基于改进双矢量的永磁同步电机模型预测转矩控制的研究  

Research on the Improved Two-vector-based Model Predictive Torque Control of PMSM

作　　者：沙印[1] 陈虎威 SHA Yin;CHEN Hu-wei(Locomotive Hub Motor Intelligent Drive Engineering Center,Jiangyin Polytechnic College,Jiangyin 214400,China)

机构地区：[1]江阴职业技术学院机车轮毂电机智能驱动工程技术中心,江苏江阴214400

出　　处：《长春师范大学学报》2023年第4期25-37,共13页Journal of Changchun Normal University

基　　金：江阴职业技术学院科研项目“智能电网下动态安全充电策略的关键技术研究”(XJ2022LG010)。

摘　　要：永磁同步电机的占空比模型在预测转矩控制时仅使用零矢量作为控制转矩的第二矢量,进而导致电机的转矩控制性能变差。为此,通过合理选择活动矢量,提出了一种改进的双矢量预测转矩控制策略。首先,构建了占空比模型(Duty-MPTC),通过分析永磁同步电机的转矩和磁通量规律,获得转矩和磁通差参数;其次,建立第二矢量选择表,确定用于转矩波动抑制的最优矢量组合;最后,在6 kW永磁同步电机上对所提出的策略进行了实验验证,并与占空比模型进行了模拟对比。实验结果表明,本文提出的方法可以显着降低转矩波动,提高动态性能,降低平均切换频率。The duty cycle model of the permanent magnet synchronous motor(PMSM)only uses the zero vector as the second vector of the control torque when predicting the torque control,which leads to the deterioration of the torque control performance of the motor.For this reason,an improved two-vector predictive torque control strategy is proposed through reasonable selection of active vectors.Firstly,a duty cycle model(Duty-MPTC)is constructed,while the torque and magnetic flux difference parameters are obtained by analyzing the torque and magnetic flux laws of PMSM.Secondly,a second vector selection table is established to determine the optimal vector combination for the torque ripple suppression.Finally,the proposed strategy is verified experimentally on a 6 kW PMSM,and compared with the duty cycle model(Duty-MPTC).The experimental results show that the method proposed in this paper can significantly reduce torque ripple,improve dynamic performance,and reduce average switching frequency.

关 键 词：模型预测转矩控制 永磁同步电机 转矩波动抑制 占空比 双矢量 

分 类 号：TM351[电气工程—电机]