WO2023276094A1 - 回転電機 - Google Patents

回転電機 Download PDF

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Publication number
WO2023276094A1
WO2023276094A1 PCT/JP2021/024892 JP2021024892W WO2023276094A1 WO 2023276094 A1 WO2023276094 A1 WO 2023276094A1 JP 2021024892 W JP2021024892 W JP 2021024892W WO 2023276094 A1 WO2023276094 A1 WO 2023276094A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulator
stator core
coil
coil end
central axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/024892
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
亮太 森本
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.)
DMG Mori Co Ltd
Original Assignee
DMG Mori 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 DMG Mori Co Ltd filed Critical DMG Mori Co Ltd
Priority to EP21948398.9A priority Critical patent/EP4366139A4/en
Priority to JP2023531279A priority patent/JPWO2023276094A1/ja
Priority to CN202180100045.4A priority patent/CN117616669A/zh
Priority to US18/572,667 priority patent/US20240396394A1/en
Priority to PCT/JP2021/024892 priority patent/WO2023276094A1/ja
Publication of WO2023276094A1 publication Critical patent/WO2023276094A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation 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
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets

Definitions

  • This invention relates to a rotating electric machine.
  • Patent Document 1 discloses a motor including a stator core, coil ends drawn out from slots in the stator core, and interphase insulating paper for insulating the base of the coil ends. disclosed.
  • Patent Document 1 a configuration is known in which an insulator such as an insulating paper is used to insulate coil ends of different phases from each other.
  • an insulator such as an insulating paper is used to insulate coil ends of different phases from each other.
  • the coil ends of different phases are wired while being close to each other on the end surface of the stator core. Therefore, when the insulator is assembled to the coil ends, the insulator may not be inserted to an appropriate position between the coil ends, and reliable insulation may not be achieved.
  • an object of the present invention is to solve the above problems, and to provide a rotating electric machine that can reliably insulate coil ends of different phases from each other.
  • a rotating electrical machine includes an annular yoke portion and a plurality of tooth portions extending radially from the yoke portion and provided at intervals in the circumferential direction.
  • a stator core forming a slot therebetween; and a first coil end and a second coil end arranged adjacent to each other on an end surface of the stator core in the axial direction thereof and formed of coils of mutually different phases; a three-phase coil wound around a part; a slot arranged in the slot and projecting from the slot onto the end surface of the stator core; Out of the three-phase coils, the second coil wound around the tooth portion is disposed at a position displaced in the circumferential direction from the first coil, and the outer space is located radially outside of the stator core relative to the inner space. and a second insulator interposed between the first coil end and the second coil end and partially overlapping the first insulator when viewed in the radial direction of the stator core Prepare the body.
  • the second insulator is provided so as to partially overlap the first insulator when viewed in the radial direction of the stator core. It is possible to reliably insulate between the first coil end and the second coil end.
  • each coil end of the first coil end and the second coil end includes a root portion arranged directly above the opening formed by the slot in the end face of the stator core.
  • the rotating electric machine further includes a third insulator covering the root portion. The length of the first insulator in the axial direction of the stator core on the end face of the stator core is greater than the length of the third insulator in the axial direction of the stator core on the end face of the stator core.
  • the second insulator can be easily provided so as to partially overlap the first insulator when viewed in the radial direction of the stator core. Therefore, it is possible to improve workability when arranging the second insulator between the first coil end and the second coil end.
  • the second insulator is made of insulating paper. According to the rotating electric machine configured in this way, even if the second insulator is made of insulating paper that is easily deformed when placed between the first coil end and the second coil end, the first coil It is possible to reliably insulate between the end and the second coil end.
  • each of the first coil end and the second coil end extends in the circumferential direction and radial direction of the stator core when viewed in the axial direction of the stator core.
  • the length of the section in which the first coil end and the second coil end extend adjacent to each other increases the length of the second insulator between the first coil end and the second coil end. Even if the work of arranging the coil ends becomes difficult, the insulation between the first coil end and the second coil end can be ensured.
  • FIG. 1 is a perspective view showing a motor in an embodiment of the invention
  • FIG. FIG. 2 is a sectional view showing the motor in FIG. 1
  • FIG. 2 is a perspective view showing a motor from which a flange, resin sealing portion and wiring are removed from the motor in FIG. 1
  • FIG. 2 is a perspective view for explaining the arrangement of insulators in the motor of FIG. 1
  • FIG. 5 is a perspective view showing a motor in a range surrounded by a two-dot chain line V in FIG. 4
  • FIG. 6 is a perspective view showing the motor viewed in the direction of arrows on line VI-VI in FIG. 5
  • FIG. 2 is a diagram for explaining a mounting state of a coil in the motor in FIG.
  • FIG. 1; 2 is a diagram for explaining the arrangement of a second insulator in the motor of FIG. 1;
  • FIG. FIG. 9 is a perspective view showing the motor viewed in the direction indicated by arrow IX in FIG. 8;
  • FIG. 9 is a perspective view showing the motor viewed in the direction indicated by arrow IX in FIG. 8;
  • FIG. 8 is a cross-sectional view showing the motor as viewed in the direction of arrows on line XI-XI in FIG. 7;
  • 2 is a diagram schematically showing an insulation state between a first coil end and a second coil end in the motor shown in FIG. 1;
  • FIG. FIG. 5 is a diagram schematically showing an insulation state between a first coil end and a second coil end in a motor in a comparative example;
  • FIG. 1 is a perspective view showing a motor according to an embodiment of the invention.
  • 2 is a sectional view showing the motor in FIG. 1.
  • FIG. 1 is a perspective view showing a motor according to an embodiment of the invention.
  • motor 100 in the present embodiment is for machine tools.
  • a motor 100 is incorporated in a work spindle and used as a motor for rotating a work held on the work spindle.
  • the motor 100 has a rotor (not shown) and a stator 20 arranged with a gap on the outer circumference of the rotor.
  • the rotor is rotationally driven around a central axis 101 shown as a phantom line.
  • FIG. 3 is a perspective view showing the motor in which the flange, the resin sealing portion and the wiring (lead wire 16 and connecting wire 17 in FIG. 2) are removed from the motor in FIG.
  • the stator 20 has a stator core 21, a flange 12, three-phase coils 31 (31U, 31V, 31W), and a resin sealing portion 14.
  • the stator core 21 is made of a magnetic material.
  • Stator core 21 as a whole has a cylindrical shape centered on central axis 101 .
  • the circumferential direction of central shaft 101 corresponds to the circumferential direction of stator core 21
  • the axial direction of central shaft 101 corresponds to the axial direction of stator core 21
  • the radial direction of central shaft 101 corresponds to the radial direction of stator core 21 .
  • the length of stator core 21 in the axial direction of center axis 101 may be greater than the diameter of stator core 21 centered on center axis 101 or may be less than or equal to the diameter of stator core 21 centered on center axis 101 . .
  • the stator core 21 has end faces 26 (26m, 26n). End surface 26 is arranged at the end of stator core 21 in the axial direction of central axis 101 . End face 26 extends in a plane orthogonal to central axis 101 . End face 26m and end face 26n are arranged at one end and the other end of stator core 21 in the axial direction of central axis 101, respectively.
  • the stator core 21 has a yoke portion 22 and a plurality of teeth portions 23 as its component parts.
  • the yoke portion 22 has a shape that circles around the central axis 101 .
  • Yoke portion 22 has a cylindrical shape centered on central axis 101 .
  • Teeth portion 23 extends radially inward of central axis 101 from yoke portion 22 .
  • Teeth portion 23 faces the rotor with a gap at the tip extending from yoke portion 22 .
  • a plurality of teeth portions 23 are provided at intervals in the circumferential direction of central axis 101 .
  • Slots 24 are formed between the tooth portions 23 adjacent to each other in the circumferential direction.
  • the flange 12 has a cylindrical shape centering on the central axis 101 as a whole.
  • Flange 12 is made of metal.
  • a stator core 21 is fitted inside the flange 12 .
  • the flange 12 has a refrigerant passage forming portion 13 and a flange portion 15 as its constituent parts.
  • the coolant passage forming portion 13 is provided on the outer peripheral surface of the flange 12 .
  • the coolant passage forming portion 13 forms, together with a tubular member (not shown) arranged on the outer periphery of the flange 12, a coolant passage through which a coolant such as cooling water or cooling oil can flow.
  • the flange portion 15 is provided to spread like a flange at the end portion of the flange 12 in the axial direction of the central axis 101 .
  • a bolt insertion hole for fixing the motor 100 is formed in the flange portion 15 .
  • the three-phase coil 31 is provided in the stator core 21.
  • the three-phase coil 31 is inserted through the slot 24 .
  • the three-phase coil 31 is wound around the tooth portion 23 .
  • the three-phase coil 31 consists of a U-phase coil 31U, a V-phase coil 31V and a W-phase coil 31W.
  • Each coil of U-phase coil 31U, V-phase coil 31V, and W-phase coil 31W is composed of multiple bundled conductive wires (for example, copper wires).
  • Each coil of the U-phase coil 31U, the V-phase coil 31V, and the W-phase coil 31W is wound around the tooth portion 23 by distributed winding.
  • Each of the U-phase coil 31U, the V-phase coil 31V, and the W-phase coil 31W is provided so as to straddle at least one slot 24 .
  • Each coil of the U-phase coil 31U, the V-phase coil 31V and the W-phase coil 31W passes through two slots 24 located apart in the circumferential direction of the stator core 21 and the end faces 26 (26m, 26n). It is wound around the portion 23 .
  • Each coil of the U-phase coil 31U, the V-phase coil 31V, and the W-phase coil 31W extends linearly along the axial direction of the central axis 101 within the slot 24 .
  • each of the U-phase coil 31U, the V-phase coil 31V, and the W-phase coil 31W extends on the end surface 26 in a substantially U-shape.
  • each coil of U-phase coil 31U, V-phase coil 31V, and W-phase coil 31W extends around central axis 101 on end surface 26. direction and the radial direction of the central axis 101 .
  • Two sets of coils selected from U-phase coil 31U, V-phase coil 31V, and W-phase coil 31W are arranged in each slot 24 in the radial direction of central axis 101 .
  • the two sets of coils arranged in each slot 24 may be coils of the same phase, or may be coils of different phases.
  • a coil end portion 36 is configured by the three-phase coils 31 (31U, 31V, 31W) passing over the end face 26 .
  • the coil end portion 36 protrudes from the slot 24 onto the end surface 26 in the axial direction of the central axis 101 .
  • the coil end portion 36 has a root portion 37 .
  • Root portion 37 is located directly above the opening formed by slot 24 in end face 26 of stator core 21 .
  • the root portion 37 extends from the slot 24 along the axial direction of the central axis 101 .
  • the resin sealing portion 14 is made of a resin material.
  • the resin sealing portion 14 is provided so as to fill the slot 24 .
  • the resin sealing portion 14 is provided on the end face 26 so as to cover the coil end portion 36 .
  • FIG. 4 is a perspective view for explaining the arrangement of insulators in the motor in FIG.
  • FIG. 5 is a perspective view showing a motor in a range surrounded by a two-dot chain line V in FIG. 4.
  • FIG. 6 is a perspective view showing the motor viewed in the direction of arrows on the line VI-VI in FIG. 5.
  • FIGS. 5 and 6 show an arbitrary tooth portion 23P among the plurality of tooth portions 23 and a tooth portion 23Q arranged along the circumferential direction of the central axis 101 with the tooth portion 23P.
  • the tooth portion 23P has a first wall portion 24p.
  • the tooth portion 23Q has a second wall portion 24q.
  • the first wall portion 24p and the second wall portion 24q are formed of side surfaces of the teeth portion 23 facing in the circumferential direction of the central axis 101 .
  • the yoke portion 22 has a third wall portion 24r.
  • the third wall portion 24r is formed of the inner peripheral surface of the yoke portion 22 facing radially inward of the central axis 101 .
  • One end of the third wall portion 24r in the circumferential direction of the center shaft 101 is continuous with the end portion of the first wall portion 24p on the radially outer side of the center shaft 101 .
  • the other end of the third wall portion 24r in the circumferential direction of the center shaft 101 is connected to the end portion of the second wall portion 24q on the radially outer side of the center shaft 101 .
  • the slot 24 is defined between the first wall portion 24p and the second wall portion 24q in the circumferential direction of the central axis 101 and at a position facing the third wall portion 24r in the radial direction of the central axis 101.
  • the motor 100 further has a first insulator 48 , a second insulator 51 , a third insulator 41 and a fourth insulator 46 .
  • the first insulator 48, the second insulator 51, the third insulator 41 and the fourth insulator 46 are made of flexible sheet bodies.
  • the first insulator 48, the second insulator 51, the third insulator 41 and the fourth insulator 46 are made of insulating paper.
  • the third insulator 41 is arranged in the slot 24 .
  • the third insulator 41 is provided in the slot 24 so as to cover the first wall portion 24p, the second wall portion 24q and the third wall portion 24r.
  • the third insulator 41 opens radially inward of the central axis 101 .
  • the third insulator 41 extends in the axial direction of the central axis 101 .
  • the third insulator 41 protrudes from the slot 24 onto the end surface 26 (26m, 26n) of the stator core 21 .
  • the third insulator 41 is provided on the end surface 26 so as to cover the base portion 37 of the coil end portion 36 .
  • the third insulator 41 has a projecting end 42 .
  • the projecting end 42 corresponds to the tip portion of the third insulator 41 projecting from the slot 24 onto the end surface 26 .
  • the third insulator 41 is folded back by 180° at the tip portion (protruding end 42 ) protruding from the end face 26 .
  • the third insulator 41 is double layered on the end surface 26 .
  • the third insulator 41 secures the distance between the end surface 26 of the stator core 21 and the coil end portion 36 in the axial direction of the central axis 101 .
  • a fourth insulator 46 is arranged in the slot 24 .
  • the fourth insulator 46 is provided so as to close the opening of the third insulator 41 that opens radially inward of the central axis 101 .
  • the fourth insulator 46 extends along the circumferential direction of the central axis 101 .
  • the fourth insulator 46 continues to the third insulator 41 covering the first wall portion 24p and the third insulator 41 covering the second wall portion 24q at both ends in the circumferential direction of the central axis 101, respectively.
  • the fourth insulator 46 extends in the axial direction of the central axis 101 .
  • the fourth insulator 46 protrudes from the slot 24 onto the end surface 26 (26m, 26n) of the stator core 21 .
  • the length of the fourth insulator 46 in the axial direction of the central axis 101 on the end surface 26 of the stator core 21 is equal to the length of the third insulator 41 in the axial direction of the central axis 101 on the end surface 26 of the stator core 21 .
  • the fourth insulator 46 defines the space inside the slot 24 radially inside the central axis 101 .
  • the fourth insulator 46 prevents the three-phase coil 31 arranged in the slot 24 from protruding radially inward of the central axis 101 .
  • the first insulator 48 is arranged in the slot 24 .
  • the first insulator 48 divides the space inside the slot 24 into an inner peripheral space 61 and an outer peripheral space 62 .
  • the outer space 62 is located radially outside of the stator core 21 relative to the inner space 61 .
  • the inner peripheral space 61 is located between the third insulator 41 covering the first wall portion 24p and the third insulator 41 covering the second wall portion 24q in the circumferential direction of the central axis 101. , in the radial direction of the central axis 101 , at positions sandwiched between the fourth insulator 46 and the first insulator 48 .
  • the outer space 62 is located between the third insulator 41 covering the first wall portion 24p and the third insulator 41 covering the second wall portion 24q in the circumferential direction of the central axis 101. In the radial direction of the central axis 101, it is defined at a position sandwiched between the first insulator 48 and the third insulator 41 covering the third wall portion 24r.
  • the first insulator 48 extends in the axial direction of the central axis 101 .
  • the first insulator 48 protrudes from the slot 24 onto the end face 26 (26m, 26n) of the stator core 21 .
  • the first insulator 48 has a protruding end 49 .
  • the protruding end 49 corresponds to the tip portion of the first insulator 48 protruding from the slot 24 onto the end surface 26 .
  • the length of the first insulator 48 in the axial direction of the central axis 101 on the end surface 26 of the stator core 21 is equal to that of the central axis 101 on the end surface 26 of the stator core 21 is greater than the length (protrusion length L2) of the third insulator 41 in the axial direction (L1>L2).
  • the protruding length L1 is the length between the end surface 26 and the protruding end 49 of the first insulator 48 in the axial direction of the central axis 101 .
  • the protruding length L2 is the length between the end surface 26 and the protruding end 42 of the third insulator 41 in the axial direction of the central axis 101 .
  • the first insulator 48 insulates between the different-phase coils when coils of different phases are arranged in the inner peripheral space 61 and the outer peripheral space 62 .
  • FIG. 7 is a diagram for explaining the mounted state of the coils in the motor in FIG.
  • FIG. 7 schematically shows the end surface 26 of the stator core 21 that is linearly developed and the three-phase coils 31 (coil end portions 36) arranged on the end surface 26.
  • the U-phase coil 31U is indicated by a dotted line
  • the V-phase coil 31V is indicated by a two-dot chain line
  • the W-phase coil 31W is indicated by a one-dot chain line.
  • U-phase coil 31U, V-phase coil 31V and W-phase coil 31W are provided so as to straddle four slots 24 in the circumferential direction of central axis 101.
  • Two sets of U-phase coils 31U are arranged continuously in the circumferential direction of central axis 101, two sets of V-phase coils 31V are arranged consecutively in the circumferential direction of central axis 101, and two sets of W-phase coils 31W are arranged in series. , are arranged continuously in the circumferential direction of the central axis 101 .
  • These two sets of U-phase coils 31U, two sets of V-phase coils 31V, and two sets of W-phase coils 31W are arranged repeatedly in the circumferential direction of central axis 101 in the order listed.
  • a first coil and a second coil which are wound around the teeth 23, are arranged at positions shifted from each other in the circumferential direction of the central axis 101, respectively.
  • a V-phase coil 31V is arranged as a coil. Between the W-phase coil 31W arranged in the inner peripheral space 61 and the V-phase coil 31V arranged in the outer peripheral space 62, the positions of the plurality of teeth 23 around which the respective coils are wound are set at four positions. Only the tooth portion 23 is shifted.
  • the combination of the first coil arranged in the inner peripheral space 61 and the second coil arranged in the outer peripheral space 62 is not limited to the above-described out-of-phase coils, but may also be in-phase coils. obtain.
  • the three-phase coil 31 (coil end portion 36) includes a first coil end 36A and a second coil end 36B.
  • the first coil end 36A and the second coil end 36B are composed of coils of different phases.
  • first coil end 36A and the second coil end 36B are arranged adjacent to each other in the circumferential direction of the central axis 101.
  • the first coil ends 36A and the second coil ends 36B are arranged alternately in the circumferential direction of the central axis 101 .
  • each coil end of first coil end 36A and second coil end 36B is composed of a plurality of sets (two sets) of coils of the same phase.
  • FIG. 8 is a diagram for explaining the arrangement of the second insulator in the motor in FIG. 9 is a perspective view showing the motor viewed in the direction indicated by arrow IX in FIG. 8.
  • FIG. 10 is a perspective view showing the motor viewed in the direction indicated by arrow IX in FIG. 8.
  • FIG. 11 is a cross-sectional view showing the motor viewed in the direction of arrows on the line XI-XI in FIG. 7.
  • the second insulator 51 is provided on the end face 26 of the stator core 21. As shown in FIG. The second insulator 51 is interposed between the first coil end 36A and the second coil end 36B. The second insulator 51 extends in the circumferential direction and radial direction of the central shaft 101 when viewed in the axial direction of the central shaft 101 . When viewed in the axial direction of central axis 101 , second insulator 51 alternately traverses tooth portions 23 and openings formed by slots 24 in end surface 26 of stator core 21 . , extends between the yoke portion 22 and the tip portion of the tooth portion 23 .
  • the second insulator 51 provides insulation on the end surface 26 between the first coil end 36A and the second coil end 36B, which are coils of different phases.
  • the second insulator 51 is provided so as to partially overlap the first insulator 48 when viewed in the radial direction of the central axis 101. .
  • the second insulator 51 has a peripheral portion 52 .
  • Peripheral edge portion 52 faces end surface 26 of stator core 21 in the axial direction of central axis 101 .
  • the peripheral edge portion 52 is arranged between the projecting end 42 of the third insulator 41 and the projecting end 49 of the first insulator 48 in the axial direction of the central axis 101 .
  • the second insulator 51 may be in contact with the third insulator 41 (protruding end 42) or may be out of contact with the third insulator 41 (protruding end 42).
  • the length of overlap between the second insulator 51 and the first insulator 48 in the axial direction of the central axis 101 should be equal to or greater than the creepage distance between the first coil end 36A and the second coil end 36B required for the design of the motor 100. is preferred.
  • the overlapping length of the second insulator 51 and the first insulator 48 in the axial direction of the central axis 101 is, for example, 2 mm or more.
  • FIG. 12 is a diagram schematically showing the state of insulation between the first coil end and the second coil end in the motor in FIG.
  • FIG. 13 is a diagram schematically showing an insulation state between a first coil end and a second coil end in a motor according to a comparative example.
  • the second insulator 51 (peripheral edge portion 52) is arranged apart from the first insulator 48 in the axial direction of the central axis 101. As shown in FIG. In such a configuration, the second insulator 51 is not sufficiently inserted between the first coil end 36A and the second coil end 36B at the coil rising portion from the slot 24 . As a result, there arises a concern that a spatial distance without an insulator intervening between the first coil end 36A and the second coil end 36B or a creepage distance along the insulator may be reduced.
  • second insulator 51 is provided so as to partially overlap first insulator 48 when viewed in the radial direction of central axis 101 . It is With such a configuration, the insulating layer in which the first insulator 48 and the second insulator 51 are continuous is reliably formed between the first coil end 36A and the second coil end 36B at the rising portion of the coil from the slot 24. placed. This makes it possible to prevent a spatial distance from occurring between the first coil end 36A and the second coil end 36B and to ensure a sufficient creepage distance. The insulation between the coil ends 36B can be ensured.
  • the projection length L1 of the first insulator 48 on the end face 26 is longer than the projection length L2 of the third insulator 41 on the end face 26 .
  • the second insulator 51 is made of flexible insulating paper, and the first coil end 36A and the second coil end 36B are arranged adjacent to each other over a long section. , extending in the circumferential direction of the central axis and in the radial direction, it becomes difficult to provide the second insulator 51 so as to partially overlap the first insulator 48 .
  • the second insulator 51 is It is possible to improve workability when arranging between the first coil end 36A and the second coil end 36B.
  • the motor 100 as a rotating electric machine includes an annular yoke portion 22 and radially extending portions from the yoke portion 22 .
  • a stator core 21 including a plurality of tooth portions 23 protruding and provided at intervals in the circumferential direction and forming slots 24 between adjacent tooth portions 23;
  • a three-phase coil 31 including a first coil end 36A and a second coil end 36B, which are arranged adjacent to each other and composed of coils of mutually different phases, is inserted through the slot 24 and wound around the tooth portion 23, and the slot 24.
  • the space in the slot 24 is divided into an inner peripheral space 61 where the first coil of the three-phase coil 31 is arranged and a space 61 of the three-phase coil 31 , the second coil wound around the tooth portion 23 is arranged at a position displaced in the circumferential direction from the first coil, and is located radially outside of the stator core 21 relative to the inner peripheral space 61. It is interposed between the partitioning first insulator 48, the first coil end 36A and the second coil end 36B, and provided so as to partially overlap the first insulator 48 when viewed in the radial direction of the stator core 21. and a second insulator 51 .
  • the motor 100 configured in this way, it is possible to reliably insulate between the first coil end 36A and the second coil end 36B, which are coils of different phases.
  • the present invention may be applied to a motor built in a tool spindle for rotating a tool held by the tool spindle.
  • the present invention is not limited to motors and may be applied to generators.
  • This invention is applied, for example, to motors for machine tools.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
PCT/JP2021/024892 2021-07-01 2021-07-01 回転電機 Ceased WO2023276094A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP21948398.9A EP4366139A4 (en) 2021-07-01 2021-07-01 ROTATING ELECTRIC MACHINE
JP2023531279A JPWO2023276094A1 (https=) 2021-07-01 2021-07-01
CN202180100045.4A CN117616669A (zh) 2021-07-01 2021-07-01 旋转电机
US18/572,667 US20240396394A1 (en) 2021-07-01 2021-07-01 Rotating electric machine
PCT/JP2021/024892 WO2023276094A1 (ja) 2021-07-01 2021-07-01 回転電機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/024892 WO2023276094A1 (ja) 2021-07-01 2021-07-01 回転電機

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WO2023276094A1 true WO2023276094A1 (ja) 2023-01-05

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EP (1) EP4366139A4 (https=)
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CN (1) CN117616669A (https=)
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CN117616669A (zh) 2024-02-27

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