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. 08, 2006
Filed:
Jul. 27, 2005
Yasunori Yamamoto, Hirakata, JP;
Hideaki Mori, Nishinomiya, JP;
Shinichi Kuroshima, Ibaraki, JP;
Hideki Nishino, Takatsuki, JP;
Taishi Iwanaga, Nagaokakyo, JP;
Yasunori Yamamoto, Hirakata, JP;
Hideaki Mori, Nishinomiya, JP;
Shinichi Kuroshima, Ibaraki, JP;
Hideki Nishino, Takatsuki, JP;
Taishi Iwanaga, Nagaokakyo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A motor driving apparatus has a driver circuit configuration capable of individually adjusting three phase coil currents. Coil current waveforms are formed to have a total of three phase shaft direction forces to be zero in compliance with predetermined mathematical expressions, and thus, three phase coil current profiles can be made independent of one another, and vibration-causing factors attributed to the fact that a certain phase is in an non-energized state are corrected by adjusting the current profiles of the other phases. Consequently, the vibration and the noise can be reduced.