The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2026
Filed:
Aug. 04, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Masanori Sawahata, Tokyo, JP;
Masahiro Hori, Tokyo, JP;
Hideaki Goto, Hitachinaka, JP;
Takaki Itaya, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
An object of the present invention is to provide a rotary electric machine in which damage of a magnet is suppressed and cooling performance of the magnet is improved. The present invention includes a rotation shaft, a rotor, and core end membersandconnected to end portions of the rotor. The rotorincludes a magnet, a rotor core, and interposed membersandinterposed between the magnetand the rotor core. In the rotor core, a magnet insertion holefor disposing the magnetand flux barriersandare formed. The rotation shaftis provided with a first flow paththrough which a refrigerant flows. The core end membersandare provided with a second flow pathjoining the first flow pathand the flux barrier. The interposed membersandare provided along the axial direction such that a cooling flow path for the refrigerant is formed on both facing surfaces of the central portion of the magnetin the axial direction, which are long sides of a rectangular cross section.