High Frequency Signal Injection Sensorless Control of Finite-control-set Model Predictive Control with Deadbeat Solution

Due to lack of the pulse-width-modulation (PWM) module, it is difficult to implement conventional high frequency signal injection (HFSI) sensorless control method on finite-control-set model predictive control (FCS-MPC). Hence, this paper proposes a simple method by using the deadbeat solution, in which the current tracking error in the cost function is transformed to the voltage reference tracking error. Correspondingly, a HF voltage reference is added to the cost function and the injection can be achieved without modifications of existing HFSI methods. The effectiveness of the proposed method is verified by experiments with a conventional pulsating signal injection method.