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:
Oct. 01, 2024
Filed:
Aug. 04, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Kenji Fujiwara, Tokyo, JP;
Tetsuya Kojima, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
Provided is a gradationally controlled inverter formed by series-connection between: a main inverter circuitry which has main inverter arms for outputting AC voltages for respective phases, and to which a voltage of a DC source is applied through a DC busbar; and a sub-inverter circuitry having three single-phase sub-inverters. Each of short-circuit switches is connected between an input terminal and an output terminal of a corresponding one of the sub-inverters. At the time of a failure of the sub-inverter, a bypass for current is formed for only the failure phase by causing short-circuiting at the short-circuit switch connected to the sub-inverter, and only the main inverter arm for the failure phase is operated as a three-level inverter.