基于双信号注入并考虑电压源逆变器非线性的直流偏置混合励磁游标电机MTPA控制

This paper proposes a DC-Biased hybrid excitation vernier motor maximum torque per ampere (MTPA) control strategy based on double signal injection considering voltage source inverter (VSI) nonlinearity. First, the mathematical model of the motor considering voltage source inverter nonlinearity is derived in the rotating coordinate system. Then, the effect of neglecting higher order derivatives of MTPA criterion is reduced by using double virtual square wave signal injection. Also, the effect of voltage source inverter nonlinearity is considered in the MTPA control of this strategy. Therefore, the proposed control strategy obtains more accurate MTPA points than that of the traditional virtual square wave signal injection. Furthermore, an iterative algorithm is used to preprocess the current vector angle to improve the dynamic response. Finally, the superiority of the control strategy is verified by simulation and experiments.