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:
Sep. 10, 2002
Filed:
Apr. 16, 2001
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method to control a switched reluctance motor (SRM) with a first phase ( ) and a second phase ( ) comprises: aligning the rotor with the second phase ( ); at a first time point (t ), energizing the first phase ( ) with a phase voltage that is substantially constant; monitoring an increase of the phase current (I ) in the first phase ( ) until the phase current reaches a maximum ( ); monitoring a decrease ( ) of the first current (I ) until at a second time point (t ) the phase current (I ) reaches a minimum ( ) and starts to increase again ( ); de-energizing the first phase ( ) at a third time point (t ) that follows the second time point at (t ) at a predetermined time interval; and repeating energizing, monitoring and de-energizing for the second phase ( ) instead of the first phase ( ).