WO2019082707A1 - ステータおよびモータ - Google Patents

ステータおよびモータ

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Publication number
WO2019082707A1
WO2019082707A1 PCT/JP2018/038226 JP2018038226W WO2019082707A1 WO 2019082707 A1 WO2019082707 A1 WO 2019082707A1 JP 2018038226 W JP2018038226 W JP 2018038226W WO 2019082707 A1 WO2019082707 A1 WO 2019082707A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial direction
coil
stator
support member
lead wire
Prior art date
Application number
PCT/JP2018/038226
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
晃弘 大北
貴之 右田
真郷 青野
佑基 濱田
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201880067974.8A priority Critical patent/CN111247721B/zh
Publication of WO2019082707A1 publication Critical patent/WO2019082707A1/ja

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Classifications

    • 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
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
    • 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

Definitions

  • the present invention relates to a stator and a motor.
  • a motor has a stator and a rotor.
  • the stator has a plurality of coils.
  • the lead wire drawn from the coil may be disposed on the same side in the axial direction as the crossover connecting the coils.
  • both a lead wire and a lead wire drawn from the coils and a crossover wire connecting the separated coils are disposed above the stator core in the axial direction.
  • the lead wire and the crossover wire are disposed on the same side in the axial direction of the stator core, the lead wire and the crossover wire may come in contact with each other.
  • the present invention provides a stator and a motor that can suppress contact between the lead wire and the crossover even if the lead wire and the crossover are arranged on the same side in the axial direction of the stator core. It is one of the purposes.
  • stator of the present invention comprises: an annular stator core centered on a central axis; a support member disposed on one side in the axial direction of the stator core; and a plurality of coils attached to the stator core Among the coils, at least one of the coils has a lead wire having a portion extending to one side in the axial direction and a portion arranged on one side in the axial direction of the support member, and one of the plurality of coils The coil and the other coil are disposed on the other side of the support member in the axial direction, and are connected by a crossover wire passing radially inside of a portion of the lead wire extending in the axial direction from the coil.
  • the support member penetrates the support member in the axial direction, and an outer peripheral recess recessed inward in the radial direction from the outer peripheral surface of the support member, and penetrates the support member in the axial direction.
  • a partition wall disposed between the outer peripheral recess and the through hole, wherein the partition wall is formed of the inner peripheral surface of the outer peripheral recess.
  • a first wall surface which is recessed inward in the radial direction when viewed from the axial direction, and a second wall surface that defines a portion of the inner circumferential surface of the through hole and protrudes radially inward when viewed in the axial direction;
  • the axially extending portion of the lead wire passes radially outside of the first wall surface in the outer circumferential recess.
  • one aspect of the motor of the present invention includes the above-described stator, and a rotor that can rotate around the central axis with respect to the stator.
  • stator and the motor of one aspect of the present invention even when the lead wires and the crossovers are disposed on the same side in the axial direction of the stator core, the contact between the lead wires and the crossovers can be suppressed.
  • FIG. 1 is a perspective view showing a stator and a motor of the present embodiment.
  • FIG. 2 is a cross-sectional view showing the stator and the motor of the present embodiment.
  • FIG. 3 is a perspective view showing a portion of a stator and a motor of the present embodiment.
  • FIG. 4 is a perspective view showing a portion of a stator and a motor of the present embodiment.
  • FIG. 5 is a plan view showing portions of the stator and the motor of the present embodiment.
  • the Z-axis direction appropriately shown in each drawing is a vertical direction with the positive side as the upper side and the negative side as the lower side.
  • a central axis J appropriately shown in each drawing is an imaginary line which is parallel to the Z-axis direction and extends in the vertical direction.
  • the axial direction of the central axis J that is, the direction parallel to the vertical direction
  • the radial direction centering on the central axis J is simply referred to as “radial direction”.
  • the circumferential direction centered on is simply referred to as "circumferential direction”.
  • the upper side corresponds to one side in the axial direction
  • the lower side corresponds to the other side in the axial direction.
  • the vertical direction, the upper side and the lower side are simply names for describing the relative positional relationship of each part, and the actual arrangement relationship etc. is an arrangement relationship etc. other than the arrangement relationship etc. indicated by these names. May be
  • the motor 1 of the present embodiment includes a housing 11, a contact member 70, a rotor 80, bearings 24 and 25, an attachment member 26, a sensor magnet 27, and a stator 10. And.
  • the housing 11 accommodates the rotor 80 and the stator 10.
  • the housing 11 has a lid 12, a cylinder 13, and a bearing holder 14.
  • the cover part 12 is plate shape to which a plate surface turns to an axial direction, and is annular ring shape along the circumferential direction.
  • the lid 12 is centered on the central axis J.
  • the lid 12 covers the upper side of the stator 10. More specifically, the lid 12 covers the upper side of the stator core 20, the insulator 50 and the coil 40 described later.
  • the lid 12 has a window hole 17 penetrating the lid 12 in the axial direction. When viewed from the axial direction, the window hole 17 is in the shape of a circular arc extending in the circumferential direction. A plurality of window holes 17 are provided along the circumferential direction.
  • a part of the lid 12 has a protrusion 12 a that protrudes upward.
  • the protrusion 12 a is formed, for example, by pressing the lid 12.
  • the upper surface of the protrusion 12 a is a flat surface.
  • the upper surface of the protrusion 12 a extends in the direction orthogonal to the axial direction.
  • the lid 12 has an attachment hole (not shown) which penetrates the lid 12 in the axial direction.
  • the mounting hole axially penetrates the projection 12a.
  • the cylindrical portion 13 has a cylindrical shape extending downward from the radial outer edge of the lid 12.
  • the cylindrical portion 13 is cylindrical with the central axis J as a center.
  • the cylindrical portion 13 opens downward.
  • a plurality of collar portions protruding radially outward from the lower end portion of the cylindrical portion 13 are provided along the circumferential direction.
  • the bearing holder 14 is connected to the radially inner edge of the lid 12.
  • the bearing holding portion 14 has a tubular shape extending downward from the radial inner edge portion of the lid 12.
  • the bearing holder 14 is cylindrical around the central axis J and has a bottom.
  • the bearing holder 14 holds the bearing 25.
  • the outer peripheral surface of the bearing 25 is fixed to the inner peripheral surface of the bearing holding portion 14.
  • the housing 11 is made of metal, and is made of only a single metal member having the lid 12, the cylinder 13 and the bearing holder 14. That is, the housing 11 has a metal member made of metal having the lid 12 and the cylinder 13, and the metal member is a single member.
  • the housing 11 is made of, for example, aluminum.
  • the housing 11 is manufactured, for example, by pressing a metal plate member.
  • the housing 11 may be configured of a plurality of members. Also, the housing 11 may be manufactured by a method such as cutting or casting. The material of the housing 11 may be other than metal.
  • the contact member 70 shown in FIG. 1 is a member attached to the housing 11 and capable of contacting a terminal of an external device (not shown).
  • the external device is, for example, a control device that supplies power to the motor 1 to control the motor 1.
  • the terminal of the external device in contact with the contact member 70 is, for example, a terminal for grounding.
  • the terminals of the external device contact the upper surface of the contact member 70.
  • the contact member 70 is disposed on the protrusion 12a.
  • the contact member 70 has a contact member main body and a claw portion (not shown).
  • the contact member main body has a disk shape.
  • the plate surface facing downward is in contact with the upper surface of the protrusion 12a.
  • the claws extend downward from the contact member body. The claws are inserted into the attachment holes of the lid 12, for example crimped, and hooked on the lower surface of the projection 12a.
  • the contact member 70 is a conductive member.
  • the contact member 70 is made of metal.
  • the material of the contact member 70 is, for example, different from the material of the housing 11.
  • the material of the contact member 70 may be the same as the material of the housing 11.
  • the rotor 80 is rotatable around the central axis J with respect to the stator 10. As shown in FIG. 2, the rotor 80 has a shaft 81, a rotor core 82, a rotor magnet 83, and an output portion 84.
  • the shaft 81 is disposed along the central axis J.
  • the shaft 81 has a cylindrical shape extending in the axial direction about the central axis J.
  • the mounting member 26 is fixed to the upper end portion of the shaft 81.
  • the mounting member 26 has a cylindrical shape that opens upward.
  • a sensor magnet 27 is fixed to the inside of the mounting member 26.
  • the sensor magnet 27 has a cylindrical shape that is flat in the axial direction centering on the central axis J.
  • the output unit 84 is attached to the lower end of the shaft 81.
  • the output unit 84 is cylindrical.
  • the output unit 84 is used, for example, for fixing when the motor 1 is attached to a device or the like.
  • the output unit 84 is, for example, a shaft coupling member or the like.
  • the rotor core 82 has a substantially annular shape fixed to the outer peripheral surface of the shaft 81.
  • the rotor magnet 83 is fixed to the outer peripheral surface of the rotor core 82.
  • the bearings 24, 25 rotatably support the shaft 81.
  • the bearings 24 and 25 are, for example, ball bearings.
  • the bearings 24 and 25 may be bearings other than ball bearings as long as they can support the shaft 81 rotatably.
  • the rotor core 82 may be directly fixed to the outer peripheral surface of the shaft 81 or may be fixed indirectly via a member or the like.
  • the stator 10 is radially opposed to the rotor 80 with a gap. More specifically, the stator 10 is disposed radially outside the rotor 80 with a gap.
  • the stator 10 includes a stator core 20, an insulator 50, a plurality of coils 40, a support member 31, a bus bar terminal 43, and a molded resin portion 35.
  • the stator core 20 is annular around the central axis J.
  • the stator core 20 surrounds the rotor 80 at the radially outer side of the rotor 80.
  • the stator core 20 is disposed on the radially outer side of the rotor magnet 83 so as to face the space with a gap.
  • the stator core 20 is, for example, a laminated steel plate configured by laminating a plurality of electromagnetic steel plates in the axial direction.
  • the stator core 20 may be a dust core or the like.
  • the stator core 20 has a substantially annular core back 21 and a plurality of teeth 22.
  • the core back 21 has an annular shape centered on the central axis J.
  • the teeth 22 extend radially from the inner or outer surface of the core back 21.
  • the teeth 22 extend radially inward from the core back 21.
  • the outer peripheral surface of the core back 21 is fixed to the inner peripheral surface of the cylindrical portion 13.
  • the outer peripheral surface of the core back 21 is the outer peripheral surface of the stator core 20. That is, the outer peripheral surface of stator core 20 is fixed to the inner peripheral surface of cylindrical portion 13.
  • the stator core 20 is fixed to the cylindrical portion 13 by press fitting.
  • the plurality of teeth 22 are arranged at intervals in the circumferential direction. In the present embodiment, the plurality of teeth 22 are arranged at equal intervals along the circumferential direction.
  • the insulator 50 is attached to the stator core 20.
  • the material of the insulator 50 is, for example, an insulating material such as a resin.
  • the insulator 50 has a tubular extending portion 51 through which each tooth 22 passes, and an outer wall 52 located radially outside the extending portion 51.
  • the housing 11, the contact member 70 and the mold resin portion 35 are not shown.
  • the extending portion 51 covers the teeth 22.
  • the extending portion 51 extends in the radial direction.
  • the extension portion 51 is disposed between the stator core 20 and the coil 40. That is, the insulator 50 has a portion disposed between the stator core 20 and the coil 40, and this portion is the extending portion 51.
  • the outer wall 52 extends upward from the extension 51.
  • the outer wall 52 is disposed radially outward of the coil 40 and extends in the circumferential direction.
  • the outer wall 52 projects above the coil 40.
  • the outer wall 52 has an opening 52 a.
  • the opening 52 a is recessed downward from the upper end surface of the outer wall 52 and penetrates the outer wall 52 in the radial direction.
  • the opening 52a extends in the axial direction.
  • the axial length of the opening 52a is larger than the circumferential length of the opening 52a.
  • the opening 52a has a substantially square shape.
  • the opening 52 a is provided at a position overlapping the portion of the outer wall 52 which extends upward of a lead wire 42 a described later of the coil 40.
  • the outer wall 52 of the insulator 50 can ensure insulation between the coil 40 and the cylindrical portion 13 or the like.
  • the lead wire 42a may be bent and extended radially outward from the coil 40 by temporarily passing the lead wire 42a into the opening 52a. it can.
  • the lead wire 42a can be prevented from being an obstacle to the subsequent coil winding operation, and the coil winding operation can be easily automated.
  • the outer wall 52 contacts the support member 31 from the lower side. According to the present embodiment, even if the axial distance between the support member 31 and the outer wall 52 is zero, the above-described effect can be obtained by the opening 52a.
  • the coil 40 is attached to the stator core 20.
  • the plurality of coils 40 are respectively attached to the stator core 20 at circumferential intervals.
  • the plurality of coils 40 are attached to the stator core 20 via the insulators 50.
  • the plurality of coils 40 are configured by winding a wire around each tooth 22 via the insulator 50.
  • the winding system of the coil 40 is a so-called concentrated winding system.
  • the winding system of the coil 40 may be another system other than the concentrated winding system.
  • the stator 10 has three or more coils 40, specifically, six coils 40.
  • the motor 1 is a three-phase motor.
  • the three phases are the U phase, the V phase and the W phase.
  • each coil 40 of U-phase, V-phase and W-phase is constituted by any of three conductors (a first conductor, a second conductor and a third conductor).
  • the coil 40 has a lead wire 42 and a connecting wire 41.
  • the stator 10 is provided with a plurality of lead wires 42 and a plurality of crossover wires 41. In the present embodiment, six lead wires 42 are provided and two crossover wires 41 are provided.
  • the lead wire 42 and the connecting wire 41 are both arranged above the stator core 20. That is, the lead wires 42 and the crossover wires 41 are arranged on the same side of the stator core 20 in the axial direction.
  • the lead wire 42 is drawn from the coil 40.
  • the lead wire 42 is an end portion of a lead that constitutes the coil 40.
  • the lead wire 42 extends upward from the coil 40.
  • the crossover 41 connects between one coil 40 and the other coil 40 among the plurality of coils 40.
  • the crossover 41 connects at least two coils 40 to each other.
  • the crossover 41 is disposed below the support member 31.
  • the crossover 41 extends above the coil 40 and below the support member 31.
  • the first to third conductive wires constituting the coil 40 of each phase of the U phase, the V phase and the W phase each have a connecting wire 41 and a lead wire 42. That is, the connecting wire 41 and the lead wire 42 in each phase are a part of the conducting wires (first to third conducting wires) which constitute the coil 40 of each phase.
  • At least one coil 40 a has a lead wire 42 a having a portion extending upward and a portion disposed on the upper side of the support member 31.
  • the lead wire 42 a is a lead wire 42 a drawn from one coil 40 a among the lead wires 42 of the plurality of coils 40 of the stator 10.
  • the lead wire 42 a extends upward from the coil 40 a, passes through the inside of an outer peripheral recess 31 a of the support member 31 described later, and is drawn to the upper side of the support member 31.
  • the lead wire 42 a extends in the circumferential direction on the upper side of the support member 31.
  • the lead (for example, the first lead) constituting the coil 40a from which the lead wire 42a is drawn is the lead (for example, the second lead) constituting the plurality of coils 40 connected by the crossover 41 shown in FIG. It is different. That is, the conducting wire which comprises the coil 40a which has the lead-out wire 42a differs from the conducting wire which comprises one coil 40 and the other coil 40 which the crossover 41 shown in FIG. 4 connects.
  • the current supplied to the lead wire 42a and the current supplied to the connecting wire 41 shown in FIG. 4 are out of phase with each other.
  • the crossover wire 41 passes through the radially inner side of the portion of the lead wire 42a extending upward from the coil 40a.
  • the support member 31 is disposed on the upper side of the stator core 20, the insulator 50 and the coil 40.
  • the material of the support member 31 is an insulating material such as a resin.
  • the support member 31 is made of resin.
  • the support member 31 has a main body portion 33 and a bus bar terminal holding portion 32. In FIG. 5, the housing 11, the contact member 70 and the mold resin portion 35 are not shown.
  • the main body 33 is in the form of a plate whose plate surface faces in the axial direction.
  • the main body 33 has an annular shape centered on the central axis J.
  • the main body 33 is disposed inside the housing 11.
  • the main body portion 33 is supported and fixed to the insulator 50 from the lower side.
  • the main body portion 33 has an outer peripheral recessed portion 31 a, a through hole 31 b, a partition wall portion 31 c, and a hole 33 c. That is, the support member 31 has the outer peripheral recessed part 31a, the through-hole 31b, the partition wall part 31c, and the hole 33c. The support member 31 may not have the hole 33c.
  • the outer peripheral recess 31 a penetrates the main body portion 33 in the axial direction, and is recessed radially inward from the outer peripheral surface of the main body portion 33. That is, the outer peripheral recess 31 a passes through the support member 31 in the axial direction, and is recessed radially inward from the outer peripheral surface of the support member 31.
  • the outer circumferential recess 31 a is disposed at the radially outer end of the support member 31. As viewed from the axial direction, the outer circumferential recess 31a has an opening that opens radially outward. In the outer peripheral recess 31a, a portion of the lead wire 42a extending upward from the coil 40a is passed. The lead wire 42a is drawn to the upper side of the support member 31 via the insulator 50 and the outer peripheral recess 31a.
  • the outer peripheral recess 31 a when viewed from the axial direction, is U-shaped that opens radially outward and extends in the radial direction.
  • the outer peripheral recess 31 a has a notch shape which is recessed inward in the radial direction from the outer peripheral surface of the main body portion 33.
  • a notch shape does not mean a manufacturing method but means the shape (structure) of the outer peripheral recessed portion 31a.
  • the circumferential length (width) of the outer circumferential recess 31 a is smaller than the circumferential length of the opening 52 a. Both ends in the circumferential direction of the opening 52 a are disposed on the outer side in the circumferential direction than both ends in the circumferential direction of the outer circumferential recess 31 a.
  • a pair of portions directed in the circumferential direction have linear shapes extending in the radial direction as viewed from the axial direction.
  • a pair of portions facing in the circumferential direction are opposed to each other at an interval in the circumferential direction.
  • the radially inner end portion is in the shape of a concave curve which is recessed inward in the radial direction when viewed from the axial direction, and specifically, it is in the shape of a concave arc.
  • this part is corresponded to 31 d of 1st wall surfaces which the partition wall part 31c mentions later. That is, viewed from the axial direction, at least a part of the inner peripheral surface of the outer peripheral recess 31a is recessed radially inward. In the example of the present embodiment, when viewed in the axial direction, at least a part of the inner peripheral surface of the outer peripheral recess 31a is located inside the through hole 31b described later. Although not particularly illustrated, the inner peripheral surface of the outer peripheral recess 31 a has a portion positioned radially inward of the outer wall 52 of the insulator 50 when viewed from the axial direction.
  • At least the radially inner end portion of the inner circumferential surface of the outer circumferential recess 31 a is positioned radially inward of the outer wall 52.
  • a portion of the inner circumferential surface of the outer circumferential recess 31a located radially inward of the outer wall 52 is located above the coil 40a.
  • a portion of the inner peripheral surface of the outer peripheral recess 31a located radially inward of the outer wall 52 overlaps the coil 40a as viewed from the axial direction.
  • the upper end portion of the inner peripheral surface of the outer peripheral recess 31a extends outward of the outer peripheral recess 31a in the direction perpendicular to the central axis J as it goes upward.
  • the upper end portion of the inner peripheral surface of the outer peripheral recess 31a has a convex curve shape in the cross section along the axial direction.
  • the upper end portion of the inner peripheral surface of the outer peripheral recess 31a may have a chamfered shape.
  • the chamfered shape does not mean a manufacturing method, but means the shape (configuration) of the upper end portion of the inner peripheral surface of the outer peripheral recess 31a.
  • the opening area of the cross section perpendicular to the central axis J of the outer peripheral recess 31a becomes larger toward the upper side. According to the present embodiment, even if the lead wire 42a contacts the upper end portion of the inner peripheral surface of the outer circumferential recess 31a, bending or scratching of the lead wire 42a is suppressed.
  • the through hole 31 b penetrates the main body 33 in the axial direction. That is, the through hole 31 b penetrates the support member 31 in the axial direction.
  • the through hole 31 b has a function as a lightening hole of the main body 33, for example.
  • the through hole 31 b is disposed radially inward of the outer peripheral recess 31 a.
  • the through hole 31 b is disposed adjacent to the outer circumferential recess 31 a radially inward. When viewed in the radial direction, the through holes 31 b overlap the outer peripheral recess 31 a. In the circumferential direction, the position of the through hole 31 b is the same as the position of the outer peripheral recess 31 a.
  • the through hole 31b and the outer peripheral recess 31a are provided independently of each other.
  • the through holes 31 b overlap the crossovers 41.
  • the worker assembling the motor 1, an assembly device or the like (hereinafter, the worker or the like) can easily recognize the crossover 41 through the through hole 31b.
  • the through holes 31 b extend in the circumferential direction. Both ends in the circumferential direction of the through hole 31 b are disposed on the outer side in the circumferential direction than both ends in the circumferential direction of the outer circumferential recess 31 a. According to the present embodiment, since the through holes 31 b are largely opened in the circumferential direction, the worker or the like can more easily visually recognize the crossover 41 through the through holes 31 b.
  • the through hole 31 b overlaps the outer peripheral recess 31 a even when viewed from the circumferential direction. Therefore, the dimension in the radial direction of the main body 33 can be reduced while ensuring both the function of the through hole 31 b and the function of the outer peripheral recess 31 a.
  • the partition wall portion 31c is disposed between the outer peripheral recess 31a and the through hole 31b.
  • the partition wall portion 31c has a portion located between the outer peripheral recess 31a and the through hole 31b at least in the radial direction.
  • the partition wall portion 31c is a wall portion that partitions the outer peripheral recess 31a and the through hole 31b.
  • Partition wall part 31c constitutes a part of wall part which constitutes perimeter crevice 31a, and constitutes a part of wall parts which constitute penetration hole 31b.
  • the partition wall portion 31 c has an arc shape that is convex inward in the radial direction.
  • the partition wall portion 31c has a first wall surface 31d and a second wall surface 31e.
  • the first wall surface 31 d is a wall surface facing radially outward in the partition wall portion 31 c.
  • the first wall surface 31d constitutes a portion of the inner peripheral surface of the outer peripheral recess 31a.
  • the first wall surface 31 d is located at the radially inner end of the inner peripheral surface of the outer peripheral recess 31 a.
  • the first wall surface 31 d is recessed radially inward.
  • the first wall surface 31 d when viewed from the axial direction, has an arc shape which is recessed inward in the radial direction.
  • the second wall surface 31 e is a wall surface facing inward in the radial direction in the partition wall portion 31 c.
  • the second wall surface 31e constitutes a portion of the inner peripheral surface of the through hole 31b.
  • the second wall 31e is connected to the radially outer end 31f of the inner peripheral surface of the through hole 31b.
  • the second wall surface 31e is disposed adjacent to the radially outer end 31f in the circumferential direction. As viewed from the axial direction, the second wall surface 31 e protrudes radially inward.
  • the second wall surface 31 e has an arc shape that is convex inward in the radial direction when viewed from the axial direction.
  • the part extended to the upper side of the lead wire 42a passes the radial direction outer side of 31 d of 1st wall surfaces in the outer peripheral recessed part 31a.
  • the portion of the lead wire 42a extending upward passes through the radially outer side of the radially inner end portion of the first wall surface 31d.
  • the lead wire 42a since the lead wire 42a passes through the outer peripheral recess 31a, when the stator 10 is manufactured, it is temporarily bent radially outward from the coil 40a as shown by a two-dot chain line and reference numeral 42a in FIG.
  • the laid out lead wire 42a can be bent upward as indicated by a solid line and reference numeral 42a, and can be disposed in the outer peripheral recess 31a. Specifically, when drawing the lead wire 42a from the coil 40a, first, the lead wire 42a is drawn radially outward through the opening 52a. At this time, the circumferential position of the lead wire 42 a drawn to the radially outer side of the stator core 20 is the same as the circumferential position of the outer circumferential recess 31 a. Therefore, when the radially extending lead wire 42a is raised upward, a part of the portion extending upward of the lead wire 42a is accommodated in the outer peripheral recess 31a, and the lead wire 42a is easily moved upward (toward the support member 31).
  • the stator 10 can be easily manufactured by automatic assembly using a machine or the like.
  • the lead-out wire 42a and the connecting wire 41 are mutually spaced apart and arrange
  • the lead wire 42 a and the crossover wire 41 are disposed on the same side in the axial direction of the stator core 20 (the upper side of the stator core 20 in the present embodiment). Contact is suppressed. Further, since the through holes 31 b are provided, the crossovers 41 are easily visually recognized by an operator or the like through the through holes 31 b when the stator 10 is manufactured. Then, the gap G between the lead wire 42 a and the crossover wire 41 is stably ensured. In the present embodiment, the phase of the current flowing through the lead wire 42 a is different from the phase of the current flowing through the connecting wire 41. According to the present embodiment, a short circuit between the lead wire 42 a and the crossover wire 41 can be suppressed.
  • the crossover 41 when viewed in the axial direction, the crossover 41 is disposed radially inward from the first wall surface 31 d. According to the present embodiment, the contact between the crossover wire 41 and the lead wire 42a can be further suppressed.
  • the first wall surface 31 d has a portion located radially inward of the radially outer end portion 31 f in the inner peripheral surface of the through hole 31 b.
  • the partition wall portion 31c is shaped so as to enter the inside of the through hole 31b.
  • the radial inner end of the outer peripheral recess 31 a can be easily separated from the outer peripheral surface of the support member 31.
  • the lead wire 42 a passing through the inside of the outer peripheral concave portion 31 a can be disposed apart from the tubular portion 13. Therefore, the insulation between the lead wire 42a and the cylindrical portion 13 is secured.
  • the hole 33 c penetrates the main body 33 in the axial direction.
  • the holes 33c extend in the circumferential direction.
  • a plurality of holes 33c are provided at intervals in the circumferential direction.
  • the hole 33 c has, for example, a function as a lightening hole of the main body 33.
  • the bus bar terminal holding portion 32 extends upward from the main body portion 33.
  • a plurality of bus bar terminal holding portions 32 are provided along the circumferential direction. In the present embodiment, three bus bar terminal holding portions 32 are provided.
  • the bus bar terminal holding portion 32 holds the bus bar terminal 43.
  • the bus bar terminal holding portion 32 has a tubular shape extending in the axial direction, and holds the bus bar terminal 43 inside. According to the present embodiment, the bus bar terminal 43 can be easily held by the bus bar terminal holding portion 32.
  • the bus bar terminal holding portion 32 extends to the upper side than the lid portion 12 through the window hole 17 and protrudes to the outside of the housing 11.
  • the bus bar terminal 43 is supported by the support member 31 and connected to the coil 40.
  • the bus bar terminal 43 is a conductive member.
  • the bus bar terminals 43 are made of metal such as copper and silver.
  • the bus bar terminal 43 protrudes from the inside of the housing 11 to the outside of the housing 11 through the window hole 17.
  • the bus bar terminal 43 has a conductive portion 43 b and a connection portion 43 a.
  • the conduction portion 43 b is in the form of a plate whose plate surface faces in the radial direction, and extends in the axial direction. Conducting portion 43 b is inserted into and held by bus bar terminal holding portion 32. Conducting portion 43 b protrudes upward relative to bus bar terminal holding portion 32.
  • the conduction portion 43 b is connected to an external device such as a control device of the motor 1.
  • the conductive portion 43 b can be connected to, for example, a control substrate or an external power supply.
  • the connecting portion 43a is connected to the lower end of the conducting portion 43b.
  • the connection portion 43a protrudes to one side in the radial direction more than the conduction portion 43b.
  • the connection portion 43 a protrudes radially inward of the conduction portion 43 b.
  • the connection portion 43 a is connected to the lead wire 42.
  • the bus bar terminal 43 is electrically connected to the coil 40.
  • two lead wires 42 are connected to the connection portion 43a.
  • the two lead wires 42 are arranged axially in line with each other.
  • connection portion 43 a is disposed so as to protrude radially inward with respect to a surface of the bus bar terminal holding portion 32 facing inward in the radial direction.
  • connection portion 43 a connected to the lead wire 42 is disposed radially inward of a surface of the bus bar terminal holding portion 32 facing inward in the radial direction. According to the present embodiment, it is possible to suppress the difficulty in drawing the lead wire 42 in the vicinity of the bus bar terminal holding portion 32, and the connection portion 43a and the lead wire 42 can be easily connected.
  • the connection portion 43a and the lead wire 42 are welded.
  • connection portion 43a in the vertical cross section including the central axis J, the connection portion 43a has a substantially U shape opening upward.
  • Connection portion 43 a includes a portion of bus bar terminal 43 that is curved in a U-shape.
  • the connection portion 43a is formed by bending a part of the plate member into a U-shape.
  • the lead wire 42 is inserted into the connection portion 43a.
  • connection portion 43 a includes a pair of holding wall portions 43 f and 43 g and a connection portion 43 h.
  • the holding wall portions 43f and 43g have a plate shape whose plate surface faces in the radial direction.
  • the holding wall portions 43f and 43g extend in the axial direction.
  • one holding wall portion 43f is connected to the lower end of the conducting portion 43b.
  • the other holding wall portion 43g is disposed radially inward of the one holding wall portion 43f.
  • the pair of holding wall portions 43f and 43g are arranged radially spaced from each other.
  • a gap is provided between the pair of holding wall portions 43f and 43g.
  • a gap between the pair of holding wall portions 43 f and 43 g is disposed radially inward of a surface of the bus bar terminal holding portion 32 facing inward in the radial direction.
  • the lead wire 42 can be easily passed through the gap between the pair of holding wall portions 43f and 43g, and the connection portion 43a and the lead wire 42 can be easily connected.
  • the connecting portion 43h connects lower ends of the pair of holding wall portions 43f and 43g.
  • the lead wire 42 is disposed between the pair of holding wall portions 43f and 43g and contacts at least one of the pair of holding wall portions 43f and 43g and the connecting portion 43h.
  • the lead wire 42 is disposed between the pair of holding wall portions 43f and 43g in the radial direction, and in the example of the present embodiment, contacts the pair of holding wall portions 43f and 43g.
  • the bus bar terminal 43 can be made compact and simple by such a connecting portion 43 a.
  • three bus bar terminals 43 are provided along the circumferential direction.
  • the three bus bar terminals 43 are supplied with U-phase, V-phase, and W-phase alternating currents, respectively. Thereby, a three-phase alternating current is supplied to the motor 1 through the three bus bar terminals 43.
  • the motor 1 is a three-phase motor.
  • the motor 1 is not limited to a three-phase motor, and may be a single-phase motor, a two-phase motor, or a four-phase or more multi-phase motor.
  • the number of bus bar terminals 43 may be appropriately changed according to the number of phases of the motor.
  • the number of coils 40, the number of lead wires 42, and the number of crossovers 41 described above may be changed as appropriate.
  • the mold resin portion 35 is a member made of resin. As shown in FIG. 2, the mold resin portion 35 has a substantially cylindrical shape extending in the axial direction centering on the central axis J. As shown in FIGS. 1 and 2, the mold resin portion 35 covers at least a portion of the support member 31 and at least a portion of the bus bar terminal 43. According to the present embodiment, the support member 31 and the bus bar terminal 43 are fixed by the mold resin portion 35, and the support state of the bus bar terminal 43 is stabilized.
  • stator core 20 at least a portion of insulator 50, at least a portion of coil 40, at least a portion of support member 31, and at least a portion of bus bar terminal 43 are embedded in mold resin portion 35. . Therefore, the stator core 20, the insulator 50, the coil 40, the support member 31, and the bus bar terminal 43 can be integrally fixed together by the mold resin portion 35. In addition, the coil 40 can be easily insulated. In the present embodiment, the entire insulator 50 and the entire coil 40 are embedded in the mold resin portion 35.
  • the mold resin portion 35 covers the portion of the bus bar terminal 43 other than the conductive portion 43 b. At least a part of the conductive portion 43 b is exposed from the mold resin portion 35. Specifically, at least the upper end portion of the conductive portion 43 b is exposed from the mold resin portion 35. According to the present embodiment, the mold resin portion 35 secures the sealing property of the portion of the bus bar terminal 43 other than the conductive portion 43 b while securing the conduction of the conductive portion 43 b.
  • the mold resin portion 35 is manufactured, for example, by insert molding in which molten resin is poured and solidified in a mold in which the stator core 20, the insulator 50, the coil 40, the support member 31, and the bus bar terminal 43 are inserted.
  • the melted resin is poured into one side of the mold in the axial direction. That is, the resin flows around the stator core 20, the insulator 50 and the coil 40, and then reaches around the support member 31 and the bus bar terminal 43.
  • the mold resin portion 35 has a first annular portion 36, a second annular portion 37, a plurality of columnar portions (not shown), and a bus bar terminal support portion 38.
  • the first annular portion 36 has a substantially annular shape centered on the central axis J. As shown in FIG. 2, the first annular portion 36 is located above the upper surface of the stator core 20.
  • the first annular portion 36 is disposed radially outward of the rotor 80 and surrounds a portion of the rotor 80.
  • the first annular portion 36 surrounds a portion of the shaft 81 and the bearing 25 from the radially outer side.
  • the outer circumferential surface of the first annular portion 36 is disposed radially inward of the outer circumferential surface of the stator core 20.
  • the outer peripheral surface of the first annular portion 36 extends upward from the upper end surface of the core back 21.
  • the inner circumferential surface of the first annular portion 36 is disposed at the same position as the radially inner side surface of the teeth 22 in the radial direction.
  • the first annular portion 36 is disposed below the lid 12.
  • the entire first annular portion 36 is housed inside the housing 11.
  • the first annular portion 36 covers the window hole 17 from the lower side. Therefore, foreign matter can be prevented from entering the inside of the housing 11 from the outside of the housing 11 through the window hole 17.
  • the first annular portion 36 is in contact with the lower surface of the lid portion 12 along one circumferential direction. Specifically, of the upper end of the first annular portion 36, the end outside in the radial direction is the entire circumference in the circumferential direction with respect to the part of the lower surface of the lid 12 located radially outside of the window hole 17. It contacts from the lower side over.
  • the first annular portion 36 has a first hole 36 a recessed downward from the upper surface of the first annular portion 36. As shown in FIG. 1, the first hole 36 a overlaps the window hole 17 when viewed along the axial direction. Thereby, for example, by inserting a jig into the first hole 36 a from the upper side of the lid 12 through the window hole 17, the stator 10 is positioned in the circumferential direction with respect to the housing 11 while the stator 10 is housing It can be fixed at 11.
  • a plurality of first hole portions 36 a are provided along the circumferential direction.
  • the second annular portion 37 is annular with the central axis J as a center. As shown in FIG. 2, the second annular portion 37 is located below the lower surface of the stator core 20. The second annular portion 37 is disposed radially outward of the rotor 80 and surrounds a portion of the rotor 80. The second annular portion 37 surrounds a portion of the shaft 81 and a portion of the bearing 24 from the radially outer side. The outer circumferential surface of the second annular portion 37 is disposed radially inward of the outer circumferential surface of the stator core 20. The outer peripheral surface of the second annular portion 37 extends downward from the lower end surface of the core back 21. The inner circumferential surface of the second annular portion 37 is disposed at the same position as the radially inner side surface of the teeth 22 in the radial direction.
  • the lower end of the second annular portion 37 protrudes from the lower opening of the cylindrical portion 13 below the housing 11.
  • a bearing 24 is fitted and held inside the lower end of the second annular portion 37.
  • a portion of the insulator 50 below the stator core 20 and a portion of the coil 40 below the stator core 20 are embedded.
  • the plurality of columnar parts are columnar parts extending in the axial direction. Although not shown, the plurality of columnar parts are arranged at equal intervals along the circumferential direction.
  • the plurality of columnar portions are disposed in portions between the teeth 22 adjacent to each other in the circumferential direction. Each columnar portion is filled between the teeth 22 adjacent in the circumferential direction.
  • the upper end of the columnar portion is connected to the first annular portion 36.
  • the lower end of the columnar portion is connected to the second annular portion 37.
  • the columnar portion connects the first annular portion 36 and the second annular portion 37.
  • the radially inner side surface of the columnar portion is disposed at the same position as the radially inner side surface of the tooth 22 in the radial direction.
  • the inner circumferential surface of the first annular portion 36, the inner circumferential surface of the second annular portion 37, the radially inner side surface of each columnar portion, and the radially inner side surface of each tooth 22 have the same radial position. It forms a cylindrical curved surface centered on the central axis J.
  • the bus bar terminal support portion 38 has a columnar shape that protrudes upward from the first annular portion 36.
  • the upper surface of the bus bar terminal support 38 is in the form of a flat surface extending in the direction perpendicular to the central axis J.
  • the axial position of the upper surface of the bus bar terminal support portion 38 is the same as the axial position of the upper end surface of the bus bar terminal holding portion 32.
  • the upper end surface of the bus bar terminal holding portion 32 is exposed to the outside on the upper surface of the bus bar terminal support portion 38.
  • the bus bar terminal support 38 When viewed along the axial direction, the bus bar terminal support 38 extends in an arc shape along the circumferential direction.
  • the side surfaces on both sides in the circumferential direction of the bus bar terminal support portion 38 are inclined in a direction approaching each other in the circumferential direction toward the upper side.
  • the circumferential dimension of the bus bar terminal support portion 38 becomes smaller toward the upper side. Thereby, for example, when molding the bus bar terminal support portion 38 by injection molding, the mold can be easily removed.
  • the circumferential dimension of the bus bar terminal support portion 38 is smaller than the circumferential dimension of the window hole 17.
  • a plurality of bus bar terminal support portions 38 are provided along the circumferential direction.
  • three bus bar terminal support portions 38 are provided along the circumferential direction.
  • At least a part of the bus bar terminal 43 is embedded in and supported by the bus bar terminal support portion 38.
  • the lower portion of the bus bar terminal 43 and the upper portion of the bus bar terminal holding portion 32 are embedded in the bus bar terminal support portion 38.
  • the upper end of the bus bar terminal 43 projects upward from the bus bar terminal support 38.
  • the bus bar terminal support 38 is inserted into the window hole 17.
  • the bus bar terminal support portion 38 protrudes above the lid 12 through the window hole 17 from the first annular portion 36.
  • the outer edge of the bus bar terminal support 38 is disposed with a gap inside the inner edge of the window hole 17 over the entire circumference. Therefore, when the bus bar terminal support portion 38 is passed through the window hole 17, contact of the bus bar terminal support portion 38 with the inner edge of the window hole 17 can be suppressed, and distortion of the shape of the lid portion 12 can be suppressed. Further, the bus bar terminal support portion 38 can be prevented from being damaged by coming into contact with the inner edge of the window hole 17. The outer edge of the bus bar terminal support 38 may be in contact with the inner edge of the window hole 17.
  • the housing 11 has a bearing holding portion 14 connected to the radially inner edge portion of the lid 12.
  • distortion of the lid 12 can be suppressed as described above, distortion of the bearing holding portion 14 connected to the lid 12 can be suppressed. Therefore, it can suppress that the arrangement
  • one bus bar terminal support portion 38 has a second hole 39 recessed downward from the upper surface of the bus bar terminal support portion 38.
  • the second hole 39 can be used, for example, for positioning the stator 10 in the circumferential direction, attaching the external device to the bus bar terminal support 38, and the like.
  • stator 10 In the process of fixing the stator 10 to the housing 11, an operator or the like presses the stator 10 into the housing 11 from the lower opening of the cylindrical portion 13. The worker or the like moves the stator 10 upward with respect to the housing 11 until the first annular portion 36 contacts the lower surface of the lid 12. Thereby, the stator 10 is fixed to the housing 11 by press fitting.
  • the support member 31 may have a plurality of sets of the outer peripheral recess 31a, the through hole 31b, and the partition wall 31c.
  • a plurality of lead wires 42a including lead wires of other conductive wires may be arranged in the stator 10 as described above. That is, a portion of the lead wire 42a of each lead may extend through the plurality of outer peripheral recesses 31a.
  • the lead wire which constitutes coil 40a which has lead wire 42a differs from the lead wire which constitutes one coil 40 and the other coil 40 which are connected by crossover 41, this gave an example. It is not limited to.
  • the conducting wire which comprises the coil 40a which has the lead-out wire 42a may be the same as the conducting wire which comprises one coil 40 and the other coil 40 which are connected by the connecting wire 41. Also in this case, according to the present embodiment, the contact between the lead wire 42 a and the crossover wire 41 is suppressed, and the motor 1 can be easily assembled.
  • one radial side is the radial inner side.
  • the radial one side may be the radial outer side.
  • the whole bus bar terminal 43 may be covered with mold resin part 35.
  • the application of the motor of the embodiment described above is not particularly limited.
  • the motor of the embodiment described above can be used in various devices such as a pump, a brake, a clutch, a vacuum cleaner, a dryer, a ceiling fan, a washing machine, a refrigerator and an electric power steering device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
PCT/JP2018/038226 2017-10-27 2018-10-13 ステータおよびモータ WO2019082707A1 (ja)

Priority Applications (1)

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US201762577781P 2017-10-27 2017-10-27
US62/577781 2017-10-27
JP2018-043514 2018-03-09
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002247792A (ja) * 2001-02-15 2002-08-30 Hitachi Ltd 回転電機用固定子、コイル用配線処理板、及び回転電機
WO2017138534A1 (ja) * 2016-02-08 2017-08-17 日本電産株式会社 ステータ、モータ、およびコンプレッサ

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008193764A (ja) * 2007-02-01 2008-08-21 Tamagawa Seiki Co Ltd ステータ構造
KR20140087139A (ko) * 2012-12-27 2014-07-09 삼성전기주식회사 모터 및 그 제조 방법
JP6225804B2 (ja) * 2014-04-07 2017-11-08 株式会社安川電機 ボビン及び回転電機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002247792A (ja) * 2001-02-15 2002-08-30 Hitachi Ltd 回転電機用固定子、コイル用配線処理板、及び回転電機
WO2017138534A1 (ja) * 2016-02-08 2017-08-17 日本電産株式会社 ステータ、モータ、およびコンプレッサ

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CN111247721B (zh) 2022-07-19

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