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:
Sep. 05, 2006
Filed:
Aug. 08, 2005
Yu-kai Chen, Chiai, TW;
Tsai-fu Wu, Chiai, TW;
Wen-yang Wang, Nantou, TW;
Yung-chun Wu, Kaohsiung, TW;
Chin-hsiung Chang, Taichung, TW;
Yu-Kai Chen, Chiai, TW;
Tsai-Fu Wu, Chiai, TW;
Wen-Yang Wang, Nantou, TW;
Yung-Chun Wu, Kaohsiung, TW;
Chin-Hsiung Chang, Taichung, TW;
Fego Precision Industrial Co., Ltd., Taichung, TW;
Abstract
A motor variator and a driving method thereof are provided for controlling the operating speed of a fan, which employ an alternate current chopper to change the working cycle and the rotary speed of a stepless motor. The motor variator includes a high-frequency alternate current chopper connected to an induction coil of an induction motor, an alternate current power supply connected to the high-frequency alternate current chopper and a controller connected to the high-frequency alternate current chopper for outputting a switch signal to the high-frequency alternate current chopper, such that the high-frequency alternate current chopper is controlled by the switch signal to perform a chopper action for the alternate current power supply and output a drive voltage, so as to change the rotary speed of the induction motor.