Fet motor drive system

Details Fet motor drive system Fet motor drive system

H - Electricity

02

P

318/93

H02P 6/00 (2006.01)

Patent

CA 1175895

RD-12,226 FET MOTOR DRIVE SYSTEM Abstract of the Disclosure A multipole permanent magnet rotor is positioned on a shaft and rotatably mounted in a multiphase stator having two windings per stator phase. A distributor comprising a pattern of conducting and non-conducting material is mounted to turn with the rotor shaft. Pickup "fingers" in contact with the distributor, gate appropriate FET's of the pairs of FET's associated with each stator phase in sequence, with timing dependent on the instantaneous shaft position, to generate a rotating flux field. A voltage across the windings provides the current for flux generation, and can be supplied by a full wave rectified single phase AC source. The speed of rotation of the motor can be controlled by varying the voltage supplied.

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