MICROMASTER 4: Closed-loop torque control and load distribution
In addition to a wide range of applications where drives are used to control the speed (variable-speed drives), there are also numerous cases where it is necessary to control the drive torque.
Typical applications for closed-loop torque controls are Axial winder:
Axial winders are used to wind and unwind material webs, cables, wires etc. Constant speed is not decisive – but instead constant tension over the complete winding range. The tension is controlled using a dancer roll, with tension measuring transducer or indirectly using the motor torque
The example discusses the possibility of implementing closed-loop torque control with encoder and without encoder (sensorless operation). Further, circuit versions and load equalization control for single and group drives are also discussed.
Figure 1: Closed-loop torque control with an encoder
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Closed-loop torque control and load distribution
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