US 12,176,775 B2
Stator winding structure and motor comprising same
Jun Zhu, Shanghai (CN); Jian Wang, Shanghai (CN); ShaoRui Huang, Shanghai (CN); JieBao Li, Shanghai (CN); HaoChun Li, Shanghai (CN); and YuanLiang Min, Shanghai (CN)
Assigned to SAIC MOTOR CORPORATION LIMITED, Shanghai (CN)
Appl. No. 17/778,643
Filed by SAIC MOTOR CORPORATION LIMITED, Shanghai (CN)
PCT Filed Dec. 31, 2019, PCT No. PCT/CN2019/130273
§ 371(c)(1), (2) Date May 20, 2022,
PCT Pub. No. WO2021/134387, PCT Pub. Date Jul. 8, 2021.
Prior Publication US 2022/0407378 A1, Dec. 22, 2022
Int. Cl. H02K 3/28 (2006.01); H02K 3/50 (2006.01)
CPC H02K 3/28 (2013.01) [H02K 3/50 (2013.01); H02K 2203/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stator winding structure for a motor, the motor being a three-phase AC motor having eight poles, comprising phases U, V and W; wherein each phase comprises four parallel-winding branches: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch, each parallel-winding branch having a head end and a tail end, the winding directions of the first and third parallel-winding branches being the same, and the winding directions of the second and fourth parallel-winding branches being the same and opposite to the winding directions of the first and third parallel-winding branches, the three-phase AC motor being capable of normal operation when being energized,
the stator winding structure being arranged on the stator core, the stator core comprising a plurality of slots, the stator winding comprising a plurality of U-shaped flat copper wires, wherein each U-shaped flat copper wire comprises: a first conductor, a second conductor substantially parallel to the first conductor, and a connecting part connecting the first conductor and the second conductor; wherein the connecting part of each U-shaped flat copper wire arranged in the motor is located on the same side relative to the motor,
wherein Q represents the number of slots of the stator core, the slots being numbered clockwise or counterclockwise; i represents a natural number satisfying 1≤i≤Q; q represents the number of slots per pole per phase; q=(Q/p)/3 and q=1, 2, 3 . . . and so on; L represents the number of layers of each slot, and where L is an even number and L=8+4*1, where 1=0, 1, 2, 3 . . . , and j is a natural number satisfying 1≤j≤L, and y represents the pitch; one layer in one slot corresponding to one conductor; and
wherein as seen from the side of the connecting part, two conductors of the U-shaped flat copper wire are connected as:
conductor of layer j in slot i being connected to conductor of layer j+1 in slot i+y in the case that j is odd and j+1, 3, 5 . . . L−1,
conductor of layer j in slot i being connected to conductor of layer j−1 in slot i−y in the case that j is even and j=2, 4, 6 . . . L,
as seen from the solder end of the motor, two conductors being soldered or joined with deflector to form a three-phase AC motor are connected as:
conductor of layer j in slot i being connected to conductor of layer j+1 or j−1 in slot i+y in the case that j=2, 4, 6 . . . L−2;
conductor of layer j in slot i being connected to conductor of layer j+1 or j−1 in slot i−y in the case that j=3, 5 . . . L−1;
conductor of layer j in slot i being connected to conductor of layer j−1 in slot i+y or to layer 1 in slot i+y+1 or i+y−1 in the case that j=L,
conductor of layer j in slot i being connected to conductor of layer j+1 in slot i−y or to layer L in slot i−y+1 or i−y−1 in the case that j=1,
where the value of i is a function of the phase of the winding and the branch number, and where i−y=i−y+Q when i−y<0 and i+y=i+y−Q when i+y>Q.