计及开关频率优化的永磁同步电机模型预测转矩控制  

Model Predictive Torque Control for Permanent Magnet Synchronous Motor with Switching Frequency Optimization

作　　者：田朱杰 吴晓新[1] 於锋[1] 刘兴 TIAN Zhujie;WU Xiaoxin;YU Feng;LIU Xing(School of Electrical Engineering,Nantong University,Nantong 226019,China)

机构地区：[1]南通大学电气工程学院,江苏南通226019

出　　处：《电机与控制应用》2018年第11期21-27,共7页Electric machines & control application

基　　金：国家自然科学基金项目(51807098);南通市科技应用研究计划项目(GY12016008)

摘　　要：为减小逆变器开关频率对永磁同步电机(PMSM)性能的影响,提出了一种计及开关频率优化的PMSM模型预测转矩控制(MPTC)方法。建立了电磁转矩及定子磁链数学模型,并在此基础上设计了MPTC全速域价值函数。在全速域价值函数中加入了逆变器开关频率的限制条件,以实现恒转矩区内最大转矩电流比、恒功率区内弱磁调速并计及开关频率最优化的控制效果。仿真结果证明了所提方案不仅具有较高的动态响应性能,而且有效降低了逆变器的开关频率。In order to reduce the influence of inverter switching frequency on the output performance of permanent magnet synchronous motor(PMSM),a model predictive torque control(MPTC)method considering the switching frequency optimization for PMSM was proposed.According to the mathematical model of the electromagnetic torque and stator flux,a cost function based on the MPTC was designed.In order to implement the low switching frequency in the full speed range,a switching frequency restriction was also constructed.The control algorithm was developed in both the constant-torque operation and constant-power operation conditions,when the maximum torque per ampere and flux weakening control methods were employed,respectively.Simulation results were presented,verifying the effectiveness of the proposed control strategy.

关 键 词：永磁同步电机 模型预测转矩控制 开关频率 最大转矩电流比 弱磁控制 

分 类 号：TM351[电气工程—电机]