An Impedance Identification Approach to Sensitive Detection and Location of Stator Turn-to-Turn Faults in a Closed-Loop Multiple-Motor Drive

A single closed-loop inverter drive with multiple motors connected to it is a type of drive topology commonly used in steel processing industry, electric railway systems, and electric vehicles. However, condition monitoring for this type of drive configuration remains largely unexplored. This paper...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2011-05, Vol.58 (5), p.1545-1554
Main Authors: Cheng, S, Zhang, P, Habetler, T G
Format: Article
Language:English
Subjects:
Current control
Electric vehicles
Electrical fault detection
Fault detection
Fault diagnosis
fault location
Faults
Goertzel algorithm
Impedance
induction motor drive
Inverters
machine windings
Metals industry
Motors
parallel machines
Position (location)
Rail transportation
Railway engineering
stator turn faults
Stators
Steel
Studies
symmetrical components
Topology
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Summary:A single closed-loop inverter drive with multiple motors connected to it is a type of drive topology commonly used in steel processing industry, electric railway systems, and electric vehicles. However, condition monitoring for this type of drive configuration remains largely unexplored. This paper proposes an impedance identification approach to detect and locate the stator turn-to-turn fault in a multiple-motor drive system. Sensitive and fast fault detection is achieved by utilizing the characteristics of current regulators in the motor controller. Experimental results show that the proposed method can reliably detect and locate the stator turn fault on two shaft-coupled 5-hp induction machines under different operating conditions and fault levels with no need of any machine parameters. Although originally developed for multiple-motor drives, the detection scheme can also be directly applied to most of the conventional closed-loop induction motor drives.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2010.2064276