Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/46—Fastening of windings on the stator or rotor structure
  • H02K3/52—Fastening salient pole windings or connections thereto
  • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
  • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/12—Machines characterised by the bobbins for supporting the windings

Definitions

• This disclosure relates to a stator.
• Patent Publication No. 5502115 discloses a so-called split-core type stator.
• a split-core type stator is made up of multiple stator components. The multiple stator components are integrated by assembling an upper stator component to a lower stator component from the axial direction of the stator.
• This disclosure provides a stator that can shorten the axial length compared to when crossover wires are used.
• a stator including a plurality of core components that form an annular yoke and have yoke components divided in the circumferential direction of the yoke and teeth protruding from each of the yoke components radially inward of the yoke, a plurality of windings each having a winding portion wound around each of the teeth and a jumper wire connecting the winding portions, and a plurality of insulators that are provided on each of the core components and have an insulating portion that insulates the teeth and the winding portion and a connecting portion that connects the radially inner ends of the insulating portion, the jumper wire being led out from the winding portion in a direction that loosens the winding portion, the connecting portion having a hook portion that extends in the axial direction of the connecting portion, and the jumper wire being hooked to the hook portion so that the jumper wire is wired on the inner peripheral side of the insulator relative to the hook portion.
• a stator that can shorten the axial length compared to when the crossover wires are crossed.
• FIG. 2 is a perspective view of a stator according to an embodiment of the present disclosure.
• FIG. 2 is a perspective view of a stator configuration according to an embodiment of the present disclosure.
• FIG. 2 is a plan view of a stator component according to an embodiment of the present disclosure.
• FIG. 4 is an enlarged view of a portion of FIG. 3 .
• FIG. 2 is a perspective view of an insulator according to an embodiment of the present disclosure.
• FIG. 2 is a perspective view of a portion of an insulator according to an embodiment of the present disclosure.
• FIG. 13 is a perspective view of a portion of an insulator according to a modified example.
• FIG. 2 is a plan view showing an example of a stator component.
• FIG. 8 is a plan view showing an example of a stator component 112.
• Each stator component 112 includes multiple core components 114, a winding 116, and an insulator 118.
• Each core component 114 includes a yoke component 122 that forms an annular yoke and is divided in the circumferential direction of the yoke, and a teeth portion 124 that protrudes from the yoke component 122 to the radially inward direction of the yoke.
• the winding 116 includes a winding portion 126 that is wound around each tooth portion 124, and a jumper wire 128 that connects the winding portions 126 to each other.
• the insulator 118 is provided on each core component 114, and includes an insulating portion 134 that insulates the teeth portion 124 from the winding portion 126, and a connecting portion 136 that connects the radially inner ends of the insulating portion 134 to each other.
• the winding 116 is wound around the multiple teeth 124 in sequence along the circumferential direction of the stator component 112. That is, the winding 116 is wound around teeth 124A, teeth 124B, teeth 124C, and teeth 124D in that order. This forms winding section 126A, winding section 126B, winding section 126C, and winding section 126D. Each jumper wire 128 is led out from winding section 126 in the direction in which winding section 126 tightens (the direction of arrow A).
• a jumper wire 128 is connected to the start and end terminals of winding section 126B, which is located in the middle (second) of winding sections 126A to 126D in the winding order.
• a jumper wire 128 is connected to the start and end terminals of winding section 126C, which is located in the middle (third) of winding sections 126A to 126D in the winding order.
• each jumper wire 128 is led out from the winding section 126 in the direction in which the winding section 126 is tightened, the jumper wire 128 connected to the terminal at the start of the winding of the winding section 126 located in the middle of the winding order among the multiple winding sections 126 and the jumper wire 128 connected to the terminal at the end of the winding cross at the connection portion 138 between the insulating section 134 and the connecting section 136. In this way, if the jumper wires 128 cross, the axial length of the stator formed by the multiple stator components 112 becomes longer accordingly.
• the purpose of this embodiment is to provide a stator that can shorten the axial length compared to when the crossover wires cross each other.
• the first aspect of this embodiment is a stator including a plurality of core components that form an annular yoke and have yoke components divided in the circumferential direction of the yoke and teeth protruding from each of the yoke components radially inward of the yoke, a plurality of windings that have windings wound around each of the teeth and jumper wires connecting the windings, and a plurality of insulators that are provided on each of the core components and have insulating parts that insulate the teeth and the windings and connecting parts that connect the radially inner ends of the insulating parts, the jumper wires being led out from the windings in a direction that loosens the windings, and the connecting parts having hook parts that extend in the axial direction of the connecting parts, and the jumper wires are hooked onto the hook parts so that the jumper wires are wired on the inner circumferential side of the insulators relative to the hook parts.
• the jumper wire is led out from the winding section in the direction in which the winding section loosens. Therefore, the jumper wires connected to the terminal end of the winding start of a winding section located in the middle of the multiple winding sections are wired toward different sides and do not cross, so the axial length of the stator can be made shorter than when the jumper wires cross.
• the connecting portion has a hook portion that extends in the axial direction of the connecting portion, and the jumper wire is hooked onto the hook portion so that the jumper wire is wired on the inner periphery side of the insulator relative to the hook portion. Therefore, the lead-out portion of the jumper wire led out from the terminal portion of the winding portion can be wired toward the inner periphery side of the insulator.
• the second aspect of this embodiment is a stator in which the hooking position of the jumper wire by the hooking portion is set to a position from the terminal portion of the winding portion toward the inner periphery of the insulator along the axial direction of the teeth portion in the first aspect of this embodiment.
• the hooking position of the jumper wire by the hooking portion is set to a position from the terminal portion of the winding portion toward the inner periphery of the insulator along the axial direction of the teeth portion. Therefore, a tensile force acts on the lead-out portion of the jumper wire toward the inner periphery of the insulator along the axial direction of the teeth portion, so that loosening of the winding portion can be more effectively prevented.
• the third aspect of this embodiment is the first or second aspect of this embodiment, in which the hook portion is a stator formed in a wall shape extending in the circumferential direction of the connecting portion.
• the hook portion is formed in a wall shape. Therefore, the rigidity of the hook portion can be ensured, for example, compared to when the hook portion is formed in a pin shape. This makes it possible to prevent the hook portion from collapsing even when the jumper wire is hooked on the hook portion. Furthermore, by forming the hook portion in a wall shape, the hook portion acts as a rib, thereby increasing the rigidity of the connection portion.
• FIG. 1 is a perspective view of a stator 10 according to this embodiment.
• the stator 10 is a so-called split-core type stator.
• the basic configuration of a split-core type stator is described in Japanese Patent No. 5502115.
• the stator 10 is applied to an inner rotor type brushless motor. That is, a rotor (not shown) is rotatably housed inside the stator 10, and the stator 10 and the rotor form a brushless motor.
• the stator 10 is composed of multiple stator components 12.
• the stator 10 has U-phase, V-phase, and W-phase, and the number of multiple stator components 12 corresponds to the number of U-phase, V-phase, and W-phase. That is, the stator 10 includes a U-phase stator component 12, a V-phase stator component 12, and a W-phase stator component 12.
• the multiple stator components 12 are integrated by being assembled together in the axial direction of the stator 10.
• FIG. 2 is a perspective view of the stator component 12 according to this embodiment.
• FIG. 3 is a plan view of the stator component 12 according to this embodiment, and
• FIG. 4 is an enlarged view of a portion of FIG. 3.
• the stator component 12 includes a plurality of core components 14, windings 16, and insulators 18.
• Each core component 14 forms an annular yoke 20 (see FIG. 1) and has yoke components 22 divided in the circumferential direction of the yoke 20, and teeth 24 protruding from the yoke components 22 to the radially inward direction of the yoke 20.
• the winding 16 has windings 26 wound around each tooth 24, jumper wires 28 connecting the windings 26, a winding terminal 30 at the start of the winding, and a winding terminal 32 at the end of the winding.
• the insulators 18 are provided on each core component 14 and have insulating parts 34 that insulate the teeth 24 and winding parts 26, and connecting parts 36 that connect the radially inner ends of the insulating parts 34 to each other.
• the winding 16 is wound around the multiple teeth 24 in sequence along the circumferential direction of the stator component 112. That is, the winding 16 is wound around teeth 24A, teeth 24B, teeth 24C, and teeth 24D in that order. This forms winding section 26A, winding section 26B, winding section 26, and winding section 26D.
• Each jumper wire 28 is led out from winding section 26 in the direction in which winding section 26 loosens (the direction of arrow B shown in Figure 4).
• Transfer wires 28 are connected to the start and end terminals of winding portion 26B, which is located in the middle (second) of winding portions 26A to 26D in the winding order.
• the jumper wires 28 connected to the start and end terminals are wired from winding portion 26B to different sides (in the direction of arrow B) without crossing at connection portion 38 between insulating portion 34 and connecting portion 36 corresponding to winding portion 26B.
• jumper wires 28 are connected to the start and end terminals of winding portion 26C, which is located in the middle (third) of winding portions 26A to 26D in the winding order.
• the jumper wire 28 connected to the terminal at the beginning of the winding and the jumper wire 28 connected to the terminal at the end of the winding are wired from the winding part 26C to different sides (in the direction of arrow B) without crossing at the connection part 38 between the insulating part 34 and the connecting part 36 corresponding to the winding part 26C.
• FIG. 5 is a perspective view of the insulator 18 according to this embodiment.
• the connecting portion 36 is formed in the shape of an annular plate with the axial direction of the connecting portion 36 as the plate thickness direction.
• the connecting portion 36 is formed with a plurality of hook portions 42.
• the hook portions 42 are formed at intervals in the circumferential direction of the connecting portion 36.
• Each hook portion 42 is formed in the shape of a wall extending from one axial side surface of the connecting portion 36 to one axial side of the connecting portion 36.
• Each hook portion 42 is formed on the outer peripheral portion of the one axial side surface of the connecting portion 36, and extends in an arc shape along the outer periphery of the connecting portion 36.
• Each hook portion 42 is located between adjacent insulating portions 34. In other words, the hook portions 42 have notches 44 at positions corresponding to the insulating portions 34.
• the jumper wire 28 is hooked onto the hook portion 42 so that the jumper wire 28 is wired on the inner circumferential side of the insulator 18 relative to the hook portion 42. If the circumferential direction of the connecting portion 36 is the extension direction of the hook portion 42, the jumper wire 28 is specifically hooked onto the end portion 42A (i.e., the end portion of the notch 44) of the hook portion 42 in the extension direction.
• the end 42A of the hook portion 42 corresponds to the hook position P of the jumper wire 28 by the hook portion 42.
• the hook position P of the jumper wire 28 by the hook portion 42 is set at a position closer to the inner circumference of the insulator 18 than the terminal portion 27 of the winding portion 26. More specifically, the hook position P is set at a position from the terminal portion 27 of the winding portion 26 toward the inner circumference of the insulator 18 along the axial direction of the teeth portion 24.
• the lead-out portion 29A of the jumper wire 28 led out from the terminal portion 27 of the winding portion 26 extends linearly toward the inner periphery of the insulator 18 along the axial direction of the teeth portion 24.
• the middle portion 29B of the jumper wire 28 located between the ends 42A on both sides of the hook portion 42 extends linearly connecting the ends 42A on both sides of the hook portion 42.
• a tapered portion 46 is formed at the end 42A of the hook portion 42.
• the tapered portion 46 is formed at the upper end of the hook portion 42 in the height direction.
• the shape of the tapered portion 46 may be a chamfered shape or an R shape.
• a return portion 48 is formed at the end 42A of the hook portion 42. The return portion 48 protrudes from the upper end of the hook portion 42 in the height direction to the inside of the notch 44.
• FIG. 6 is a perspective view of a portion of the insulator 18 according to this embodiment.
• a padding section 50 is formed at the connection section with the connecting section 36 in the insulating section 34 that corresponds to the above-mentioned winding section 26B.
• the padding section 50 is formed in a shape that pads the connection section (corner section) with the connecting section 36 in the insulating section 34.
• the jumper wires 28 are led out from the winding section 26 in the direction in which the winding section 26 loosens. Therefore, the jumper wires 28 connected to the terminals at the start and end of the winding section 26 located in the middle of the multiple winding sections 26 are wired toward different sides and do not cross, so the axial length of the stator 10 formed by the multiple stator components 12 can be made shorter than in the case where the jumper wires 28 cross.
• the connecting portion 36 has a hook portion 42 that extends in the axial direction of the connecting portion 36, and the jumper wire 28 is hooked onto the hook portion 42 so that the jumper wire 28 is wired on the inner periphery side of the insulator 18 relative to the hook portion 42. Therefore, the lead-out portion 29A of the jumper wire 28 led out from the terminal portion 27 of the winding portion 26 can be wired toward the inner periphery side of the insulator 18.
• a tensile force acts on the lead-out portion 29A of the jumper wire 28 toward the inner periphery side of the insulator 18, so that even if the jumper wire 28 is led out from the winding portion 26 in a direction that loosens the winding portion 26, the winding portion 26 can be prevented from loosening.
• the length of the windings 16 can be made shorter, for example, compared to when the jumper wires 28 cross. This allows the resistance of the windings 16 to be reduced, and electrical losses (current losses) due to the windings 16 can be suppressed.
• the hooking position P of the jumper wire 28 by the hooking portion 42 is set at a position from the terminal portion 27 of the winding portion 26 toward the inner periphery of the insulator 18 along the axial direction of the teeth portion 24. Therefore, a tensile force acts on the derived portion 29A of the jumper wire 28 toward the inner periphery of the insulator 18 along the axial direction of the teeth portion 24, so that the winding portion 26 can be more effectively prevented from loosening.
• the hook portion 42 is formed in a wall shape. Therefore, the rigidity of the hook portion 42 can be ensured, for example, compared to when the hook portion 42 is formed in a pin shape. This makes it possible to prevent the hook portion 42 from collapsing even when the jumper wire 28 is hooked on the hook portion 42. Furthermore, by forming the hook portion 42 in a wall shape, the hook portion 42 acts as a rib, thereby increasing the rigidity of the connecting portion 36.
• a tapered portion 46 is formed at the upper end portion in the height direction of the hook portion 42 at the end portion 42A in the extension direction of the hook portion 42. This improves the workability when hooking the jumper wire 28 to the end portion 42A from above in the height direction of the hook portion 42.
• a return portion 48 is formed on the end 42A of the hook portion 42. Therefore, it is possible to prevent the jumper wire 28 hooked on the end 42A of the hook portion 42 from falling off the hook portion 42.
• the insulating part 34 corresponding to the above-mentioned winding part 26B has a padding part 50 formed at the connection part with the connecting part 36. Therefore, by connecting the jumper wire 28 to the terminal part at the start of winding and the terminal part at the end of winding of the winding part 26, it is possible to suppress the collapse deformation of the insulating part 34 even if the load acting on the insulating part 34 is larger than that of the other insulating parts 34.
• FIG. 7 is a perspective view of a portion of the insulator 18 according to a modified example.
• the padding portion 50 is formed in a rib shape. Even with this configuration, it is possible to suppress the insulating portion 34 from collapsing and deforming.
• the padding 50 may be formed at the connection between the insulating portion 34 corresponding to the winding portion 26C and the connecting portion 36. In addition, in the above embodiment, the padding 50 may be formed at the connection between all insulating portions 34 and the connecting portion 36.
• the hooking position P of the jumper wire 28 by the hooking portion 42 may be a position other than that shown in FIG. 4, as long as it is a position closer to the inner circumference of the insulator 18 than the terminal portion 27 of the winding portion 26. In other words, the hooking position P may be shifted in the circumferential direction of the connecting portion 36 from the position shown in FIG. 4.
• the hook portions 42 are formed in a wall shape, but they may be formed in a shape other than a wall.
• the hook portions 42 may be formed in the connecting portions 36 at positions corresponding to the hook positions P.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=92590182

Family Applications (1)

Country Status (5)

Citations (3)

• 2023
  • 2023-03-02 JP JP2023032109A patent/JP2024124141A/ja active Pending
  • 2023-12-26 WO PCT/JP2023/046775 patent/WO2024180892A1/ja not_active Ceased
  • 2023-12-26 CN CN202380095210.0A patent/CN120814156A/zh active Pending
  • 2023-12-26 DE DE112023005899.7T patent/DE112023005899T5/de active Pending
• 2025
  • 2025-09-02 US US19/316,365 patent/US20260005572A1/en active Pending

Patent Citations (3)

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