Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators
A new method for detecting demagnetization faults in axial flux permanent magnet synchronous wind generators is presented in this study. Demagnetization faults occur in the case of total or partial loss of the magnetic properties of one or more permanent magnets of the machine. Fault signatures appe...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/9/3220 |
| _version_ | 1797504967146209280 |
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| author | Apostolos Lamprokostopoulos Epameinondas Mitronikas Alexandra Barmpatza |
| author_facet | Apostolos Lamprokostopoulos Epameinondas Mitronikas Alexandra Barmpatza |
| author_sort | Apostolos Lamprokostopoulos |
| collection | DOAJ |
| description | A new method for detecting demagnetization faults in axial flux permanent magnet synchronous wind generators is presented in this study. Demagnetization faults occur in the case of total or partial loss of the magnetic properties of one or more permanent magnets of the machine. Fault signatures appearing in the current or voltage signal due to a demagnetization fault can often be confused with those produced by eccentricity faults, making the discrimination between the two types of faults difficult. The proposed methodology is based on the analysis of the instant power spectrum of the generator, combined with an estimator to derive the permanent magnet flux, based on the machine equations. Short-Time Fourier Transform is proposed as the means for spectrum analysis to ensure performance during variations of the generator speed. Results derived from the experimental tests are presented, which show that the proposed methodology is capable of detecting demagnetization faults and distinguishing them from eccentricity ones under a wide variety of operating conditions. |
| first_indexed | 2024-03-10T04:11:56Z |
| format | Article |
| id | doaj.art-3c9ff89632214d288b4e9f97f77438c7 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T04:11:56Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3c9ff89632214d288b4e9f97f77438c72023-11-23T08:08:12ZengMDPI AGEnergies1996-10732022-04-01159322010.3390/en15093220Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind GeneratorsApostolos Lamprokostopoulos0Epameinondas Mitronikas1Alexandra Barmpatza2Department of Electrical and Computer Engineering, University of Patras, 26504 Patras, GreeceDepartment of Electrical and Computer Engineering, University of Patras, 26504 Patras, GreeceDepartment of Electrical and Computer Engineering, University of Patras, 26504 Patras, GreeceA new method for detecting demagnetization faults in axial flux permanent magnet synchronous wind generators is presented in this study. Demagnetization faults occur in the case of total or partial loss of the magnetic properties of one or more permanent magnets of the machine. Fault signatures appearing in the current or voltage signal due to a demagnetization fault can often be confused with those produced by eccentricity faults, making the discrimination between the two types of faults difficult. The proposed methodology is based on the analysis of the instant power spectrum of the generator, combined with an estimator to derive the permanent magnet flux, based on the machine equations. Short-Time Fourier Transform is proposed as the means for spectrum analysis to ensure performance during variations of the generator speed. Results derived from the experimental tests are presented, which show that the proposed methodology is capable of detecting demagnetization faults and distinguishing them from eccentricity ones under a wide variety of operating conditions.https://www.mdpi.com/1996-1073/15/9/3220permanent magnet synchronous machinesgeneratorsfault detectiondemagnetization |
| spellingShingle | Apostolos Lamprokostopoulos Epameinondas Mitronikas Alexandra Barmpatza Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators Energies permanent magnet synchronous machines generators fault detection demagnetization |
| title | Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators |
| title_full | Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators |
| title_fullStr | Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators |
| title_full_unstemmed | Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators |
| title_short | Detection of Demagnetization Faults in Axial Flux Permanent-Magnet Synchronous Wind Generators |
| title_sort | detection of demagnetization faults in axial flux permanent magnet synchronous wind generators |
| topic | permanent magnet synchronous machines generators fault detection demagnetization |
| url | https://www.mdpi.com/1996-1073/15/9/3220 |
| work_keys_str_mv | AT apostoloslamprokostopoulos detectionofdemagnetizationfaultsinaxialfluxpermanentmagnetsynchronouswindgenerators AT epameinondasmitronikas detectionofdemagnetizationfaultsinaxialfluxpermanentmagnetsynchronouswindgenerators AT alexandrabarmpatza detectionofdemagnetizationfaultsinaxialfluxpermanentmagnetsynchronouswindgenerators |