Method and apparatus for torque ripple compensation

Details Method and apparatus for torque ripple compensation Method and apparatus for torque ripple compensation

1993-11-04

1995-08-22

Shoop, Jr., William M.

Electricity: motive power systems

Constant motor current, load and/or torque control

318439, 318431, 318434, H02P 700

Patent

active

054443415

ABSTRACT:
Torque ripple in brushless DC motors is reduced by compensation of signals controlling energization of motor stator windings. Motor current magnitude is compensated in response to compensation factor values correlated to the ratio of actual torque to ideal torque at constant current at various relative positions of a motor rotor and stator. A motor current command component associated with a commanded torque is compensated for cogging torque associated with motor magnetization. Measured relative position values are compensated to account for torque profile distortions associated with motor current magnitude.

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Franklin, Powell, and Workman, "Digital Control of Dynamic Systems", pp. 572.varies.581, 1990 Addison-Wesley publication.

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