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:
Oct. 14, 2008
Filed:
Jan. 29, 2003
Boris A. Maslov, Reston, VA (US);
Matthew G. Feemster, Severna Park, MD (US);
Guohui Yuan, Greenbelt, MD (US);
Boris A. Maslov, Reston, VA (US);
Matthew G. Feemster, Severna Park, MD (US);
Guohui Yuan, Greenbelt, MD (US);
Matra Manufacturing & Services SAS, Elancourt, FR;
Abstract
A control system for a multiphase permanent magnet motor having a controller for producing a control signal to energize each phase winding. The controller includes a current value calculator for determining a value of phase current advanced in phase with respect to back-EMF by a phase advance angle, and a phase advance optimization circuit for producing a value of the phase advance angle optimized so as to maximize output torque of the motor and mimimize the phase current. The phase advance optimization circuit determines the phase advance angle optimized for each phase of the motor.