An Improved Stator Flux Observation Method of Permanent Magnet Synchronous Motor  

作　　者：Guangjing Su Hongmei Li Ying Dai Zheng Li 

机构地区：[1]School of Electrical Engineering and Automation,Hefei University of Technology [2]School of Electrical Engineering,Hebei University of Science and Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2016年第6期90-96,共7页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.51377041)

摘　　要：The stator flux and electromagnetic torque observation is the basis of direct torque controlled permanent magnet synchronous motor( PMSM) drive system. However,the traditional stator flux observer based on voltage model is affected by integral initial values and integral drift,that based on current model is affected by the parameters of PMSM,so a new stator flux observation method is proposed based on an improved secondorder generalized integrator( SOGI). Compared to the stator flux observation method based on the conventional SOGI,the proposed method can not only overcome the influence of integral initial values and integral drift,but also completely eliminate the DC offset's influence. Therefore,the observation accuracy of stator flux is further improved. The simulation and experimental results both show that the proposed method has a higher stator flux and electromagnetic torque observation precision.The stator flux and electromagnetic torque observation is the basis of direct torque controlled permanent magnet synchronous motor （PMSM） drive system. However, the traditional stator flux observaer based on voltage model is affected by integral initial values and integral drift, that based on current model is affected by the parameters of PMSM, so a new,stator flux observation method is proposed based on an improved second- order generalized integrator （SOGI）. Compared to the stator flux observation method based on the conventional SOGI, the proposed method can not only overcome the influence of integral initial values and integral drift, but also completely eliminate the DC offset’s influence. Therefore, the observation accuracy of stator flux is further improved. The simulation and experimental results both show that the proposed method has a higher stator flux and electromagnetic torque observation precision.

关 键 词：permanent magnet synchronous motor direct torque control second-order generalized integrator stator flux observation electromagnetic torque observation 

分 类 号：TM341[电气工程—电机]