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State-space control of the drive with PMSM and flexible coupling

Vittek J., Makyš P., Pospíšil M., Szychta E., Luft M.

Logistyka

2010

nr 6

A control system, which achieves prescribed speed and position responses, for electric drives with a significant torsion vibration mode is presented. Control system design exploits state-space control and forced dynamics control principles. Derived control algorithm respects the vector control condition by keeping the direct axis current component approximately zero as well as controlling the load position with prescribed closed loop dynamics. Set of two observers, one on load side and the second one on motor side, generate all state variables necessary for control algorithm design including torques acting on the motor and load side to satisfy all conditions for achieving prescribed dynamics. This approach allowed to eliminate position sensor on motor side. The simulations confirm that proposed model based position control system can operate with moderate accuracy.