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:
May. 16, 2000
Filed:
Jun. 23, 1999
Jurgen Halfmann, Herzogenrath, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a brushless d.c. motor having a commutation circuit for the commutation of phase currents in order to generate a given commutation angle in a given mode of operation of the d.c. motor. In order to guarantee a satisfactory performance of the motor for all modes of operation the commutation circuit is switched between a plurality of modes in which different commutation angles are generated with a switching frequency which is substantially higher than the operating frequency of the motor. The invention is particularly suitable for the use in brushless d.c. motors for domestic appliances such as food processors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile