Induction Motor Speed Sensorless Vector Control System Based on Closed-Loop Flux Observer with Virtual Voltage Injection

被引：0

作者：

Wang Z. ^{[1
]}

Sun W. ^{[1
]}

Jiang D. ^{[1
]}

机构：

[1] School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan

来源：

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2022年 / 37卷 / 02期

关键词：

Closed-loop flux observer; Induction motor; Speed sensorless; Virtual voltage injection;

D O I：

10.19595/j.cnki.1000-6753.tces.L90249

中图分类号：

学科分类号：

摘要：

For many years, the instability problem of the induction motor speed sensorless vector control system in the low synchronous speed range has not been solved. It results from the unobservable system state variables, the unstable pole distribution and the poor robustness of the motor parameters. If and only if the three problems are solved simultaneously, the instability problem in the low synchronous speed range can be solved. In this paper, a virtual voltage injection method is adopted based on the classical closed-loop flux observer to improve its stability in the low speed range. Different from the traditional high frequency/low frequency signal injection method, the virtual voltage is injected into the observer rather than the motor. It can solve the observability of the system state variables, the stability of the pole distribution and the robustness of the motor parameters at the same time. Finally, the stable operation of the system can be achieved in the low synchronous speed range. © 2022, Electrical Technology Press Co. Ltd. All right reserved.

引用

页码：332 / 343

页数：11

共 19 条

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