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:
May. 07, 2024
Filed:
Jul. 31, 2020
Hitachi Astemo, Ltd., Hitachinaka, JP;
Norio Murayama, Hitachinaka, JP;
Takeshi Yoshida, Hitachinaka, JP;
Takahiro Nishida, Hitachinaka, JP;
Itsuro Nomura, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
An object of the present invention is to provide a power conversion device capable of specifying a failure location of an inverter in detail when an attempt of active discharge fails. There are provided an arithmetic operation circuitthat outputs a discharge instruction to control a discharge operation based on a voltage between both ends of a discharge circuit, and an output circuitthat outputs a drive signal based on the control signal. The arithmetic operation circuitmonitors an amount of the decreased voltage between both the ends of the discharge circuit, an LV read back signal being an output of the arithmetic operation circuit, and an HV read back signal being an output of the output circuit, and specifies a failure location.