WO2021161409A1 - 固定子、電動機、圧縮機、空気調和装置および固定子の製造方法 - Google Patents

固定子、電動機、圧縮機、空気調和装置および固定子の製造方法 Download PDF

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Publication number
WO2021161409A1
WO2021161409A1 PCT/JP2020/005296 JP2020005296W WO2021161409A1 WO 2021161409 A1 WO2021161409 A1 WO 2021161409A1 JP 2020005296 W JP2020005296 W JP 2020005296W WO 2021161409 A1 WO2021161409 A1 WO 2021161409A1
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Prior art keywords
coil
portions
slots
stator
slot
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PCT/JP2020/005296
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English (en)
French (fr)
Japanese (ja)
Inventor
智希 増子
松岡　篤
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2021577754A priority Critical patent/JP7361806B2/ja
Priority to PCT/JP2020/005296 priority patent/WO2021161409A1/ja
Publication of WO2021161409A1 publication Critical patent/WO2021161409A1/ja

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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
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • This disclosure relates to a stator, a motor, a compressor, an air conditioner, and a method for manufacturing a stator.
  • Patent Document 1 discloses a stator having 12 poles and 36 slots for accommodating coils.
  • the coils are wound at a pitch of 2 slots, and two coils having different phases are arranged in each slot.
  • the U-phase coil is arranged in the outer layer of the slot, and the W-phase coil is arranged in the inner layer of the slot.
  • Half of the V-phase coils are arranged in the outer layer and half of the inner layer of the slot.
  • the present disclosure has been made to solve the above problems, and an object of the present disclosure is to reduce the imbalance of the current flowing through the coils of each phase and to reduce the pulsation of torque.
  • the stator according to the present disclosure is a stator having 6 N poles (N is an integer of 1 or more), and has a stator core having 18 N slots in the circumferential direction around the axis, and a stator core distributed around the stator core. It has a first coil, a second coil and a third coil that are wound in and out of phase with each other. The first coil, the second coil, and the third coil all have 6N coil portions wound at a 2-slot pitch. In each of the 18N slots, two coils having different phases are arranged on the outer and inner sides in the radial direction about the axis.
  • the 6N coil portions of the first coil consist of 3N outer layer coil portions arranged outside the 6N slots out of the 18N slots and 3N coil portions arranged inside the 6N slots. It has an inner layer coil portion.
  • the 6N coil parts of the second coil are the 3N outer layer coil parts arranged outside the 6N slots out of the 18N slots and the 3N coil parts arranged inside the 6N slots. It has an inner layer coil portion.
  • the 6N coil portions of the third coil are all arranged on the outside of one of the 18N slots and on the inside of another slot.
  • the first coil, the second coil, and the third coil have 2N star connection portions in which the neutral points are connected in parallel without being connected to each other.
  • the difference in inductance of the coils of each phase can be reduced.
  • the imbalance of the current flowing through the coils of each phase can be reduced, and the pulsation of torque can be reduced.
  • FIG. It is sectional drawing which shows the electric motor of Embodiment 1.
  • FIG. It is sectional drawing which shows the arrangement of the coil of Embodiment 1.
  • FIG. It is a schematic diagram which shows the arrangement of the coil of Embodiment 1.
  • FIG. It is a top view which shows the connection state of the coil of Embodiment 1.
  • FIG. It is a schematic diagram which shows the connection state of the coil of Embodiment 1.
  • FIG. It is a schematic diagram which shows the insulation film in a slot of Embodiment 1.
  • FIG. It is a schematic diagram which shows the interphase insulating film of Embodiment 1.
  • FIG. It is a flowchart which shows the manufacturing process of the stator of Embodiment 1.
  • FIG. 1 It is a schematic diagram (A)-(E) which shows the manufacturing process of the stator of Embodiment 1. It is a schematic diagram (A)-(C) which shows the winding process of the coil of Embodiment 1.
  • FIG. It is a flowchart which shows the other example of the manufacturing process of the stator of Embodiment 1. It is a schematic diagram (A)-(E) which shows the manufacturing process of FIG. It is a schematic diagram which shows the connection state of the coil of the electric motor of Embodiment 2. It is a top view which shows the electric motor of the comparative example 1.
  • FIG. It is sectional drawing which shows the arrangement of the coil of the comparative example 1.
  • FIG. It is a schematic diagram which shows the arrangement of the coil of the comparative example 1.
  • FIG. It is a top view which shows the electric motor of the comparative example 2.
  • FIG. It is sectional drawing which shows the arrangement of the coil of the comparative example 2.
  • FIG. It is a graph which shows the loss increase by the difference of the inductance in Embodiments 1 and 2 and Comparative Example 3.
  • FIG. It is a vertical cross-sectional view which shows the compressor to which the motor of Embodiments 1 and 2 is applicable. It is a figure which shows the air conditioner provided with the compressor of FIG.
  • FIG. 1 is a cross-sectional view showing the electric motor 100 of the first embodiment.
  • the motor 100 is a three-phase synchronous motor, and is used, for example, in the compressor 300 (FIG. 22) described later. Further, the electric motor 100 is a permanent magnet embedded type electric motor in which the permanent magnet 55 is embedded in the rotor 5.
  • the motor 100 has a stator 1 and a rotor 5 rotatably provided inside the stator 1. An air gap is provided between the stator 1 and the rotor 5.
  • the rotor 5 has a cylindrical rotor core 50 and a permanent magnet 55 attached to the rotor core 50.
  • the rotor core 50 is, for example, a plurality of electromagnetic steel sheets having a thickness of 0.1 to 0.7 mm laminated in the direction of the rotation axis and fixed by caulking or the like.
  • a circular shaft hole 53 is formed at the center of the rotor core 50 in the radial direction.
  • a shaft 56 which is a rotating shaft, is fixed to the shaft hole 53 by press fitting.
  • the axis C1 which is the central axis of the shaft 56 forms the rotation axis of the rotor 5.
  • the direction of the axis C1 of the shaft 56 is referred to as "axial direction”.
  • the circumferential direction centered on the axis C1 (indicated by the arrow R1 in FIG. 1 and the like) is referred to as a “circumferential direction”.
  • the radial direction centered on the axis C1 is referred to as "diameter direction”.
  • a plurality of magnet insertion holes 51 are formed at equal intervals in the circumferential direction along the outer circumference of the rotor core 50.
  • the number of magnet insertion holes 51 is 6 here.
  • the magnet insertion hole 51 is formed from one end to the other end of the rotor core 50 in the axial direction. Further, the magnet insertion hole 51 extends linearly along the outer peripheral surface of the rotor core 50.
  • a permanent magnet 55 is arranged inside the magnet insertion hole 51.
  • the permanent magnet 55 has a flat plate shape, has a rectangular cross section on a plane orthogonal to the axial direction, and has a thickness in the radial direction.
  • One permanent magnet 55 is arranged in one magnet insertion hole 51. However, a plurality of permanent magnets 55 may be arranged in one magnet insertion hole 51.
  • One magnet insertion hole 51 corresponds to one magnetic pole of the rotor 5.
  • the center of the magnet insertion hole 51 in the circumferential direction is the polar center.
  • the magnet insertion hole 51 extends in a direction orthogonal to a radial straight line (also referred to as a magnetic pole center line) passing through the polar center.
  • the space between the adjacent magnet insertion holes 51 is between the poles.
  • the number of magnet insertion holes 51 in the rotor core 50 corresponds to the number of poles of the rotor 5.
  • the number of poles of the rotor 5 is 6N (N is an integer of 1 or more).
  • N 1, and the number of poles of the rotor 5 is 6 poles.
  • the permanent magnet 55 is composed of a rare earth sintered magnet containing neodymium (Nd), iron (Fe) and boron (B).
  • the permanent magnet 55 is not limited to the rare earth magnet, and may be, for example, a ferrite magnet.
  • the permanent magnet 55 is magnetized so that the outer side in the radial direction and the inner side in the radial direction have opposite magnetic poles.
  • the permanent magnets 55 adjacent to each other in the circumferential direction have magnetic poles opposite to each other facing the outer peripheral side.
  • Flux barriers 52 are formed on both sides of the magnet insertion hole 51 in the circumferential direction.
  • the flux barrier 52 is a gap for suppressing leakage flux between adjacent magnetic poles.
  • the stator 1 has a stator core 10 and a coil 2 wound around the stator core 10 in a distributed winding manner.
  • the stator core 10 is formed by laminating a plurality of electromagnetic steel sheets having a thickness of, for example, 0.1 to 0.7 mm in the axial direction and fixing them by caulking or the like.
  • the stator core 10 has an annular yoke portion 11 and a plurality of teeth 12 extending radially inward from the yoke portion 11. Slots 13 are formed between the teeth 12 adjacent to each other in the circumferential direction. The slot 13 is a portion for accommodating the coil 2 wound around the teeth 12.
  • the number of slots 13 of the stator core 10 is also referred to as the number of slots.
  • the number of slots is 18N (N is an integer of 1 or more).
  • N 1 and the number of slots is 18.
  • the number of teeth 12 is the same as the number of slots.
  • An insulating portion (not shown) is provided between the slot 13 and the coil 2 to insulate the stator core 10 and the coil 2 from each other.
  • the coil 2 has a U-phase coil 2U as a first coil, a V-phase coil 2V as a third coil, and a W-phase coil 2W as a second coil.
  • the U-phase coil 2U has six coil portions U1, U2, U3, U4, U5, U6 in the circumferential direction.
  • the V-phase coil 2V has six coil portions V1, V2, V3, V4, V5, V6 in the circumferential direction.
  • the W-phase coil 2W has six coil portions W1, W2, W3, W4, W5, W6 in the circumferential direction.
  • the "coil portion” has two coil sides (for example, coil sides U11 and U12 described later) inserted into the slot 13 and two coil ends located on the axial end faces of the stator core 10. Say the part.
  • the number of poles of the stator 1 is the number of magnetic fields generated by each of the coils 2U, 2V, and 2W. More specifically, the number of poles of the stator 1 corresponds to the number of coil portions in each of the U-phase coil 2U, the V-phase coil 2V, and the W-phase coil 2W.
  • the number of poles of the stator 1 is 6N (N is a natural number of 1 or more).
  • N 1, and the number of poles of the stator 1 is 6 poles.
  • the number of poles of the stator 1 and the number of poles of the rotor 5 are the same.
  • a total of 18 coils of the coils 2U, 2V, and 2W of each phase are arranged clockwise in FIG. 1 by coil portions U1, W1, V1, U2, W2, V2, U3, W3, V3, U4, W4, V4. It is arranged in the order of U5, W5, V5, U6, W6, V6.
  • each slot 13 of the stator core 10 Two coil portions having different phases are arranged in each slot 13 of the stator core 10.
  • two coil portions are arranged on the outer side in the radial direction and the inner side in the radial direction.
  • the radial outer side of the slot 13 is also referred to as an "outer layer”.
  • the radial inside of the slot 13 is also referred to as an "inner layer”.
  • the coil portions U1, U2, U3, U4, U5, U6 of the U-phase coil 2U are arranged in the outer layer of the slot 13, and the coil portions U2, U4, U6 Is arranged in the inner layer of the slot 13. Therefore, the coil portions U1, U3, and U5 are referred to as outer layer coil portions, and the coil portions U2, U4, and U6 are referred to as inner layer coil portions.
  • the coil portions W1, W2, W3, W4, W5, W6 of the W-phase coil 2W are arranged in the outer layer of the slot 13, and the coil portions W2, W4, W6 Is arranged in the inner layer of the slot 13. Therefore, the coil portions W1, W3 and W5 are referred to as outer layer coil portions, and the coil portions W2, W4 and W6 are referred to as inner layer coil portions.
  • one coil side (for example, the coil side V11 described later) is on the outer layer of the slot 13.
  • the other coil side (for example, the coil side V12 described later) is arranged in the inner layer of the slot 13.
  • the coil portions U1 to U6, the coil portions V1 to V6, and the coil portions W1 to W6 are all inserted into the slots 13 at a 2-slot pitch.
  • Inserting the coil part into the slot 13 at a pitch of 2 slots means that the coil part is inserted into a certain slot 13 and the adjacent slot 13 (that is, the second slot in the circumferential direction) by opening one slot in the circumferential direction from the slot 13. Say to insert. In other words, the coil portion is inserted into the two slots 13 on both sides of the two teeth 12 adjacent to each other in the circumferential direction.
  • FIG. 2 is a cross-sectional view of the motor 100 for explaining the arrangement of the coils 2U, 2V, and 2W.
  • the coil portion U1 has coil sides U11 and U12
  • the coil portion U2 has coil sides U21 and U22
  • the coil portion U3 has coil sides U31 and U32.
  • the coil portion U4 has coil sides U41 and U42
  • the coil portion U5 has coil sides U51 and U52
  • the coil portion U6 has coil sides U61 and U62.
  • the coil portion V1 has coil sides V11 and V12
  • the coil portion V2 has coil sides V21 and V22
  • the coil portion V3 has coil sides V31 and V32
  • the coil portion V4 has coil sides V41 and V42
  • the coil portion V5 has coil sides V51 and V52
  • the coil portion V6 has coil sides V61 and V62.
  • the coil portion W1 has coil sides W11 and W12
  • the coil portion W2 has coil sides W21 and W22
  • the coil portion W3 has coil sides W31 and W32
  • the coil portion W4 has coil sides W41 and W42
  • the coil portion W5 has coil sides W51 and W52
  • the coil portion W6 has coil sides W61 and W62.
  • Two coil sides (for example, coil side U11 and coil side V12) having different phases are arranged in the outer layer and the inner layer in any slot 13 of the stator core 10.
  • the coil sides U11, U12, U31, U32, U51, and U52 of the coil portions U1, U3, and U5 are all arranged in the outer layer of the slot 13.
  • the coil sides U21, U22, U41, U42, U61, and U62 of the coil portions U2, U4, and U6 are all arranged in the inner layer of the slot 13.
  • the coil sides W11, W12, W31, W32, W51, and W52 of the coil portions W1, W3, and W5 are all arranged in the outer layer of the slot 13.
  • the coil sides W21, W22, W41, W42, W61, and W62 of the coil portions W2, W4, and W6 are all arranged in the inner layer of the slot 13.
  • the coil sides V11, V21, V31, V41, V51, and V61 of the coil portions V1 to V6 are all arranged in the outer layer of the slot 13.
  • the coil sides V12, V22, V32, V42, V52, and V62 of the coil portions V1 to V6 are all arranged in the inner layer of the slot 13.
  • the coil side V12 of the coil portion V1 is arranged in the inner layer of the slot 13 adjacent to the slot 13 in which the coil side V11 of the same coil portion V1 is arranged in the outer layer with one slot in the circumferential direction.
  • the coil portions V2 to V6 are also the same as the coil portions V1.
  • two coil sides (for example, coil sides V11 and V21) adjacent to each other in the circumferential direction are two slots adjacent to each other in the circumferential direction.
  • Each of the thirteen is arranged in the outer layer.
  • two coil sides (for example, coil sides V12 and W62) adjacent to each other in the circumferential direction are two slots adjacent to each other in the circumferential direction.
  • Each of the thirteen is arranged in the inner layer.
  • Each coil side of the coil portions U1, U3, U5 and the coil portions V1, V3, V5 is arranged so that a current flows counterclockwise when viewed from the axis C1 side.
  • each of the coil portions W1, W3, and W5 is arranged so that a current flows clockwise when viewed from the axis C1 side.
  • Each coil side of the coil portions U2, U4, U6 and the coil portions V2, V4, V6 is arranged so that a current flows clockwise when viewed from the axis C1 side.
  • each of the coil portions W2, W4, and W6 is arranged so that a current flows counterclockwise when viewed from the axis C1 side.
  • FIG. 3 shows the arrangement of each coil side of the coil portions U1 to U6, each coil side of the coil portions V1 to V6, and each coil side of the coil portions W1 to W6 in a linearly developed manner of the stator core 10. It is a schematic diagram.
  • the coil end on one end surface in the axial direction of the stator core 10 is indicated by reference numeral E.
  • a similar coil end E is also arranged on the other end surface of the stator core 10.
  • the coil end E of the coil portion U1 connects the coil sides U11 and U12 to each other
  • the coil end E of the coil portion U2 connects the coil sides U21 and U22 to each other
  • the coil end E of the coil portion U3 is the coil side U31.
  • U32 are connected to each other.
  • the coil end E of the coil portion U4 connects the coil sides U41 and U42 to each other
  • the coil end E of the coil portion U5 connects the coil sides U51 and U52 to each other
  • the coil end E of the coil portion U6 is.
  • the coil sides U61 and U62 are connected to each other.
  • each coil portion connects the two coil sides to each other as in the coil portions U1 to U6.
  • FIG. 4 is a schematic view showing the connection state of the coil portions U1 to W6 in the stator 1.
  • a drive voltage is supplied to the motor 100 from an inverter.
  • the U-phase, V-phase, and W-phase output terminals of the inverter are indicated by reference numerals 80U, 80V, and 80W.
  • the coil portion U1 is connected to the coil portion U3 by the crossover line U101, and further connected to the coil portion U5 by the crossover wire U103. That is, the coil portions U1, U3, and U5 are connected in series.
  • the coil portion U1 is connected to the output terminal 80U by the wiring portion 81, and the coil portion U5 is connected to the neutral point 87.
  • the coil portion U2 is connected to the coil portion U4 by the crossover line U102, and further connected to the coil portion U6 by the crossover wire U104. That is, the coil portions U2, U4, and U6 are connected in series.
  • the coil portion U2 is connected to the neutral point 88, and the coil portion U6 is connected to the output terminal 80U by the wiring portion 84.
  • the coil portion V1 is connected to the coil portion V3 by the crossover wire V101, and further connected to the coil portion V5 by the crossover wire V103. That is, the coil portions V1, V3, and V5 are connected in series.
  • the coil portion V1 is connected to the output terminal 80V by the wiring portion 82, and the coil portion V5 is connected to the neutral point 87.
  • the coil portion V2 is connected to the coil portion V4 by the crossover wire V102, and further connected to the coil portion V6 by the crossover wire V104. That is, the coil portions V2, V4, and V6 are connected in series.
  • the coil portion V2 is connected to the neutral point 88, and the coil portion V6 is connected to the output terminal 80V by the wiring portion 85.
  • the coil portion W1 is connected to the coil portion W3 by the crossover line W101, and further connected to the coil portion W5 by the crossover wire W103. That is, the coil portions W1, W3, and W5 are connected in series.
  • the coil portion W1 is connected to the output terminal 80W by the wiring portion 86, and the coil portion W3 is connected to the neutral point 88.
  • the coil portion W2 is connected to the coil portion W4 by the crossover line W102, and further connected to the coil portion W6 by the crossover wire W104. That is, the coil portions W2, W4, and W6 are connected in series.
  • the coil portion W2 is connected to the output terminal 80W by the wiring portion 83, and the coil portion W6 is connected to the neutral point 87.
  • crossover lines U101 to U104, V101 to V104, W101 to W105, wiring portions 81 to 86, and neutral points 87 and 88 are shown on the outside or inside of the stator core 10 in the radial direction in FIG. Actually, it is arranged on one end side of the stator core 10 in the axial direction and is covered with resin or the like.
  • FIG. 5 is a block diagram showing a wiring state of the coil portions U1 to W6 shown in FIG.
  • the coil portions U1, U3, U5 connected to the output terminal 80U, the coil portions V1, V3, V5 connected to the output terminal 80V, and the coil portions W2, W4, W6 connected to the output terminal 80W are any of them. Is also connected to neutral point 87.
  • the coil portions U1, U3, U5 outer layer coil portion
  • the coil portions V1, V3, V5, and the coil portions W2, W4, W6 inner layer coil portions
  • the star connection portion 101 is connected. It is configured.
  • the coil portions U2, U4, U6 connected to the output terminal 80U, the coil portions V2, V4, V6 connected to the output terminal 80V, and the coil portions W1, W3, W5 connected to the output terminal 80W are , Both are connected to the neutral point 88.
  • the coil portions U2, U4, U6 inner layer coil portion
  • the coil portions V2, V4, V6, and the coil portions W1, W3, W5 are connected by a star connection
  • the star connection portion 102 is connected. It is configured.
  • the star connection portion 101 and the star connection portion 102 are connected in parallel. However, the neutral point 87 of the star connection portion 101 and the neutral point 88 of the star connection portion 102 are not connected.
  • the connection state of the coils 2U, 2V, and 2W can be expressed as follows.
  • N star connection portions 101 are formed by the 3N outer layer coil portions of the U-phase coil 2U, the 3N coil portions of the V-phase coil 2V, and the 3N inner layer coils of the W-phase coil 2W.
  • N star connection portions 102 are formed by 3N inner layer coil portions of the U phase coil 2U, 3N coil portions of the V phase coil 2V, and 3N outer layer coils of the W phase coil 2W. NS.
  • 2N star connection portions 101 and 102 whose neutral points are not connected to each other are configured.
  • FIG. 6 is a schematic view showing the stator core 10, the coil portions U1 to U6, V1 to V6, W1 to W6, and the in-slot insulating film 71. As described above, in each slot 13 of the stator core 10, two coil sides having different phases are arranged in the outer layer and the inner layer.
  • the in-slot insulating film 71 is arranged so as to be located between the coil sides of the outer layer and the inner layer.
  • the in-slot insulating film 71 is a strip-shaped film that is made of an insulating resin such as polyethylene terephthalate (PET) and is long in the axial direction.
  • FIG. 7 is a schematic view showing the stator core 10, the coil portions U1 to U6, V1 to V6, W1 to W6, and the interphase insulating films 91 to 94.
  • the coil ends of two coil portions having different phases are adjacent to each other.
  • interphase insulating films 91 to 94 for insulating the coil ends of the coil portions having different phases are arranged on the axial end surface of the stator core 10.
  • the interphase insulating films 91 to 94 are all strip-shaped films made of an insulating resin such as PET and having a width in the axial direction.
  • the interphase insulating film 91 is arranged on the outer side in the radial direction of the coil portions V1 to V6, and extends 360 degrees or more around the axis C1. Both ends 91a and 91b of the interphase insulating film 91 in the longitudinal direction are fixed to each other by adhesion.
  • the interphase insulating film 91 insulates the coil portions V1 to V6, the coil portions U1, U3, U5, and the coil portions W1, W3, W5 from each other.
  • the interphase insulating film 92 is arranged inside the coil portions V1 to V6 in the radial direction, and extends 360 degrees or more around the axis C1. Both ends 92a and 92b of the interphase insulating film 92 in the longitudinal direction are fixed to each other by adhesion.
  • the interphase insulating film 92 insulates the coil portions V1 to V6, the coil portions U2, U4, U6, and the coil portions W2, W4, W6 from each other.
  • the three interphase insulating films 93 are arranged inside the coil portions U1, U3, and U5 in the radial direction, respectively.
  • the interphase insulating film 93 insulates the coil portions U1 and W1 from each other, insulates the coil portions U3 and W3 from each other, and insulates the coil portions U5 and W5 from each other.
  • the three interphase insulating films 94 are arranged inside the coil portions U2, U4, and U6 in the radial direction, respectively.
  • the interphase insulating film 94 insulates the coil portions U2 and W2 from each other, insulates the coil portions U4 and W4 from each other, and insulates the coil portions U6 and W6 from each other.
  • FIG. 7 shows the interphase insulating films 91 to 94 arranged on one end surface of the stator core 10 in the axial direction
  • the same interphase insulating film 91 is also shown on the other end surface of the stator core 10 in the axial direction.
  • ⁇ 94 are arranged.
  • the interphase insulating films 91 to 94 shown in FIG. 7 are merely examples.
  • the number and arrangement of the interphase insulating films are not particularly limited as long as the coil ends of the coil portions having different phases can be insulated from each other.
  • the short-term winding coefficient Kp, the number of slots per pole and each phase q, the distributed winding coefficient Kd, and the winding coefficient Kw of the stator 1 configured in this way are as follows.
  • the short winding coefficient Kp is calculated by the following equation (1) based on the number of poles, the number of slots, and the slot pitch.
  • Kp sin ⁇ number of poles / (number of slots / slot pitch) x ( ⁇ / 2) ⁇ ...
  • the number of poles is 6
  • the number of slots per pole and phase q is obtained from the number of slots, the number of poles, and the number of phases by the following equation (2).
  • q number of slots / (number of poles x number of phases) ...
  • the distributed winding coefficient Kd is obtained by the following equation (3) from the number of slots q for each pole and each phase.
  • Kd sin ( ⁇ / 6) / (q ⁇ sin ( ⁇ / 6q))... (3) Since the number of slots q for each pole and each phase is 1, the distributed winding coefficient Kd is 1.
  • FIG. 8 is a flowchart showing a manufacturing process of the stator 1.
  • 9 (A) to 9 (E) are plan views for each step showing the winding step of the coil 2 in the manufacturing steps of the stator 1.
  • stator core 10 is assembled by laminating a plurality of electromagnetic steel sheets in the axial direction and fixing them by caulking or the like (step S101).
  • step S102 the coil portions U1, U3, U5 of the U-phase coil 2U are inserted into the slot 13 (step S102).
  • the inserters used in step S102 and the following steps S103, S105, S107, and S109 will be described later.
  • the coil sides U11, U12, U31, U32, U51, and U52 of the coil portions U1, U3, and U5 are inserted into the outer layer of the slot 13.
  • the coil portions W1, W3, W5 of the W-phase coil 2W are inserted into the slot 13 (step S103).
  • the coil sides W11, W12, W31, W32, W51, W52 of the coil portions W1, W3, W5 are the coil sides U11, U12, U31, U32, U51, U52 (FIG. 9 (FIG. 9). It is inserted into the outer layer of the slot 13 different from A)).
  • step S104 the in-slot insulating film 71 described with reference to FIG. 7 is arranged in the slot 13 into which the coil portions U1, U3, U5, W1, W3, W5 are inserted.
  • the coil portions V1 to V6 of the V-phase coil 2V are inserted into the slot 13 (step S105).
  • the coil sides V11, V31, and V51 of the coil portions V1, V3, and V5 are inserted into the outer layer of the slot 13.
  • the coil sides V12, V32, and V52 are inserted into the inner layer of the slot 13 into which the coil sides U11, U31, and U51 (FIG. 9A) are inserted.
  • the coil sides V21, V41, and V61 of the coil portions V2, V4, and V6 are inserted into the outer layer of the slot 13.
  • the coil sides V22, V42 and V62 are inserted into the inner layer of the slot 13 into which the coil sides W31, W51 and W11 (FIG. 9B) are inserted.
  • the in-slot insulating film 71 described with reference to FIG. 7 is arranged in the slot 13 into which the coil portions V1 to V6 are inserted (step S106).
  • the coil portions U2, U4, and U6 of the U-phase coil 2U are inserted into the slot 13 (step S107).
  • the coil sides U21, U41, and U61 of the coil portions U2, U4, and U6 are located in the inner layer of the slot 13 into which the coil sides W12, W32, and W52 (FIG. 9B) are inserted. Will be inserted.
  • the coil sides U22, U42, and U62 of the coil portions U2, U4, and U6 are inserted into the inner layer of the slot 13 into which the coil sides V21, V41, and V61 (FIG. 9C) are inserted.
  • the in-slot insulating film 71 described with reference to FIG. 7 is arranged in the slot 13 into which the coil portions U2, U4, and U6 are inserted (step S108).
  • the coil portions W2, W4, and W6 of the W-phase coil 2W are inserted into the slot 13 (step S109).
  • the coil sides W21, W41, and W61 of the coil portions W2, W4, and W6 are located in the inner layer of the slot 13 into which the coil sides U32, U52, and U12 (FIG. 9A) are inserted. Will be inserted.
  • the coil sides W22, W42, and W62 of the coil portions W2, W4, and W6 are inserted into the inner layer of the slot 13 into which the coil sides V11, V31, and V51 (FIG. 9C) are inserted.
  • interphase insulating films 91 to 94 described with reference to FIG. 8 are arranged on both end faces in the axial direction of the stator core 10.
  • the interphase insulating films 91 to 94 may be arranged in the same step (steps S104, S106, S108) as the arrangement of the in-slot insulating films 71.
  • step S110 the U-phase coil 2U, the V-phase coil 2V, and the W-phase coil 2W are connected as described with reference to FIG. 6 (step S110). That is, two star connection portions 101 and 102 whose neutral points are not connected are connected in parallel. As a result, the production of the stator 1 is completed.
  • step S101 corresponds to the step of assembling the stator core 10 having 18N slots.
  • step S102 corresponds to a step of inserting 3N of the 6N coil portions of the U-phase coil 2U into the outer layer of the 6N slots.
  • step S103 corresponds to a step of inserting 3N of the 6N coil portions of the W-phase coil 2W into the outer layer of the 6N slots 13.
  • Step S105 corresponds to a step of inserting 6N coil portions of the V-phase coil 2V into the outer layer of one slot 13 of the 18N slots 13 and the inner layer of another slot 13.
  • Step S107 corresponds to a step of inserting 3N of the 6N coil portions of the U-phase coil 2U into the inner layer of the 6N slots 13.
  • Step S109 corresponds to a step of inserting 3N of the 6N coil portions of the W-phase coil 2W into the inner layer of the 6N slots 13.
  • FIG. 10A is a perspective view showing the inserter 6 used in the above steps S101, S102, S105, S107, and S109 together with the stator core 10.
  • the inserter 6 is an automatic winding device having the same number of blades (claws) 61 as the slots 13.
  • the inserter 6 comprises a plurality of axially long blades (claw) 61 arranged at equal intervals in the circumferential direction about the axis C1 and an annular base 60 connecting one end of each blade 61 in the axial direction. Have. A slit 62 is formed between the blades 61 adjacent to each other in the circumferential direction.
  • a coil portion is attached to the slit 62 of the inserter 6.
  • the coil portions V1 to V6 to be inserted into the slot 13 in step S105 are attached to the inserter 6.
  • FIG. 10B is a top view of the coil portions V1 to V6 mounted on the inserter 6 as viewed from the stator core 10 side. Each of the coil portions V1 to V6 is inserted into two adjacent slits 62 with one slit open.
  • FIG. 10C is a top view showing a state in which the inserter 6 is inserted inside the stator core 10.
  • the inserter 6 is inserted so that the blade 61 is located radially inside the teeth 12.
  • the coil portions V1 to V6 held in the slit 62 are all inserted into two adjacent slots 13 with one slot in the circumferential direction.
  • step S102 the coil portions U1, U3, and U5 are inserted into the slot 13 by the inserter 6.
  • step S103 the coil portions W1, W3, and W5 are inserted into the slot 13 by the inserter 6.
  • step S107 the coil portions U2, U4, and U6 are inserted into the slot 13 by the inserter 6.
  • step S109 the coil portions W2, W4, and W6 are inserted into the slot 13 by the inserter 6.
  • FIG. 11 is a flowchart showing another example of the manufacturing process of the stator 1 of the first embodiment.
  • the coil portions U2, U4, U6 of the U-phase coil 2U are inserted into the slot 13 in step S107, and the coil portions W2, W4, W6 of the W-phase coil 2W are inserted in the subsequent step S109. It was inserted into slot 13.
  • the coil portions W2, W4, W6 of the W-phase coil 2W are inserted into the slot 13 in step S107A, and the coil portions U2, U4, U6 of the U-phase coil 2U are subsequently inserted in step S109A. Is inserted into slot 13.
  • 12 (A) to 12 (E) are plan views of each of the manufacturing processes of FIG. 11 showing the winding process of the coil 2.
  • 12 (A) to 12 (C) are the same as those of FIGS. 9 (A) to 9 (C).
  • step S107A the coil portions W2, W4, and W6 of the W-phase coil 2W are inserted into the slot 13.
  • the coil sides W21, W41, and W61 of the coil portions W2, W4, and W6 are inserted into the inner layer of the slot 13 into which the coil sides U32, U52, and U12 (FIG. 12B) are inserted.
  • the coil sides W22, W42, and W62 of the coil portions W2, W4, and W6 are inserted into the inner layer of the slot 13 into which the coil sides V11, V31, and V51 (FIG. 12 (C)) are inserted.
  • step S109A the coil portions U2, U4, and U6 of the U-phase coil 2U are inserted into the slot 13.
  • the coil sides U21, U41, and U61 of the coil portions U2, U4, and U6 are inserted into the inner layer of the slot 13 into which the coil sides W12, W32, and W52 (FIG. 12B) are inserted.
  • the coil sides U22, U42, and U62 of the coil portions U2, U4, and U6 are inserted into the inner layer of the slot 13 into which the coil sides V21, V41, and V61 (FIG. 12 (C)) are inserted.
  • the manufacturing process of FIG. 11 is the same as the manufacturing process of FIG. 8 except that steps S107A and S109A are executed instead of steps S107 and S109.
  • the structure of the stator 1 manufactured in the manufacturing process of FIG. 11 is the same as that of the stator 1 of FIG. 1 except for the arrangement of the coil portions U2, U4, U6 and the coil portions W2, W4, W6.
  • the U-phase coil 2U has coil portions U1, U3, U5 arranged in the outer layer of the slot 13 and coil portions U2, U4, U6 arranged in the inner layer of the slot 13.
  • the W-phase coil 2W has coil portions W1, W3, W5 arranged in the outer layer of the slot 13, and coil portions W2, W4, W6 arranged in the inner layer of the slot 13.
  • the coil portions V1 to V6 of the V-phase coil 2V are all arranged in the outer layer of the slot 13 and the inner layer of the slot 13 adjacent to the slot 13 with one slot open.
  • each of the U-phase coil 2U, the V-phase coil 2V, and the W-phase coil 2W has six coil sides in the outer layer and the inner layer of the slot 13. In this way, since the coil sides of the coils 2U, 2V, 2W of each phase are uniformly arranged in the radial direction, the difference in inductance of the coils 2U, 2V, 2W of each phase is reduced.
  • the coil portions U1 to U6 of the U-phase coil 2U, the coil portions V1 to V6 of the V-phase coil 2V, and the coil portions W1 to W6 of the W-phase coil 2W are , Since it can be inserted into the slot 13 using the inserter 6, the manufacturing process can be simplified.
  • the coil group of the star connection portion 101 (coils U1, U3). , U5, V1, V3, V5, W2, W4, W6) and the coil group of the star connection 102 (coils U2, U4, U6, V2, V4, V6, W1, W3, W5). It will be reduced.
  • the neutral points 87 and 88 of the star connection portions 101 and 102 are not connected, and the coil group of the star connection portion 101 and the coil group of the star connection portion 102 are circulated.
  • the current is reduced. Therefore, even if there is a difference in inductance between the coil group of the star connection portion 101 and the coil group of the star connection portion 102, an increase in copper loss can be suppressed.
  • the stator 1 of the first embodiment has a number of poles of 6N (N is an integer of 1 or more), and is distributed around the stator core 10 having 18N slots and the stator core 10. It has a U-phase coil 2U (first coil), a V-phase coil 2V (second coil), and a W-phase coil 2W (third coil) wound by.
  • the coils 2U, 2V, and 2W all have 6N coil portions wound at a 2-slot pitch. Two coil portions having different phases are inserted into each slot 13.
  • the U-phase coil 2U has 3N coil portions U1, U3, U5 inserted in the outer layer (diameter outer side) of the slot 13 and 3N coil portions U2 inserted in the inner layer (diameter inner side) of the slot 13. , U4, U6.
  • the W-phase coil 2W has 3N coil portions W1, W3, W5 inserted in the outer layer of the slot 13 and 3N coil portions W2, W4, W6 inserted in the inner layer of the slot 13.
  • the 6N coil portions V1 to V6 of the V-phase coil 2V are all inserted into the outer layer of the slot 13 and the inner layer of another slot 13.
  • each of the coils 2U, 2V, and 2W of each phase has 6N coil sides on the radial outer side and the radial inner side of the slot 13. Since the coil sides of the coils 2U, 2V, 2W of each phase are uniformly arranged in the radial direction in this way, the difference in inductance of the coils 2U, 2V, 2W of each phase is reduced. As a result, the imbalance of the current flowing through the coils 2U, 2V, and 2W of each phase can be reduced, and the torque pulsation can be reduced.
  • each coil portion of the coil 2U, 2V, and 2W can be inserted into the slot 13 by the inserter 6, the manufacturing process can be simplified.
  • the neutral points 87 and 88 of the star connection portions 101 and 102 are not connected to each other, the current circulating between the coil group of the star connection portion 101 and the coil group of the star connection portion 102 is reduced. Therefore, even if there is a difference in inductance between the coil group of the star connection portion 101 and the coil group of the star connection portion 102, an increase in copper loss can be suppressed.
  • 3N coil parts U1, U3, U5 outer layer coil part
  • 3N coil parts W1, W3, W5 inner layer coil part
  • 3N coil parts V1, V3, V5 are N pieces.
  • 3N coil parts U2, U4, U6 inner layer coil part
  • 3N coil parts W2, W4, W6 inner layer coil part
  • V4 and V6 form N star connection portions 102. Since the coil portion of the outer layer and the coil portion of the inner layer are evenly included in both the star connection portions 101 and 102, the current flowing through the coil group of the star connection portion 101 and the current flowing through the coil group of the star connection portion 102 The imbalance can be effectively reduced and the increase in copper loss can be reduced.
  • Embodiment 2 Next, the second embodiment will be described.
  • the stator of the second embodiment is different from the first embodiment in the connection state of the U-phase coil 2U, the V-phase coil 2V, and the W-phase coil 2W.
  • FIG. 13 shows the wiring states of the coil portions U1 to U6 of the U-phase coil 2U, the coil portions V1 to V6 of the V-phase coil 2V, and the coil portions W1 to W6 of the W-phase coil 2W in the stator of the second embodiment. It is a block diagram.
  • the coil portions U1, U3, and U5 of the U-phase coil 2U are connected to the output terminal 80U by the wiring portion 81 and also to the neutral point 87.
  • the coil portions V1, V3, and V5 of the V-phase coil 2V are connected to the output terminal 80V by the wiring portion 82 and also connected to the neutral point 87.
  • the coil portions W1, W3, W5 of the W-phase coil 2W are connected to the output terminal 80W by the wiring portion 83 and also connected to the neutral point 87.
  • the coil portions U1, U3, U5 (outer layer coil portion), the coil portions V1, V3, V5, and the coil portions W1, W3, W5 (outer layer coil portion) are connected by a star connection, and the star connection portion 101 is connected. It is configured.
  • the coil portions U2, U4, and U6 of the U-phase coil 2U are connected to the output terminal 80U by the wiring portion 84 and also connected to the neutral point 88.
  • the coil portions V2, V4, and V6 of the V-phase coil 2V are connected to the output terminal 80V by the wiring portion 85 and are also connected to the neutral point 88.
  • the coil portions W2, W4, and W6 of the W-phase coil 2W are connected to the output terminal 80W by the wiring portion 86 and are connected to the neutral point 88.
  • the coil portions U2, U4, U6 inner layer coil portion
  • the coil portions V2, V4, V6, and the coil portions W2, W4, W6 inner layer coil portion
  • the star connection portion 102 is connected. It is configured.
  • the star connection portion 101 and the star connection portion 102 are connected in parallel. However, the neutral point 87 of the star connection portion 101 and the neutral point 88 of the star connection portion 102 are not connected.
  • the outer layer coil portion and the inner layer coil portion were evenly included in each of the star connection portions 101 and 102.
  • the star connection portion 101 includes the coil portions U1, U3, U5 and the coil portions W1, W3, W5 (both are outer layer coil portions), and the star connection portion 101 is included.
  • the connection portion 102 includes coil portions U2, U4, U6 and coil portions W2, W4, W6 (both are inner layer coil portions).
  • the torque pulsation can be suppressed as in the first embodiment.
  • Comparative Example 1 to 3 to be compared with the first and second embodiments will be described with reference to FIGS. 14 to 20.
  • some of the components of the comparative example are designated by the same reference numerals as those of the first embodiment.
  • FIG. 14 is a cross-sectional view showing the electric motor 100A of Comparative Example 1.
  • the arrangement of the U-phase coil 2U, the V-phase coil 2V, and the W-phase coil 2W in the stator 1A is different from that of the first embodiment.
  • the U-phase coil 2U has coil portions U1 to U6, the V-phase coil 2V has coil portions V1 to V6, and the W-phase coil 2W has coil portions W1 to W6.
  • the coil portions U1 to W6 are all inserted into the slots 13 at a 2-slot pitch.
  • FIG. 15 is a diagram showing the arrangement of the coil portions U1 to U6, the coil portions V1 to V6, and the coil portions W1 to W6 of Comparative Example 1.
  • the coil portions U1 to U6 each have a coil side
  • the coil portions V1 to V6 each have a coil side
  • the coil portions W1 to W6 each have a coil side, as described in the first embodiment. ..
  • the coil sides U11, U12, U21, U22, U31, U32, U41, U42, U51, U52, U61, and U62 of the coil portions U1 to U6 of the U-phase coil 2U are all arranged in the outer layer of the slot 13. ..
  • the coil sides W11, W12, W21, W22, W31, W32, W41, W42, W51, W52, W61, and W62 of the coil portions W1 to W6 of the W-phase coil 2W are all arranged in the inner layer of the slot 13. ..
  • the coil sides V11, V31, and V51 of the coil portions V1, V3, and V5 are arranged in the outer layer of the slot 13 into which the coil sides W22, W42, and W62 are inserted.
  • the coil sides V12, V32, and V52 are arranged in the inner layer of the slot 13 into which the coil sides U11, U31, and U51 are inserted.
  • the coil sides V21, V41, and V61 of the coil portions V2, V4, and V6 are arranged in the outer layer of the slot 13 into which the coil sides U22, U42, and U62 are inserted.
  • the coil sides V22, V42, and V62 are arranged in the inner layer of the slot 13 into which the coil sides W31, W51, and W11 are inserted.
  • FIG. 16 is a schematic diagram showing the arrangement of each coil side of the coil portions U1 to U6, each coil side of the coil portions V1 to V6, and each coil side of the coil portions W1 to W6 by linearly developing the stator core 10. It is a figure.
  • the coil end E of each coil portion connects the two coil sides to each other.
  • the coil portions U1 to U6 of the U-phase coil 2U are arranged in the outer phase, the coil portions W1 to W6 of the W-phase coil 2W are arranged in the inner layer, and the coil portions V1 to V6 of the V-phase coil 2V have diameters. It is located in the center of the direction. Therefore, a difference in inductance is likely to occur in the coils 2U, 2V, and 2W of each phase.
  • the coil sides of the coils 2U, 2V, 2W of each phase are uniformly arranged in the radial direction, so that the difference in inductance of the coils 2U, 2V, 2W of each phase Can be reduced.
  • the imbalance of the current flowing through the coils 2U, 2V, and 2W of each phase can be reduced, and the torque pulsation can be reduced.
  • FIG. 17 is a cross-sectional view showing the electric motor 100B of Comparative Example 2.
  • the arrangement of the U-phase coil 2U, the V-phase coil 2V, and the W-phase coil 2W in the stator 1B is different from that of the first embodiment.
  • the coil portion U1 is wound in a spiral shape so as to be arranged in an inner layer in a certain slot 13 and an outer layer in a slot 13 adjacent to the slot 13 with one slot open.
  • the coil portion V1 and the coil portion W1 are also wound in a spiral shape in the same manner.
  • the U-phase coil 2U has coil portions U1 to U6, the V-phase coil 2V has coil portions V1 to V6, and the W-phase coil 2W has coil portions W1 to W6.
  • the coil portions U1 to W6 are all inserted into the slots 13 at a 2-slot pitch.
  • FIG. 18 is a diagram showing the arrangement of the coil portions U1 to U6, the coil portions V1 to V6, and the coil portions W1 to W6 of Comparative Example 1.
  • the coil portions U1 to U6 each have a coil side
  • the coil portions V1 to V6 each have a coil side
  • the coil portions W1 to W6 each have a coil side, as described in the first embodiment. ..
  • the coil sides U11, U31, and U51 of the coil portions U1, U3, and U5 of the U-phase coil 2U are all arranged in the inner layer of the slot 13, and the coil sides U12, U32, and U52 are all arranged in the outer layer of the slot 13. ing.
  • the coil sides U21, U41, and U61 of the coil portions U2, U4, and U6 are all arranged in the outer layer of the slot 13, and the coil sides U22, U42, and U62 are all arranged in the inner layer of the slot 13.
  • the arrangement of the coil side of the V-phase coil 2V and the W-phase coil 2W is the same as the arrangement of the coil side of the U-phase coil 2U.
  • FIG. 19 shows the arrangement of each coil side of the coil portions U1 to U6, each coil side of the coil portions V1 to V6, and each coil side of the coil portions W1 to W6 in a linearly developed manner of the stator core 10. It is a schematic diagram.
  • the coil end E of each coil portion connects the two coil sides to each other.
  • the coil portions U1 to U6, the coil portions W1 to W6, and the coil portions V1 to V6 of Comparative Example 2 cannot be inserted into the slot 13 by the inserter 6 (FIG. 10 (A)).
  • the inserter 6 inserts the coil portion into the slot 13 from the inside in the radial direction, but the coil portion must be inserted into the outer layer rather than the first coil portion regardless of which coil portion of the coil portions U1 to W6 is started to be inserted. Because there is.
  • the coil portions U1 to W6 are adjacent to each other with different phases of coil portions. Therefore, the interphase insulating film described with reference to FIG. 7 requires 18 sheets, which is the total number of the coil portions U1 to W6, and the work of installing the interphase insulating film becomes complicated.
  • FIG. 20 is a block showing the connection state of the coil portions U1 to U6 of the U-phase coil 2U, the coil portions V1 to V6 of the V-phase coil 2V, and the coil portions W1 to W6 of the W-phase coil 2W in the stator of Comparative Example 3. It is a figure.
  • the configuration of the stator of Comparative Example 3 is the same as that of the stator 1 described in the first embodiment.
  • the coil portions U1, U3, U5, the coil portions V1, V3, V5, and the coil portions W1, W3, W5 are connected by a star connection to form the star connection portion 101.
  • the coil portions U2, U4, U6, the coil portions V2, V4, V6, and the coil portions W2, W4, W6 are connected by a star connection to form the star connection portion 102.
  • the star connection portion 101 and the star connection portion 102 are connected in parallel.
  • the coil group of the star connection portion 101 (coils U1, U3, U5, coil portions V1, V3). , V5, and coil sections W1, W3, W5) and the coil group (coil section U2, U4, U6, coil section V2, V4, V6, and coil section W2, W4, W6) of the star connection section 102.
  • the current is not evenly divided, resulting in uneven current.
  • the current flowing through the coil group with small inductance has a large amplitude and the phase advances.
  • the current flowing through the coil group having a large inductance has a small amplitude and a phase delay. Therefore, the peak value of the amplitude of the current flowing through each coil group becomes large, and the loss generated by the current and the resistance, that is, the copper loss increases.
  • FIG. 21 is a graph showing the analysis result of the loss increase (W) due to the difference in the inductance of the coil group in the first and second embodiments and the third comparative example.
  • the vertical axis shows the loss increase (W) due to the difference in inductance obtained by analysis.
  • the horizontal axis shows the first and second embodiments and the third comparative example.
  • the rotation speed of the motor is 60 rps and the torque is 15 Nm.
  • the outer layer coil portion and the inner layer coil portion are evenly included in both the star connection portions 101 and 102, so that the current flowing through the coil group of the star connection portion 101 and the star connection portion 102 It can be seen that the imbalance with the current flowing through the coil group can be further reduced and the increase in copper loss can be effectively suppressed.
  • FIG. 22 is a cross-sectional view showing the compressor 300.
  • the compressor 300 is a scroll compressor, and connects the airtight container 307, the compression mechanism 305 arranged in the airtight container 307, the electric motor 100 for driving the compression mechanism 305, and the compression mechanism 305 and the electric motor 100. It includes a shaft 56 and a subframe 308 that supports the lower end of the shaft 56 (that is, the end opposite to the compression mechanism 305 side).
  • the compression mechanism 305 includes a fixed scroll 301 having a spiral portion, a swing scroll 302 having a spiral portion forming a compression chamber between the spiral portion of the fixed scroll 301, and a compliance frame 303 holding the upper end portion of the shaft 56. And a guide frame 304 which is fixed to the closed container 307 and holds the compliance frame 303.
  • a suction pipe 310 penetrating the closed container 307 is press-fitted into the fixed scroll 301. Further, the closed container 307 is provided with a discharge pipe 311 for discharging the high-pressure refrigerant gas discharged from the fixed scroll 301 to the outside.
  • the discharge pipe 311 communicates with an opening (not shown) provided between the compression mechanism 305 of the closed container 307 and the electric motor 100.
  • the motor 100 is fixed to the closed container 307 by fitting the stator 1 into the closed container 307.
  • the configuration of the electric motor 100 is as described above.
  • a glass terminal 309 that supplies electric power to the electric motor 100 is fixed to the closed container 307 by welding.
  • the compressor 300 includes the motor 100 described in the first or second embodiment, the operating efficiency of the compressor 300 can be improved.
  • the scroll compressor has been described as an example of the compressor, but the motor described in the first and second embodiments may be applied to a compressor other than the scroll compressor.
  • FIG. 23 is a diagram showing an air conditioner 400 (refrigeration cycle device).
  • the air conditioner 400 includes a compressor 401, a condenser 402, a throttle device (decompression device) 403, and an evaporator 404.
  • the compressor 401, the condenser 402, the throttle device 403, and the evaporator 404 are connected by a refrigerant pipe 407 to form a refrigeration cycle. That is, the refrigerant circulates in the order of the compressor 401, the condenser 402, the drawing device 403, and the evaporator 404.
  • the compressor 401, the condenser 402 and the drawing device 403 are provided in the outdoor unit 410.
  • the compressor 401 is composed of the compressor 300 shown in FIG. 22.
  • the outdoor unit 410 is provided with an outdoor blower 405 that blows air to the condenser 402.
  • the evaporator 404 is provided in the indoor unit 420.
  • the indoor unit 420 is provided with an indoor blower 406 that blows air to the evaporator 404.
  • the operation of the air conditioner 400 is as follows.
  • the compressor 401 compresses and sends out the sucked refrigerant.
  • the condenser 402 exchanges heat between the refrigerant flowing in from the compressor 401 and the outdoor air, condenses the refrigerant, liquefies it, and sends it out to the refrigerant pipe 407.
  • the outdoor blower 405 supplies outdoor air to the condenser 402.
  • the throttle device 403 adjusts the pressure of the refrigerant flowing through the refrigerant pipe 407 by changing the opening degree.
  • the evaporator 404 exchanges heat between the refrigerant reduced to a low pressure by the throttle device 403 and the air in the room, causes the refrigerant to take away the heat of the air, evaporate (vaporize) it, and send it to the refrigerant pipe 407.
  • the indoor blower 406 supplies the air deprived of heat by the evaporator 404 into the room.
  • the compressor 401 (that is, the compressor 300) includes the motor described in the first or second embodiment, the operating efficiency of the air conditioner 400 can be improved.
  • the compressor having the motor of the first or second embodiment can also be used for other air conditioners or refrigeration cycle devices.
  • stator 1 stator, 2 coil, 2U U-phase coil (1st coil), 2V V-phase coil (2nd coil), 2W W-phase coil (3rd coil), 5 rotor, 6 inserter, 10 stator Iron core, 11 yoke part, 12 teeth, 13 slots, 50 rotor iron core, 51 magnet insertion holes, 55 permanent magnets, 56 shafts, 61 blades, 62 slits, 71 slot insulation film, 80U, 80V, 80W output terminals, 81 , 82, 83, 84, 85, 86 Wiring part, 87,88 Neutral point, 91,92,93,94 Phase-to-phase insulation film, 100 electric motor, 101,102 star connection part, 300 compressor, 305 compression mechanism, 307 Closed container, 400 air conditioner, 401 compressor, 402 condenser, 403 squeezer, 404 evaporator, 405 outdoor blower, 406 indoor blower, 407 refrigerant pipe, U1, U3, U5 coil part (outer layer coil part), U

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PCT/JP2020/005296 2020-02-12 2020-02-12 固定子、電動機、圧縮機、空気調和装置および固定子の製造方法 WO2021161409A1 (ja)

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Publication number Priority date Publication date Assignee Title
CN116260279A (zh) * 2023-02-22 2023-06-13 东莞市懋胜电子实业有限公司 一种节能三相无刷直流电机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62250851A (ja) * 1986-04-23 1987-10-31 Yaskawa Electric Mfg Co Ltd 永久磁石同期機形モ−タ
JPS6358859U (enrdf_load_stackoverflow) * 1986-10-01 1988-04-19
JPH05191940A (ja) * 1992-01-10 1993-07-30 Toshiba Corp 三相１２極電機子巻線
JP2005117751A (ja) * 2003-10-06 2005-04-28 Chubu Electric Power Co Inc 電力貯蔵フライホイール装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62250851A (ja) * 1986-04-23 1987-10-31 Yaskawa Electric Mfg Co Ltd 永久磁石同期機形モ−タ
JPS6358859U (enrdf_load_stackoverflow) * 1986-10-01 1988-04-19
JPH05191940A (ja) * 1992-01-10 1993-07-30 Toshiba Corp 三相１２極電機子巻線
JP2005117751A (ja) * 2003-10-06 2005-04-28 Chubu Electric Power Co Inc 電力貯蔵フライホイール装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116260279A (zh) * 2023-02-22 2023-06-13 东莞市懋胜电子实业有限公司 一种节能三相无刷直流电机
CN116260279B (zh) * 2023-02-22 2023-10-31 东莞市懋胜电子实业有限公司 一种节能三相无刷直流电机

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