一种感应电机转子时间常数MRAS的在线辨识方法  

Rotor Time Constant On-Line Estimation of Induction Motors Based on MRAS

作　　者：王高林[1] 杨荣峰[1] 张家皖[1] 于泳[1] 马建雄 蔡亮 徐殿国[1] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院哈尔滨150001 [2]上海新时达电气股份有限公司上海201802

出　　处：《电工技术学报》2012年第4期48-53,共6页Transactions of China Electrotechnical Society

基　　金：中国博士后科学基金特别资助项目(201003427);中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.2009043)

摘　　要：针对转子时间常数变化可能会导致感应电机磁场定向控制发生失调的问题,研究一种基于无功功率的模型参考自适应(MRAS)转子时间常数在线辨识方法。通过Popov超稳定性理论对辨识系统的稳定性进行分析,为了提高模型计算的准确性,采用一种在同步旋转坐标系中检测电流矢量角的死区效应补偿策略,以克服三相逆变器死区效应导致的相电压重构误差以及电流波形畸变的负面影响,并分析所研究的MRAS转子时间常数辨识方法对所涉及电机参数的敏感性。通过11 kW感应电机矢量控制系统进行实验,结果验证了辨识方法的有效性。Field-oriented controlled induction motor drives may be detuned due to rotor time constant variation.A rotor time constant estimation method based on model reference adaptive system（MRAS） with reactive power model is presented.Convergence of the estimator is proved using the Popov＇s super-stability theory.Since dead-time effect of inverter may induce reconstruction error of phase voltage and waveform distortion of stator current.A dead-time compensation strategy is presented to improve accuracy of model calculation.The stator current vector angle is obtained in synchronous rotating scheme.Then sensitivity of motor parameters to the model is analyzed.The feasibility of the proposed estimation is verified by experimental results of field-oriented vector controlled 11kW induction motor drive.

关 键 词：感应电机 转子时间常数辨识 MRAS 死区效应补偿 参数变化敏感性 

分 类 号：TM346[电气工程—电机]