Title:
ROTOR AND MOTOR
Document Type and Number:
Japanese Patent JP2022153918
Kind Code:
A
Abstract:
To provide a rotor and a motor that achieve further miniaturization and higher torque.SOLUTION: A rotor includes a rotor core having an inner core portion 31 arranged circumferentially on the radially outer side of a shaft and a plurality of outer core portions 32 arranged separately from each other along the radially outer side of the inner core portion along the circumferential direction, and magnets 40 arranged alternately with the outer core portions along the circumferential direction on the radially outer side of the shaft. The rotor core includes a first gap portion 33 located between the inner core portion and the outer core portion in the radial direction when viewed in the axial direction and located in the center of the outer core portion in the circumferential direction, a second gap portion 34 positioned radially inside the magnet and having a circumferential dimension shorter than the circumferential dimension of the magnet, and a bridge portion 42 connecting the inner core portion and the outer core portion. The two bridge portions are arranged in the circumferential direction with the second gap portion interposed therebetween, and from among the radially inner end faces of the magnet, the end on one side in the circumferential direction and the end on the other side in the circumferential direction are covered from the radially inner side.SELECTED DRAWING: Figure 4
Inventors:
KAWADA SHUSAKU
Application Number:
JP2021056692A
Publication Date:
October 13, 2022
Filing Date:
March 30, 2021
Export Citation:
Assignee:
NIDEC COPAL CORP
International Classes:
H02K1/27; H02K1/22
Attorney, Agent or Firm:
Shu Oikawa
Yuki Narita
Masahisa Matsumoto
Ancient city Satoshi
Yuki Narita
Masahisa Matsumoto
Ancient city Satoshi