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:
Oct. 28, 2003
Filed:
Apr. 24, 2002
Makoto Gotou, Nishinomiya, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A motor comprising: Q-phase windings; voltage supplying unit; power supplying unit having Q first power transistors and Q second power transistors for supplying a power to said Q-phase windings; voltage detecting unit; state shifting unit; activation control unit; and switching operation unit. The switching operation unit includes switching control circuit for producing a main switching pulse and an auxiliary switching pulse, said switching operation circuit executing high-frequency switching operation of at least one second power transistor among said Q second power transistors responding with said auxiliary switching pulse signal when two first power transistors among said Q first power transistors simultaneously execute high-frequency switching operation responding with said main switching pulse signal while at least another second power transistor among said Q second power transistors executes an ON operation.