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. 31, 2017
Filed:
Nov. 02, 2011
Yosuke Shinomoto, Tokyo, JP;
Michio Yamada, Tokyo, JP;
Kazunori Hatakeyama, Tokyo, JP;
Takuya Shimomugi, Tokyo, JP;
Yosuke Shinomoto, Tokyo, JP;
Michio Yamada, Tokyo, JP;
Kazunori Hatakeyama, Tokyo, JP;
Takuya Shimomugi, Tokyo, JP;
MITSUBISHI CORPORATION, Tokyo, JP;
Abstract
A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on.