Method and circuit for clamping the recirculation current in sta

Details Method and circuit for clamping the recirculation current in sta Method and circuit for clamping the recirculation current in sta

1994-05-27

1996-11-05

Ip, Paul

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02P 700

Patent

active

055720960

ABSTRACT:
A circuit for clamping the voltage spike of a stator coil winding of a brushless direct current motor is disclosed. The circuit uses a comparator to monitor the voltage on a stator winding. When a voltage spike is detected, the comparator turns on the stator winding driver transistor to clamp the voltage spike. The comparator can be designed to trigger at a desired threshold voltage so that the threshold can optimized. Additionally, the comparator can be selectively disabled to trigger when voltage spikes are anticipated.

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