基于参考磁链空间电压矢量调制策略的PMSM DTC系统

Direct Torque Control System of Permanent Magnet Synchronous Motor Based on the Strategy of Reference Stator Flux Linkage and Voltage Space Vector Modulation

设计了基于参考磁链空间电压矢量调制策略的永磁同步电机直接转矩控制方案,用参考磁链控制器和空间电压矢量调制模块取代了常规直接转矩控制系统中的开关表和滞环控制器。仿真表明,与常规直接转矩控制相比较,基于参考磁链空间电压矢量调制策略的永磁同步电机直接转矩控制系统无常规DTC系统启动时的负向转矩问题,转矩和转速波动显著减少,运行更加平稳,具有更好的动、静态性能。

A novel direct torque control system based on the strategy of reference stator flux linkage and space vector modulation for permanent magnet synchronous motor was proposed. Reference stator flux linkage controller and space vector modulation module were used in the strategy instead of switching table and hysteresis controller in conventional direct torque control. The simulation results show that the novel control system doesn＇t have the bug of minus direction torque of conventional direct torque control when the motor in the start stage. The ripples of torque and speed are dramatically reduced and the running performance is more stable. The dynamic and static performance of the control system is improved greatly.