考虑死区时间的直线感应电机参数静止自整定方法  

Parameter static self-tuning method of linear induction motor considering dead-time

作　　者：吕刚[1] 杨琛 罗志昆 LYU Gang;YANG Chen;LUO Zhikun(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《北京交通大学学报》2020年第1期91-97,105,共8页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(51377009,51777009)。

摘　　要：针对直线感应电机初级和次级漏感不相等的特点,对直线感应电机静止状态下的参数辨识方法进行研究.首先,分别针对死区时间为0、1、2、3和4μs的情况进行场路联合有限元法仿真.利用PWM逆变器依次向直线感应电机中通入单相直流电压、单相交流高频电压和单相交流低频电压来获得等效电路中的各个参数.然后,将不同死区时间下的辨识结果与实际值进行比较,并进行误差对比,讨论不同的死区时间对辨识精度的影响.最后,分别分析死区效应对初级电阻及漏感、互感、次级电阻及漏感的辨识结果产生的影响.结果表明:在考虑到直线感应电机的初、次级漏感不相等的情况下提出的基于PWM逆变器的静止状态下参数辨识方法,辨识结果比较精确,验证了方法的正确性,死区效应的存在对直线电机各个参数的辨识结果均产生影响.In view of the fact that the primary and secondary leakage inductances of the linear induction motor are not equal,the parameter identification methods of the linear induction motor in static state is studied.Firstly,the field-circuit coupling finite element method simulation is performed under the dead time of 0,1,2,3 and 4μs.The PWM inverter is used to input single-phase DC voltage,single-phase high-frequency AC voltage,and single-phase low-frequency AC voltage into the linear induction motor sequentially to obtain parameters of the equivalent circuit.Then,the identification results under different dead time are compared with the actual values,and error comparison is conducted.Therefore the impact of different dead time on the accuracy of identification is discussed.Finally,the effect of the dead zone effect on the identification results of primary resistance,leakage inductance,mutual inductance,secondary resistance and leakage inductance are analyzed separately.The results show that the consequence of the parameter identification method based on PWM inverter are more accurate when considering the fact that primary and secondary leakage inductance of linear induction motor are not equal,and the correctness ofmethod is verified.The dead zone effect can impact the parameter identification results of linear motor.

关 键 词：直线感应电机 参数辨识 死区效应 场路联合有限元法仿真 

分 类 号：TM359.4[电气工程—电机]