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:
May. 24, 2011
Filed:
Sep. 27, 2007
Fumito Komatsu, Shiojiri, JP;
Hideaki Osada, Shiojiri, JP;
Akira Tooyama, Shiojiri, JP;
Makoto Murakami, Shiojiri, JP;
Fumito Komatsu, Shiojiri, JP;
Hideaki Osada, Shiojiri, JP;
Akira Tooyama, Shiojiri, JP;
Makoto Murakami, Shiojiri, JP;
Yugen Kaisha K. R & D, Shiojiri, JP;
Yugen Kaisha Dijianet, Shiojiri, JP;
Abstract
An inexpensive, productivity-enhanced single-phase AC synchronous motor in which stabilized synchronous pull-in can be carried out by suppressing generation of counter torque during a starting operation. Starting operation is performed while the energizing range of motor current is suppressed such that the energizing direction of motor current waveform lagging in a phase behind the output waveform from a detection sensor () is switched at at least the zero cross point of the output waveform from the sensor when the number of revolutions of a permanent magnet rotor () reaches a predetermined number of revolutions in the vicinity of the synchronous number of revolutions.