Design of Direct Torque Optimal Controller of Interior Permanent Magnet Synchronous Motor Based on Model Prediction Control

摘要

For the characteristics of the high salient rate of interior permanent magnet synchronous motor, a direct control method based on model prediction is designed. It is established that the discretization prediction model of permanent magnet synchronous motor with the vector model of inverter voltage in dq coordinate, and the evaluation functions are constructed of electromagnetic torque ripple and optimal operating state of the motor. That the every possible voltage vector of inverter in current state are chosen through the evaluation functions and hysteresis comparators are removed. Then the comprehensive optimal control of multi-objective optimization is realized. The simulation results show that the method can achieve multitarget optimum control, inhibition of inverter voltage saturation phenomenon, and has a good performance of speed adjustment.