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. 26, 2002
Filed:
Jul. 18, 2000
Johannes Petrus Maria Bahlmann, Veldhoven, NL;
Henricus Marinus Van Hout, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A control unit ( ) according to the invention for controlling a brushless motor ( ) includes position detection means ( ) for generating a signal (S ) which is indicative of the position of the motor ( ). The control unit ( ) further includes supply means ( ) for energizing two or more coils ( ) of the motor ( ) and output terminals ( ) for electrically coupling the coils ( ) to the supply means ( ). The position detection means ( ) include polarity detection means (T , D , T , D , A ) for generating a polarity signal (S ) which is a measure of the direction of the current (Ia) through at least one of the coils ( ). The control unit ( ) in accordance with the invention is particularly suitable for use in a device for reading and/or writing an information carrier ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile