永磁同步电机电流传感器故障诊断及容错控制  

Stator Current Sensor Fault Detection and Tolerant Control for Permanent Magnet Synchronous Motor

作　　者：林京京 沈艳霞 LIN Jingjing;SHEN Yanxia(Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Jiangnan University, Wuxi 214122, China)

机构地区：[1]江南大学物联网技术应用教育部工程研究中心

出　　处：《信息与控制》2019年第3期354-363,384,共11页Information and Control

基　　金：国家自然科学基金资助项目(61573167);中央高校基本科研业务费专项资金资助项目(JUSRP51510)

摘　　要：电流传感器对永磁同步电机矢量控制系统的稳定性和安全性十分重要.为实现电流传感器的故障诊断及其容错控制,提出了一种简单的逻辑判断策略,该策略基于αβ相电流构造3个故障判断因子以实现故障判断,一相电流传感器故障时,根据基尔霍夫定律重构电流;两相以上故障时,基于李亚普诺夫稳定性定理设计自适应反推观测器进行电流估计,以确保系统稳定运行.在低速和高速运行状态下分别进行了仿真和实验,证明了该策略能够快速诊断故障、准确判断故障相,并基于逻辑判断策略稳定地重构电流,具有较高的可行性和可靠性.In the vector control system of a permanent magnet synchronous machine, current sensors are very important for system stability and safety. To realize the fault diagnosis and fault-tolerant control when faults occur in current sensors, a simple algorithmic/logical diagnosis mechanism was designed based on αβ phase currents, and then fault judgment factors were constructed. For the case where only one current sensor fails, the current was reconstructed according to Kirchhoff's law, while for two or more sensors failure, an adaptive backstepping observer was designed based on Lyapunov's stability theorem to estimate the current and ensure the stable operation of system. Simulations and experiments were carried out under low and high speeds. The results show that this fault-tolerant control strategy can diagnose faults quickly and reconstruct the current stably, which verifies the effectiveness and reliability of the proposed method.

关 键 词：永磁同步电机 故障诊断 容错控制 自适应反推观测器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]