A strong robustness open-circuit fault diagnosis strategy for novel fault-tolerant electric drive system based on d-q-axis current signal  

作　　者：Xuefeng JIANG Shaoshuai WANG Jie LI Daoyu WU Wenxin HUANG Zhenmao HAN 

机构地区：[1]School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China [2]College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [3]Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration,Nanjing 211106,China

出　　处：《Chinese Journal of Aeronautics》2021年第10期115-127,共13页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51807094);China Postdoctoral Science Foundation(No.2020M671499);Program for HighLevel Entrepreneurial and Innovative Talents Introduction of Jiangsu Province,China(No.[2019]20);Aeronautical Science Foundation of China(No.20200028059001);Jiangsu Planned Projects for Postdoctoral Research Funds,China(No.2020Z145)。

摘　　要：To diagnose the Open-Circuit(OC)fault in the novel fault-tolerant electric drive system,based on d-q-axis current signal,a strong robustness diagnosis strategy is proposed and investigated.Fewer independent power supplies and converters are required in the novel fault-tolerant electric drive system based on Dual-Winding Permanent Magnet Motor(DWPMM),and the system’s reliability,usage ratio and power density have been improved compared to the conventional fault-tolerant motor drive system.However,the novel fault-tolerant electric drive system has the OC fault diagnostic false alarms issue when load changes suddenly or under light-load condition.And it lacks the research on the diagnostic method when the system encounters intermittent OC fault in power switches.By theory derivation,simulation and experimental verification,it can be concluded that the proposed strong robustness OC fault diagnosis strategy based on d-q-axis current signal can overcome the OC fault diagnostic false alarms issue when load changes suddenly or under light-load condition.And it can detect and locate the OC fault of single-phase winding in real time,and diagnose the intermittent OC fault of power switches.

关 键 词：Dual-winding motor Electric drive system Fault-tolerant system Open-circuit fault diagnosis Permanent magnet motor Strong robustness 

分 类 号：V267[航空宇航科学与技术—航空宇航制造工程]