Detection of Inter-turn Faults in Five-Phase Permanent Magnet Synchronous Motors
Five-phase permanent magnet synchronous motors (PMSMs) have inherent fault-tolerant capabilities. This paper analyzes the detection of inter-turn short circuit faults in five-phase PMSMs in their early stage, i.e. with only one turn in short circuit by means of the analysis of the stator currents...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Stefan cel Mare University of Suceava
2014-11-01
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| Series: | Advances in Electrical and Computer Engineering |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.4316/AECE.2014.04008 |
| Summary: | Five-phase permanent magnet synchronous motors (PMSMs) have inherent fault-tolerant capabilities. This paper analyzes
the detection of inter-turn short circuit faults in five-phase PMSMs in their early stage, i.e. with only one turn
in short circuit by means of the analysis of the stator currents and the zero-sequence voltage component (ZSVC) spectra.
For this purpose, a parametric model of five-phase PMSMs which accounts for the effects of inter-turn short circuits
is developed to determine the most suitable harmonic frequencies to be analyzed to detect such faults. The amplitudes
of these fault harmonic are analyzed in detail by means of finite-elements method (FEM) simulations, which corroborate
the predictions of the parametric model. A low-speed five-phase PMSM for in-wheel applications is studied and modeled.
This paper shows that the ZSVC-based method provides better sensitivity to diagnose inter-turn faults in the analyzed
low-speed application. Results presented under a wide speed range and different load levels show that it is feasible
to diagnose such faults in their early stage, thus allowing applying a post-fault strategy to minimize their effects
while ensuring a safe operation. |
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| ISSN: | 1582-7445 1844-7600 |