[go: up one dir, main page]

WO2019189478A1 - Stator et moteur - Google Patents

Stator et moteur Download PDF

Info

Publication number
WO2019189478A1
WO2019189478A1 PCT/JP2019/013383 JP2019013383W WO2019189478A1 WO 2019189478 A1 WO2019189478 A1 WO 2019189478A1 JP 2019013383 W JP2019013383 W JP 2019013383W WO 2019189478 A1 WO2019189478 A1 WO 2019189478A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil wire
teeth
coil
tooth
stator
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/JP2019/013383
Other languages
English (en)
Japanese (ja)
Inventor
宏徳 連記
慧 中村
省悟 新村
遼平 大脇
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.)
Nidec Corp
Original Assignee
Nidec 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 Nidec Corp filed Critical Nidec Corp
Publication of WO2019189478A1 publication Critical patent/WO2019189478A1/fr
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
    • H02K1/14—Stator cores with salient poles
    • 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
    • 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
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • 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
    • H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines

Definitions

  • the present invention relates to a stator and a motor.
  • JP2015-167457A Japanese publication: JP2015-167457A
  • an object of the present invention is to provide a stator and a motor that can easily and stably fix a coil wire to a tooth without using a special mechanism or member.
  • stator core having an annular core back extending in the circumferential direction around an axis extending in one direction, and a plurality of teeth extending radially from the core back.
  • a plurality of coil wires, and the tooth has a bulging portion that is thicker than the tip of the tooth in a direction perpendicular to the central axis of the tooth on the base side of the tip of the tooth in the radial direction. At least a part of the coil wire is provided in the bulging portion.
  • One aspect of the motor of the present invention includes the stator described above and a rotor.
  • a stator and a motor that can easily and stably fix a coil wire to a tooth without using a special mechanism or member.
  • FIG. 1 is a cross-sectional view of the motor of the embodiment, and is a view showing a cross-section of the motor along the axial direction.
  • FIG. 2 is a perspective view of the motor according to the embodiment.
  • FIG. 3 is a plan view of the stator.
  • FIG. 4 a is a plan view of the coil group.
  • FIG. 4 b is a front view of the coil group.
  • FIG. 5 is a plan view of the stator core.
  • FIG. 6 is a plan view of a jig used for attaching the coil wire.
  • FIG. 7 is an explanatory diagram of attachment of the coil wire to the stator core.
  • FIG. 8 is a plan view of a jig used for resin filling.
  • FIG. 9 is a diagram illustrating a main part of the stator.
  • FIG. 10 is a plan view of a stator core according to a modification.
  • the Z axis is shown as appropriate.
  • the Z-axis direction in each figure is a direction parallel to the axial direction of the central axis J shown in FIG.
  • the positive side (+ Z side, one side) in the Z-axis direction is referred to as “upper side”
  • the negative side ( ⁇ Z side, the other side) in the Z-axis direction is referred to as “lower side”.
  • the upper side and the lower side are directions used for explanation only, and do not limit the actual positional relationship and direction.
  • a direction parallel to the central axis J (Z-axis direction) is simply referred to as an “axial direction”, and a radial direction around the central axis J is simply referred to as a “radial direction”.
  • the circumferential direction centering around, that is, the circumference of the central axis J is simply referred to as “circumferential direction”.
  • plane view means a state viewed from the axial direction.
  • FIG. 1 is a cross-sectional view of the motor of this embodiment.
  • FIG. 1 is a view showing a cross section of the motor along the axial direction.
  • the motor 100 of the present embodiment includes a motor case 2, a rotor 10 that rotates about a central axis J that extends in the vertical direction, and a stator 20 that faces the rotor 10 with a gap in the radial direction. And a pair of bearings 30, a circuit board 40, and a mold resin 50 made of resin. *
  • FIG. 2 is a perspective view of the motor of this embodiment.
  • the motor case 2 accommodates each member constituting the motor 100.
  • the motor case 2 includes a bottomed cylindrical housing 3 having a bottom on the lower side in the axial direction, and a lid 4 that covers the upper side in the axial direction of the housing 3.
  • the housing 3 includes a disk-shaped bottom plate portion 3a and a cylindrical peripheral wall portion 3b extending in the axial direction from the outer peripheral edge of the bottom plate portion 3a.
  • the bottom plate portion 3 a has a bearing holding portion 3 c that holds one of the pair of bearings 30.
  • the housing 3 has a notch 6 provided at the tip of the peripheral wall 3b and forming an opening in the radial direction. *
  • the lid 4 is formed along a disc-shaped disc portion 4a, a cylindrical bearing holding portion 4b provided on the lower ( ⁇ Z side) surface of the disc portion 4a, and an outer peripheral edge portion of the disc portion 4a. And a peripheral wall portion 4c protruding downward.
  • the lid 4 and the housing 3 are fitted together. Specifically, the radially outer peripheral surface of the peripheral wall portion 4 c of the lid 4 and the radially inner peripheral surface of the peripheral wall portion 3 b of the housing 3 are in contact with each other.
  • the lid 4 and the housing 3 are fixed by caulking each other.
  • the notch 6 forms an opening 7 in the motor case 2 that allows the inside of the case and the outside of the case to communicate with each other by fitting the lid 4 and the housing 3 together.
  • the rotor 10 includes a shaft 11, a rotor core 12, and a plurality of rotor magnets 13.
  • the shaft 11 extends in one direction around a central axis J that extends in the vertical direction (Z-axis direction). The upper end and the lower end of the shaft 11 are supported by the bearings 30 so as to be rotatable around the central axis J.
  • the rotor core 12 is fixed to the shaft 11.
  • the rotor core 12 surrounds the shaft 11 in the circumferential direction.
  • a plurality (six in this embodiment) of rotor magnets 13 are fixed to the radially outer surface of the rotor core 12.
  • the plurality of rotor magnets 13 have N poles and S poles alternately arranged in the circumferential direction.
  • the rotor core 12 and the rotor magnet 13 rotate together with the shaft 11. *
  • the circuit board 40 is electrically connected to the lead wire drawn from the coil of the stator 20.
  • the circuit board 40 is provided below the lid 4. That is, the circuit board 40 is provided inside the motor case 2.
  • the circuit board 40 controls the rotation of the rotor 10 by passing a current through the coil.
  • An integrated circuit and a capacitor (not shown) are mounted on the circuit board 40. In the present embodiment, a part of the circuit board 40 is pulled out of the motor case 2 through the opening 7. *
  • the motor 100 includes a rotation detection sensor 41 fixed to the lower surface of the circuit board 40.
  • the rotation detection sensor 41 is located between the mold resin 50 and the circuit board 40 in the axial direction.
  • the rotation detection sensor 41 is a magnetic sensor.
  • the rotation detection sensor 41 has a configuration in which, for example, a Hall element, an MR (Magneto-Resistive) element, and a magnet are combined.
  • the rotation detection sensor 41 detects the position of the rotor 10 by detecting the magnetic field of the rotor magnet 13 in the rotor 10. *
  • the mold resin 50 is provided in the housing 3 so as to cover the stator 20 as shown in FIG. More specifically, the mold resin 50 is provided at least between the coil wire 32 and the stator core 21. Thereby, the coil wire 32 and the stator core 21 are firmly fixed. Thereby, dropping of the coil wire 32 from the stator core 21 is prevented.
  • the mold resin 50 is provided between the stator 20 and the inner peripheral surface of the motor case 2. Thereby, the stator 20 is firmly fixed to the motor case 2. *
  • the mold resin 50 is provided on the lid 4 side with respect to the coil wire 32 and on the coil wire 32 side with respect to the notch 6 in the axial direction. Therefore, the mold resin 50 is disposed in the motor case 2 without being exposed to the outside from the opening 7.
  • the mold resin 50 is positioned below the rotation detection sensor 41 fixed to the lower surface of the circuit board 40. That is, the mold resin 50 and the rotation detection sensor 41 do not contact each other. Further, the mold resin 50 is located below the lid 4. Specifically, the mold resin 50 is located on the lower side of the bearing holding portion 4 b located on the lowermost side of the lid 4. With this configuration, since the mold resin 50 and the rotation detection sensor 41 do not contact each other, the housing 3 and the lid 4 can be attached favorably. For example, when attaching the lid 4 to which the rotation detection sensor 41 is attached to the housing 3, it is possible to prevent a problem that the lid 4 cannot be attached to the housing 3 because the mold resin 50 is sandwiched between the circuit board 40 and the opening 7. it can. *
  • the mold resin 50 is not provided in the opening 7.
  • the housing 3 and the lid 4 can be attached favorably.
  • the lid 4 to which the circuit board 40 is attached is attached to the housing 3, it is possible to prevent a problem that the lid 4 cannot be attached to the housing 3 because the mold resin 50 is sandwiched between the circuit board 40 and the opening 7. .
  • the circuit board 40 is not displaced due to the contact with the mold resin 50. Therefore, it is possible to prevent positional deviation between the rotation detection sensor 41 provided on the circuit board 40 and the rotor 10. Therefore, it is possible to prevent the rotation detection accuracy of the rotor 10 from being lowered due to the positional deviation of the circuit board 40.
  • the mold resin 50 since the mold resin 50 does not contact the lid 4, a gap is generated between the mold resin 50 and the lid 4. As a result, a structure in which vibration is not easily transmitted from the stator 20 to the lid 4 is obtained. Therefore, vibration and noise during driving of the motor 100 can be reduced. Further, in the motor 100 according to the present embodiment, since the amount of resin used for the mold resin 50 is smaller than the structure in which the mold resin 50 is disposed between the stator 20 and the lid 4, the amount of the resin is reduced. Reduced weight. *
  • the stator 20 surrounds the outer side of the rotor 10 in the radial direction.
  • FIG. 3 is a plan view of the stator. As shown in FIG. 3, the stator 20 is annularly arranged around the central axis J.
  • the motor 100 of this embodiment is an inner rotor type motor.
  • the stator 20 includes a stator core 21, a plurality of coil groups 31 attached to the stator core 21, a groove 25, and a protruding portion 28.
  • the stator 20 of the present embodiment includes three coil groups 31. *
  • the stator core 21 is a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the vertical direction.
  • the entire surface of the stator core 21 is painted with an insulating coating film having insulating properties. Thereby, the stator core 21 has insulation on the surface.
  • the stator core 21 has an annular core back 21a and a plurality of teeth 21b.
  • the teeth 21b extend radially inward from the inner peripheral surface 21a1 of the core back 21a.
  • the teeth 21b are arranged at equal intervals in the circumferential direction.
  • the teeth 21b face the rotor 10 in the radial direction.
  • FIG. 5 is a plan view of the stator core.
  • the teeth 21b of the present embodiment extend along the central axis T1 along the radial direction in a plan view.
  • the teeth 21b include a pair of teeth outer surfaces 21c positioned in the circumferential direction, tip portions 21d that connect the radially inner ends of the pair of teeth outer surfaces 21c, and a bulging portion 17.
  • the pair of teeth outer surfaces 21c are parallel to each other. That is, the distance between the pair of teeth outer surfaces 21c is constant. Further, a recess 21d1 that is recessed radially outward is provided at the tip 21d of the tooth 21b. *
  • the bulging part 17 is provided in the base 21A side rather than the front-end
  • the bulging portion 17 is thicker than the tip 21B of the tooth 21b in a direction orthogonal to the central axis T1 of the tooth 21b.
  • the cross-sectional area of the tooth 21b due to the surface orthogonal to the central axis T1 of the tooth 21b increases at the bulging portion 17. Therefore, the tooth 21 b of the present embodiment has a shape in which the base 21 ⁇ / b> A and the tip 21 ⁇ / b> B are constricted with respect to the bulging portion 17.
  • the thickness of the bulging portion 17 is set to a size that allows at least the coil wire 32 to be inserted into the tooth 21b.
  • the bulging portion 17 bulges in the circumferential direction.
  • the circumferential direction includes a direction orthogonal to the central axis T1 of the teeth 21b when viewed from the axial direction.
  • the stator core 21 is composed of a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the vertical direction (axial direction). Therefore, by setting the bulging direction of the bulging portion 17 to the circumferential direction, the stator core 21 having the bulging portion 17 can be easily manufactured by stacking electromagnetic steel plates having the same shape. Note that the bulging direction of the bulging portion may be the axial direction. *
  • the bulging part 17 of this embodiment has the 1st inclined surface 17a and the 2nd inclined surface 17b seeing in the axial direction.
  • the first inclined surface 17a is connected to the tooth outer surface 21c of the tooth 21b on the radially inner side.
  • the first inclined surface 17a extends obliquely away from the central axis T1 of the tooth 21b as it goes radially outward, and is connected to the second inclined surface 17b.
  • the second inclined surface 17b is connected to the tooth outer surface 21c of the tooth 21b on the radially outer side than the first inclined surface 17a.
  • the second inclined surface 17b extends obliquely away from the central axis T1 of the tooth 21b as it goes radially inward, and is connected to the first inclined surface 17a.
  • the bulging portion 17 of the present embodiment has a substantially triangular shape that is convex in the circumferential direction when viewed in the axial direction.
  • the bulging portion 17 and the tooth outer surface 21c of the tooth 21b are smoothly connected. That is, the bulging portion 17 and the outer peripheral surface of the tooth 21b are smoothly connected. Specifically, the first inclined surface 17a and the second inclined surface 17b and the teeth outer surface 21c are smoothly connected. Thereby, when inserting the coil wire 32 in the teeth 21b, the inner surface of the coil wire 32 can smoothly run on the bulging portion 17 from the teeth outer surface 21c of the teeth 21b. Therefore, the insertion work of the coil wire 32 with respect to the teeth 21b can be performed easily. *
  • FIG. 9 is a view showing a main part of the stator, and is a cross-sectional view of one tooth to which a coil wire is attached. As shown in FIG. 9, the coil wire 32 is inserted along the radial direction of the tooth 21 b, and at least a part of the coil wire 32 is provided in the bulging portion 17. *
  • a surface perpendicular to the central axis T1 of the tooth 21b and at a position different from the bulging portion 17 in the radial direction is defined as a first surface M1, orthogonal to the central axis T1 of the tooth 21b, and the bulging portion 17 in the radial direction.
  • a surface that overlaps with the second surface M2 is defined as a second surface M2.
  • the cross-sectional area S1 by the 1st surface M1 of the inner surface of the coil wire 32 provided in the teeth 21b is smaller than the cross-sectional area S2 by the 2nd surface M2.
  • the inner surface of the coil wire 32 is a surface facing the teeth outer surface 21c. In the present embodiment, the inner surface of the coil wire 32 is in contact with the teeth outer surface 21c.
  • the coil wire 32 attached to the tooth 21b has the inner surface of the coil wire 32 pushed outward at a position overlapping the bulging portion 17 (on the second surface M2) and the bulging portion 17.
  • the surface on the inner side of the coil wire 32 is in contact with the outer peripheral surface (tooth outer surface 21c) of the tooth 21b at a different position (on the first surface M1). More specifically, the inner surface of the coil wire 32 contacts the tooth outer surface 21c of the tooth 21b at a position different from the bulging portion 17 (on the first surface M1).
  • the coil wire 32 of this embodiment is press-fitted into the teeth 21b. Therefore, the teeth 21 b apply a force to the coil wire 32. Thereby, the coil wire 32 is attached to the tooth 21b in a state in which the coil wire 32 is prevented from being detached by the bulging portion 17. Therefore, even during the assembly of the stator 20, it is possible to prevent the coil wire 32 from being detached from the tooth 21 b and the positional deviation between the coil wire 32 and the tooth 21 b.
  • FIG. 4a is a plan view of the coil group
  • FIG. 4b is a front view of the coil group.
  • 4A and 4B the coil group 31 removed from the stator core 21 is illustrated.
  • the coil group 31 is formed by winding a single conducting wire 34, and has a winding start portion 35 of the conducting wire 34 and a winding end portion 36 of the conducting wire 34.
  • the coil group 31 includes two or more coil wires 32 connected to each other by a jumper wire 33 between the winding start portion 35 and the winding end portion 36.
  • the coil group 31 of this embodiment has three coil wires 32. That is, the coil group 31 of the present embodiment connects the three coil wires 32 by the two crossover wires 33.
  • the crossover wire 33 extends linearly. More specifically, the connecting wire 33 extends linearly from the one axial direction side of one coil wire 32 toward the other axial direction side of the other coil wire 32 in the adjacent coil wires 32.
  • the one axial side of the coil wire 32 corresponds to the radially inner side of the coil wire 32 attached to the tooth 21b shown in FIG.
  • the axial direction other side of the coil wire 32 is equivalent to the radial direction outer side of the coil wire 32 attached to the teeth 21b shown in FIG.
  • the axis C1 of the coil wire 32 is an axis passing through the center of each coil wire 32 as shown in FIGS. 4a and 4b. That is, the coil wire 32 is configured by winding the conducting wire 34 around the axis C1.
  • the stator core 21 of the present embodiment has nine teeth 21b.
  • a slot 23 for accommodating the coil wire 32 is provided between the teeth 21b.
  • the motor 100 of this embodiment is a motor configured with 6 poles and 9 slots. Note that the number of poles and the number of slots of the motor are not limited to the present embodiment, and are appropriately selected according to the required output and the winding method. *
  • the motor 100 of the present embodiment is a so-called three-phase motor in which currents of three different phases of U phase, V phase, and W phase flow.
  • the three coil groups 31 may be referred to as a first coil group 31U, a second coil group 31V, and a third coil group 31W, respectively.
  • the first coil group 31U is a coil group corresponding to the U phase
  • the second coil group 31V is a coil group corresponding to the V phase
  • the third coil group 31W is a coil group corresponding to the W phase. That is, the phases of currents flowing through the first coil group 31U, the second coil group 31V, and the third coil group 31W are different from each other.
  • the three coil wires in the first coil group 31U each function as a U-phase coil
  • the three coil wires in the second coil group 31V each function as a V-phase coil
  • the three coil wires in the third coil group 31W are W Each functions as a phase coil.
  • the first coil group 31U is formed by winding a single conducting wire 34U, and has three U-phase coil wires 32U connected by two connecting wires 33U.
  • the winding start portion 35U of the conducting wire 34U in the first coil group 31U is drawn upward.
  • the winding end portion 36U of the first coil group 31U is drawn radially outward from the side end face of the U-phase coil wire 32U when viewed in the axial direction.
  • the first coil group 31U is formed by winding the conducting wire 34U, the winding start portion 35U of the conducting wire 34U is drawn out to the other side in the axial direction of the U-phase coil wire 32U, whereby the other side in the axial direction of the U-phase coil wire 32U. Protrusively.
  • the second U-phase coil wire 32U (corresponding to the middle coil wire in FIGS. 4a and 4b) connected to the crossover wire 33U has a connected lead wire portion 32U1 corresponding to the coil winding start portion.
  • the connected lead wire portion 32U1 is connected to the crossover wire 33U.
  • the connected lead wire portion 32U1 protrudes to the other side in the axial direction of the U-phase coil wire 32U.
  • the third U-phase coil wire 32U (corresponding to the left coil wire in FIGS. 4a and 4b) connected to the crossover wire 33U corresponds to the coil winding start portion, and the axis of the U-phase coil wire 32U. It has the connection leader line part 32U1 which protrudes in the direction other side.
  • the second coil group 31V and the third coil group 31W have the same shape as the first coil group 31U except that currents of different phases flow. Therefore, the second coil group 31V has three V-phase coil wires 32V connected by two connecting wires 33V.
  • the winding start portion 35V of the conducting wire 34V in the second coil group 31V is drawn upward.
  • the winding end portion 36V of the second coil group 31V is drawn radially outward from the side end face of the V-phase coil wire 32V when viewed in the axial direction.
  • the winding start portion 35V of the conducting wire 34V protrudes to the other side in the axial direction of the V-phase coil wire 32V.
  • the two V-phase coil wires 32V connected to the crossover wire 33V correspond to coil winding start portions, and have a connected lead wire portion 32V1 protruding to the other side in the axial direction of the V-phase coil wire 32V. Note that the connecting lead wire portion 32V1 is connected to the crossover wire 33V.
  • the third coil group 31W has three W-phase coil wires 32W connected by two crossover wires 33W.
  • the winding start portion 35W of the conducting wire 34W in the third coil group 31W is drawn upward.
  • the winding end portion 36W of the third coil group 31W is drawn radially outward from the side end face of the W-phase coil wire 32W when viewed in the axial direction.
  • the winding start portion 35W of the conducting wire 34W protrudes to the other side in the axial direction of the W-phase coil wire 32W.
  • the two W-phase coil wires 32W connected to the crossover wire 33W correspond to the coil winding start portion, and have a connected lead wire portion 32W1 protruding to the other side in the axial direction of the W-phase coil wire 32W.
  • the connecting lead wire portion 32W1 is connected to the crossover wire 33W.
  • the winding start portions 35U, 35V, and 35W of the first coil group 31U, the second coil group 31V, and the third coil group 31W are connected to the circuit board 40 in regions not shown.
  • the winding end portions 36U, 36V, 36W of the first coil group 31U, the second coil group 31V, and the third coil group 31W are pulled out to positions overlapping the core back 21a when viewed in the axial direction, and are twisted together in a region not shown. Are combined to form a neutral point. *
  • Each coil wire (U-phase coil wire 32U, V-phase coil wire 32V, and W-phase coil wire 32W) of first coil group 31U, second coil group 31V, and third coil group 31W is adjacent in this order in the circumferential direction. It is attached to each of the teeth 21b.
  • a groove 25 that is recessed in the radial direction is provided on the inner peripheral surface 21a1 of the core back 21a where the coil wire 32 faces in the radial direction. That is, the inner peripheral surface 21 a 1 of the core back 21 a has the groove 25.
  • the groove 25 has an opening 25a that opens in the axial direction of the core back 21a. Therefore, the opening 25a by the groove 25 is provided on the upper end surface of the core back 21a in a state in plan view.
  • the stator core 21 of the present embodiment further includes a protruding portion 28 that protrudes radially inward from the core back 21a between adjacent teeth 21b.
  • the protruding portion 28 includes a pair of protruding portion outer surfaces 28a positioned in the circumferential direction of the outer surfaces and a tip portion connecting the radially inner ends of the pair of protruding portion outer surfaces 28a. 28b.
  • the distal end portion 28b has a flat surface that faces radially inward.
  • the protruding portion 28 functions as a heat dissipation path of the coil wire 32. *
  • the outer diameter of the portion overlapping the bulging portion 17 bulges outward.
  • the bulging portion 17 when viewed from the axial direction, the bulging portion 17 is radially inward from the imaginary line SS that connects the tips of the adjacent projections 28 (tips of the projection outside surface 28a). Located in. Although FIG. 9 shows a state in which the virtual line SS and the radially inner end of the bulging portion 17 coincide with each other, the bulging portion 17 may be moved further radially outward. According to this configuration, the contact between the protruding portion 28 and the coil wire 32 swelled with the outer diameter can be avoided by being provided in the bulging portion 17.
  • the coil wire 32 that has been densely wound in advance by a winding device is press-fitted into the teeth 21b, so that the coil wire 32 can be connected to the teeth without using a special mechanism or another member. It can be stably attached to 21b. Therefore, the work of attaching the coil wire 32 is facilitated.
  • the grooves 25 are provided on both sides of the teeth 21b. That is, the groove
  • the shape of the stator core 21 is symmetrical with respect to the central axis T1 of the teeth 21b, the occurrence of magnetic unbalance in the stator 20 is reduced.
  • the number of teeth 21b is nine, 18 grooves 25 are provided on the inner peripheral surface 21a1 of the core back 21a.
  • the U-phase coil wire 32U attached to the tooth 21b is provided with at least a part of the winding start portion 35U and the connecting lead wire portion 32U1 in the groove 25. That is, the U-phase coil wire 32U of the present embodiment has a lead wire portion (a winding start portion 35U and a connected lead wire portion 32U1) at least partially provided in the groove 25. Specifically, the winding start portion 35U extends along the groove 25 to the upper side of the core back 21a, and is drawn out to the upper side of the stator 20 through the opening 25a.
  • the connecting lead wire portion 32U1 extends along the groove 25 to the upper side of the core back 21a, and is drawn upward of the stator 20 through the opening portion 25a to be connected to the crossover wire 33U. *
  • channel 25 is not provided is considered as a comparative example.
  • the U-phase coil wire 32U cannot be inserted to the base of the tooth 21b, and the U-phase coil wire 32U and the core back There will be a gap between 21a.
  • the tip of the tooth 21b corresponds to a portion located on the innermost side in the radial direction of the tooth 21b, more specifically, a portion facing the rotor 10.
  • the base portion of the tooth 21b corresponds to a portion located on the outermost side in the radial direction of the tooth 21b, and more specifically is a connecting portion between the inner peripheral surface 21a1 and the tooth 21b.
  • the stator 20 of this embodiment since at least a part of the winding start portion 35U and the connecting lead wire portion 32U1 is accommodated in the groove 25, the U-phase coil wire 32U is inserted closer to the base portion of the tooth 21b. State. As a result, the gap in the slot 23 is reduced and the space factor of the coil is prevented from being lowered, so that the performance of the motor 100 can be further improved.
  • the V-phase coil wire 32V attached to the tooth 21b at least a part of the winding start portion 35V and the connecting lead wire portion 32V1 is provided in the groove 25. That is, the V-phase coil wire 32 ⁇ / b> V of the present embodiment has a lead wire portion (a winding start portion 35 ⁇ / b> V and a connected lead wire portion 32 ⁇ / b> V ⁇ b> 1) at least partially provided in the groove 25.
  • the winding start portion 35U extends along the groove 25 to the upper side of the core back 21a, and is drawn out to the upper side of the stator 20 through the opening 25a.
  • the connecting lead wire portion 32V1 extends along the groove 25 to the upper portion of the core back 21a, and is drawn upward of the stator 20 through the opening portion 25a to be connected to the crossover wire 33V. Therefore, the V-phase coil wire 32V is inserted closer to the base of the teeth 21b.
  • the W-phase coil wire 32W of the present embodiment has a lead wire portion (winding start portion 35W and connecting lead wire portion 32W1) at least partially provided in the groove 25.
  • the winding start portion 35W extends along the groove 25 to the upper side of the core back 21a, and is drawn out to the upper side of the stator 20 through the opening 25a.
  • the connecting lead wire portion 32W1 extends along the groove 25 to the upper portion of the core back 21a, and is drawn upward of the stator 20 through the opening portion 25a to be connected to the crossover wire 33W. Therefore, the W-phase coil wire 32W is inserted to a position closer to the base of the tooth 21b.
  • a part of the mold resin 50 enters the groove 25. That is, since the groove 25 functions as a resin filling path when filling the mold resin 50, the mold resin 50 is disposed between the core back 21 a and the coil wire 32 without any gap. When filling the mold resin, since the mold resin 50 passes through the inside of the groove 25, the mold resin 50 can be filled efficiently.
  • the coil group 31 (the first coil group 31U and the second coil group 31V) provided on the stator core 21 in a state where the connecting wire 33 is bent radially outward.
  • a third coil group 31W a third coil group 31W.
  • the configuration of the first coil group 31U will be described as an example, but the same applies to the second coil group 31V and the third coil group 31W.
  • the connecting wire 33U in the first coil group 31U has a portion in which the curvature of the connecting wire 33U in a plane orthogonal to the axial direction is larger than the curvature R1 of the core back 21a.
  • the curvature R1 of the core back 21a is defined by the radially outer peripheral surface.
  • the connecting wire 33U has a wiring portion 37U that overlaps the core back 21a when the stator core 21 is viewed in the axial direction.
  • the crossover wire 33 is prevented from entering between the U-phase coil wire 32U and the core back 21a in the radial direction. Therefore, U-phase coil wire 32U is satisfactorily attached to teeth 21b, and a gap is hardly generated between U-phase coil wire 32U and core back 21a.
  • the connecting wire 33U does not prevent the insertion of the V-phase coil wire 32V or the W-phase coil wire 32W attached to the tooth 21b after the U-phase coil wire 32U.
  • the crossover wire 33U is located on the radially outer side of the connecting lead wire portions 32V1, 32W1 of the other coil group 31 (the second coil group 31V and the third coil group 31W). Therefore, the crossover wire 33U is difficult to prevent the insertion of the V-phase coil wire 32V or the W-phase coil wire 32W attached to the teeth 21b after the U-phase coil wire 32U.
  • the crossover wire 33U has a connecting portion 38U that is connected to the coil wire 32 (U-phase coil wire 32U) on the radially inner side of the core back 21a. Since the connecting portion 38U is located on the radially inner side with respect to the wiring portion 37U, the connecting wire 33U is connected to the connecting portion 38U in a curved state. Therefore, when the stator core 21 is viewed in the axial direction, the curvature R2 of the connecting portion 38U is larger than the curvature R3 of the wiring portion 37U. Thus, by positioning the connecting portion 38U radially inward of the core back 21a, it is possible to easily provide a portion with a large curvature in the crossover wire 33U. Note that the curvature R3 of the wiring portion 37U overlapping the core back 21a is substantially the same as the curvature R1 of the core back 21a. *
  • the crossover wire 33U is elastically deformed.
  • the connecting wire 33 extends in a straight line. Therefore, an elastic force is generated in the connecting wire 33U that is elastically deformed so as to return to the straight shape.
  • a force for making the entire curvature uniform acts on the crossover wire 33U having the connecting portion 38U having a relatively large curvature so as to match the wiring portion 37U. Accordingly, since the connecting portion 38U extends radially outward, a force is applied to press the U-phase coil wire 32U connected to the connecting portion 38U against the inner peripheral surface 21a1 of the core back 21a.
  • the U-phase coil wire 32U can be pressed against the inner peripheral surface 21a1 of the core back 21a by the elastic force generated in the connecting wire 33U. Thereby, the U-phase coil wire 32U can be easily and stably attached to the umbrella-less teeth 21b without using a special mechanism or member. Therefore, during the assembly of the stator 20, it is possible to prevent the U-phase coil wire 32U from dropping from the teeth 21b and the U-phase coil wire 32U from being misaligned with respect to the teeth 21b. *
  • the V-phase coil wire 32V and the W-phase coil wire 32W can be easily and stably attached to the umbrella-less type tooth 21b without using a special mechanism or member. . Therefore, it is possible to prevent the V-phase coil wire 32 ⁇ / b> V and the W-phase coil wire 32 ⁇ / b> W from dropping off from the teeth 21 b and the occurrence of positional deviation. Further, a gap generated between the V-phase coil wire 32V and the W-phase coil wire 32W and the core back 21a is reduced. Thereby, the V-phase coil wire 32V and the W-phase coil wire 32W can be favorably pressed against the inner peripheral surface 21a1 of the core back 21a. *
  • the U-phase coil wire 32U, the V-phase coil wire 32V, and the W-phase coil wire 32W are collectively referred to simply as the coil wire 32. *
  • a recess 27 that is recessed radially inward is provided at a position corresponding to the tooth 21b on the outer peripheral surface 21a2 of the core back 21a. That is, the recessed part 27 is located in the radial direction outer side of the teeth 21b.
  • the recess 27 is used for positioning when the stator core 21 is attached to the housing 3 of the motor case 2, for example.
  • the number of the concave portions 27 may be at least one, but in the stator core 21 of the present embodiment, the nine concave portions 27 are evenly arranged in the circumferential direction, thereby generating magnetic unbalance in the stator 20. Can be reduced. *
  • the central axis T1 of the tooth 21b along the radial direction is perpendicular to the surface along the inner peripheral surface 21a1. That is, the inner peripheral surface 21a1 of the core back 21a has a shape that is recessed outward in the radial direction as the distance from the base portion of the teeth 21b increases. According to this structure, the capacity
  • the central axis T1 and the inner peripheral surface 21a1 being vertical means that the angle between the central axis T1 and the inner peripheral surface 21a1 is not limited to 90 degrees, and the slot capacity is larger than that of the cylindrical inner peripheral surface as described above. If it is an aspect that can be enlarged, it may be slightly deviated from the vertical. *
  • the width H1 of the portion of the core back 21a where the groove 25 is provided is preferably equal to or greater than the width H2 of the portion of the core back 21a where the protruding portion 28 is provided.
  • the width H1 is defined by the minimum width between the bottom surface 27a of the concave portion 27 and the groove 25.
  • the width H1 is defined by the width in the radial direction between the groove 25 and the outer peripheral surface 21a2.
  • the width H2 is defined by the minimum value of the width in the radial direction of the core back 21a.
  • the width H2 is the radial width between the intersection of the inner peripheral surface 21a1 and the protruding portion 28 and the outer peripheral surface 21a2. It is prescribed. *
  • the width H1 is equal to or greater than the width H2 of the core back 21a (H1 ⁇ H2), or the width H2 is equal to or greater than the width H1 of the core back 21a (H2 ⁇ H1).
  • the protruding portion outer surface 28a of the protruding portion 28 and the inner peripheral surface 21a1 of the core back 21a intersect perpendicularly, the occurrence of magnetic saturation due to the narrow width of the core back 21a can be reduced. Therefore, it is possible to suppress a decrease in the magnetic characteristics of the stator 20 due to the protrusions 28.
  • the width H2 of the core back 21a may be larger than the width H1 (H2> H1).
  • H1 H2> H1
  • the protrusion part outer surface 28a located in the circumferential direction among the outer surfaces of the protrusion part 28 is outside the protrusion part in the circumferential direction among the outer surfaces of the teeth 21b adjacent to the protrusion part outer surface 28a. It is parallel to the teeth outer surface 21c facing the side surface 28a, and the protruding portion outer surface 28a intersects the surface along the inner peripheral surface 21a1 of the core back 21a perpendicularly. That is, the tooth outer surface 21c of the tooth 21b intersects the surface along the inner peripheral surface 21a1 perpendicularly.
  • protrusion outer surface 28a and the teeth outer surface 21c are parallel includes a state where the protrusion outer surface 28a and the teeth outer surface 21c are substantially parallel to each other. That the protrusion outer surface 28a and the surface along the inner peripheral surface 21a1 intersect perpendicularly includes a state in which the protrusion outer surface 28a and the inner peripheral surface 21a1 intersect substantially perpendicularly.
  • the protrusion outer surface 28a and the teeth outer surface 21c being parallel are not limited to the case where the protrusion outer surface 28a and the teeth outer surface 21c are completely parallel, and the slot capacity is affected. Allow a state where each other is tilted so as not to reach.
  • the protrusion outer surface 28a and the inner peripheral surface 21a1 being vertical means that the angle formed by the protrusion outer surface 28a and the inner peripheral surface 21a1 is not limited to 90 degrees, as compared with the circular inner peripheral surface as described above. As long as the slot capacity can be increased, the slot capacity may be slightly deviated from the vertical. *
  • the protruding portion 28 has a tapered shape in which the radially inner width H4 is narrower than the radially outer width H3.
  • the tip portion 28b of the protruding portion 28 has a flat surface that faces radially inward. Therefore, the tip 28b is not sharp and sharp.
  • tip part 28b insulation can be provided over the stator core 21 whole.
  • the virtual plane MM including the protruding portion outer surface 28a of the protruding portion 28 does not intersect with the teeth 21b adjacent to the protruding portion 28. That is, the length in the radial direction of the teeth 21b is set so that the tip 21d does not intersect the virtual plane MM.
  • the coil wire 32 is arrange
  • the coil wire 32 of the present embodiment has a shape that does not intersect with the virtual plane MM in a plan view.
  • the outer shape of the coil wire 32 may be formed along the virtual plane MM.
  • the outer diameter D1 of the coil wire 32 on the teeth base side is larger than the outer diameter D2 of the teeth tip side. More specifically, when viewed in a plan view, the coil wire 32 of the present embodiment includes the same-diameter portion 24a having a constant outer diameter, and the outer diameter is radially inward, as shown by a two-dot chain line in FIG. And an inclined portion 24b that becomes smaller as it goes to.
  • the outer diameter of the same diameter portion 24a is constant in the radial direction.
  • the constant outer diameter is not limited to an aspect in which the outer diameter does not change at all, but includes a state in which the outer diameter is substantially constant.
  • the same diameter portion 24a is located on the radially outer side with respect to the inclined portion 24b, and the surface 24b1 located in the circumferential direction among the outer surfaces of the inclined portion 24b is outside the teeth 21b on both sides in the circumferential direction of the coil wire 32. It is parallel to the surface 21e facing the inclined portion 24b in the circumferential direction of the teeth outer surface 21c. That the surface 24b1 and the surface 21e are parallel includes a substantially parallel state. That is, in the coil wire 32 of the present embodiment, the outer line of the same-diameter portion 24a extends from the inner peripheral surface 21a1 toward the radially inner side along the protruding portion outer surface 28a of the protruding portion 28, and the outer line of the inclined portion 24b. Extends along the virtual plane MM. *
  • stator core 21 of the present embodiment since the tooth 21b and the virtual plane MM do not intersect, when the coil wire 32 is attached to the tooth 21b, contact with the other coil wire 32 attached to the adjacent tooth 21b is prevented. Can be prevented. Further, as described above, since the coil wire 32 having the teeth base side outer diameter D1 larger than the teeth tip side outer diameter D2 is provided, the coil wire 32 can be wound while preventing interference between adjacent coil wires 32. You can increase the number. *
  • the coil wire 32 can be easily and stably attached to the umbrella-less type tooth 21b without using a special mechanism or member. Therefore, during the assembly of the stator 20, it is possible to prevent the coil wire 32 from dropping from the tooth 21 b and the occurrence of the positional deviation of the coil wire 32 with respect to the tooth 21 b. Therefore, the highly reliable stator 20 is provided.
  • the teeth outer surface 21c of the teeth 21b and the inner peripheral surface 21a1 of the core back 21a intersect perpendicularly.
  • the central axis T1 of the tooth 21b and the inner peripheral surface 21a1 are perpendicular to each other. That is, the tooth outer surface 21c and the inner peripheral surface 21a1 of the tooth 21b are perpendicular to each other. Furthermore, the protrusion outer surface 28a of the protrusion 28 and the surface along the inner peripheral surface 21a1 of the core back 21a are perpendicular.
  • the stator 20 of this embodiment since the contact area of the coil wire 32 and the core back 21a increases, the heat generated in the coil wire 32 is efficiently transmitted to the core back 21a. Thereby, since the heat dissipation of the coil wire 32 improves, the increase in coil resistance by a temperature rise can be suppressed. Therefore, the performance of the motor 100 can be further improved.
  • the stator 20 of this embodiment is provided with the protrusion part 28 between the adjacent teeth 21b.
  • the heat generated in the coil wire 32 is transmitted to the core back 21a via the protruding portion 28 and released to the outside. That is, the protrusion 28 functions as a heat dissipation path for the coil wire 32. Since the protrusion part 28 is comprised with a member with high heat conductivity compared with air or resin, the heat dissipation of the coil wire 32 can be improved more.
  • channel 25 is provided in the both sides of the teeth 21b.
  • the coil wire which consists of various winding patterns different from the form shown in Drawing 4a and 4b. That is, for example, it is possible to deal with a case in which two lead wires projecting to the other side in the axial direction of the coil wire 32, or a case in which the lead wire lead direction is opposite to the coil wire 32 in the radial direction, etc. . Therefore, the same effect (an improvement in space factor and heat dissipation) can be obtained in a motor using coil wires of various winding patterns. *
  • FIG. 6 is a plan view of a jig used for attaching the coil wire 32
  • FIG. 7 is an explanatory view of attaching the coil wire 32 to the stator core 21.
  • a coil wire attachment jig 60 shown in FIG. 6 has a holding portion 61 that holds the coil wire 32 and a shaft 62 that passes through the center of the holding portion 61.
  • the shaft 62 defines the center of the coil wire attachment jig 60 and functions as a gripping part when moving the coil wire attachment jig 60.
  • the holding portion 61 has three rod-like coil wire holding portions 61b extending radially around the circular main body portion 61a. That is, the holding unit 61 can simultaneously hold the three coil wires 32 of the coil group 31.
  • the holding portion 61 is set so that the position of each coil wire holding portion 61b is set so that the coil wire holding portion 61b is disposed at a position facing the teeth 21b.
  • a convex portion 61c is provided at the tip of each coil wire holding portion 61b.
  • the coil wire holding portion 61b has a length such that the protruding portion 61c at the tip is exposed while the coil wire 32 is held.
  • FIG. 7 A manufacturing process of the stator 20 will be described.
  • a coil wire attachment jig 60 in which each coil wire 32 of the coil group 31 is attached to each coil wire holding portion 61b is attached in a stator core 21 held on a pedestal (not shown).
  • the coil wire attachment jig 60 is inserted into the stator core 21 so that the shaft 62 of the coil wire attachment jig 60 and the center axis J of the stator core 21 are aligned, and the convex portion 61c of the coil wire holding portion 61b. Is inserted into the recess 21d1 of the tooth 21b.
  • the coil wire attachment jig 60 is securely attached to the stator core 21.
  • the coil wires 32 are attached to the teeth 21b by sliding the coil wires 32 held by the coil wire holding portion 61b radially outward.
  • the coil wire 32 can be attached to the three teeth 21b in the same process.
  • the coil wire 32 can be easily attached by press-fitting from the tip 21B of the tooth 21b toward the base 21A.
  • the coil wire 32 is attached to the tooth 21 b in a state in which the coil wire 32 is prevented from being detached by the bulging portion 17.
  • the coil wire 32 can be prevented from dropping off from the teeth 21 b and the positional deviation of the coil wire 32 with respect to the teeth 21 b can be suppressed.
  • the coil group 31 since the coil group 31 is held by the coil wire mounting jig 60 in a state where the crossover wire 33 is bent radially outward, the crossover wire 33 connected to the coil wire 32 attached to the tooth 21b is , Bent radially outward. Therefore, the coil group 31 can press the coil wire 32 against the inner peripheral surface 21a1 of the core back 21a by the elastic force generated in the connecting wire 33. Thereby, during the assembly of the stator 20, the coil wire 32 can be prevented from dropping off from the teeth 21 b and the positional deviation of the coil wire 32 with respect to the teeth 21 b can be suppressed.
  • the teeth 21b to which the coil wire 32 is not attached and the coil wire holding portion 61b are aligned with the stator core 21.
  • the coil wire attachment jig 60 is attached, and the coil wire 32 is attached to each tooth 21b.
  • the same operation is repeated until the coil wires 32 are attached to all the teeth 21b. Since the stator core 21 of the present embodiment has nine teeth 21b, the attachment of the coil wires 32 to all the teeth 21b is completed by repeating the attachment operation by the coil wire attachment jig 60 three times. As described above, the attachment of the coil wire 32 to each tooth 21b of the stator core 21 is completed. In this way, the manufacture of the stator 20 is completed. *
  • the coil wire 32 can be easily and stably attached to the teeth 21b without using a special mechanism or member. Therefore, during the assembly of the stator 20, it is possible to prevent the coil wire 32 from dropping from the tooth 21 b and the occurrence of the positional deviation of the coil wire 32 with respect to the tooth 21 b. Therefore, the highly reliable stator 20 can be provided.
  • FIG. 8 is a plan view of a jig used for resin filling. *
  • a resin filling jig 70 shown in FIG. 8 includes a pedestal 71, a mold member 72, and a screw member 73.
  • the pedestal 71 has a recess 71 a for holding the housing 3.
  • the recess 71 a includes a recess 71 b that protrudes below the bottom plate portion 3 a of the housing 3, and an opening 71 c that connects the recess 71 b and penetrates the pedestal 71.
  • the recess 71b accommodates the bearing holding portion 3c.
  • the mold member 72 has a first portion 72A, a second portion 72B, and a third portion 72C.
  • the first portion 72A, the second portion 72B, and the third portion 72C are made of a cylindrical member, and the outer diameter decreases in the order of the first portion 72A, the second portion 72B, and the third portion 72C. That is, the mold member 72 has an annular end surface 72a formed by projecting the end portion of the first portion 72A radially outward at the connection portion between the first portion 72A and the second portion 72B.
  • the outer diameter of the first portion 72 ⁇ / b> A is equal to or larger than the outer diameter of the rotor 10. *
  • the mold member 72 includes a ring-shaped recess 72b provided in a contact portion with the housing 3 in the first portion 72A, a ring-shaped seal member 74 disposed in the recess 72b, and a screw hole 72c.
  • the seal member 74 is, for example, an O-ring.
  • the mold member 72 is fixed to the pedestal portion 71 by a screw member 73 accommodated in the opening 71 c of the pedestal portion 71 while being in contact with the housing 3.
  • the housing 3 is sandwiched and held between the pedestal 71 and the mold member 72, so that the housing 3 is securely fixed to the resin filling jig 70.
  • the end surface 72 a is located below the cutout portion 6 (on the coil wire 32 side).
  • the resin material 50a is filled from above the peripheral wall portion 3b of the housing 3 installed on a horizontal plane. Specifically, the resin material 50 a is filled until the upper surface of the resin material 50 a reaches the height of the end surface 72 a of the mold member 72.
  • the mold resin 50 obtained by curing the resin material 50a has substantially the same height as the end surface 72a. Is provided. Therefore, the mold resin 50 does not leak out from the notch 6 located above the end surface 72a. Since the mold member 72 has the end surface 72a, the filling amount of the resin material 50a can be visually recognized, and the filling amount can be controlled.
  • the mold resin 50 can be molded into a predetermined shape by properly arranging the resin material 50a in the space formed by the housing 3 and the mold member 72. Thereby, the mold resin 50 has an opening for accommodating the rotor 10.
  • the mold member 72 and the base portion 71 are separated by removing the screw member 73. Thereafter, the housing 3 is removed from the pedestal 71, the rotor 10 is disposed in the opening of the mold resin 50, the rotation detection sensor 41 is disposed above the rotor 10, and then the lid 4 having the circuit board 40 is attached to the housing 3.
  • the motor 100 of the embodiment is manufactured.
  • the motor 100 of the present embodiment since the coil wire 32 can be stably held with an inexpensive configuration without using a special mechanism or member on the teeth 21b, a low-cost and highly reliable motor can be provided. Moreover, since the motor 100 of this embodiment is provided with the stator 20 which improves a coil space factor and heat dissipation, it becomes a high performance motor. *
  • FIG. 10 is a plan view of a stator core according to a modification.
  • the stator core 121 of the present modification includes an annular core back 21a and a plurality of teeth 121b.
  • Teeth 121b has a pair of teeth outer side surfaces 121c and a bulging portion 117 located in the circumferential direction.
  • the pair of teeth outer surfaces 121c are parallel to each other.
  • the bulging part 117 is provided in the approximate center of the radial direction in the teeth 121b. *
  • the bulging portion 117 of this modification has a first outer surface 117c, a first inclined surface 117a, and a second inclined surface 117b as viewed in the axial direction.
  • the first outer surface 117c is positioned in the circumferential direction on the outer surface of the bulging portion 117, and is substantially parallel to the central axis T1 of the tooth 121b.
  • the first outer surface 117c is a flat surface.
  • the first inclined surface 117a is connected to the tooth outer surface 121c of the tooth 121b on the radially inner side, and extends obliquely away from the central axis T1 of the tooth 121b toward the radially outer side, and the radial direction of the first outer surface 117c. Connected inside. *
  • the second inclined surface 117b is connected to the tooth outer surface 121c of the tooth 121b on the radially outer side than the first inclined surface 117a, and extends obliquely away from the central axis T1 of the tooth 121b toward the radially inner side.
  • the first outer surface 117c is connected to the outer side in the radial direction. Based on such a configuration, the bulging portion 117 of the present modification has a substantially trapezoidal shape that is convex in the circumferential direction when viewed in the axial direction.
  • the ratio which the bulging part 117 of this modification occupies for the whole teeth 121b increases in radial direction.
  • the coil wire 32 attached to the tooth 121b has a larger area overlapping with the bulging portion 117, so that the force applied to the coil wire 32 by the tooth 121b increases. Therefore, the bulging part 117 of the present modification can stably hold the coil wire 32 by the teeth 121b.
  • the coil wire 32 is pressed into the teeth 121b without using a special mechanism or another member by press-fitting the coil wire 32 that has been densely wound in advance by a winding device. Can be attached stably.
  • the case where the bulging portions 17 and 117 are provided at the approximate center in the radial direction of the teeth 21b and 121b is taken as an example. It is not limited to. For example, it may have a shape that becomes thicker at one end from the tip 21B toward the base 21A and then becomes narrower (narrowed) toward the base again. That is, the bulging part may be provided at the tip 21B.
  • the mold resin 50 is disposed has been described as an example. However, since the present invention can stably hold the coil wire 32 on the teeth 21b, the mold resin 50 can be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Conformément à un mode de réalisation, la présente invention concerne un stator qui comporte un noyau de stator comprenant un dos de noyau annulaire s'étendant dans une direction circonférentielle autour d'un axe s'étendant dans une direction, et une pluralité de dents s'étendant dans une direction radiale à partir du dos de noyau, et une pluralité de fils à bobiner disposés sur la pluralité de dents, chaque dent comprenant une partie de renflement qui est plus épaisse, dans une direction orthogonale à un axe central de la dent, qu'une extrémité distale de la dent, davantage vers un côté de partie de base que l'extrémité distale de la dent dans la direction radiale, et au moins certains des fils à bobiner étant disposés sur la partie de renflement.
PCT/JP2019/013383 2018-03-30 2019-03-27 Stator et moteur Ceased WO2019189478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-068015 2018-03-30
JP2018068015 2018-03-30

Publications (1)

Publication Number Publication Date
WO2019189478A1 true WO2019189478A1 (fr) 2019-10-03

Family

ID=68062201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/013383 Ceased WO2019189478A1 (fr) 2018-03-30 2019-03-27 Stator et moteur

Country Status (1)

Country Link
WO (1) WO2019189478A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025180877A1 (fr) * 2024-02-26 2025-09-04 Schaeffler Technologies AG & Co. KG Stator, moteur électrique, dispositif de nettoyage et procédé de production

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5713938A (en) * 1980-06-25 1982-01-25 Hitachi Ltd Field pole of rotary electric machine
JP2003153472A (ja) * 2001-08-30 2003-05-23 Yukio Kinoshita 回転電機及び電磁機器
JP2004187488A (ja) * 2002-11-19 2004-07-02 Fanuc Ltd 電動機
JP2008160939A (ja) * 2006-12-21 2008-07-10 Toyota Motor Corp ステータコア
JP2009141992A (ja) * 2007-12-03 2009-06-25 Denso Corp 回転機
JP2011254689A (ja) * 2010-06-04 2011-12-15 Toyota Motor Corp 絶縁部材、ステータの製造方法
JP2013066313A (ja) * 2011-09-19 2013-04-11 Nippon Densan Corp モータおよびモータの製造方法
WO2016021070A1 (fr) * 2014-08-08 2016-02-11 三菱電機株式会社 Moteur à courant alternatif

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5713938A (en) * 1980-06-25 1982-01-25 Hitachi Ltd Field pole of rotary electric machine
JP2003153472A (ja) * 2001-08-30 2003-05-23 Yukio Kinoshita 回転電機及び電磁機器
JP2004187488A (ja) * 2002-11-19 2004-07-02 Fanuc Ltd 電動機
JP2008160939A (ja) * 2006-12-21 2008-07-10 Toyota Motor Corp ステータコア
JP2009141992A (ja) * 2007-12-03 2009-06-25 Denso Corp 回転機
JP2011254689A (ja) * 2010-06-04 2011-12-15 Toyota Motor Corp 絶縁部材、ステータの製造方法
JP2013066313A (ja) * 2011-09-19 2013-04-11 Nippon Densan Corp モータおよびモータの製造方法
WO2016021070A1 (fr) * 2014-08-08 2016-02-11 三菱電機株式会社 Moteur à courant alternatif

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025180877A1 (fr) * 2024-02-26 2025-09-04 Schaeffler Technologies AG & Co. KG Stator, moteur électrique, dispositif de nettoyage et procédé de production

Similar Documents

Publication Publication Date Title
US9496762B2 (en) Motor
JP6589336B2 (ja) モータおよび車載装置
JP3825024B2 (ja) クローポール型ステッピングモータ
JP5827840B2 (ja) Ｖｒ型レゾルバ
JPWO2017138534A1 (ja) ステータ、モータ、およびコンプレッサ
CN108039787A (zh) 定子单元以及马达
CN104104169A (zh) 旋转电机以及转子的制造方法
JP2007049844A (ja) アウターロータ型モータ
JP2017175897A (ja) モータ
WO2019189529A1 (fr) Moteur
KR20080078950A (ko) 모터
JP6693148B2 (ja) モータ
CN104079099A (zh) 电动机
WO2019189528A1 (fr) Stator et moteur
JP5233630B2 (ja) ステータ、回転電機、ステータの製造方法および回転電機の製造方法
CN108702054B (zh) 轴向间隙型旋转电机
WO2019189526A1 (fr) Stator et moteur
JP2008312369A (ja) モータおよびモータの製造方法
JP2019030143A (ja) コネクタ及びコネクタを備えたモータ
WO2019189478A1 (fr) Stator et moteur
JP2018133989A (ja) ステータ構造およびレゾルバ
CN112910147A (zh) 定子、马达及定子的制造方法
WO2019189527A1 (fr) Stator et moteur
JP6684749B2 (ja) モータ
US10763718B2 (en) Stator core and method for manufacturing the same

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: 19777439

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 19777439

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP