基于ESO的PMSM驱动系统单相电流传感器模型预测转矩控制

ESO-BASED MODEL PREDICTIVE TORQUE CONTROL FOR PMSM DRIVE SYSTEM WITH SINGLE PHASE CURRENT SENSOR

针对仅有一相电流传感器的三相永磁同步电机(PMSM)系统,采用扩张状态观测器(ESO)技术构造观测器,以实现对其他两相电流和时变定子电阻的快速准确估计;为增强系统鲁棒性,设计改进滑模(SM)转速调节器;为减小转矩和磁链脉动,给出系统有限集-模型预测转矩(FS-MPTC)设计方法。所设计基于ESO的SM-MPTC策略能够使仅有一相电流传感器的PMSM系统可靠稳定运行,具有满意的动态性能和较强的鲁棒性。仿真结果验证了所提方法的正确性和可行性。

For three phase permanent magnet synchronous motor(PMSM)drive system with single phase current sensor,based on extended state observer(ESO),a new current sensorless technique is put forward in order to estimate both the remaining two phase currents and time-varying stator resistance.To enhance the system robustness,an improved sliding mode(SM)-based speed regulator is proposed,which is chattering-free.Moreover,to reduce torque and flux ripples,finite set-model predictive torque control(FS-MPTC)is designed.The resultant ESO-based SM-MPTC strategy enables PMSM drive system with single phase current sensor to possess satisfactory dynamical performance and strong robustness.The simulation results validate the feasibility and effectiveness of the proposed scheme.