US 12,395,055 B2
Electric motor with double stators
Yu-Hsun Wu, Taipei Clty (TW); Kuo-Lin Chiu, Taoyuan (TW); Ya-Ling Chang, Hsinchu County (TW); and Chun-Chieh Chang, Taipei (TW)
Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed by Industrial Technology Research Institute, Hsinchu (TW)
Filed on Apr. 12, 2023, as Appl. No. 18/133,759.
Claims priority of application No. 112100923 (TW), filed on Jan. 9, 2023.
Prior Publication US 2024/0235349 A1, Jul. 11, 2024
Int. Cl. H02K 16/04 (2006.01); H02K 1/02 (2006.01); H02K 1/276 (2022.01)
CPC H02K 16/04 (2013.01) [H02K 1/02 (2013.01); H02K 1/2766 (2013.01); H02K 2201/03 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An electric motor with double stators, comprising:
a first stator;
a second stator; and
a rotor assembly, disposed in a radial direction between the first stator and the second stator, including a rotor body, a plurality of first rotor slots, a plurality of second rotor slots, a plurality of first magnets and a plurality of second magnets, a first air gap being formed between the rotor body and the first stator, a second air gap being formed between the rotor body and the second stator, the positions of the plurality of first rotor slots being not identical to those of the plurality of second rotor slots, each of the plurality of first rotor slots being furnished thereinside with one of the plurality of first magnets, each of the plurality of second rotor slots being furnished thereinside with one of the plurality of second magnets, a material for producing the plurality of first magnets being different to that for producing the plurality of second magnets, remanence of each of the plurality of first magnets being ranged within 0.8˜1.3 tesla, remanence of each of the plurality of second magnets being ranged within 0.3˜0.5 tesla;
wherein the rotor body has an inner circular surface and an outer circular surface, the plurality of first rotor slots include a plurality of inner rotor slots and a plurality of outer rotor slots, the plurality of inner rotor slots are sequentially arranged close to the inner circular surface, the plurality of outer rotor slots are sequentially arranged close to the outer circular surface, and an inner end of each of the plurality of second rotor slots is disposed between neighboring two of the plurality of inner rotor slots while an outer end thereof is disposed between neighboring two of the plurality of outer rotor slots.