Title:
ROTARY ELECTRIC MACHINE
Document Type and Number:
Japanese Patent JP2022188880
Kind Code:
A
Abstract:
To provide a rotary electric machine capable of torque improvement and efficiency improvement in accordance with a processing method capable of minimizing an eddy current loss that is generated on a rotor surface, and minimizing a thickness of a bridge part.SOLUTION: The present invention relates to a rotary electric machine comprising a rotor including a rotor core in which a plurality of magnet holes storing a plurality of magnets therein is formed, and a stator opposed to the rotor with a predetermined cavity interposed therebetween. The rotor core includes a bridge part in which a distance between the magnet hole and a face opposed with the stator becomes shortest in the vicinity of a (q) axis that is a magnetic pole boundary of the rotor. When surface roughness of the face of the bridge part opposed with the stator is defined as R1 and surface roughness of a face opposed with the stator in the vicinity of the (d) axis that is a magnetic pole center of the rotor is defined as R2, R1 and R2 are different.SELECTED DRAWING: Figure 3
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Inventors:
ITO MAKOTO
TAKAHASHI AKIFUMI
SUDO TETSUYA
TAKAHASHI AKIFUMI
SUDO TETSUYA
Application Number:
JP2021097140A
Publication Date:
December 22, 2022
Filing Date:
June 10, 2021
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02K1/27; B60K7/00
Attorney, Agent or Firm:
Polar Patent Attorney Corporation