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:
Mar. 03, 2020
Filed:
May. 08, 2018
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Yuki Ishikura, Nagaokakyo, JP;
Koichi Ueki, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A power conversion device includes a power conversion circuit that performs switching control of first and second semiconductor switches connected in series and converts an input direct current voltage into an alternating current voltage. A switching adjustment circuit includes a first capacitance addition circuit that increases an output capacitance of the first semiconductor switch. The first capacitance addition circuit includes a first capacitive element and a first switching unit connected in series and is connected in parallel to the first semiconductor switch. A first driving control circuit drives and controls the first capacitance addition circuit. The first driving control circuit turns on the first switching unit when the first semiconductor switch is turned off, increasing the output capacitance of the first semiconductor switch, and turns off the first switching unit when a predetermined time period elapses after the first semiconductor switch is turned off.