Optimization of Dual Inverter’s DC Voltages for Predictive Control of Permanent Magnet Synchronous Motor Drive

This paper presents a proposition for a configuration designed for an open-winding permanent magnet synchronous motor featuring two distinct DC link voltages. The optimization focuses on the ratio between these two unequal DC link voltages. A two-level voltage source inverter supplies each side of the open-winding permanent magnet motor. By leveraging isolated DC voltages, a maximum of 49 different voltage vectors can be applied to govern the motor operation. A model predictive control approach is utilized to ascertain the most suitable voltage vector for the given switching period. The method aims to enhance performance by minimizing harmonic distortion through optimizing voltage ratio. Simulation outcomes demonstrate that the refined ratio of DC link voltages reduces the total harmonic distortion factor of stator current compared to alternative ratios.