Sensorless and brushless DC motor

Details Sensorless and brushless DC motor Sensorless and brushless DC motor

2007-12-04

2007-12-04

Ip, Paul (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S434000, C318S747000, C318S132000, C310S06800R

Reexamination Certificate

active

11306259

ABSTRACT:
A sensorless and brushless motor is disclosed including a stator, a rotor, a control circuit and an induction coil (50). The stator includes a stator core (30) and a stator coil (34) wound around the stator core. The rotor includes a rotor magnet (40). The control circuit is electrically connected with the stator coil for controlling a current energizing the stator coil. The induction coil is mounted to the stator and electrically connected with the control circuit. When the rotor rotates, the induction coil is capable of outputting a signal to the control circuit and in response to the signal, the control circuit is capable of changing a direction of the current flowing in the stator coil. Thus, the commutation control for the stator coil is performed by the induction coil and the conventional Hall sensor is eliminated.

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