摘要
在动车、高铁、地铁等牵引控制系统中,为了解决传统速度传感器在永磁同步电机上操控精度低、稳定性差的问题。利用电机自身参数,构建状态观测器组成无速度传感器系统。通过测量定子电压获得电机的转速和转子位置信息,可以有效预估转动速度并且能较好地追踪实际转动速度,采用改进的滑模观测器解决牵引系统中平稳过渡和抖振问题,改善系统的动态和静态性能。仿真结果表明,改进的滑模观测器能够在突加扰动时,可以准确跟踪电动机的实际转速,提高了系统的鲁棒性。
In the traction control system of motor car,high-speed railway and subway,in order to solve the problem of low control precision and poor stability of traditional speed sensor in PMSM.Using the parameters of the motor itself,the State observer is constructed to form a speed sensorless system.By measuring the stator voltage to obtain the rotor speed and position information of the motor,the rotational speed can be effectively estimated and the actual rotational speed can be well tracked,the improved sliding film observer is used to solve the smooth transition and buffeting problem in the traction system,and to improve the dynamic and static performance of the system.The simulation results show that the improved sliding-film observer can accurately track the actual speed of the motor and improve the robustness of the system.
作者
何世君
He Shijun(School of Electrical Engineering,Heilongjiang University of Sc ience and Technology,Harbin Heilongjiang,150022)
出处
《电子测试》
2021年第11期53-54,95,共3页
Electronic Test
