Sensorless Model Predictive Current Control of PMSM Based on Novel Phase-Locked Loop

This paper proposes a novel cost function-based phase-locked loop method (MPCC-PLL-CF) tailored for model predictive current control (MPCC) of permanent magnet synchronous machines (PMSMs). The approach employs a two-stage angular compensation search strategy combined with a d-axis back electromotive force (EMF) identification algorithm to achieve accurate estimation of rotor position and speed. The proposed strategy not only further reduces the estimation errors of electrical angle and rotational speed but also maintains a parameter-free structure. Comprehensive simulation results demonstrate the method’s effectiveness and superior performance.