Feedback circuit for eliminating DC offset in drive current of a

Details Feedback circuit for eliminating DC offset in drive current of a Feedback circuit for eliminating DC offset in drive current of a

1990-08-15

1991-10-01

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318254, 318138, 318811, H02P 1100, H02P 602

Patent

active

050536885

ABSTRACT:
A motor control (10) for a motor (12) powered by an AC pulse source which applies current pulses to stator windings of the motor to cause rotation of the motor in accordance with the invention includes a current sensor (18) for sensing a DC net current in the current pulses flowing to the stator windings; a pulse width modulator (26-58) for pulse width modulating the current pulses; and wherein the width of the pulses is modulated in response to the sensed net current to reduce the net current towards zero.

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"A New Technology in Energy-Efficient Electrically Driven Aircraft Environmental Control Systems", authored by William W. Cloud, James E. McNamara and David B. Wigmore, appearing as Article No. 869390 of the American Chemical Society, pp. 1696-1702, which also was presented at the IECEC Conference, Aug. 25-26, 1986.

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