021-02-25 三菱電機株式会社 ステータと回転電機、およびそれらの製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024075549A1 (ja) * 2022-10-07 2024-04-11 三菱電機株式会社 回転電機の固定子、回転電機および回転電機の固定子の製造方法
JPWO2024075549A1 (https=) * 2022-10-07 2024-04-11
JP7814543B2 (ja) 2022-10-07 2026-02-16 三菱電機株式会社 回転電機の固定子、回転電機および回転電機の固定子の製造方法
WO2024252962A1 (ja) * 2023-06-05 2024-12-12 三菱電機株式会社 インシュレータ、回転電機のステータ、回転電機、および回転電機のステータの製造方法

Also Published As

Publication number Publication date
JPWO2022208965A1 (https=) 2022-10-06

Similar Documents

Publication Publication Date Title
CN101621221B (zh) 电动机及该电动机的制造方法
CN107005103B (zh) 旋转电机用定子铁芯、旋转电机及旋转电机的制造方法
CN107408852B (zh) 转子、旋转电机以及转子的制造方法
US10985623B2 (en) Electric motor and rotor thereof
CN108604845B (zh) 轴向间隙型旋转电机
WO2016136384A1 (ja) 電機子および回転電機
CN114223118A (zh) 定子、旋转电机及其制造方法
CN109565206B (zh) 旋转电机
JP2018068069A (ja) ステータ、モータ、およびステータの製造方法
WO2022208965A1 (ja) 回転電機の固定子、回転電機、回転電機の固定子の製造方法および、回転電機の製造方法
JP4848584B2 (ja) 永久磁石ロータ、永久磁石ロータの製造方法、モータ
JP2009077534A (ja) 回転電機の固定子及びその製造方法
JP6685434B2 (ja) 回転電機のステータおよび回転電機のステータの製造方法
JP2025168451A (ja) 固定子、回転電機、固定子の製造方法、および、回転電機の製造方法
JP7124017B2 (ja) 着磁ヨーク及びその製造方法
JP2011097756A (ja) ステッピングモータのステータヨークおよびステッピングモータ
WO2015114794A1 (ja) アキシャルギャップ型回転電機
JP2003102135A (ja) ギャップワインディングモータ
JP7517076B2 (ja) 回転電機のインシュレーターおよび回転電機
AU2020431621B2 (en) Stator, Motor, Fan, Air Conditioner, and Manufacturing Method of Stator
JP2012105543A (ja) 電動機の固定子
CN112544029B (zh) 旋转电机
JP2007037288A (ja) 永久磁石形回転電機用回転子及びその製造方法
WO2015053070A1 (ja) 回転電機のステータコア
JP7774714B2 (ja) インシュレータ、ステータ、回転電機、および、ステータの製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21935121

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2023510203

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21935121

Country of ref document: EP

Kind code of ref document: A1