摘要
在分析无速度传感器自适应观测器原理的基础上,指出了常规自适应观测器构造中存在的问题,对低速发电工况下不稳定问题进行了分析,提出了一种改进的自适应观测器,结合三电平逆变器直接转矩控制系统进行仿真研究。仿真结果表明,所提出的自适应观测器在全速范围内具有良好的稳态和动态性能,改善了低速发电状态下的稳定性。
On the basis of analyzing adaptive observer principle of speed sensor-less control system,the problem about constituting the adaptive observer was proposed,and instability problem in low-speed regenerating mode was analyzed.A newly-improved adaptive observer was proposed and simulation research was made with three-level inverter direct torque control.Simulation results show that the improved adaptive observer has good steady and dynamic performances,and stabilization of regenerating-mode operation in low speed is improved.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第24期7891-7895,共5页
Journal of System Simulation
