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. 06, 2026
Filed:
Jan. 11, 2023
Mitsubishi Electric Corporation, Tokyo, JP;
Ryota Kondo, Tokyo, JP;
Yoshiaki Ishiguro, Tokyo, JP;
Kohei Onda, Tokyo, JP;
Hisatoshi Fukumoto, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
This power conversion device drives a semiconductor switching element through PWM control and performs conversion between DC and AC. A pulse width for the PWM control is set using a PWM carrier wave. With respect to a carrier frequency, a gate voltage of the semiconductor switching element, and a gate resistance thereof which are driving conditions for the semiconductor switching element, at a predetermined update timing, loss in the semiconductor switching element during a predetermined loss calculation period is obtained through calculation on the basis of the driving conditions at present. While the driving conditions are changed, processing of obtaining the loss during the loss calculation period through calculation is repeated a predetermined number of times, to determine the driving conditions that minimize the loss, and the semiconductor switching element is driven with the determined driving conditions.