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:
Jun. 30, 2020
Filed:
Oct. 27, 2016
National University Corporation Hokkaido University, Sapporo-shi, JP;
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-ku, JP;
Satoshi Ogasawara, Sapporo, JP;
Shunsuke Ohara, Sapporo, JP;
Masatsugu Takemoto, Sapporo, JP;
Yushin Yamamoto, Chuo-ku, JP;
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Sapporo-shi, JP;
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Chuo-ku, JP;
Abstract
A power conversion device that converts electric power by having a power semiconductor element perform a switching operation includes a voltage detector detecting a common mode voltage generated in the switching operation of the power semiconductor element, a voltage control power supply that generates a voltage opposite in polarity to and as high as the common mode voltage with a circuit that amplifies power of the common mode voltage detected by the voltage detector, and a voltage superimposition structure canceling the common mode voltage not lower than a switching frequency generated in the switching operation of the power semiconductor element, by superimposing the voltage generated by the voltage control power supply on an output from the power conversion device.