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. 24, 2006
Filed:
Aug. 11, 2005
Applicants:
Ting-chung Hsieh, Taoyuan, TW;
Shih-chieh Liao, Taoyuan, TW;
Inventors:
Ting-Chung Hsieh, Taoyuan, TW;
Shih-Chieh Liao, Taoyuan, TW;
Assignee:
Delta Electronics, Inc., Taoyuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A controlling method of a motor state described herein detects the motor operation in a regeneration state or a motor state. The output frequency value of an AC motor drive is calculated and adjusted to stabilize the voltage of a DC bus such that over-voltage protection is avoided. Therefore, a stable load current is obtained and the time for slowing down the motor is shortened.