US 12,149,137 B2
Electrical machine having a segmented stator or rotor
Ziad Azar, Sheffield (GB); Alexander Duke, Sheffield (GB); Liren Huang, Sheffield (GB); and Zi-Qiang Zhu, Sheffield (GB)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 17/770,065
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Oct. 9, 2020, PCT No. PCT/EP2020/078454
§ 371(c)(1), (2) Date Apr. 19, 2022,
PCT Pub. No. WO2021/078542, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 19204807 (EP), filed on Oct. 23, 2019.
Prior Publication US 2022/0393536 A1, Dec. 8, 2022
Int. Cl. H02K 3/28 (2006.01); F03D 9/25 (2016.01); H02K 7/18 (2006.01)
CPC H02K 3/28 (2013.01) [F03D 9/25 (2016.05); H02K 7/1838 (2013.01); F05B 2220/706 (2013.01); H02K 2213/12 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A segment for a stator or a rotor of an electrical machine comprising:
a segment body circumferentially extending about a longitudinal axis of the segment between two circumferential ends, the segment body including:
two end teeth at the two circumferential ends respectively, each end tooth having a first circumferential extension;
a plurality of N intermediate teeth protruding according to a radial direction orthogonal to the longitudinal axis from a yoke of the segment body to respective tooth radial ends, the plurality of N intermediate teeth being circumferentially distributed between the two end teeth, each of the plurality of N intermediate teeth having a second circumferential extension greater than the first circumferential extension, N being an integer greater than 1;
a plurality of N+1 slots circumferentially distributed between the two end teeth, each pair of circumferentially adjacent intermediate teeth having a slot interposed therebetween, the slot being provided between each end tooth and a respective circumferentially adjacent intermediate tooth;
a plurality of 2-pitch coils, the plurality of 2-pitch coils being in a number of N−1 and extending between an i-th slot and a (i+2)-th slot, the slots being progressively counted from one to the other of the two circumferential ends, i being an integer between 1 and N−1;
a plurality of 1-pitch coils between two circumferentially adjacent slots of the plurality of N+1 slots, a first 1-pitch coil being adjacent to a first end tooth and a second 1-pitch coil being adjacent to a second end tooth; and
a fractional slot winding including the plurality of 2-pitch coils and the plurality of 1-pitch coils;
wherein each of the plurality of N+1 slots include a bottom portion adjacent to the yoke and a top portion radially opposed to the bottom portion, the plurality of 2-pitch coils extending between a top portion of the i-th slot and a bottom portion of the (i+2)-th slot or between a bottom portion of the i-th slot and a top portion of the (i+2)-th slot.