基于重构电压的感应电机等效参数离线辨识  

Off-line parameter identification for induction motor based on reconstructed voltage

作　　者：赵飞翔[1] 张建伟[1] 郭孔辉[1] 张立浩[1] 郑重[2] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]吉林大学汽车工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2013年第6期1596-1600,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：'973'国家高技术研究发展计划项目(2011CB711201);部委科技项目(B2220110006)

摘　　要：分析了传统感应电机参数离线辨识方法的优缺点以及辨识所得结果难以用于在线模型的原因;在逆变器供电条件下将功率器件的内阻等效至电机定子内阻,通过用在离线情况下对逆变器理论电压进行修正的方法来消除死区时间所引起的误差电压,并使用遗传算法对感应电机等效参数进行辨识;参数验证实验结果表明:通过该方法辨识得到的电机参数能够准确描述特定逆变器供电条件下感应电机的稳态和暂态响应。Vector control schemes for induction motor drive systems have been widely adopted in high performance applications. Vector control transforms the control of an induction motor to that of separately excited dc motor by creating independent channels for flux and torque control. Crucial to the success of a vector control scheme is the knowledge of the instantaneous position of the rotor flux. The position of the rotor flux is estimated in the direct vector control scheme, which requires a priori knowledge of the machine parameters. Identification of machine parameters is a basic step in designing a motor controller. In traditional method, voltage required for off-line identification of induction motor parameters is commonly obtained by filter circuit and data acquisition equipment, and the equivalent circuit of the induction motor is usually modified. The reason that traditional off-line identification result of induction motor parameters is not suitable to online model is analyzed. The internal resistance of the power devices is equivalised to the stator resistance of the motor first. Then the voltage distortion caused by dead-time is eliminated through offline voltage correction. Finally, a genetic algorithm is used to identify the equivalent electrical parameters of induction motor. Experiment results show that the parameters obtained by this method can accurately describe the steady-state and transient response of the induction motor under specific inverter power supplying conditions.

关 键 词：电气工程 感应电机 参数辨识 重构电压 误差修正 遗传算法 

分 类 号：TM343[电气工程—电机]