Control of slew rate during turn-on of motor driver transistors

Details Control of slew rate during turn-on of motor driver transistors Control of slew rate during turn-on of motor driver transistors

1997-04-17

1999-07-06

Masih, Karen

Electricity: motive power systems

Limitation of motor load, current, torque or force

318254, 318138, A01R 3946

Patent

active

059201665

ABSTRACT:
A circuit for controlling the slew rate at a motor coil during turn-on in a commutation sequence is disclosed. The disclosed circuit includes a switched current mirror that receives the commutation signal, and that provides a mirrored current to the input of an integrating buffer amplifier when its associated coil is to be driven. The integrating buffer amplifier includes an amplifier with a feedback capacitor, and a current source connected at its input, for reducing the voltage slew rate during turn-off of the transistor. The mirrored current applied to the input on the integrating buffer amplifier is greater than that of the current source, but limited so as to reduce the voltage slew at the coil.

REFERENCES:
patent: 4274014 (1981-06-01), Schade, Jr.
patent: 4349771 (1982-09-01), Buxton
patent: 4429270 (1984-01-01), Davies et al.
patent: 4527102 (1985-07-01), Gotou
patent: 5191269 (1993-03-01), Carbolante
patent: 5477489 (1995-12-01), Wiedmann

Affiliated with

Also associated with

Rating

Control of slew rate during turn-on of motor driver transistors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control of slew rate during turn-on of motor driver transistors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control of slew rate during turn-on of motor driver transistors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-901879