Incipient winding fault detection and diagnosis for squirrel-cage induction motors equipped on CRH trains

• Published in: ISA transactions Vol. 99; pp. 488 - 495
• Main Authors: Wu, Yunkai, Jiang, Bin, Wang, Yulong
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 01.04.2020
• Subjects: CRH trains; Incipient stator/rotor winding fault; Robust fault diagnosis; CRH trains; Robust fault diagnosis; Incipient stator/rotor winding fault
• ISSN: 0019-0578; 1879-2022; 1879-2022
• DOI: 10.1016/j.isatra.2019.09.020

Stator/rotor winding faults are the common faults in squirrel-cage induction motor systems, which motivates the study of incipient fault detection and isolation (IFDI) to improve the safety and reliability of CRH (China Railway High-speed) trains. In this paper, a dynamic model for squirrel caged induction motor in d-q coordinate system is established firstly, further, the models and characteristics of incipient broken-rotor-bar fault and turn-to-turn short fault are analyzed. After that, a novel robust diagnosis design is proposed for the possible incipient stator/rotor winding faults. Experimental analyses show that the detection and isolation scheme designed in this paper provides high sensitivity and accurate isolation to incipient winding faults. •Fault characteristics of stator/rotor winding are analyzed.•The incipient winding fault models are obtained.•A robust observer based incipient fault detection/isolation scheme is proposed.•The scheme proposed provides high sensitivity to incipient winding faults.