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:
Mar. 22, 2016
Filed:
Mar. 07, 2012
Nobuyuki Hattori, Osaka, JP;
Akihiro Ohori, Osaka, JP;
Hiroki Munechika, Osaka, JP;
DAIHEN Corporation, Osaka, JP;
Abstract
A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu, Xv, and Xwfrom line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu, Xv, and Xw. The command value signals Xu, Xv, and Xware continuously at '0' for a predetermined period, and are continuously at '2' for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.