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:
Dec. 03, 2013
Filed:
Feb. 29, 2008
Hidetoshi Kitanaka, Chiyoda-ku, JP;
Hideo Okayama, Chiyoda-ku, JP;
Shinichi Furutani, Chiyoda-ku, JP;
Toshie Takeuchi, Chiyoda-ku, JP;
Mitsuru Tsukima, Chiyoda-ku, JP;
Hidetoshi Kitanaka, Chiyoda-ku, JP;
Hideo Okayama, Chiyoda-ku, JP;
Shinichi Furutani, Chiyoda-ku, JP;
Toshie Takeuchi, Chiyoda-ku, JP;
Mitsuru Tsukima, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Chiyoda-Ku, Tokyo, JP;
Abstract
An object is to provide a driving controller for an AC motor that can prevent generation of an excessive voltage between lines of a motor and between contacts of a motor cut-off contactor and a continuous arc between contacts of the motor cut-off contactor, regardless of the type of a fault occurred, even when a phase in which a current zero point is not generated and a phase in which a current zero point is generated coexist in a fault current that flows between an inverter and the motor. A control unit is configured to open a motor cut-off contactor not at a time when a state of a detected current is determined to be abnormal but at a time when the state of the current is determined to be normal, even when a basic contactor-close command MKC0 becomes off (L level).