论文部分内容阅读
针对三相四开关容错逆变器(TPFSI)的永磁同步电机(PMSM)驱动系统,基于模型参考自适应(MRAS)观测器,提出了一种模型预测电流控制(MPCC)策略.考虑温度变化对定子电阻的影响,基于MRAS技术对MPCC算法中所需的定子电阻进行了在线辨识;为了降低逆变器的平均开关频率,采用了开关频率可优化的MPCC系统目标函数.仿真结果表明,所提出的设计方法可以使三相四开关逆变器驱动的PMSM系统稳定运行,能够有效地降低逆变器的平均开关频率,对定子电阻变化具有强的鲁棒性,从而达到满意的转矩和转速控制效果.“,”Based on a three-phase four-switch inverter,we propose a model of predictive current control (MPCC) strategy for permanent magnet synchronous motor (PMSM) drive systems with a model reference adaptive system (MRAS) observer.Because stator resistance varies with temperature change,we design an MRAS observer to identify stator resistance online.In order to reduce the average switching frequency of the inverter,switch frequency optimization is taken into account in the design of the MPCC cost function.Numerical simulation results illustrate that the proposed MPCC enables the whole system to run stably,decreases the average switching frequency of the inverter,shows strong robustness with respect to stator resistance,and consequently achieves satisfactory torque and speed control.