Current loop dead-beat control with the digital PI-controller

This paper shows the possibility of dead-beat control for a current loop with a traditional PI-controller. Two different ways of PI-controller parameter calculations are presented. The modeling shows that dead-beat behavior of the current controller is possible if the predictive feedback is used and its calculation algorithm is presented. Algorithm includes winding circuit inductance estimation, correction of ADC feedback measurement to take into account preamplifier´s filter impact and ADC noise. All tests were performed on a DC-motor model but the results can be used for alternating current motors.