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:
Mar. 18, 2008
Filed:
Nov. 21, 2005
Weizi Wang, Shanghai, CN;
Zhigan Wu, Shanghai, CN;
Wanbing Jin, Shanghai, CN;
Jianping Ying, Shanghai, CN;
Qiong Yuan, Shanghai, CN;
Shih-ming Huang, Taoyuan Shien, TW;
Wen-shi Huang, Taoyuan Shien, TW;
Weizi Wang, Shanghai, CN;
Zhigan Wu, Shanghai, CN;
Wanbing Jin, Shanghai, CN;
Jianping Ying, Shanghai, CN;
Qiong Yuan, Shanghai, CN;
Shih-Ming Huang, Taoyuan Shien, TW;
Wen-Shi Huang, Taoyuan Shien, TW;
Delta Electronics, Inc., Taoyuan Hsien, TW;
Abstract
A method for starting a motor having a stator, a rotor, a winding and an asymmetrical air gap is accomplished using several steps. The steps include: (a) providing the motor at standstill; (b) exciting the winding for a specific time period with a current impulse having a first amplitude to obtain a first specific position of the rotor with respect to the stator; (c) decreasing the first amplitude down to a second amplitude gradually by a controller to make the rotor to be positioned at a second specific position with respect to the stator after the specific time period, wherein the second amplitude is one of zero ampere and a specific value close to zero ampere, and the rotor is rotating close to the second specific position with an almost zero rotating speed when the second amplitude is reached.