US 12,136,859 B2
Electric machine
Arash Hassanpour, Tustin, CA (US)
Assigned to Optiphase Drive Systems, Inc., Southlake, TX (US)
Filed by Optiphase Drive Systems, Inc., Keller, TX (US)
Filed on Feb. 7, 2022, as Appl. No. 17/665,665.
Claims priority of provisional application 63/146,652, filed on Feb. 7, 2021.
Prior Publication US 2022/0271591 A1, Aug. 25, 2022
Int. Cl. H02K 3/18 (2006.01); H02K 1/16 (2006.01); H02K 1/24 (2006.01)
CPC H02K 3/18 (2013.01) [H02K 1/165 (2013.01); H02K 1/24 (2013.01); H02K 2213/03 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A multi-phase electric machine, comprising;
a stator core; and
a rotor disposed within the stator core; the rotor having poles thereon; the stator core including non-integer slots being circumferentially arranged around the rotor; a plurality of windings disposed in the stator core; wherein the windings are arranged with the non-integer slots per pole per phase thereby reducing third harmonics of a back-EMF substantially to zero;
wherein a winding factor distribution of the third harmonic is a zero.