永磁同步电机改进型三矢量模型预测转矩控制

Improved Three-Vector Model Predictive Torque Control of Permanent Magnet Synchronous Motor

永磁同步电机的占空比模型预测转矩控制是指在一个控制周期内通过一个有效矢量和一个零矢量控制转矩。传统占空比控制策略通常只关注转矩性能的改善而忽略了磁链波动的抑制,将会使得电机的磁链波动较大,进而导致电机的电流性能和其他相关性能变差。为此,该文提出一种抑制磁链波动的改进型三矢量模型转矩预测控制策略,通过建立有效矢量选择表,在经典的占空比模型预测转矩控制基础上灵活添加一个额外的有效矢量,以较少的计算量得到各个矢量的占空比,以期优化永磁同步电机系统的磁链和转矩的控制性能。在一台6kW永磁同步电机上对该文所提策略进行实验验证,结果证明了该策略的可行性和有效性。

Duty cycle model predicted torque control uses a active vector and a zero vector in a control period to control the permanent magnet synchronous motor.The traditional duty cycle control strategies only focuses on the improvement of torque performance and ignores the suppression of flux ripple reduction,which will causes the flux of the motor to fluctuate greatly and will result in deterioration of the motor's current performance and torque performance.Therefore,this paper proposes an improved three-vector model torque predictive control strategy that suppresses flux fluctuations.By establishing an effective vector selection table,it can flexibly add an additional active vector based on the classical duty cycle model predictive torque control and the duty cycle of each vector is obtained with a small amount of calculation,this paper aim to optimize the control performance of the flux and the torque of the permanent magnet synchronous motor system.The feasibility and effectiveness of proposed strategy are verified by the experimental results on a 6kW PMSM.