JPWO2022064624A5 - - Google Patents

Description

The stator according to the present disclosure includes a stator core having an outer circumference and an inner circumference both centered on the axis, a first slot and a second slot opening to the inner circumference, and a stator core wound with distributed winding, It has a first coil inserted in the first slot and a second coil wound on the stator core by distributed winding and inserted in the second slot. A radial length L1 about the axis of the first slot is longer than a radial length L2 of the second slot. The diameter D1 of the first coil is larger than the diameter D2 of the second coil. In the plane perpendicular to the axis, the cross-sectional area A1 of the first slot and the cross-sectional area A2 of the second slot satisfy 0.64≦A2/A1<1.

Claims (22)

a stator core having an outer periphery and an inner periphery both centered on the axis, and having a first slot and a second slot opening to the inner periphery;
a first coil wound on the stator core by distributed winding and inserted into the first slot;
a second coil wound on the stator core by distributed winding and inserted into the second slot;
has
the radial length L1 of the first slot about the axis is longer than the radial length L2 of the second slot;
The diameter D1 of the first coil is larger than the diameter D2 of the second coil,
In a plane perpendicular to the axis, the cross-sectional area A1 of the first slot and the cross-sectional area A2 of the second slot satisfy 0.64≦A2/A1<1.
stator. The stator according to claim 1, wherein the space factor SF1 of the first coil in the first slot is the same as the space factor SF2 of the second coil in the second slot. The stator according to claim 1, wherein a space factor SF1 of the first coil in the first slot is lower than a space factor SF2 of the second coil in the second slot. The stator according to claim 1, wherein a space factor SF1 of the first coil in the first slot is higher than a space factor SF2 of the second coil in the second slot. 5. Any one of claims 1 to 4, wherein the cross-sectional area A1 of the first slot and the cross-sectional area A2 of the second slot satisfy 0.78≦A2/A1<1 in a plane perpendicular to the axis. or the stator according to claim 1. 5. Within a plane perpendicular to the axis, the cross-sectional area A1 of the first slot and the cross-sectional area A2 of the second slot satisfy 0.64≦A2/A1≦0.89. A stator according to any one of . 5. Within a plane perpendicular to the axis, the cross-sectional area A1 of the first slot and the cross-sectional area A2 of the second slot satisfy 0.86≦A2/A1≦0.92. A stator according to any one of . The stator according to any one of claims 1 to 7 , wherein a notch is formed on the outer circumference of the stator core. The stator according to any one of claims 1 to 7 , wherein cutouts are formed at four or six locations in the outer circumference of the stator core in the circumferential direction about the axis. The stator core further has a third slot in which the radial length L3 is shorter than the length L2,
The stator according to any one of claims 1 to 9 , further comprising a third coil wound around the stator core with distributed winding and inserted into the third slot. The stator according to claim 10 , wherein the diameter D3 of the third coil is smaller than the diameter D2 of the second coil. The stator according to claim 10 or 11 , wherein the first coil, the second coil, and the third coil are Y-connected or delta-connected. a stator according to any one of claims 1 to 12 ;
and a rotor disposed radially inside the stator. The electric motor according to claim 13 , wherein the number of said first slots or the number of said second slots is the same as the number of poles of said rotor. The number of poles of the rotor is 6,
The electric motor according to claim 14 , wherein the total number of slots including the first slots and the second slots of the stator core is eighteen. The number of poles of the rotor is 4,
The electric motor according to claim 14 , wherein the total number of slots including the first slots and the second slots of the stator core is twelve. The number of poles of the rotor is 8,
15. The electric motor according to claim 14 , wherein a total number of slots including said first slots and said second slots of said stator core is 24. the rotor has at least one permanent magnet per magnetic pole;
The electric motor according to any one of claims 13 to 17 , wherein the permanent magnets are rare earth magnets or ferrite magnets. an electric motor according to any one of claims 13 to 18 ;
and a compression mechanism driven by the electric motor. A refrigeration cycle apparatus comprising the compressor according to claim 19 , a condenser, a decompression device, and an evaporator. A stator core having an outer periphery and an inner periphery both centered on an axis, and having a first slot and a second slot opening to the inner periphery, wherein the first slot extends radially about the axis preparing a stator core whose length L1 is longer than the radial length L2 of the second slot;
inserting a first coil into the first slot from the inner peripheral side;
and inserting a second coil into the second slot from the inner peripheral side,
The diameter D1 of the first coil is larger than the diameter D2 of the second coil,
In a plane perpendicular to the axis, the cross-sectional area A1 of the first slot and the cross-sectional area A2 of the second slot satisfy 0.64≦A2/A1<1.
A manufacturing method of a stator. 22. The method of manufacturing a stator according to claim 21 , wherein an inserter is used in the step of inserting the first coil into the first slot and the step of inserting the second coil into the second slot.