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:
Jun. 28, 2011
Filed:
Dec. 03, 2008
Sam J. B. W. Vermeir, Mechelen, BE;
Sam J. B. W. Vermeir, Mechelen, BE;
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
A control circuit () for a brushless direct current (DC) motor () includes a current drive circuit (), a current loop regulator (), and a commutation loop regulator (). The current drive circuit () is adapted to drive the brushless DC motor () in a first polarity or a second polarity selectively in response to a control signal, and senses a current through the brushless DC motor () to provide a current sense signal. The current loop regulator () varies a duty cycle of the control signal to regulate the current in response to the current sense signal, and regulates the polarity of the current based on a state of a polarity signal. The commutation loop regulator () regulates a transition of said polarity signal in response to a comparison of a pre-commutation duty cycle value and a post-commutation duty cycle value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile