Model-Free Predictive Pulse Pattern Control for Permanent Magnet Synchronous Motor Drives

High-power permanent magnet synchronous motor (PMSM) drives require an efficient control strategy. Model predictive pulse pattern control (MP3C) is a promising solution in reducing total harmonic distortion (THD) when the machine operates at a high modulation index. Existing research on MP3C for PMSMs regulates phase currents indirectly by tracking the reference stator flux linkage from a machine model. However, the method would result in static current errors when the motor parameter mismatch exists. This article proposes a model-free predictive pulse pattern control (MFP3C) with current tracking capability to solve the problem. The new approach can offer the same THD level as the MP3C and eliminate the parameter dependence issue simultaneously. A comparative study on a simulated PMSM model is conducted to demonstrate the advantages of the proposed design.