在电动汽车用永磁同步电机驱动系统中,常采用主动短路(active short circuit,ASC)的方法避免高速行驶条件下电机反电动势过高造成的动力电池损坏。该方法存在交流侧暂态电流峰值较大,易造成功率器件过流损坏的缺点。考虑线性变调制比型...在电动汽车用永磁同步电机驱动系统中,常采用主动短路(active short circuit,ASC)的方法避免高速行驶条件下电机反电动势过高造成的动力电池损坏。该方法存在交流侧暂态电流峰值较大,易造成功率器件过流损坏的缺点。考虑线性变调制比型主动短路(linear variable modulation ratio active short circuit,LVM-ASC)能有效降低暂态电流峰值而尚无机理模型提出。该文对ASC方法下的电机最大峰值电流进行定量分析,通过分段线性化建立系统在LVM-ASC方法下的离散化电流模型,并给出一种变调制比时间参数的设计方法,提升主动短路保护策略的灵活性。最后通过仿真和实验验证模型和参数设计方法的有效性。展开更多
A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,whic...A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,which not only decreases the band width of sliding mode and strengthens the system robustness,but also improves the dynamic performance and stability capability of the system.Moreover,a discrete-time sliding mode control strategy based on Kalman filter method was designed,and Kalman filter was employed to eliminate the influence of system noise.Simulation results show that there is no chattering phenomenon in the output of controller and the state variables of controlled system,and the proposed algorithm is also feasible and has strong robustness to external disturbances.展开更多
文摘在电动汽车用永磁同步电机驱动系统中,常采用主动短路(active short circuit,ASC)的方法避免高速行驶条件下电机反电动势过高造成的动力电池损坏。该方法存在交流侧暂态电流峰值较大,易造成功率器件过流损坏的缺点。考虑线性变调制比型主动短路(linear variable modulation ratio active short circuit,LVM-ASC)能有效降低暂态电流峰值而尚无机理模型提出。该文对ASC方法下的电机最大峰值电流进行定量分析,通过分段线性化建立系统在LVM-ASC方法下的离散化电流模型,并给出一种变调制比时间参数的设计方法,提升主动短路保护策略的灵活性。最后通过仿真和实验验证模型和参数设计方法的有效性。
基金Project(50721063) supported by the National Natural Science Foundation of China
文摘A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,which not only decreases the band width of sliding mode and strengthens the system robustness,but also improves the dynamic performance and stability capability of the system.Moreover,a discrete-time sliding mode control strategy based on Kalman filter method was designed,and Kalman filter was employed to eliminate the influence of system noise.Simulation results show that there is no chattering phenomenon in the output of controller and the state variables of controlled system,and the proposed algorithm is also feasible and has strong robustness to external disturbances.
