直线感应电机离线参数辨识及关键辨识参量研究  

Off-line parameter estimation of a linear induction motor and the study for key parameters

作　　者：吕刚[1] 杨琛 LüGang;YANG Chen(School of Electrical Engineering,BeijingJiaotong 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：《电机与控制学报》2020年第2期55-62,共8页Electric Machines and Control

基　　金：国家自然科学基金(51777009,51377009)。

摘　　要：针对直线感应电机初级漏感和次级漏感不相等的特性,提出一种基于PWM逆变器的直线感应电机离线参数辨识方法。首先,在电机静止的条件下,先向电机中通入单相直流电压来获得初级电阻,再依次通入单相高频交流电压和单相低频交流电压来依次获得互感、次级漏感、初级漏感和次级电阻。其次,讨论了电机参数的辨识误差与频率变化的关系,给出了使用该方法时高频实验和低频实验中适用的频率范围,并建立了直线感应电机离线参数辨识模型来进行仿真实验。最后,针对不同功率的直线电机,将该方法辨识结果与传统的空载和堵转实验方法的辨识结果进行对比。结果表明,提出的辨识方法由于考虑了直线电机初、次级漏感不相等的特性,其辨识精确度更高。Considering that the primary leakage inductance and the secondary leakage inductance of the linear induction motor are not equal,a method based on PWM inverter for offline parameter identification of the linear induction motor is proposed.Firstly,under the static condition of the motor,the primary resistance was obtained by applying a single-phase DC voltage to the motor,and then the single-phase high-frequency AC voltage and the single-phase low-frequency AC voltage were sequentially applied to obtain mutual inductance,secondary leakage inductance,primary leakage inductance and secondary resistance in sequence.Secondly,the variation of the parameters following with frequency was discussed,and the applicable ranges of frequency in high-frequency test and low-frequency test when using this method were given.The simulation model for offline parameter identification of linear induction motor was established to perform the simulation experiments.Finally,the experiments for different linear induction motors showed the proposed identification method has higher recognition accuracy compared with the traditional method like no-load experiment and locked-rotor experiment,considering that the primary inductance and secondary inductance of linear induction motor are not equal.

关 键 词：直线感应电机 电机参数 等效电路 离线参数辨识 PWM逆变器 

分 类 号：TM359.4[电气工程—电机]