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:
Jan. 20, 2026
Filed:
Feb. 21, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Ryoichi Inada, Tokyo, JP;
Nobuyasu Kanekawa, Tokyo, JP;
Hiroshi Nakano, Tokyo, JP;
Satoru Shigeta, Hitachinaka, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
A power conversion device includes a power conversion circuit in which upper and lower arm circuits in which switching elements are connected in series are connected in parallel for at least three phases, a plurality of fuses that are connected in series with the switching elements of the respective phases of the power conversion circuit and blown at a predetermined rated current or more, a short-circuit failure location determination unit that determines a short-circuit failure location of the switching element, and a fuse blowout-time current control unit that controls driving of another switching element different from the switching element so that a current flowing through the switching element determined to be the short-circuit failure location by the short-circuit failure location determination unit becomes equal to or more than the rated current of the fuse.