一种基于PLL的牵引电机速度辨识算法  

Speed Identification Algorithm of Traction Motor based on PLL

作　　者：鞠艳杰[1] 黄石军 左运 JU Yanjie;HUANG Shijun;ZUO Yun(School of Electronics and Information Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学电气信息工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2021年第4期106-110,共5页Journal of Dalian Jiaotong University

摘　　要：提出一种基于PLL的速度辨识算法,在此算法中引入闭环转子磁链观测器和幅值归一化环节,弥补PLL本身在抗干扰能力上的不足.通过闭环转子磁链观测模型抑制了转子磁链中可能出现的直流偏置,引入幅值归一化环节抑制了可能出现的转子磁链幅值波动。在仿真软件中搭建模型进行验证,结果表明在电机速度指令突变以及负载转矩突变的情况下可以保持较好的辨识效果。通过仿真结果验证了所研究速度辨识算法的正确性和有效性.In order to improve the reliability of the traction drive system, the speed sensorless control technology of traction motors has drawn more and more attention from scholars. A PLL-based speed identification algorithm is proposed, and a closed-loop rotor flux observer and amplitude normalization are introduced to make up for the lack of anti-interference ability of the PLL itself. The closed-loop rotor flux observation model suppresses the possible DC offset in the rotor flux, and the amplitude normalization link is introduced to suppress the possible fluctuation of the rotor flux amplitude. The model is built in the simulation software for verification. The results show that the identification effect can be maintained under the condition of sudden change of motor speed command and sudden change of load torque. The simulation results verify the correctness and effectiveness of the speed identification algorithm studied.

关 键 词：牵引电机 PLL 闭环转子磁链观测器 幅值归一化 

分 类 号：TM922.71[电气工程—电力电子与电力传动]