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:
Aug. 04, 2009
Filed:
Jul. 23, 2004
Yoshitaka Sugawara, Osaka, JP;
Katsunori Asano, Osaka, JP;
Mitsuru Matsukawa, Kyoto, JP;
Yoshifumi Minowa, Kyoto, JP;
Toshihiko Shikata, Kyoto, JP;
Yoshitaka Sugawara, Osaka, JP;
Katsunori Asano, Osaka, JP;
Mitsuru Matsukawa, Kyoto, JP;
Yoshifumi Minowa, Kyoto, JP;
Toshihiko Shikata, Kyoto, JP;
The Kansai Electric Power Co., Inc., Osaka, JP;
Nissin Electric Co., Ltd., Kyoto, JP;
Abstract
A problem to be solved by the present invention is to eliminate variation in potential in a turn-off time period of each GTO element, and to stabilize a gate drawing current by surely performing the turn-off of the GTO element. In an inverter apparatus having a three-phase inverter configured to include paired GTO elements an inverter control portion has a simultaneous switching prevention function of delaying a turn-on operation of each of the GTO elements which correspond to phases other than a phase corresponding to an optional one of the GTO elements and also correspond to an electrode opposite to an electrode corresponding to the optional one of the GTO elements by a predetermined time in a case where a turn-on command signal for turning on each of the GTO elements is generated within a predetermined time period since the turn-off of the optional one of the GTO elements.