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:
Jan. 29, 2013
Filed:
Dec. 16, 2009
Masaki Tagome, Osaka, JP;
Makoto Kitabatake, Nara, JP;
Shun Kazama, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In a power conversion circuit operating with high frequency, an off-voltage control circuitof a lower-arm gate drive circuitcontrols the output voltage of a gate drive power supplyto change the output voltage to a voltage lower than a predetermined off voltage during a time period from termination of turn-off operation of a lower armuntil start of turn-on operation of an upper arm, and thereafter return the output voltage to the predetermined off voltage immediately after termination of the turn-on operation of the upper arm. With this control, short-circuiting through the upper and lower arms occurring due to a high voltage change dv/dt can be avoided, and the life of a switching element constituting the power conversion circuit improves, increasing the reliability of the power conversion circuit.