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. 31, 2010
Filed:
Aug. 17, 2007
Akihiko Hoda, Kashiwa, JP;
Akihiko Hoda, Kashiwa, JP;
Oriental Motor Co., Ltd., Taito-Ku, Tokyo, JP;
Abstract
The present invention restrains high frequency leakage current while reducing ripples of current flowing through a motor having one set and another set of independent phase windings. A plurality of inverter type drive means drives the respective phase windings and a PWM control means controls the respective inverter type drive means, by a switching sequence connecting one end of all phase windings including the other set to the negative side of the power supply when both ends of the phase winding included in one set are connected to the positive side of the power supply and connecting at least one end of all phase windings included in the other set to the positive side of the power supply when both ends of at least one phase winding included in one set are connected to the negative side of the power supply.