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:
Apr. 21, 2025
Filed:
May. 17, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Masahiro Hori, Tokyo, JP;
Masanori Sawahata, Tokyo, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Improving the coercive force of magnets used in a rotary electric machine by arranging magnets such that a q-axis side portion is located on an outer diameter side with respect to a d-axis side portion, and a magnet thickness Ti on an inner diameter side (d-axis side) of a rotor core is formed to be larger than a magnet thickness To on the outer diameter side (q-axis side) of the rotor core. An axial space is formed in the magnets such that when the lateral cross section of each of the magnets is divided into an outer diameter side regionand an inner diameter side regionin a manner that the lateral cross section areas are equal to each other with a circumference C around a rotation center as a boundary, and a space density of the axial space in the inner diameter side regionis larger than a space density of the axial space in the outer diameter side region