US 12,249,889 B2
Magnetic-geared motor with divisional spacers
Yuji Takizawa, Tokyo (JP); Haruyuki Kometani, Tokyo (JP); Ryoji Miyatake, Tokyo (JP); Takuro Yamada, Tokyo (JP); and Kenji Tanaka, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/791,905
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 16, 2020, PCT No. PCT/JP2020/016672
§ 371(c)(1), (2) Date Jul. 11, 2022,
PCT Pub. No. WO2021/210119, PCT Pub. Date Oct. 21, 2021.
Prior Publication US 2022/0407402 A1, Dec. 22, 2022
Int. Cl. H02K 49/10 (2006.01); H02K 9/22 (2006.01)
CPC H02K 49/102 (2013.01) [H02K 9/223 (2021.01)] 10 Claims
OG exemplary drawing
 
1. A magnetic-geared motor comprising:
a stator including a stator coil and a stator permanent magnet;
a first rotor provided rotatably relative to the stator with a first gap from the stator, the first rotor including:
a plurality of magnetic pole pieces disposed so as to be arranged in a circumferential direction; and
a plurality of spacers made of nonmagnetic metal and respectively disposed between the plurality of magnetic pole pieces; and
a second rotor provided coaxially with the first rotor with a second gap from the first rotor, the second rotor including a plurality of rotor permanent magnets disposed so as to be arranged in the circumferential direction, wherein
each spacer includes:
a plurality of divisional spacers disposed apart from each other in an axial direction; and
a plurality of fastening tools, each fastening tool fastening two divisional spacers among the plurality of divisional spacers together in the axial direction, and
the plurality of divisional spacers and the plurality of fastening tools are electrically insulated from each other.