基于无权重DMPTC优化策略的永磁同步电机调速系统

针对永磁同步电机(PMSM)模型预测转矩控制(MPTC)系统中存在的权重系数设计困难，以及稳态转矩、磁链脉动大的问题，提出了一种基于占空比优化的无权重模型预测转矩控制方法。首先建立PMSM无权重MPTC,每一控制周期内根据所定义的评估项计算交互误差，最小交互误差对应的电压矢量即为最优矢量，从而取消了权重系数设计。然后在无权重MPTC的基础上，引入占空比优化环节，所采用的占空比计算方法综合考虑了磁链和转矩因素，可有效抑制转矩、磁链脉动。仿真分析表明所提基于占空比优化的无权重模型预测转矩控制系统性能良好。

PMSM Speed Control System Based on Weightless DMPTC Optimization Strategy

Aiming at the difficulty in designing weight coefficients, and the problems of large steady-state torque and flux ripple in permanent magnet synchronous motor (PMSM) model predictive torque control (MPTC) systems, a weightless model predictive torque control method based on duty cycle optimization is proposed. Firstly, a PMSM weightless MPTC is established, and interaction errors are calculated based on the defined evaluation term within each control cycle. The voltage vector corresponding to the minimum interaction error is the optimal vector, thus eliminating the weight coefficient design. Then, on the basis of the weightless MPTC, a duty cycle optimization link is introduced. The proposed duty cycle calculation method used comprehensively considers the factors of flux and torque, which can effectively suppress torque and flux ripple. The simulation results show that the performance of the proposed weightless model predictive torque control system based on duty cycle optimization is good.