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:
Feb. 04, 2020
Filed:
May. 14, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Kazuhiro Fujioka, Tokyo, JP;
Nobuhiro Kihara, Tokyo, JP;
Mai Nakada, Tokyo, JP;
Yoshihiro Takeshima, Tokyo, JP;
Yujiro Nakada, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
[Technical Problem] In a power conversion device for stepping up or stepping down the input voltage, when voltage converter become out of order, it is not possible to specify an IGBT element and a current sensor, which is in an extraordinary fault condition. [Solution to Problem] The power conversion device is configured to detect a voltage value of a smoothing condenser, connected in parallel to a load, where the load is to be connected to the power conversion device; detects, by a first current sensor, a current which flows through switching elements in a plurality of voltage converter; decides an abnormality of a switching element, by switching the switching element one by one; specifies the abnormality of the switching element; and specifies that the first current sensor is in an abnormal state, in a case where there is no abnormal state switching elements.