US 11,855,498 B2
Patterns for balanced stator windings in electric motor
Yateendra Deshpande, Sunnyvale, CA (US); Vivek Meenakshi Sundaram, Newark, CA (US); and Emad Dlala, Pleasanton, CA (US)
Assigned to Atieva, Inc., Newark, CA (US)
Filed by Atieva, Inc., Newark, CA (US)
Filed on Nov. 19, 2020, as Appl. No. 16/949,902.
Prior Publication US 2022/0158512 A1, May 19, 2022
Int. Cl. H02K 3/12 (2006.01); H02K 3/28 (2006.01); H02K 15/085 (2006.01); H02K 17/12 (2006.01)
CPC H02K 3/12 (2013.01) [H02K 3/28 (2013.01); H02K 15/085 (2013.01); H02K 17/12 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electric motor comprising:
a rotor having poles equaling a first number; and
a stator having slots equaling a second number, the stator having stator windings formed by conductors wound in a wave pattern around the stator, wherein a third number of the conductors are located in each of the slots, wherein the conductors form three balanced parallel paths through the slots, each of the conductors in the three balanced parallel paths undergoing a same number of pitch turns, each of the pitch turns being either a standard pitch turn or a nonstandard pitch turn, the standard pitch turn involving wrapping around slots equaling the second number divided by the first number, the nonstandard pitch turn involving wrapping around more or fewer slots than the standard pitch turn, wherein each of the three balanced parallel paths forms a repeating pattern throughout the slots;
wherein the repeating pattern comprises the nonstandard pitch turn occurring at every fourth pole, wherein the repeating pattern includes a first pattern in which the standard pitch turn involves wrapping around 12 slots and in which the nonstandard pitch turn involves wrapping around 13 slots, and wherein the repeating pattern further includes a second pattern in which the standard pitch turn involves wrapping around 12 slots and in which the nonstandard pitch turn involves wrapping around 9 slots.