Brushless motor utilizing FET drivers

Details Brushless motor utilizing FET drivers Brushless motor utilizing FET drivers

1993-02-17

1994-06-07

Wysocki, Jonathan

Electricity: motive power systems

Switched reluctance motor commutation control

318439, H02P 700

Patent

active

053192915

ABSTRACT:
A programmable logic device for commutating a brushless motor having an encoder with a plurality of Hall-effect sensors operative for providing commutation information to a motor controller for commutation of the motor by sequencing of a plurality of complementary FET's for energizing stator windings of the brushless motor comprises a Hall-effect sensor decode circuit and a deadtime generator. The sensor decode circuit is operative for commutation of motor output control signals in accordance with direction and PWM signals from a system controller and commutation information from the Hall-effect sensors. The deadtime generator provides timed blanking for ensuring that each respective one of said plurality of FET's is turned completely off before its complementary FET is turned on to protect against destructive currents.

REFERENCES:
patent: 4030005 (1977-06-01), Doemen
patent: 4379984 (1983-04-01), Muller
patent: 4544868 (1985-10-01), Murty
patent: 4633151 (1986-12-01), Crook
patent: 4748388 (1988-05-01), Muller
patent: 4782272 (1988-11-01), Buckley et al.
patent: 4870332 (1989-09-01), Coghran et al.
patent: 4988905 (1991-01-01), Tolmie, Jr.
patent: 5079487 (1992-01-01), Malang

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