Comparison and analysis of the DTVV-MPC strategy and FOC strategy for the PMSM considering the inverter dead time

Permanent magnet synchronous motors (PMSMs) have been widely utilized due to their exceptional operating efficiency and high torque output ratio. However, in practical applications, the nonlinear factors of the inverter and the motor design cause current harmonics, which can cause torque ripples and restrict the application of PMSMs on many high-precision occasions. In this paper, combining dead-time voltage vector model predictive control (DTVV-MPC) and field-oriented control (FOC), the influence of inverter switching frequency and dead zone effect on current THD is analyzed, and introduces the implementation method of DTVV-MPC. The current total harmonic distortion (THD) of traditional FOC and DTVV-MPC is compared through simulation. Experimental research on the effects of dead zone time and switching frequency on FOC’s current THD is conducted. The simulation results indicate that, with the same number of switchings, DTVV-MPC exhibits stronger robustness to dead time in terms of current THD compared to FOC.