dynamic response improvement to load disturbance of model-free predictive controlled pmsms by integral sliding mode controller

Model-free predictive control of permanent magnet synchronous motors does not require a mathematical model of the motor under control. therefore, the control algorithm can be implemented without a knowledge of the motor parameters. however, the dynamic response of the drive under this control method is not immune to load disturbances, and still is dependent to the load parameters. in this paper, an integral sliding mode controller is proposed for speed control loop to improve the disturbance-rejection performance of the speed controller. therefore, the proposed control method is not only immune to motor parameter variations but also to the external disturbances. the proposed and the conventional model-free control methods are implemented in matlab/simulink and compered to each other. the simulation study demonstrates that the proposed method not only achieves good dynamic response under abrupt load changes, but also is robust to motor parameter variations.