WO2020203294A1 - Stator et moteur électrique - Google Patents

Stator et moteur électrique Download PDF

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Publication number
WO2020203294A1
WO2020203294A1 PCT/JP2020/011979 JP2020011979W WO2020203294A1 WO 2020203294 A1 WO2020203294 A1 WO 2020203294A1 JP 2020011979 W JP2020011979 W JP 2020011979W WO 2020203294 A1 WO2020203294 A1 WO 2020203294A1
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WO
WIPO (PCT)
Prior art keywords
phase
crossover
stator
winding
phases
Prior art date
Application number
PCT/JP2020/011979
Other languages
English (en)
Japanese (ja)
Inventor
田邉　洋一
忠雄 松岡
智則 小嶋
雅樹 山田
颯馬 守屋
庸佑 松井
パーオブトン パッタラワディー
Original Assignee
株式会社富士通ゼネラル
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 株式会社富士通ゼネラル filed Critical 株式会社富士通ゼネラル
Priority to CN202080021578.9A priority Critical patent/CN113574773A/zh
Publication of WO2020203294A1 publication Critical patent/WO2020203294A1/fr

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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
    • H02K3/32—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 in which three-phase windings are wound around a plurality of teeth portions of a stator core, and an electric motor provided with the stator.
  • the insulator that insulates between the stator core and the winding is provided with a crossover holding portion that holds the crossover that connects the windings of the same phase.
  • a crossover wire accommodating groove formed in three stages in the central axis direction of the stator is provided in the crossover wire holding portion corresponding to each phase of the three-phase power supply.
  • an object of the present invention is to provide a stator capable of suppressing an increase in size of the stator in the central axis direction and an electric motor provided with the stator.
  • the stator includes a cylindrical stator core, three-phase windings, and an insulator.
  • the stator core has a plurality of tooth portions protruding inward in the radial direction.
  • the three-phase winding is wound around the plurality of teeth portions.
  • the insulator is arranged at the axial end of the stator core and insulates between the stator core and the three-phase windings.
  • the three-phase windings are bridged over the outer peripheral portion of the insulator with the first winding, the second winding, and the third winding corresponding to each phase, and connect the windings of the same phase to each other. Includes three phase crossovers drawn out to the outer peripheral side of the stator core.
  • the crossover of one of the three phases passes between the crossovers of the other two phases on the outer peripheral surface of the insulator. It has a crossover holding portion that holds the crossovers of the three phases so as to be crossed diagonally.
  • the crossover holding portion is a position where the crossovers of the other two phases are at different heights in the axial direction and do not overlap each other in the axial direction when viewed from the outer peripheral side of the insulator. May be held in.
  • the line length of the crossover of the one phase is typically longer than the line length of the crossover of the other two phases.
  • the crossover holding portion may hold the crossovers of the three phases so that all the crossovers of the three phases do not overlap in the axial direction when viewed from the outer peripheral side of the insulator.
  • the stator core includes a first pair of tooth portions in which the first winding is wound and adjacent to each other, and a second pair of tooth portions in which the second winding is wound and adjacent to each other. It may have a total of 12 tooth portions in which the third winding is wound and a pair of third tooth portions adjacent to each other are arranged in order. In this case, the crossover of the one phase is bridged between two pairs of tooth portions arranged so as to sandwich the four tooth portions of the other two phases.
  • the crossover holding portion has a first notch groove for pulling out one of the crossovers of the other two phases and a second notch groove for pulling out the other of the crossovers of the other two phases. It may have a notch groove.
  • the first notch groove and the second notch groove extend parallel to the axial direction, respectively, and the first notch groove is deeper than the second notch groove.
  • the crossover holding portion is provided at a position having an outer diameter different from that of the first outer peripheral portion that bridges one of the crossover lines of the other two phases and the first outer peripheral portion, and the other two. It may have a second outer peripheral portion that bridges the other of the crossovers of the phase.
  • FIG. 1 It is a side sectional view of the electric motor which concerns on one Embodiment of this invention. It is sectional drawing in the direction of AA line in FIG. It is a perspective view of the stator which concerns on one Embodiment of this invention. It is a side view of the above stator. It is a top view of the stator explaining the winding example of the winding with respect to each tooth part of the stator, A is a U-phase winding, B is a V-phase winding, and C is a W-phase winding. Each line is shown. It is a developed view which shows the relationship between the crossover holding part of an insulator and each tooth part of a stator core in the stator.
  • FIG. 1 is a side sectional view of the electric motor 1 according to the embodiment of the present invention
  • FIG. 2 is a sectional view taken along the line AA in FIG.
  • the electric motor 1 is a brushless DC motor, and is used, for example, as a rotational drive source for a blower fan mounted on an outdoor unit of an air conditioner.
  • the electric motor 1 is an inner rotor type permanent magnet electric motor in which a rotor (rotor) 3 having a permanent magnet is rotatably arranged on the inner peripheral side of a cylindrical stator (stator) 2 that generates a rotating magnetic field.
  • the stator 2 is wound around the teeth portion 212 via a cylindrical stator core (stator core) 21 having a cylindrical yoke portion 211 and a plurality of teeth portions 212 extending radially inward from the yoke portion 211, and an insulator 22. It comprises a three-phase winding 23 that has been turned.
  • the stator 2 is covered with a motor outer shell 6 made of resin, except for the inner peripheral surface of the stator core 21.
  • the rotor 3 is rotatably arranged with a predetermined gap on the inner peripheral side of the stator core 21.
  • the structure of the rotor 3 is not particularly limited, and in the present embodiment, it is a 10-pole surface magnet type in which 10 permanent magnets 31 are arranged in an annular shape on the outer peripheral surface facing the stator core 21.
  • the permanent magnet 31 is fixed to the outer peripheral surface of the outer peripheral side iron core 32.
  • a divided structure of the outer peripheral side iron core 32 and the inner peripheral side iron core 34 is adopted as the rotor core, but the present invention is not limited to this, and a single rotor core not provided with the insulating member 33 may be adopted.
  • the shaft 35 is supported by the first bearing 41 and the second bearing 42, and the first bearing 41 is supported by the first bracket 51 and the second bearing 42 is supported by the second bracket 52, so that the rotor 3 can rotate. Is supported by.
  • the first bearing 41 supports one end side (output side) of the shaft 35 of the rotor 3.
  • the second bearing 42 supports the other end side (counter-output side) of the shaft 35 of the rotor 3.
  • first bearing 41 and the second bearing 42 for example, ball bearings are used.
  • the first bracket 51 is made of metal (steel plate, aluminum, etc.) and is arranged on one end side in the axial direction of the motor outer shell 6, that is, on the output side of the shaft 35.
  • the axial direction means the central axis (axis center O) direction of the stator.
  • the central axes of the electric motor 1, the stator 2, the insulator 22, the rotor 3, and the shaft 35 coincide with the axis O.
  • the first bracket 51 has a first bearing accommodating portion 511 for accommodating the first bearing 41, and a flange portion 512 extending around from the open end of the first bearing accommodating portion 511.
  • the first bearing accommodating portion 511 is formed in a cylindrical shape having a bottom having a through hole for passing the shaft 35, and the flange portion 512 of the first bracket 51 is insert-molded at the time of molding the motor outer shell 6, and the motor is formed. It is integrated with the outer shell 6.
  • the outer ring of the first bearing 41 was press-fitted into the inner surface of the first bearing accommodating portion 511, and the output side of the shaft 35 supported by the inner ring of the first bearing 41 was formed in the center of the bottom of the first bearing accommodating portion 511. It protrudes outward from the through hole.
  • the second bracket 52 is made of metal (steel plate, aluminum, etc.) and is fixed to the other end side of the motor outer shell 6, that is, the counter-output side of the shaft 35.
  • the second bracket 52 includes a disc-shaped bracket main body 521, an outer edge portion 520 that abuts on the opposite end (outer edge portion) of the motor outer shell 6, and a second bearing for accommodating the second bearing 42. It has a part 522.
  • the outer edge portion 520 of the bracket main body 521 is screwed to the end portion (outer edge portion) on the opposite output side of the motor outer shell 6.
  • the second bearing accommodating portion 522 is formed as a hole having a circular bottom surface recessed from the output side to the non-output side in the central portion of the bracket main body 521.
  • the second bracket 52 integrally includes heat radiation fins 523 between the second bearing accommodating portion 522 and the outer edge portion 520 in the radial direction. As a result, the space of the electric motor 1 can be saved.
  • the second bracket 52 is provided with heat radiating fins 523 erected outward on the opposite output side of the shaft 35 as a heat sink, and is mounted on a circuit board 72 for controlling the electric motor 1 via a heat transfer member 71. The heat from the electronic components is dissipated by the heat dissipation fins 523.
  • FIG. 3 is a perspective view of the stator 2
  • FIG. 4 is a side view thereof.
  • the stator 2 has a cylindrical stator core 21, an insulator 22, and a winding 23.
  • the stator core 21 has a plurality of tooth portions 212 protruding inward in the radial direction, and is manufactured by laminating and integrating thin plates made of a soft magnetic material such as an electromagnetic steel plate in the axial direction.
  • the stator core 21 is a 12-slot stator core having 12 teeth portions 212.
  • the insulator 22 is a molded body of an insulating synthetic resin material, and has an annular first insulator 22A that covers one side in the axial direction of the stator core 21 (the output side of the shaft 35) and the other side in the axial direction of the stator core 21. It is a coupling with an annular second insulator 22B that covers (the opposite output side of the shaft 35).
  • the first insulator 22A and the second insulator 22B are each formed into a short cylindrical shape, and have an outer peripheral wall portion 221 that covers the yoke portion 211 of the stator core 21 and a plurality of winding cylinder portions that cover the plurality of teeth portions 212 of the stator core 21. It has 222 (see FIG. 2).
  • the outer peripheral wall portion 221 of the first insulator 22A is provided with a crossover holding portion 223A for bridging the winding 23 wound around the winding body portion 222 to another winding body portion 222.
  • the outer peripheral wall portion 221 of the second insulator 22B is provided with a crossover holding portion 223B for bridging the winding 23 wound around each winding body portion 222 to another winding body portion 222.
  • the winding 23 is a three-phase alternating current winding wound around a plurality of teeth portions 212 of the stator core 21 from above the winding body portions 222 of each of the first insulator 22A and the second insulator 22B.
  • the winding 23 is the first winding 23U corresponding to the U phase and the second winding corresponding to the V phase. It includes 23V and a third winding 23W corresponding to the W phase.
  • Resin-coated copper wire is typically used for the first winding 23U, the second winding 23V, and the third winding 23W (see FIG. 5).
  • 5A to 5C are plan views of the stator 2 when viewed from the first insulator 22A side for explaining a winding example of the winding 23 for each tooth portion 212, and A is a winding of the first winding 23U.
  • B shows a winding example of the second winding 23V, and C shows a winding example of the third winding 23W.
  • stator core 21 In the stator core 21, four tooth portions 212 (U1, U2, U3, U4) around which the first winding 23U is wound and a second winding 23V are wound. It has four teeth portions 212 (V1, V2, V3, V4) and four teeth portions 212 (W1, W2, W3, W4) around which the third winding 23W is wound.
  • U1 and U2, and U3 and U4 each have a pair of first teeth portions adjacent to each other.
  • the first pair of teeth portions of these two sets are arranged at positions symmetrical with respect to the axial center O (central axis) of the cylindrical stator 2.
  • the first winding 23U is wound around the adjacent teeth portions in opposite directions.
  • the first winding 23U is wound clockwise around U1 and U4 and counterclockwise around U2 and U3 when viewed from the axial center O of the stator 2.
  • V1 and V2, and V3 and V4 Focusing on the teeth portion 212 (V1, V2, V3, V4) around which the second winding 23V is wound, V1 and V2, and V3 and V4 are the second teeth portions adjacent to each other. A pair is formed, and these two pairs of second tooth portions are arranged at positions symmetrical with respect to the axial center O of the cylindrical stator 2. As shown in FIG. 5B, the second winding 23V is wound around the adjacent teeth portions in opposite directions. In the present embodiment, the second winding 23V is wound clockwise around V1 and V4 and counterclockwise around V2 and V3 when viewed from the axial center O of the stator 2.
  • W1 and W2, and W3 and W4 are the third teeth portions adjacent to each other. A pair is formed, and these two sets of the third tooth portion pair are arranged at positions symmetrical with respect to the axial center O of the cylindrical stator 2.
  • the third winding 23W is wound around the adjacent teeth portions in opposite directions.
  • the third winding 23W is wound clockwise around W1 and W4 and counterclockwise around W2 and W3 when viewed from the axial center O of the stator 2.
  • the first winding 23U is in the order of U1, U2, U3 and U4, the second winding 23V is in the order of V1, V2, V3 and V4, and the third winding 23W is W1, W2, W3. And W4, respectively, are wound around the teeth portion 212.
  • the winding 23 includes three phase crossovers Uc, Vc and Wc that connect the in-phase windings and are drawn out to the outer peripheral side of the stator core 21.
  • the crossovers Uc, Vc, and Wc of each phase are a part of the windings 23 (23U, 23V, 23W) spanning the outer peripheral portion of the insulator 22 (first insulator 22A), respectively.
  • the U-phase crossover Uc is composed of two first crossovers Uc1 that bridge between two adjacent tooth portions 212 (U1 and U2, and U3 and U4).
  • the line length of the second crossover line Uc2 is longer than the line length of the first crossover line Uc1.
  • the V-phase crossover Vc is a two first crossovers Vc1 that bridge between two adjacent tooth portions 212 (V1 and V2 and V3 and V4). And one second that bridges between the two tooth portions 212 (V2 and V3) that sandwich the four tooth portions 212 (W3, W4, U1 and U2) of the other two phases (W phase and U phase). It has a crossover line Vc2.
  • the line length of the second crossover line Vc2 is longer than the line length of the first crossover line Vc1.
  • the W-phase crossover Wc is the two first crossovers Wc1 that bridge between two adjacent tooth portions 212 (W1 and W2, and W3 and W4). And one second that bridges between the two tooth portions 212 (W2 and W3) that sandwich the four tooth portions 212 (U3, U4, V1 and V2) of the other two phases (U phase and V phase). It has a crossover line Wc2.
  • the line length of the second crossover line Wc2 is longer than the line length of the first crossover line Wc1.
  • FIG. 6 is a development view showing the relationship between the crossover holding portion 223A in the first insulator 22A and each teeth portion 212 of the stator core 21.
  • the crossover holding portion 223A is provided at the axial tip of the first insulator 22A, and is an annular shape capable of holding the crossover lines Uc, Vc, and Wc of each phase spanning between the teeth portions 212. It is the wall part of. As shown in FIG. 6, the crossover lines Uc, Vc, and Wc of each phase crossed between the teeth portions 212 are bridged over the crossover line holding portion 223A.
  • crossover holding portion 223A On the outer peripheral surface of the crossover holding portion 223A, the crossover of one of the three phases of crossovers Uc, Vc, and Wc is diagonally bridged between the crossovers of the other two phases. As described above, the crossovers Uc, Vc, and Wc of each phase are held.
  • the crossover holding portion 223A is divided into three angle ranges R1, R2, and R3 in the circumferential direction
  • the crossover of the one phase is the U phase.
  • the crossover lines of the other two phases correspond to the crossover lines Vc and Wc of the V phase and the W phase.
  • the V-phase crossover Vc and the W-phase crossover Wc are the first crossover Vc1 that bridges between the in-phase tooth portions 212 (V3 and V4, and W1 and W2).
  • Wc1 and the U-phase crossover Uc bridges between the U-phase teeth portions (U2 and U3) sandwiching the four teeth portions of these other two phases (V phase and W phase).
  • the second crossover line Uc2 corresponds to the second crossover line Uc2.
  • the crossover of the one phase corresponds to the crossover Wc of the W phase
  • the crossover of the other two phases corresponds to the crossovers Uc and Vc of the U phase and the V phase. ..
  • the U-phase crossover Uc and the V-phase crossover Vc are the first crossover Uc1 that bridges between the in-phase tooth portions 212 (U3 and U4, and V1 and V2).
  • Vc1 and the W-phase crossover Wc bridges between the W-phase teeth portions (W2 and W3) sandwiching the four teeth portions of these other two phases (U-phase and V-phase). It corresponds to the second crossover Wc2.
  • the crossover of the one phase corresponds to the crossover Vc of the V phase
  • the crossovers of the other two phases correspond to the crossovers Wc and Uc of the W phase and the U phase.
  • the W-phase crossover Wc and the U-phase crossover Uc are the first crossover Wc1 that bridges between the in-phase tooth portions 212 (W3 and W4, and U1 and U2).
  • Uc1 and the V-phase crossover Vc bridges between the V-phase teeth portions (V2 and V3) sandwiching the four teeth portions of these other two phases (W phase and U phase).
  • the second crossover Vc2 corresponds to the second crossover Vc2.
  • the crossover holding portion 223A has the crossovers of the other two phases at different heights in the axial direction and in the axial direction when viewed from the outer peripheral side of the insulator 22 (first insulator 22A). Hold in a position that does not overlap with each other.
  • the crossovers Uc, Vc, and Wc of each phase have the first crossovers Uc1, Vc1, Wc1 and the second crossovers Uc2, Vc2, Wc2 having different line lengths. It is possible to easily realize the method of bridging.
  • the V-phase crossover Vc (Vc1) is on the upper side and the W-phase crossover Wc (Wc1) is on the lower side in the virtual plane orthogonal to the axis O of the stator 2. It is bridged at different height positions of the crossover holding portion 223A. Further, the V-phase crossover Vc (Vc1) and the W-phase crossover Wc (Wc1), which are the crossovers of the other two phases, are separated by a predetermined distance in the circumferential direction so as not to overlap each other in the axial direction. It is held in the desired position.
  • the U-phase crossover line Uc (Uc1) is on the upper side and the V-phase crossover line Vc (Vc1) is on the lower side in the virtual plane orthogonal to the axial center O of the stator 2. It is bridged at different height positions of the crossover holding portion 223A. Further, the U-phase crossover Uc (Uc1) and the V-phase crossover Vc (Vc1), which are the crossovers of the other two phases, are separated by a predetermined distance in the circumferential direction so as not to overlap each other in the axial direction. It is held in the desired position.
  • the W-phase crossover line Wc (Wc1) is on the upper side and the U-phase crossover line Uc (Uc1) is on the lower side in the virtual plane orthogonal to the axis O of the stator 2.
  • the crossover holding portion 223A is bridged at different height positions.
  • the W-phase crossover Wc (Wc1) and the U-phase crossover Uc (Uc1) which are the crossovers of the other two phases, are separated by a predetermined distance in the circumferential direction so as not to overlap each other in the axial direction. It is held in the desired position.
  • the crossover holding portion 223A is provided so that all three phases of crossovers Uc, Vc, and Wc do not overlap in the axial direction when viewed from the outer peripheral side of the insulator 22 (first insulator 22A). (Even if there is a place where the crossovers of any two phases overlap in the axial direction among the crossovers Uc, Vc, Wc of the three phases, all of the crossovers Uc, Vc, Wc of the three phases are in the axial direction. The crossovers Uc, Vc, and Wc of each phase are held so that there is no overlap with the above.
  • the insulation distance is set to 1 mm at the portion where the crossover lines of different phases are closest to each other among the crossover lines Uc, Vc, and Wc of the three phases shown in FIG. Is sufficiently secured. The insulation distance is appropriately changed depending on conditions such as the wire diameter of the crossover, the voltage applied to the crossover, and the current flowing through the crossover.
  • the crossover holding portion 223A is configured as follows.
  • the crossover holding portion 223A has two types of notch grooves (first notch groove G1 and second notch groove) extending in parallel in the axial direction from the tip in the axial direction toward the other end side. It has G2). These notch grooves form a passage for drawing the crossovers Uc, Vc, and Wc of each phase from the radially inner side to the radial outer side of the first insulator 22A, or from the radial outer side to the radial inner side.
  • the first notch groove G1 and the second notch groove G2 are each provided at a plurality of positions, and the first notch groove G1 is deeper than the second notch groove G2.
  • the formation positions of the first notch groove G1 and the second notch groove G2 are arbitrary, and their respective arrangements allow the crossovers Uc, Vc, and Wc of each phase to be bridged in the above-described manner.
  • the interval, sequence order, etc. are determined.
  • a U-phase crossover Uc (Uc2) corresponding to the one-phase crossover is laid on the first notch groove G1 and the second notch groove G2. Passed. Further, between the first notch groove G1 and the second notch groove G2, a V-phase crossover Vc (Vc1), which is one of the crossovers of the other two phases, is formed. The pair of second notch grooves G2 to be bridged and the other pair of first crossovers Wc (Wc1) of the W phase, which is the other crossover of the other two phases, are bridged. Notch groove G1 is provided.
  • the crossover holding portion 223A has a plurality of outer peripheral portions (first outer peripheral portion S1 and second outer peripheral portion S2) having different outer diameter positions (distance from the axis O shown in FIG. 5). Have. These outer peripheral portions are circumferential surfaces formed along the axial direction, and are formed at different outer diameter positions of the first insulator 22A. In the present embodiment, the second outer peripheral portion S2 is located on the outer diameter side of the first outer peripheral portion S1.
  • a V-phase crossover Vc (Vc1) is bridged over the first outer peripheral portion S1 on the inner diameter side, and the W phase is bridged over the second outer peripheral portion S2 on the outer diameter side.
  • Crossover line Wc (Wc1) is crossed.
  • the crossover holding portion 223A has a step portion T forming a boundary between the first outer peripheral portion S1 on the inner diameter side and the second outer peripheral portion S2 on the outer diameter side.
  • the step portion T is typically provided between a pair of first notch grooves G1 adjacent to each other in the circumferential direction.
  • the step portion T is for stably holding the crossover of the two phases that is diagonally crossed between the crossovers of the two phases among the crossovers of the three phases. If the insulation distance between the lines can be secured, the height and position can be set arbitrarily. For example, in the first angle range R1, the step portion T stably holds the U-phase crossover Uc that is diagonally crossed between the V-phase crossover Vc and the W-phase crossover Wc. To do.
  • the windings 23 (23U, 23V, 23W) of each phase are wound around each teeth portion 212 of the stator core 21 while being bridged over the crossover holding portion 223A. Winding of the windings 23U, 23V, and 23W around each tooth portion 212 is performed simultaneously for each phase using a 3-nozzle winding machine.
  • the crossovers Uc, Vc, and Wc of each phase are typically manually bridged to the crossover holding portion 223A by an operator.
  • the stator 2 further has a plurality of pins 24 (24U, 24V, 24W, 24N) connected to the winding start end and winding end end of the winding 23 of each phase (see FIG. 3).
  • the plurality of pins 24 extend along the axial direction and are provided at arbitrary positions of the second insulator 22B.
  • the first pin 24U is connected to the winding start end of the U-phase winding 23U
  • the second pin 24V is connected to the winding start end of the V-phase winding 23V
  • the third pin 24W is the W-phase winding. It is connected to the winding start end of the wire 23W.
  • the fourth pin 24N corresponds to a neutral point commonly connected to the end of each of the windings 23U, 23V, 23W of each phase. As shown in FIG. 1, these plurality of pins 24 are connected to a circuit board 72 arranged between the stator 2 and the second bracket 52.
  • the crossover of one of the three phases Uc, Vc, and Wc is the crossover of the other two phases. Since it is held by the crossover holding portion 223A so as to be bridged diagonally between them, it is necessary to hold the crossovers Uc, Vc, and Wc corresponding to each of the three phases U, V, and W.
  • the height dimension H is sufficient for the height of two upper and lower steps, and the holding area of the height of three steps according to each phase as in the conventional case (the crossover line formed in the three steps described in the column of background technology). No need for containment grooves).
  • the height of the crossover holding portion 223A in the axial direction can be lowered while ensuring the insulation distance between the crossovers of the three phases, and the size of the stator 2 and the motor 1 equipped with the stator 2 can be increased in the axial direction. It can be suppressed.

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

Abstract

Le problème décrit par la présente invention consiste à fournir un stator dont la taille dans la direction axiale peut être empêchée d'augmenter et un moteur électrique. À cet effet, le stator selon un mode de réalisation de la présente invention est doté d'un noyau de stator cylindrique, d'enroulements triphasés et d'un isolant. Le noyau de stator présente une pluralité de dents faisant saillie en direction de l'intérieur dans la direction radiale. Les enroulements triphasés sont enroulés autour de la pluralité de dents. L'isolant est disposé au niveau d'une extrémité dans la direction axiale du noyau de stator et assure une isolation entre le noyau de stator et les enroulements triphasés. Les enroulements triphasés comprennent : un premier enroulement, un deuxième enroulement et un troisième enroulement correspondant aux phases respectives ; et trois fils de connexion de phase, chacun étant ponté sur la partie périphérique externe de l'isolant, connectant les mêmes enroulements de phase l'un à l'autre, et sortant vers le côté de périphérie externe du noyau de stator. L'isolant disposé sur un côté dans la direction axiale présente une partie de maintien de fil de connexion destinée à maintenir les trois fils de connexion de phase de sorte que l'un des trois fils de connexion de phase passe entre les deux autres fils de connexion de phase et est ponté de manière oblique sur sa surface de périphérie externe.
PCT/JP2020/011979 2019-03-29 2020-03-18 Stator et moteur électrique WO2020203294A1 (fr)

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CN202080021578.9A CN113574773A (zh) 2019-03-29 2020-03-18 定子和电动机

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JP2019-066954 2019-03-29
JP2019066954A JP7434719B2 (ja) 2019-03-29 2019-03-29 ステータ及び電動機

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