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. 20, 2026
Filed:
Oct. 21, 2022
Hitachi, Ltd., Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
The present invention adjusts the surge voltage of a switching element to a prescribed value or lower while reducing switching loss in accordance with an operation condition. The present invention includes a gate driving circuit unit that drives a semiconductor switching element and a feedback current control unit that applies, to a gate G of the semiconductor switching element, a feedback current which is calculated by multiplying the change rate of electricity applied by the gate driving circuit unit to the semiconductor switching element by a prescribed gain, in which the change rate of electricity is the time change rate of the voltage and/or current applied to the semiconductor switching element; and the feedback current control unit adjusts the surge voltage of the semiconductor switching element by changing the gain in accordance with an operation condition of the semiconductor switching element.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile