Patent ID: 6700284
Filing Date: 2004-03-02
Classification: F04D,H02K

Abstract:
A fan assembly comprising:a fan including a fan housing with an inlet and an outlet; and a switched reluctance fan motor mounted in said fan housing that includes: a shaft that is connected to said fan; a stator including a plurality of circumferentially-spaced stator segment assemblies each including a stator segment core defining a single stator pole and winding wire wound around said stator segment core; a rotor that is connected to said shaft and that defines a plurality of rotor poles, wherein said rotor tends to rotate relative to said stator to a rotational position that maximizes the inductance of an energized winding; and a drive circuit that energizes said winding wire around said stator segment assemblies based on said rotational position of said rotor using sensorless techniques.