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:
Apr. 28, 2020
Filed:
Jun. 03, 2019
Fuji Electric Co., Ltd., Kanagawa, JP;
Kunio Matsubara, Hino, JP;
Tsuyoshi Nagano, Hino, JP;
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Abstract
In recent years, it has been desired to further shorten the dead time. Provided is a driving device that drives on/off a main switching element to which a free wheeling diode is anti-parallel connected, wherein the driving device includes a determination unit configured to output a determination signal indicating whether free wheeling current is flowing from a source terminal to a drain terminal of the main switching element; and a drive control unit configured to reduce a switching speed when the main switching element is driven from an on-state to an off-state on condition that the determination signal indicating that the free wheeling current is flowing is output.