Interturn Short Fault Diagnosis in a PMSM by Voltage and Current Residual Analysis With the Faulty Winding Model

As interturn short fault (ISF) in a permanent-magnet synchronous machine (PMSM) degrades its energy efficiency and may cause other problems, accurate fault diagnosis for the PMSMs is necessary. In this paper, we present a method that uses voltage and current residual components to diagnose the phase...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2018-03, Vol.33 (1), p.190-198
Main Authors: Moon, Seokbae, Jeong, Hyeyun, Lee, Hojin, Kim, Sang Woo
Format: Article
Language:English
Subjects:
Analytical models
Circuit faults
Electric potential
Fault diagnosis
fault index
faulty winding model
interturn short fault
Mathematical model
Permanent magnets
PMSM
Radio frequency
Stator windings
Synchronous machines
Winding
Windings
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Summary:As interturn short fault (ISF) in a permanent-magnet synchronous machine (PMSM) degrades its energy efficiency and may cause other problems, accurate fault diagnosis for the PMSMs is necessary. In this paper, we present a method that uses voltage and current residual components to diagnose the phase and the severity of the ISF in PMSMs. A faulty-winding model (FWM) is introduced to analyze the fault; the model describes a relationship between the voltage decrease of the faulty winding to the characteristics of the fault such as a fault resistance and a fault turn ratio. Based on the model, we suggest a fault index (FI) that shows the severity of the ISF. As the ISF induces residual components to both voltage and current, the proposed method utilized those components with the FWM. A least squares (LS) method is used to estimate the FI and to diagnose the ISF of PMSMs. Experimental results demonstrate that the proposed method diagnose the ISF effectively.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2017.2726142