WO2024195734A1 - モータ - Google Patents

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Publication number
WO2024195734A1
WO2024195734A1 PCT/JP2024/010292 JP2024010292W WO2024195734A1 WO 2024195734 A1 WO2024195734 A1 WO 2024195734A1 JP 2024010292 W JP2024010292 W JP 2024010292W WO 2024195734 A1 WO2024195734 A1 WO 2024195734A1
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WO
WIPO (PCT)
Prior art keywords
narrow
narrow portions
portions
coil end
radial direction
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/JP2024/010292
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English (en)
French (fr)
Japanese (ja)
Inventor
惇文 菊地
一幸 崎山
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to CN202480006906.6A priority Critical patent/CN120530557A/zh
Priority to JP2025508403A priority patent/JPWO2024195734A1/ja
Publication of WO2024195734A1 publication Critical patent/WO2024195734A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • This disclosure relates to a motor, and more particularly to a motor having a rotor and a stator, the stator including a plurality of windings.
  • Patent Document 1 discloses a technology for reducing eddy current loss in a motor that has a rotor and a stator, and in which the stator includes multiple windings. In this technology, each layer of the winding has a recess to reduce the loop size of the eddy current.
  • the recesses of each layer of winding are arranged in a straight line in the radial direction of the stator.
  • the objective of this disclosure is to provide a motor that can effectively reduce eddy current loss that occurs in the windings, regardless of conditions such as the frequency range.
  • a motor includes a rotor and a stator having radial, circumferential, and axial directions.
  • the rotor includes a rotor yoke and a plurality of magnets arranged on the outer peripheral surface of the rotor yoke.
  • the stator includes a stator core having a plurality of teeth positioned at a distance from one another in the circumferential direction and protruding inward in the radial direction, and a plurality of windings wound around the teeth.
  • Each of the multiple windings is formed by winding a rectangular wire around a corresponding one of the multiple teeth.
  • the wire constituting each winding includes multiple first narrow portions and multiple second narrow portions that are positioned alternately in the radial direction.
  • Each of the first narrow portions is a portion formed narrower by providing a first notch on the side of the wire that is closer to the corresponding tooth.
  • Each of the second narrow portions is a portion formed narrower by providing a second notch on the side of the wire that is farther from the corresponding tooth.
  • FIG. 1 is a plan view showing a motor according to an embodiment.
  • FIG. 2 is a cross-sectional view taken along line AA of FIG.
  • FIG. 3 is a perspective view showing a main part of the motor.
  • FIG. 4 is a front view showing the windings provided in the motor.
  • FIG. 5 is a perspective view showing the windings of the above.
  • FIG. 6 is a schematic cross-sectional view of a main part for explaining the effect of the motor.
  • FIG. 7 is a schematic cross-sectional view of a main part showing the direction of the magnetic flux generated in FIG.
  • FIG. 8 is a perspective view showing the winding of the first modified example.
  • FIG. 9 is a perspective view showing a winding according to the second modification.
  • a motor 1 includes a rotor 2 and a stator 3 .
  • the rotor 2 includes a cylindrical rotating shaft 21 that rotates about the axis C1, a rotor yoke 22 that is connected to the rotating shaft 21, and a plurality of magnets 23.
  • the axis C1 is an imaginary axis.
  • the rotor yoke 22 is a cylindrical member that has an outer peripheral surface.
  • the plurality of magnets 23 are disposed on the outer surface of the rotor yoke 22.
  • the plurality of magnets 23 are positioned in a line in the circumferential direction of the rotor yoke 22.
  • the stator 3 includes a cylindrical stator yoke 32, a number of teeth 33, and a number of windings 34.
  • the stator 3 is arranged concentrically with the rotor 2.
  • the stator 3 has a radial direction, a circumferential direction, and an axial direction.
  • the radial direction of the stator 3 coincides with the radial direction of the rotor 2
  • the circumferential direction of the stator 3 coincides with the circumferential direction of the rotor 2
  • the axial direction of the stator 3 coincides with the axial direction of the rotor 2.
  • the teeth 33 protrude radially inward (i.e., toward the rotor 2) from multiple positions spaced apart from one another in the circumferential direction on the inner surface of the stator yoke 32.
  • the multiple windings 34 are wound in a spiral shape around each of the multiple teeth 33. There is a one-to-one correspondence between the multiple windings 34 and the multiple teeth 33. Each winding 34 is formed by winding rectangular wire 4 in multiple layers around the outer circumferential surface of the corresponding tooth 33.
  • the rectangular wire 4 that constitutes each winding 34 does not have a uniform width over its entire length, but includes a portion of it that includes a plurality of first narrow portions 41 and a plurality of second narrow portions 42.
  • the plurality of first narrow portions 41 and the plurality of second narrow portions 42 included in the wire 4 are positioned alternately in the radial direction of the stator 3.
  • orthogonal as used in this disclosure is not limited to a state in which the angle between two objects is exactly 90 degrees, but also includes a state in which the angle between two objects is within an error range centered on 90 degrees (for example, within a range of 80 degrees to 100 degrees).
  • FIG. 1 Details Hereinafter, the motor 1 according to one embodiment will be described in detail with reference to FIGS. 1 to 7.
  • FIG. 1 is a diagrammatic representation of the motor 1 according to one embodiment.
  • the motor 1 is, for example, an inner rotor type brushless motor in which the rotor 2 is disposed inside the stator 3.
  • the motor 1 is driven by, for example, three-phase AC current (specifically, U-phase, V-phase, and W-phase) that are out of phase with each other by 120 degrees.
  • the motor 1 includes a rotor 2 and a stator 3. It is preferable that the motor 1 further includes a casing that houses the rotor 2 and the stator 3.
  • the rotor 2 includes the rotating shaft 21, the rotor yoke 22, and a plurality of magnets 23.
  • the rotor yoke 22 is formed, for example, by stacking multiple non-oriented magnetic steel plates in the axial direction of the rotor 2.
  • the rotor yoke 22 may be formed of iron, silicon steel, permalloy, ferrite, or the like.
  • the rotating shaft 21 is inserted into a central hole in the rotor yoke 22.
  • the rotating shaft 21 and the rotor yoke 22 are fixed to each other.
  • the rotor yoke 22 is configured to be rotatable around the axis C1 together with the rotating shaft 21.
  • the rotor 2 is a surface magnet type rotor.
  • a plurality of magnets 23 are attached to the outer surface of the rotor yoke 22 so as to be arranged at equal intervals in the circumferential direction of the rotor 2.
  • ten magnets 23 are attached at equal intervals to the outer peripheral surface of the rotor yoke 22.
  • Each of the multiple magnets 23 is a permanent magnet having, for example, a rectangular parallelepiped shape.
  • Each of the multiple magnets 23 is, for example, a neodymium magnet.
  • the multiple magnets 23 are arranged on the outer surface of the rotor yoke 22 so that the magnetic poles are arranged alternately in the circumferential direction of the rotor 2.
  • the stator 3 has a stator core 31 and a plurality of windings 34 .
  • the stator core 31 is composed of the above-mentioned stator yoke 32 and a number of teeth 33.
  • the stator yoke 32 has a cylindrical shape.
  • the stator yoke 32 is formed, for example, by stacking multiple non-oriented magnetic steel plates in the axial direction of the stator 3.
  • the stator yoke 32 is arranged concentrically with the rotor 2. In other words, the central axis of the cylindrical stator yoke 32 coincides with the axis C1 of the rotating shaft 21 of the rotor 2.
  • a number of teeth 33 protrude radially inward from the inner peripheral surface of the stator yoke 32.
  • the teeth 33 are spaced apart from one another in the circumferential direction of the stator 3.
  • the teeth 33 protrude toward the rotor 2 so as to be arranged at equal intervals in the circumferential direction of the stator 3.
  • Each of the teeth 33 is fixed to the stator yoke 32, for example, by fitting a portion of the tooth 33 into a groove provided in the stator yoke 32.
  • the teeth 33 and the stator yoke 32 are formed separately, but the teeth 33 and the stator yoke 32 may be formed integrally.
  • Each of the multiple teeth 33 faces the rotor yoke 22 via a gap in the radial direction of the stator 3.
  • a winding 34 is wound spirally around each of the multiple teeth 33 via an insulating insulator.
  • twelve teeth 33 are arranged at equal intervals on the inner peripheral surface of the stator yoke 32.
  • a winding 34 is wound around each of the twelve teeth 33.
  • the twelve windings 34 are divided into three groups corresponding to the above-mentioned three phases. Each of the three groups includes four windings 34 arranged at equal intervals in the circumferential direction of the rotor yoke 22.
  • the windings 34 are formed by winding rectangular wire material 4 made of, for example, copper or a copper alloy in multiple layers.
  • the windings 34 are, for example, edgewise windings.
  • the rectangular wire material 4 is, in other words, a rectangular wire.
  • Each of the multiple windings 34 includes coil end portions E1, E2 (see Figures 4 and 5).
  • Coil end portions E1, E2 are portions of the windings 34 that protrude outward from the stator core 31 when the windings 34 are viewed in the radial direction of the stator 3.
  • the coil end portions E1 and E2 are located on opposite sides of each other in the axial direction of the stator 3.
  • the coil end portions E1 and E2 include a first coil end portion E1 that is located protruding from the stator core 31 to a first axial side, and a second coil end portion E2 that is located protruding from the stator core 31 to a second axial side.
  • the first and second coil end portions E1 and E2 are located parallel to each other.
  • the first and second coil end portions E1, E2 are the portions of each winding 34 that do not contribute to the generation of an effective magnetic field for rotating the rotor 2.
  • does not contribute includes not only cases where they do not contribute in the strict sense, but also cases where they can be considered to have no substantial contribution.
  • a plurality of first narrow portions 41 and a plurality of second narrow portions 42 are provided in each of the first and second coil end portions E1, E2.
  • the plurality of first narrow portions 41 and the plurality of second narrow portions 42 are alternately positioned one by one in the radial direction of the stator 3.
  • the plurality of first narrow portions 41 and the plurality of second narrow portions 42 are provided only in the first and second coil end portions E1, E2.
  • Each of the multiple first narrow portions 41 is formed narrower than the surrounding areas by providing a first notch 410 in the rectangular wire 4.
  • the first notch 410 is provided on the edge portion closer to the corresponding tooth 33 when the wire 4 is wound around the corresponding tooth 33.
  • the first notch 410 has a shape cut out from the edge of the wire 4 closer to the corresponding tooth 33.
  • the first notch 410 is open towards the corresponding tooth 33.
  • the first notch 410 is a trapezoidal notch formed so that the further away it is from the corresponding tooth 33, the narrower it becomes.
  • the shape of the first notch 410 is not limited to this, and various shapes such as a rectangle and a triangle can be adopted. A trapezoid is included in a rectangle. Each shape such as a rectangle and a triangle is not limited in a strict geometric sense, and includes shapes that can be considered as such shapes.
  • the method for forming the first notch 410 in the wire 4 may be a punching process or a cutting process, and an appropriate method can be adopted.
  • Each of the multiple second narrow portions 42 is formed narrower than the other surrounding portions by providing a second notch 420 in the rectangular wire 4.
  • the second notch 420 is provided on the edge portion farther from the corresponding tooth 33 when the wire 4 is wound around the corresponding tooth 33.
  • the second notch 420 has a shape cut out from the edge of the wire 4 farther from the corresponding tooth 33.
  • the second notch 420 is open in a direction away from the corresponding tooth 33.
  • the first notch 410 and the second notch 420 are open in opposite directions.
  • the second notch 420 is a trapezoidal notch formed so that the closer to the corresponding tooth 33 the narrower the portion is.
  • the shape of the second notch 420 is not limited to this, and various shapes such as a rectangle and a triangle can be adopted. A trapezoid is included in a rectangle. Each shape such as a rectangle and a triangle is not limited in a strict geometric sense, and includes shapes that can be considered as such.
  • the method for forming the second notch 420 in the wire 4 may be a punching process or a cutting process, and an appropriate method can be adopted.
  • the first notch 410 and the second notch 420 are formed in the middle of the first coil end portion E1.
  • the first notch 410 and the second notch 420 in the first coil end portion E1 are not formed over the entire length of the first coil end portion E1.
  • the first notch 410 and the second notch 420 are formed in the middle of the second coil end portion E2.
  • the first notch 410 and the second notch 420 in the second coil end portion E2 are not formed over the entire length of the second coil end portion E2.
  • Each of the first and second coil end portions E1, E2 has multiple layers L1-L11 that overlap each other in the protruding direction of the corresponding tooth 33. These multiple layers L1-L11 are formed from a portion of the wire 4 that is wound in multiple layers around the corresponding tooth 33. In the first and second coil end portions E1, E2, both end edges of the multiple overlapping layers L1-L11 are aligned.
  • the multiple layers L1-L11 are, for example, 11 layers L1-L11.
  • the first end 401 and the second end 402 constituting both ends of the wire 4 are pulled out to the same axial side of the stator 3. In other words, the direction in which the first end 401 of the wire 4 is pulled out is the same as the direction in which the second end 402 of the wire 4 is pulled out.
  • the first end 401 and the second end 402 are positioned parallel to each other.
  • the first narrow portion 41A is located at the innermost position in the radial direction.
  • the first narrow portion 41A is one of the multiple first narrow portions 41.
  • the first narrow portion 41A is located closest to the rotor 2.
  • a first narrow portion 41A is provided in the radially innermost layer L1 of the multiple layers L1-L11.
  • a second narrow portion 42 is provided in the radially second innermost layer L2 of the multiple layers L1-L11.
  • the first narrow portions 41 and the second narrow portions 42 are also provided alternately in the third and subsequent layers L3-L11.
  • the second end 402 is drawn out from the radially outermost layer L11 in the first coil end portion E1.
  • a plurality of first narrow portions 41 and a plurality of second narrow portions 42 are alternately provided so as to be located in layers L1-L10 excluding the outermost layer L11 among the plurality of overlapping layers L1-L11.
  • a plurality of first narrow portions 41 and a plurality of second narrow portions 42 are alternately provided so as to be located in all of the plurality of overlapping layers L1-L11.
  • each of the first and second coil end portions E1, E2 is provided with a plurality of first notches 410 and a plurality of second notches 420 that are alternately positioned.
  • the first notch 410A is located at the innermost position in the radial direction.
  • the first notch 410A is one of the first notches 410 included in the plurality of first notches 410.
  • the first notch 410A is located closest to the rotor 2.
  • a plurality of first notches 410 and a plurality of second notches 420 are provided alternately in a plurality of overlapping layers L1-L11 of each of the first and second coil end portions E1, E2.
  • a first notch 410A is provided in the radially innermost layer L1 of the plurality of layers L1-L11.
  • a second notch 420 is provided in the radially second innermost layer L2 of the plurality of layers L1-L11.
  • a plurality of first notches 410 and a plurality of second notches 420 are also provided alternately in the third and subsequent layers L3-L11.
  • first notches 410 and a plurality of second notches 420 are alternately provided so as to be located in layers L1-L10 excluding the outermost layer L11 of the plurality of overlapping layers L1-L11.
  • second coil end portion E2 a plurality of first notches 410 and a plurality of second notches 420 are alternately provided so as to be located in all of the plurality of overlapping layers L1-L11.
  • magnetic flux B1 emanating from magnet 23A is swept, for example, by tooth 33A, passes through stator yoke 32, and returns to magnet 23A from adjacent tooth 33B.
  • the magnetic flux B1 flowing in this manner constitutes the main magnetic flux that rotates rotor 2.
  • the magnetic flux emanating from magnet 23A includes leakage flux in addition to the main magnetic flux.
  • Leakage flux is magnetic flux that leaks out from stator core 31.
  • This leakage flux interlinks with winding 34 wound around tooth 33A or 33B, eddy currents are generated in winding 34, and eddy current loss occurs according to this current.
  • the eddy current loss becomes heat and can lead to an increase in the temperature of winding 34. It can also lead to a decrease in the efficiency of motor 1.
  • rectangular wire is used as the wire 4 of the windings 34 to improve the space factor and reduce the DC resistance of the windings 34.
  • the wire 4 is rectangular, the range of interlinkage with the leakage flux is larger than when the wire 4 is twisted or round, and eddy currents may increase.
  • multiple first narrow portions 41 and multiple second narrow portions 42 are provided alternately on each of the first and second coil end portions E1, E2 of the windings 34. Therefore, in one embodiment, eddy current loss can be reduced by the mechanism described below.
  • a winding 34 formed of a wire 4 having a uniform width i.e., a wire 4 that does not have a plurality of first narrow portions 41 and a plurality of second narrow portions 42
  • a winding 34 formed of a wire 4 of one embodiment i.e., a wire 4 that has a plurality of first narrow portions 41 and a plurality of second narrow portions 42
  • a winding 34 formed of a wire 4 of one embodiment i.e., a wire 4 that has a plurality of first narrow portions 41 and a plurality of second narrow portions 42
  • the direction of the magnetic flux generated by the current flowing through each layer L1-L11 of the winding 34 is as shown by the arrows in FIG. 7, causing cancellation of the magnetic flux between adjacent layers.
  • current concentration due to the proximity effect is suppressed between adjacent layers of the winding 34 in one embodiment. Therefore, in the motor 1 of one embodiment, eddy current loss in each layer L1-11 is suppressed.
  • each first narrow portion 41 in the wire 4 is A1
  • the width dimension of each second narrow portion 42 is A2
  • the width dimension of the portion of the wire 4 excluding the first narrow portion 41 and the second narrow portion 42 is B
  • the value of A1/B is in the range of 0.375 to 0.75
  • the value of A2/B is in the range of 0.375 to 0.75.
  • the eddy current loss is 174.2 mW.
  • the eddy current loss is 132.4 mW.
  • the eddy current loss is 119.9 mW.
  • the eddy current loss is 172.2 mW.
  • Modification 1 8 shows a winding 34 of Modification 1.
  • first coil end portion E1 of this winding 34 a plurality of first narrow portions 41 and a plurality of second narrow portions 42 are provided alternately on layers L1-L8 including the innermost layer L1 among a plurality of overlapping layers L1-L11.
  • the other layers are not provided with the first narrow portions 41 or the second narrow portions 42.
  • the same is true for the second coil end portion E2.
  • the number of layers on which the plurality of first narrow portions 41 and the plurality of second narrow portions 42 are provided may be four or more, and is not particularly limited.
  • Modification 2 9 shows the winding 34 of Modification 2.
  • two portions S1, S2 of the winding 34 excluding the first and second coil end portions E1, E2 are each provided with a plurality of first narrow portions 41 and a plurality of second narrow portions 42 that are positioned alternately in the radial direction of the stator 3.
  • the portions S1, S2 are portions that are positioned to overlap with the stator core 31 when viewed in the radial direction of the stator 3.
  • Each of the sections S1 and S2 has multiple layers L1-L11 that overlap each other in the protruding direction of the corresponding teeth 33. These multiple layers L1-L11 are formed as part of the wire 4 that is wound in multiple layers. In the sections S1 and S2, both end edges of the multiple overlapping layers L1-L11 are aligned.
  • the portions S1 and S2 connect the first and second coil end portions E1 and E2.
  • the portions S1 and S2 are positioned parallel to each other.
  • the winding 34 which includes the first and second coil end portions E1 and E2 and the portions S1 and S2, has a rectangular outer shape when viewed in the radial direction of the stator 3.
  • one first narrow portion 41A included in the multiple first narrow portions 41 is located at the innermost radial position of the stator 3 (i.e., closest to the rotor 2).
  • Each of the portions S1 and S2 of the winding 34 is provided with a plurality of first notches 410 and a plurality of second notches 420 that are alternately positioned in the radial direction of the stator 3.
  • one first notch 410A included in the plurality of first notches 410 is located at the innermost position in the radial direction of the stator 3 (i.e., closest to the rotor 2).
  • the effect of reducing eddy current loss is obtained.
  • the multiple first narrow portions 41 and multiple second narrow portions 42 that are alternately positioned are provided in both portions S1 and S2, but they may be provided in only one of portions S1 and S2.
  • the first narrow portion 41 and the second narrow portion 42 are arranged alternately, but this is not limited thereto, and for example, they may be arranged alternately. Also, one first narrow portion 41 and multiple second narrow portions 42 may be arranged alternately, or multiple first narrow portions 41 and one second narrow portion 42 may be arranged alternately, and these arrangements can be changed as appropriate. Any of the above arrangement patterns is included in the various arrangement patterns of the multiple first narrow portions 41 and multiple second narrow portions 42 that are arranged alternately.
  • the width dimension A1 of the multiple first narrow portions 41 is uniform, and the width dimension A2 of the multiple second narrow portions 42 is uniform, but it is not essential that they are uniform.
  • the width dimension A1 of each first narrow portion 41 may be set so that the width dimension A2 of each second narrow portion 42 is smaller the more radially outwardly located among the multiple first narrow portions 41.
  • the width dimension A2 of each second narrow portion 42 may be set so that the width dimension A1 of each first narrow portion 41 is smaller the more radially outwardly located among the multiple second narrow portions 42.
  • the width dimension A1 of each first narrow portion 41 and the width dimension A2 of each second narrow portion 42 can be changed as appropriate.
  • the motor (1) of the first aspect includes a rotor (2) and a stator (3) having a radial direction, a circumferential direction, and an axial direction.
  • the rotor (2) includes a rotor yoke (22) and a plurality of magnets (23) arranged on the outer peripheral surface of the rotor yoke (22).
  • the stator (3) includes a stator core (31) having a plurality of teeth (33) positioned at a distance from each other in the circumferential direction and protruding inward in the radial direction, and a plurality of windings (34) wound around the plurality of teeth (33).
  • Each of the plurality of windings (34) is formed by winding a rectangular wire material (4) around a corresponding one of the plurality of teeth (33).
  • the wire material (4) constituting each winding (34) includes a plurality of first narrow portions (41) and a plurality of second narrow portions (42) positioned alternately in the radial direction.
  • Each of the first narrow portions (41) is a portion formed narrower by providing a first notch (410) on a side of the wire (4) closer to the corresponding tooth (33).
  • Each of the second narrow portions (42) is a portion formed narrower by providing a second notch (420) on a side of the wire (4) farther from the corresponding tooth (33).
  • the multiple first narrow portions (41) and multiple second narrow portions (42) are arranged alternately in each winding (34), thereby canceling out the magnetic flux in each winding (34).
  • eddy current loss occurring in the winding (34) can be effectively reduced without being required to satisfy conditions such as frequency range, as in the prior art.
  • the width dimension of each first narrow portion (41) in the first embodiment is A1
  • the width dimension of each second narrow portion (42) is A2
  • the width dimension of the portion of the wire (4) excluding the first narrow portion (41) and the second narrow portion (42) is B
  • the value of A1/B is within the range of 0.375 to 0.75
  • the value of A2/B is within the range of 0.375 to 0.75.
  • the eddy current loss occurring in the winding (34) can be effectively reduced.
  • one first narrow portion (41) included in the multiple first narrow portions (41) is located at the innermost position in the radial direction.
  • the first notch (410) can be arranged at a position where the leakage magnetic flux has a large effect, and therefore, the eddy current loss occurring in the winding (34) can be effectively reduced.
  • each winding (34) includes a coil end portion (E1, E2) that is positioned protruding from the stator core (31) when viewed in the radial direction.
  • a plurality of first narrow portions (41) and a plurality of second narrow portions (42) that are alternately positioned are provided in the coil end portion (E1, E2).
  • the coil end portion (E1, E2) has a plurality of layers (L1-L11) overlapping in the radial direction.
  • One first narrow portion (41) included in the plurality of first narrow portions (41) is provided in the radially innermost layer (L1) of the plurality of layers (L1-L11).
  • the first notch (410) can be arranged at a position where the leakage magnetic flux has a large effect, and therefore, the eddy current loss occurring in the winding (34) can be effectively reduced.
  • the motor (1) of the sixth aspect is any one of the first to third aspects, and each winding (34) includes a first coil end portion (E1) and a second coil end portion (E2) that are positioned protruding from the stator core (31) when viewed in the radial direction.
  • a plurality of first narrow portions (41) and a plurality of second narrow portions (42) that are alternately positioned are provided in each of the first coil end portion (E1) and the second coil end portion (E2).
  • each of the first coil end portion (E1) and the second coil end portion (E2) has a plurality of layers (L1-L11) that overlap each other in the radial direction.
  • One first narrow portion (41) included in the plurality of first narrow portions (41) is provided in the radially innermost layer (L1) of the plurality of layers (L1-L11).
  • the first notch (410) can be arranged at a position where the leakage magnetic flux has a large effect, and therefore, the eddy current loss occurring in the winding (34) can be effectively reduced.
  • each winding (34) includes a portion (S1, S2) that overlaps with the stator core (31) when viewed in the radial direction.
  • a plurality of first narrow portions (41) and a plurality of second narrow portions (42) that are alternately positioned are provided in this portion (S1, S2).
  • This embodiment also effectively reduces eddy current losses that occur in the winding (34).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
PCT/JP2024/010292 2023-03-23 2024-03-15 モータ Ceased WO2024195734A1 (ja)

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CN202480006906.6A CN120530557A (zh) 2023-03-23 2024-03-15 马达
JP2025508403A JPWO2024195734A1 (https=) 2023-03-23 2024-03-15

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JP2023-047327 2023-03-23
JP2023047327 2023-03-23

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717238U (https=) * 1980-06-25 1982-01-28
JP2005304244A (ja) * 2004-04-15 2005-10-27 Toyota Motor Corp 回転電機のコイル、回転電機およびコイルの製造方法
WO2020017143A1 (ja) * 2018-07-18 2020-01-23 パナソニックＩｐマネジメント株式会社 モータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717238U (https=) * 1980-06-25 1982-01-28
JP2005304244A (ja) * 2004-04-15 2005-10-27 Toyota Motor Corp 回転電機のコイル、回転電機およびコイルの製造方法
WO2020017143A1 (ja) * 2018-07-18 2020-01-23 パナソニックＩｐマネジメント株式会社 モータ

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