A global fast terminal sliding mode(GFTSM)-based model predictive torque control(MPTC)strategy is developed for permanent magnet synchronous motor(PMSM)drive system with only one phase current sensor.Generally two pha...A global fast terminal sliding mode(GFTSM)-based model predictive torque control(MPTC)strategy is developed for permanent magnet synchronous motor(PMSM)drive system with only one phase current sensor.Generally two phase-current sensors are indispensable for MPTC.In response to only one phase current sensor available and the change of stator resistance,a novel adaptive observer for estimating the remaining two phase currents and time-varying stator resistance is proposed to perform MPTC.Moreover,in view of the variation of system parameters and external disturbance,a new GFTSM-based speed regulator is synthesized to enhance the drive system robustness.In this paper,the GFTSM,based on sliding mode theory,employs the fast terminal sliding mode in both the reaching stage and the sliding stage.The resultant GFTSM-based MPTC PMSM drive system with single phase current sensor has excellent dynamical performance which is very close to the GFTSM-based MPTC PMSM drive system with two-phase current sensors.On the other hand,compared with proportional-integral(PI)-based and sliding mode(SM)-based MPTC PMSM drive systems,it possesses better dynamical response and stronger robustness as well as smaller total harmonic distortion(THD)index of three-phase stator currents in the presence of variation of load torque.The simulation results validate the feasibility and effectiveness of the proposed scheme.展开更多
多相永磁同步电机驱动系统在低压大功率、高可靠性的应用场合日受青睐和瞩目。首先研究了适用于五相永磁同步电机系统的传统有限集模型预测转矩控制(finite-control-set model predictive torque control,FCS-MPTC)算法,为了消除d3-q3...多相永磁同步电机驱动系统在低压大功率、高可靠性的应用场合日受青睐和瞩目。首先研究了适用于五相永磁同步电机系统的传统有限集模型预测转矩控制(finite-control-set model predictive torque control,FCS-MPTC)算法,为了消除d3-q3谐波子空间的低次电流谐波,构造了包含谐波项的目标函数。然后,为了减小FCS-MPTC算法实现时带来的巨大计算量,提出了一种基于转矩与磁链无差拍估算的每个控制周期内电压矢量控制集优化方法。所提算法不仅保持了传统FCS-MPTC算法优越的稳态性能、快速的动态响应和低次电流谐波抑制能力,同时显著减少了数字实现的运算量。最后,将所提算法分别与两种传统FCS-MPTC算法进行半实物实验对比分析,验证了所提算法的正确性和有效性。展开更多
基金supported by the National Natural Science Foundation of China(61463025).
文摘A global fast terminal sliding mode(GFTSM)-based model predictive torque control(MPTC)strategy is developed for permanent magnet synchronous motor(PMSM)drive system with only one phase current sensor.Generally two phase-current sensors are indispensable for MPTC.In response to only one phase current sensor available and the change of stator resistance,a novel adaptive observer for estimating the remaining two phase currents and time-varying stator resistance is proposed to perform MPTC.Moreover,in view of the variation of system parameters and external disturbance,a new GFTSM-based speed regulator is synthesized to enhance the drive system robustness.In this paper,the GFTSM,based on sliding mode theory,employs the fast terminal sliding mode in both the reaching stage and the sliding stage.The resultant GFTSM-based MPTC PMSM drive system with single phase current sensor has excellent dynamical performance which is very close to the GFTSM-based MPTC PMSM drive system with two-phase current sensors.On the other hand,compared with proportional-integral(PI)-based and sliding mode(SM)-based MPTC PMSM drive systems,it possesses better dynamical response and stronger robustness as well as smaller total harmonic distortion(THD)index of three-phase stator currents in the presence of variation of load torque.The simulation results validate the feasibility and effectiveness of the proposed scheme.
文摘多相永磁同步电机驱动系统在低压大功率、高可靠性的应用场合日受青睐和瞩目。首先研究了适用于五相永磁同步电机系统的传统有限集模型预测转矩控制(finite-control-set model predictive torque control,FCS-MPTC)算法,为了消除d3-q3谐波子空间的低次电流谐波,构造了包含谐波项的目标函数。然后,为了减小FCS-MPTC算法实现时带来的巨大计算量,提出了一种基于转矩与磁链无差拍估算的每个控制周期内电压矢量控制集优化方法。所提算法不仅保持了传统FCS-MPTC算法优越的稳态性能、快速的动态响应和低次电流谐波抑制能力,同时显著减少了数字实现的运算量。最后,将所提算法分别与两种传统FCS-MPTC算法进行半实物实验对比分析,验证了所提算法的正确性和有效性。
