Motor driving circuit for a three-phase brushless motor

Details Motor driving circuit for a three-phase brushless motor Motor driving circuit for a three-phase brushless motor

1996-10-11

1999-02-23

Ip, Paul

Electricity: motive power systems

Limitation of motor load, current, torque or force

318138, 318254, 318370, 360 741, 360 90, H02P 762

Patent

active

058748172

ABSTRACT:
A switching signal generator outputs a switching signal which indicates either an accelerating mode or a decelerating mode by comparing a motor control signal and reference voltage. A first activation signal generator and a second activation signal generator output a first activation signal and a second activation signal, respectively, according to the switching signal from the switching signal generator. A switching control signal generator outputs either a switching control signal based on a motor location signal or a desired electric potential according to the switching signal from switching signal generator, a first activation signal from the first activation signal generator and a motor location signal. When a power-supply side controller and an earth side controller are in a decelerating mode, power-supply side first, second, and third output transistors are non-conductive and first second and third earth side output transistors are conductive by supplying a base current based on a predetermined electric potential from the switching control signal generator.

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patent: 5426355 (1995-06-01), Zweighaft
patent: 5602452 (1997-02-01), Underhill
patent: 5717298 (1998-02-01), Tang et al.

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