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, 2007
Filed:
Feb. 25, 2005
Eddy Ying Yin Ho, Torrance, CA (US);
Eddy Ying Yin Ho, Torrance, CA (US);
International Rectifier Corporation, El Segundo, CA (US);
Abstract
A startup failure detection system provides an indication of motor startup failure based on a flux amplitude signal value. The flux amplitude signal is derived from motor flux estimations in combination with a rotor angle estimation. The flux amplitude signal value is compared to an upper and lower threshold value, and a startup failure is indicated if the flux amplitude signal value is outside the range determined by the upper and lower threshold value. The motor drive system can be set to attempt a restart when a motor drive startup failure is detected, with the retrial current, duration and the total number of retrials being user selectable.