摘要
针对在直接转矩控制系统中参数变化引起的电机特性不稳定问题,提出了一种基于模型参考自适应的定子磁链和转速的辨识方法,并将其应用在无速度传感器的直接转矩控制系统中.仿真结果表明:该方法有效地减小了定子电阻变化对系统特性的影响,并将由于转子常数变化引起的转速辨识误差限制在很小的范围内,从而提高了系统稳定性.
Due to the variation of motor parameters with time in a DTC system, a method for identifying stator flux and rotor speed based on MRAC is proposed and is introduced into a sensorless DTC system. The results of simulation show that this method can effectively reduce the influence of variation of stator resistance on motor performance and limit to a very small range the identification error of rotor speed, which is caused by the variation of rotor parameters, thus improving greatly the stability of the system.
出处
《甘肃科学学报》
2006年第1期103-106,共4页
Journal of Gansu Sciences
基金
铁道部专项基金资助项目(JZ0002076)
甘肃省自然科学基金项目(ZS031-B25-009-G)
关键词
直接转矩控制
模型参考自适应辨识
定子磁链辨识
转速辨识
direct torque control(DTC)
model reference adaptive identification (MRAI)
stator flux identification
rotor speed identification