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:
Jul. 03, 2001
Filed:
Jan. 21, 2000
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In the present invention, a Q-phase motor, which electronically switches current paths to plural-phase windings, comprises waveform shaping signal producing device for producing Q-phase waveform shaping signals having a conduction width larger than an electric angle of 360/Q degrees and superimposed signal producing device for superimposing signals to the waveform shaping signals. The superimposed signal producing device comprises superimposed timing producing device for producing superimposed timing signals which are output in a period shorter than a conduction period of the waveform shaping signals in a conduction period of the waveform shaping signals, synchronous rectifying control device for controlling the timing for synchronous rectification, and superimposed signal composing device for composing the signals output from the synchronous rectifying control device with the superimposed timing signals.