Patent ID: 6433503
Filing Date: 2002-08-13
Classification: H02K,H02P

Abstract:
A synchronous motor and control circuit therefor comprising a stator having a plurality of stator poles, a corresponding plurality of coils wound around the stator poles, a rotor having magnets that provide magnetic regions to the rotor, a plurality of rotor position detectors disposed on the stator poles and a rotor driving control circuit coupled to the rotor position detectors and controlling the timing of rotor driving signals to be supplied to the respective coils for each respective phase, characterized in that:the respective rotor position detectors are each disposed at a position that is advanced by an electrical angle of 30Â° in one rotating direction from a central position of each stator pole, and wherein the rotor driving control circuit uses a first logic to generate rotor driving signals to rotate the rotor in a forward direction and the rotor driving control circuit uses a second logic to generate rotor driving signals to rotate the rotor in a reverse direction.