WO2022239097A1 - 固定子、電動機、送風装置、固定子の製造方法および電動機の製造方法 - Google Patents

固定子、電動機、送風装置、固定子の製造方法および電動機の製造方法 Download PDF

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Publication number
WO2022239097A1
WO2022239097A1 PCT/JP2021/017811 JP2021017811W WO2022239097A1 WO 2022239097 A1 WO2022239097 A1 WO 2022239097A1 JP 2021017811 W JP2021017811 W JP 2021017811W WO 2022239097 A1 WO2022239097 A1 WO 2022239097A1
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WIPO (PCT)
Prior art keywords
insulator
tooth
stator
teeth
core back
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/JP2021/017811
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English (en)
French (fr)
Japanese (ja)
Inventor
正弥 後藤
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Mitsubishi Electric Corp
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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 PCT/JP2021/017811 priority Critical patent/WO2022239097A1/ja
Priority to JP2023520615A priority patent/JP7395061B2/ja
Publication of WO2022239097A1 publication Critical patent/WO2022239097A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Definitions

  • the present disclosure relates to a stator in which windings are wound around a stator core, an electric motor, an air blower, a method for manufacturing a stator, and a method for manufacturing an electric motor.
  • an inner rotor type electric motor in which a rotor is arranged on the inner circumference of a cylindrical stator.
  • the stator has a cylindrical core back, a plurality of teeth protruding from the inner peripheral surface of the core back and arranged in the circumferential direction of the core back, and slots formed between adjacent teeth.
  • a wire is wound around the teeth to form a coil.
  • a portion of the coil that protrudes in the central axis direction from the teeth as viewed along the direction orthogonal to the central axis of the core back is called a coil end.
  • Patent Document 1 As a method of forming a coil on a tooth, there is a method of inserting a coil formed in an annular shape in advance into the tooth. However, in such a method, since it is necessary to form the coil with a size that has a margin, there is a problem that the coil end becomes large. Therefore, in Patent Document 1, the core back and the teeth are formed separately, the windings are inserted into the slots from the slot openings of the slots, and the windings are inserted into the plurality of teeth arranged in the circumferential direction. A technique for miniaturizing the coil end by directly winding the coil and then assembling the core back and the tooth portion is disclosed.
  • the present disclosure has been made in view of the above.
  • the purpose is to obtain a stator.
  • a stator includes a cylindrical core back and a plurality of core backs arranged in the circumferential direction so as to protrude from the inner peripheral surface of the core back. a tooth portion, a plurality of insulators covering the plurality of tooth portions, respectively, and a coil formed by winding a wire around the tooth portion via the insulator.
  • a slot is formed between adjacent teeth.
  • the core back and the plurality of teeth are separated.
  • the insulator includes a first insulator covering one end portion of the tooth portion along the central axis of the core back, a second insulator covering the other end portion of the tooth portion along the central axis, and a core of the tooth portion. and a third insulator that covers a portion outside the center of the tooth portion along the radial direction of the bag. The third insulator is formed with a coil guard portion protruding into the slot.
  • FIG. 1 is an exploded perspective view of the electric motor according to Embodiment 1.
  • FIG. A perspective view of the stator core in Embodiment 1 Perspective view of core back in Embodiment 1
  • FIG. 3 is a perspective view showing a state in which a plurality of teeth are arranged radially according to Embodiment 1;
  • 4 is an exploded perspective view showing a state before the tooth portion is covered with the insulator in Embodiment 1.
  • FIG. FIG. 4 is a perspective view showing a state in which the teeth are covered with an insulator in the first embodiment;
  • FIG. 4 is a perspective view showing a state in which a plurality of tooth portions are covered with a plurality of insulators in Embodiment 1;
  • FIG. 4 is a diagram showing a state in which a plurality of tooth portions are covered with a plurality of insulators in Embodiment 1, and is a diagram viewed along the axial direction; A view of the third insulator viewed along the circumferential direction.
  • FIG. 9 is an axial view showing a state in which coils are being formed on the plurality of teeth shown in FIG. 8;
  • FIG. 9 is a view showing a state in which coils are formed on a plurality of teeth shown in FIG.
  • FIG. 4 is a cross-sectional view showing the method of manufacturing the stator, showing the first assembly step;
  • FIG. 4 is a cross-sectional view showing the method of manufacturing the stator, showing the arrangement process;
  • FIG. 4 is a cross-sectional view showing the method of manufacturing the stator, showing the winding process;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • FIG. 10 is a cross-sectional view showing the method of manufacturing the stator, showing a second assembly step;
  • stator The stator, the electric motor, the air blower, the method for manufacturing the stator, and the method for manufacturing the electric motor according to the embodiment will be described in detail below with reference to the drawings.
  • FIG. 1 is an exploded perspective view of the electric motor 1 according to the first embodiment.
  • the electric motor 1 comprises a stator 2 , a rotor 3 , a shaft portion 4 , two bearings 5 and two shells 6 and 7 .
  • a core back 9 of the stator 2, which will be described later, is formed in a cylindrical shape having a central axis C.
  • the direction parallel to the central axis C is defined as the axial direction
  • the direction perpendicular to the central axis C is defined as the radial direction
  • the direction of rotation about the central axis C is defined as the circumferential direction. do.
  • the inner circumference and the outer circumference refer to the inner circumference and the outer circumference of the cylindrical core back 9 .
  • the electric motor 1 is an inner rotor type electric motor in which a rotor 3 is arranged inside a cylindrical stator 2 .
  • the rotor 3 is provided with a shaft portion 4 extending along the central axis C of the stator 2 .
  • the shaft portion 4 is rotatably supported by two bearings 5 .
  • the bearing 5 is supported by the outer shell 6 and the outer shell 7 .
  • the outer shell 6 and the outer shell 7 form a casing that accommodates the stator 2, the rotor 3, and the bearing 5 inside.
  • the stator 2 includes a stator core 8 and coils 17 formed by winding windings 16 around the stator core 8 .
  • FIG. 2 is a perspective view of the stator core 8 according to Embodiment 1.
  • the stator core 8 has a cylindrical core back 9 and a plurality of teeth 10 protruding radially inward from the inner peripheral surface of the core back 9 and arranged radially.
  • the core back 9 and the teeth 10 are formed by laminating a plurality of electromagnetic steel sheets along the central axis C.
  • Slots 11 are formed between adjacent teeth 10 . Although the number of slots 11 is eight in this embodiment, it may be other than eight.
  • FIG. 3 is a perspective view of the core back 9 according to Embodiment 1.
  • FIG. FIG. 4 is a perspective view showing a state in which a plurality of teeth 10 are arranged radially according to the first embodiment.
  • the stator core 8 is divided into core backs 9 and tooth portions 10 .
  • the core back 9 and the teeth 10 are formed separately.
  • the inner peripheral surface of the core back 9 is formed with grooves 9a into which the radially outer ends of the tooth portions 10 are fitted.
  • FIG. 5 is an exploded perspective view showing a state before the tooth portion 10 is covered with the insulator 12 in the first embodiment.
  • FIG. 6 is a perspective view showing a state where tooth portion 10 is covered with insulator 12 in the first embodiment.
  • Insulator 12 covers tooth portion 10 to electrically insulate tooth portion 10 from coil 17 shown in FIG.
  • the insulator 12 is made of an electrically insulating material.
  • the electrically insulating material is, for example, resin.
  • insulator 12 is divided into first insulator 13 , second insulator 14 and third insulator 15 .
  • the first insulator 13 covers one end of the tooth portion 10 along the central axis C.
  • the first insulator 13 has a first covering wall 13a and a first stopper portion 13b.
  • the first covering wall 13 a is a portion that covers one axial end surface of the tooth portion 10 and both circumferential side surfaces of the tooth portion 10 .
  • the first cover wall 13 a opens radially inward and outward and opens toward the tooth portion 10 .
  • the first stopper portion 13b serves to prevent the coil 17 from protruding radially inward.
  • the first stopper portion 13b extends axially away from the tooth portion 10 from the radially inner end of the first covering wall 13a.
  • the second insulator 14 covers the other end of the tooth portion 10 along the central axis C.
  • the second insulator 14 has a second covering wall 14a and a second stopper portion 14b.
  • the second covering wall 14 a is a portion that covers the other axial end surface of the tooth portion 10 and both circumferential side surfaces of the tooth portion 10 .
  • the second covering wall 14a is open radially inwardly and outwardly and is open toward the tooth portion 10.
  • the second stopper portion 14b serves to prevent the coil 17 from protruding radially inward.
  • the second stopper portion 14b extends in the direction away from the tooth portion 10 along the axial direction from the radially inner end portion of the second covering wall 14a.
  • the third insulator 15 covers a portion of the tooth portion 10 outside the center of the tooth portion 10 along the radial direction.
  • the third insulator 15 has a third covering wall 15a and a third stopper portion 15b.
  • the third covering wall 15a is a rectangular tubular portion that covers both axial end surfaces of the tooth portion 10 and both circumferential side surfaces of the tooth portion 10 .
  • the third covering wall 15a is open radially inwardly and outwardly. That is, the third covering wall 15a is a cylindrical wall that opens radially.
  • the third stopper portion 15b serves to prevent the coil 17 from protruding radially outward.
  • the third stopper portion 15b extends axially and circumferentially.
  • a rectangular opening 15c that is longer in the axial direction than in the circumferential direction is formed in the central portion of the third stopper portion 15b in the circumferential direction.
  • the third covering wall 15a protrudes radially inward from the peripheral edge of the opening 15c.
  • FIG. 7 is a perspective view showing a state in which a plurality of tooth portions 10 are covered with a plurality of insulators 12 in Embodiment 1.
  • FIG. FIG. 8 is a diagram showing a state in which a plurality of tooth portions 10 are covered with a plurality of insulators 12 in Embodiment 1, and is a diagram viewed along the axial direction. 7 and 8, illustration of the third insulator 15 is omitted.
  • each of the multiple teeth 10 is covered with an insulator 12 .
  • One insulator 12 is provided for each tooth portion 10 . Both radial side surfaces of each tooth portion 10 are exposed without being covered with the insulator 12 .
  • the same number of first insulators 13 , second insulators 14 and third insulators 15 as the number of teeth 10 are provided.
  • the number of insulators 12 is appropriately increased or decreased according to the number of teeth 10 .
  • FIG. 9 is a view of the third insulator 15 viewed along the circumferential direction.
  • the radially inner opening edge of the third covering wall 15a of the third insulator 15 is inclined radially inward.
  • the radially inner opening edge of the third covering wall 15a is inclined so as to be positioned radially inward from one axial end to the other axial end.
  • the radial length of the third covering wall 15a increases from one axial end to the other axial end.
  • FIG. 10 is a diagram of the third insulator 15 viewed along the axial direction. As shown in FIG. 10, three types of third insulators 15 having different shapes of ends in the circumferential direction are used as the third insulators 15 . In the following description, when distinguishing between the three types of third insulators 15, they are referred to as third insulator 15A, third insulator 15B, and third insulator 15C.
  • a portion of the third stopper portion 15b of each of the third insulators 15A, 15B, 15C that protrudes into the slot 11 serves as a coil guard portion 15d that closes the slot opening of the slot 11.
  • Two coil guard portions 15d are formed in each of the third insulators 15A, 15B, 15C.
  • a curved stepped portion 15e is formed at the distal end portion in the circumferential direction of one coil guard portion 15d so as to be positioned more radially inward than the other portion, and the other coil guard portion 15d is formed at the distal end portion in the circumferential direction. are formed in a curved shape located on the same circumference.
  • a curved stepped portion 15e is formed at each circumferential tip of each of the two coil guard portions 15d so as to be positioned more radially inward than the other portions.
  • each of the two coil guard portions 15d is formed in a curved shape located on the same circumference.
  • the stepped portion 15e bends radially inward and extends in the radial direction, then bends toward the adjacent tooth portion 10 and extends in the circumferential direction.
  • a portion of the third insulator 15A and the third insulator 15B excluding the stepped portion 15e and the third insulator 15C are arranged so as to be positioned on the same circumference.
  • a coil guard portion 15 d is arranged in each slot 11 so as to protrude from each of the two third insulators 15 adjacent to the slot 11 .
  • One of the coil guard portions 15d arranged in the same slot 11 has a stepped portion 15e that is bent radially inward of the other circumferential tip portion. ing.
  • the stepped portion 15e of one of the two coil guard portions 15d and the distal end portion of the other in the circumferential direction are arranged so as to overlap in the radial direction.
  • a distal end portion of the coil guard portion 15 d in the circumferential direction is a portion located at the distal end of the third insulator 15 as a whole in the circumferential direction.
  • the circumferential tip portion of the coil guard portion 15 d may also be referred to as one end portion or the other end portion of the third insulator 15 .
  • FIG. 11 is a diagram showing a state in which the coils 17 are being formed on the plurality of tooth portions 10 shown in FIG. 8, and is a diagram viewed along the axial direction.
  • FIG. 12 is a diagram showing a state in which the coils 17 are formed on the plurality of tooth portions 10 shown in FIG. 8, viewed along the axial direction.
  • FIG. 13 is a perspective view of the stator 2 according to Embodiment 1.
  • a coil 17 is formed by winding a wire 16 around the tooth portion 10 via an insulator 12 .
  • FIG. 14 is a cross-sectional view of the stator 2 according to the first embodiment cut in a direction orthogonal to the central axis C.
  • FIG. 14 a case of manufacturing a stator 2 having eight teeth 10 shown in FIG. 14 will be described, but the number of teeth 10 is not limited.
  • the tooth portion 10A when distinguishing the eight tooth portions 10, the tooth portion 10 located at the upper side and the center of the paper surface among the tooth portions 10 in each figure is designated as the tooth portion 10A, and the tooth portions 10A and 10A are arranged in counterclockwise order. 10B, 10C, 10D, 10E, 10F, 10G, and 10H.
  • the manufacturing method of the stator 2 includes a first assembly process, an arrangement process, a winding process, a second assembly process, and a third assembly process.
  • FIG. 15 is a cross-sectional view of the tooth portion 10.
  • FIG. FIG. 16 is a cross-sectional view of the first insulator 13 and the second insulator 14.
  • FIG. 17 is a cross-sectional view showing the method of manufacturing the stator 2, showing the first assembly step. Since the cross-sectional shapes of the first insulator 13 and the second insulator 14 are the same, the reference numerals of the first insulator 13 and the second insulator 14 are also used in cross-sectional views such as FIGS. there is
  • the first assembling step is a step of assembling the first insulator 13 and the second insulator 14 to each of the plurality of tooth portions 10 . In the first assembly step, as shown in FIG. 5, the first insulator 13 and the second insulator 14 are fitted into the tooth portion 10 from both sides in the axial direction of the tooth portion 10 . By performing the first assembling step, as shown in FIG. It is covered with insulator 14 .
  • FIG. 18 is a cross-sectional view showing the manufacturing method of the stator 2, showing the arrangement process.
  • the arranging step is a step of arranging the plurality of tooth portions 10 covered with the first insulator 13 and the second insulator 14 side by side in the circumferential direction.
  • a plurality of teeth 10 are arranged radially and fixed immovably with a jig (not shown).
  • a cylindrical space for inserting the rotor 3 shown in FIG. 1 is formed in the inner periphery of the plurality of teeth 10 .
  • FIG. 19 is a cross-sectional view showing the manufacturing method of the stator 2, showing the winding process.
  • the winding step is a step of forming a coil 17 by winding the wire 16 around the tooth portion 10 via the first insulator 13 and the second insulator 14 .
  • the winding 16 is started from the radially outer side of the tooth 10 .
  • the winding method may be appropriately selected from known winding methods.
  • the winding 16 may be wound around the tooth portion 10 in a winding method as shown in FIGS. 11 and 12 .
  • Coils 17 are also arranged in slots 11 formed between adjacent teeth 10 .
  • FIG. 20 is a cross-sectional view of the third insulator 15A.
  • FIG. 21 is a cross-sectional view of the third insulator 15B.
  • FIG. 22 is a cross-sectional view of the third insulator 15C.
  • the second assembling step is a step of assembling the third insulator 15 from the radially outer side to each of the plurality of tooth portions 10 shown in FIG. 19 .
  • a portion of tooth portion 10 radially outside the center of tooth portion 10 is fitted into opening 15 c of third insulator 15 .
  • a part of the tooth portion 10 covered with the first insulator 13 and the second insulator 14 is fitted into the opening 15 c of the third insulator 15 .
  • FIG. 23 is a cross-sectional view showing the manufacturing method of the stator 2, showing the second assembly process.
  • FIG. 24 is a cross-sectional view showing the method of manufacturing the stator 2, showing the second assembly step.
  • FIG. 25 is a cross-sectional view showing the method of manufacturing the stator 2, showing the second assembling step.
  • FIG. 26 is a cross-sectional view showing the method of manufacturing the stator 2, showing the second assembling step.
  • a third insulator 15B having stepped portions 15e formed at both ends in the circumferential direction is assembled to the tooth portion 10A.
  • a third insulator 15A having a stepped portion 15e formed at one end in the circumferential direction is assembled to the adjacent tooth portion 10B positioned counterclockwise to the tooth portion 10A.
  • the other circumferential end portion of the third insulator 15A where the stepped portion 15e is not formed is radially outside the stepped portion 15e of the previously assembled third insulator 15B located counterclockwise.
  • the third insulator 15A is assembled counterclockwise in order of the tooth portion 10C, the tooth portion 10D, the tooth portion 10E, the tooth portion 10F, and the tooth portion 10G.
  • the stepped portion 15e of one adjacent third insulator 15A is located radially inside the other third insulator 15A.
  • the third insulator 15C in which the stepped portions 15e are not formed at both ends in the circumferential direction, is assembled to the tooth portion 10H.
  • one end portion in the circumferential direction of the third insulator 15C is overlapped radially outside of the stepped portion 15e of the previously assembled third insulator 15A positioned counterclockwise.
  • the other circumferential end of the third insulator 15C is overlapped radially outward of the clockwise stepped portion 15e of the previously assembled third insulator 15B.
  • FIG. 27 is a plan view of the core back 9.
  • the third assembling step is a step of assembling the core back 9 shown in FIG. 27 to each of the plurality of tooth portions 10 shown in FIG. 26 .
  • one tooth portion 10 is fitted into each of the plurality of grooves 9 a formed in the inner peripheral surface of the core back 9 .
  • a portion of the tooth portion 10 exposed from the third insulator 15 is fitted into the groove 9a.
  • the rotor 3 shown in FIG. 1 is inserted into the inner circumference of the stator 2 shown in FIG. 14, and the bearing 5 and outer shells 6 and 7 are assembled to complete the electric motor 1.
  • the core back 9 and the plurality of tooth portions 10 are separated.
  • the insulator 12 includes a first insulator 13 covering one end portion of the tooth portion 10 along the central axis C of the core back 9 and a tooth portion A second insulator 14 covering the other end portion of the tooth portion 10 along the central axis C, and a third insulator 15 covering a portion outside the center of the tooth portion 10 along the radial direction of the tooth portion 10 .
  • the third insulator 15 is formed with a coil guard portion 15 d projecting into the slot 11 .
  • the coil 17 is less likely to protrude out of the slot 11. ⁇ In particular, by assembling the third insulator 15 to the coil 17 from the outside in the radial direction after forming the coil 17, the coil 17 can be pushed back into the slot 11, so that the coil 17 can be further pushed out of the slot 11. It becomes difficult to stick out.
  • each slot 11 is provided with a coil guard portion 15d projecting from each of the two third insulators 15 adjacent to the slot 11.
  • one of the two coil guard portions 15d arranged in the same slot 11 has a stepped portion 15e bent so as to be positioned radially inside the other coil guard portion 15d. is formed.
  • the third insulator 15 has a cylindrical third covering wall 15a that opens radially.
  • the inner opening edge slopes radially inward. This makes it easier to assemble the third covering wall 15 a of the third insulator 15 to the tooth portion 10 .
  • FIG. 28 is a cross-sectional view of the stator 2A according to the second embodiment taken in a direction perpendicular to the central axis C.
  • FIG. 29 is a cross-sectional view showing the manufacturing method of the stator 2A, showing the second assembling step.
  • FIG. 30 is a sectional view showing the manufacturing method of the stator 2A, showing the second assembling step.
  • FIG. 31 is a cross-sectional view showing the manufacturing method of the stator 2A, showing the second assembling step.
  • This embodiment differs from the first embodiment described above in the ratio and arrangement of the three types of third insulators 15A, 15B, and 15C.
  • symbol is attached
  • the manufacturing method of the stator 2A includes a first assembly process, an arrangement process, a winding process, a second assembly process, and a third assembly process. Since the first assembling process, the arranging process, the winding process and the third assembling process are the same as those in the first embodiment, description thereof will be omitted and only the second assembling process will be described.
  • the third insulators 15B having stepped portions 15e formed at both ends in the circumferential direction are placed at symmetrical positions with respect to the central axis C, that is, 180 degrees apart from each other with respect to the central axis C. are assembled to the teeth 10A and 10E arranged at the positions where
  • a third insulator 15A having a stepped portion 15e formed only at one end in the circumferential direction is attached to a tooth portion 10B and a tooth portion 10C adjacent to the tooth portion 10A counterclockwise. , and to the teeth 10F and 10G adjacent to the tooth 10E in the counterclockwise direction.
  • the other circumferential end portion of the third insulator 15A where the stepped portion 15e is not formed is aligned with the counterclockwise stepped portion 15e of the previously assembled third insulator 15B. It overlaps radially outside of the portion 15e or the stepped portion 15e of the previously assembled third insulator 15A.
  • the tooth portion 10B and the tooth portion 10F are arranged at symmetrical positions with the central axis C interposed therebetween.
  • the tooth portion 10C and the tooth portion 10G are arranged at symmetrical positions with the central axis C interposed therebetween.
  • the third insulator 15C in which the stepped portions 15e are not formed at both ends in the circumferential direction, is attached to the tooth portion 10D and the tooth portion 10D arranged at symmetrical positions with respect to the central axis C. 10H, respectively.
  • one end portion in the circumferential direction of the third insulator 15C is superimposed on the radially outer side of the stepped portion 15e of the previously assembled third insulator 15A.
  • the other circumferential end of the third insulator 15C is superimposed on the radially outer side of the clockwise stepped portion 15e of the previously assembled third insulator 15B.
  • the third insulator 15 is assembled to each tooth portion 10 arranged symmetrically with respect to the central axis C, the parts of the stator 2A that are symmetrical with respect to the central axis C are The third insulator 15 can be attached to the tooth portion 10 while applying a uniform force.
  • FIG. 32 is a cross-sectional view of the stator 2B according to the third embodiment taken in a direction orthogonal to the central axis C.
  • FIG. 33 is a cross-sectional view showing the method of manufacturing the stator 2B, showing the second assembling step.
  • FIG. 34 is a cross-sectional view showing the method of manufacturing the stator 2B, showing the second assembling step.
  • This embodiment differs from the first embodiment in that two types of third insulators 15B and 15C are used.
  • symbol is attached
  • the manufacturing method of the stator 2B includes a first assembly process, an arrangement process, a winding process, a second assembly process, and a third assembly process. Since the first assembling process, the arranging process, the winding process and the third assembling process are the same as those in the first embodiment, description thereof will be omitted and only the second assembling process will be described.
  • a third insulator 15B having stepped portions 15e formed at both ends in the circumferential direction is connected to a toothed portion 10A and a toothed portion 10A which are arranged at positions separated by 90 degrees around the central axis C. 10C, tooth portion 10E and tooth portion 10G are assembled respectively.
  • a third insulator 15C having no stepped portions 15e formed at both ends in the circumferential direction is combined with the tooth portion 10B arranged at a position separated by 90 degrees around the central axis C. They are attached to the tooth portion 10D, the tooth portion 10F, and the tooth portion 10H, respectively. That is, the third insulator 15C is arranged between two adjacent third insulators 15B. At this time, both ends of the third insulator 15C in the circumferential direction are superimposed on the radially outer side of the stepped portion 15e of the adjacent third insulator 15B.
  • the stator 2 can be manufactured using only two types of third insulators 15, the third insulator 15B and the third insulator 15C.
  • the method of assembling the third insulator 15 of the present embodiment can be used when the number of teeth 10 is even.
  • FIG. 35 is a front view of blower 18 according to the fourth embodiment.
  • symbol is attached
  • the electric motor 1 may be used for the blower 18 that connects the blades 19 to the shaft portion 4 and rotates the blades 19 to blow air.
  • the electric motor 1 may be used as a ventilation fan that rotates blades or impellers to flow air.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)
PCT/JP2021/017811 2021-05-11 2021-05-11 固定子、電動機、送風装置、固定子の製造方法および電動機の製造方法 Ceased WO2022239097A1 (ja)

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JP2023520615A JP7395061B2 (ja) 2021-05-11 2021-05-11 固定子、電動機、送風装置、固定子の製造方法および電動機の製造方法

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020113518A1 (en) * 2001-02-20 2002-08-22 Chun-Pu Hsu Composite stator structure
JP2006129590A (ja) * 2004-10-28 2006-05-18 Nippon Densan Corp モータおよび電機子の製造方法
WO2014061101A1 (ja) * 2012-10-16 2014-04-24 三菱電機株式会社 回転電機の電機子
WO2016136384A1 (ja) * 2015-02-25 2016-09-01 三菱電機株式会社 電機子および回転電機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020113518A1 (en) * 2001-02-20 2002-08-22 Chun-Pu Hsu Composite stator structure
JP2006129590A (ja) * 2004-10-28 2006-05-18 Nippon Densan Corp モータおよび電機子の製造方法
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