Patent ID: 6445154
Filing Date: 2002-09-03
Classification: H02P

Abstract:
A method for detecting a rotor magnetic pole position in a synchronous motor, said synchronous motor including a rotor in which magnetic poles are arranged, a stator in which exciting windings are provided and a sensor for detecting the position of this rotor, comprising:supplying an electrical current to a prescribed excitation phase of said stator; obtaining a direction of movement of said rotor upon said supply of said electrical current; estimating a rotor magnetic pole position based on the obtained direction of movement; and specifying a prescribed excitation phase for supplying a subsequent electrical current based on the estimated magnetic pole position of said rotor repeating said supplying of the electrical current, obtaining the direction of movement, estimating the rotor magnetic pole position, and specifying the prescribed excitation phase for the subsequent electrical current, to detect the rotor magnetic pole position.