SERVO DRIVE Russian patent published in 2006 - IPC G05B11/01 

FIELD: mechanical engineering; drives of lifting mechanisms.

SUBSTANCE: invention relates to automatic control, namely, to drives of lifting mechanisms operating at considerable unbalance of load. Proposed servo drive contains series-connected sensor, control signal shaper, two parallel-connected circuits consisting of detector and controllable amplifier-limiter, power amplifier and actuator. Detector in parallel circuit are of different polarity. Output of actuator is coupled with input of sensor. Servo drive includes also torque whose input is connected with output of power amplifier, and output, with first control inputs of controllable amplifiers-limiters. It includes also series-connected differentiator, amplifier and scale divider whose output is connected to second control inputs of controllable amplifiers-limiters, and input of differentiator is connected with output of torque sensor.

EFFECT: improved accuracy of reproduction of control actions by drive.

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