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. 22, 2003
Filed:
Aug. 18, 2000
Paolo Menegoli, San Jose, CA (US);
Ender T. Eroglu, Campbell, CA (US);
Whitney H. Li, San Jose, CA (US);
STMicroelectronics, Inc., Carrollton, TX (US);
Abstract
A method and apparatus are disclosed for controlling the operation of a polyphase motor, and particularly to determining whether the motor is spinning. The method and apparatus include initially sensing an electrical characteristic of a single phase winding of the motor. Having sensed values of the electrical characteristic, a determination is made as to whether or not the motor's rotor is spinning. Upon a determination that the rotor is not spinning, a spin-up operation is performed to bring the spin of the rotor to operable spin speeds. Otherwise, a resynchronization operation is performed.