Apparatus and method for detection and control of circulating cu

Details Apparatus and method for detection and control of circulating cu Apparatus and method for detection and control of circulating cu

1994-03-28

1996-09-03

Ip, Paul

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318801, 318268, 622284, 62215, H02P 540

Patent

active

055526853

ABSTRACT:
A current regulation circuit for a motor. The motor includes a stationary assembly having windings adapted for energization in at least one preselected sequence and a rotatable assembly in magnetic coupling relation to the stationary assembly. A power supply link connects the windings to a power supply and includes power switching devices for selectively energizing the windings in the preselected sequence by selectively connecting the power supply link to the windings to produce an electromagnetic field for rotating the rotatable assembly. The power switching devices each have a conducting state and a nonconducting state. The current regulation circuit includes a timing circuit, a current sensing circuit and a control circuit. The timing circuit defines preset periods during which each of the power switching devices may be nonconducting. The current sensing circuit senses current in the power supply link. The control circuit controls the power switching devices so that each of the power switching devices is nonconducting when the sensed current exceeds a peak current reference level during the preset periods. In this manner, the current regulation circuit controls current which circulates during periods when only one power switching device is conducting.

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Soviet Patent Abstracts, S-X sections, week 8945, Dec. 20, 1989.

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