Title:
ROTARY ELECTRIC MACHINE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/176771
Kind Code:
A1
Abstract:
Provided is a method for manufacturing rotary electric machines (10, 110) comprising: field magnetons (20, 120) having magnets (23, 123-125) forming a plurality of magnetic poles having alternating polarities in the circumferential direction; and armatures (30, 130) having multi-phase armature windings (33, 133), wherein either the field magnetons or the armatures are configured as a rotor, and the magnets are configured as laminated bodies of divided magnets (24) divided into a plurality of pieces in the axial direction of the rotor. The manufacturing method comprises: a sintering step for sintering a compact of compression-molded magnet powder to obtain a sintered body (50) having a pair of facing flat surfaces (50a); a diffusion treatment step for applying, to the sintered body, a grain boundary diffusion treatment for diffusing heavy rare earth elements into the sintered body by heating the sintered body after attaching deposits containing heavy rare earth elements to the flat surfaces of the sintered body; and a step for producing the laminated bodies of the divided magnets by bringing the flat surfaces of the sintered body, subjected to the grain boundary diffusion treatment, into contact with each other.
Inventors:
TAKAHASHI YUKI (JP)
Application Number:
PCT/JP2022/005326
Publication Date:
August 25, 2022
Filing Date:
February 10, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02K15/03
Foreign References:
| JP2020039240A | 2020-03-12 | |||
| JP2007258455A | 2007-10-04 | |||
| JP2018107899A | 2018-07-05 | |||
| JP2018148754A | 2018-09-20 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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