The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive
© 2017 IEEE. DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the elect...
| Main Authors: | , , , , |
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| Format: | Conference Paper |
| Published: |
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/66216 |
| _version_ | 1848761267203866624 |
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| author | Wang, H. Davari, P. Kumar, D. Zare, Firuz Blaabjerg, F. |
| author_facet | Wang, H. Davari, P. Kumar, D. Zare, Firuz Blaabjerg, F. |
| author_sort | Wang, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 IEEE. DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this paper investigates the impact of grid voltage amplitude and phase unbalances on the lifetime of DC-link capacitors used in a standard three-phase motor drive. The theoretical stress models and experimental measurements of the capacitor voltages and ripple currents are presented. The relationship between the DC-link capacitor lifetime and the level of unbalances and loads are discussed based on a 7.5 kW motor drive system. The results serve as a guideline to size the DC-link capacitors to be robust enough at the presence of grid unbalance conditions. |
| first_indexed | 2025-11-14T10:28:57Z |
| format | Conference Paper |
| id | curtin-20.500.11937-66216 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:28:57Z |
| publishDate | 2017 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-662162018-04-30T02:49:02Z The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive Wang, H. Davari, P. Kumar, D. Zare, Firuz Blaabjerg, F. © 2017 IEEE. DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this paper investigates the impact of grid voltage amplitude and phase unbalances on the lifetime of DC-link capacitors used in a standard three-phase motor drive. The theoretical stress models and experimental measurements of the capacitor voltages and ripple currents are presented. The relationship between the DC-link capacitor lifetime and the level of unbalances and loads are discussed based on a 7.5 kW motor drive system. The results serve as a guideline to size the DC-link capacitors to be robust enough at the presence of grid unbalance conditions. 2017 Conference Paper http://hdl.handle.net/20.500.11937/66216 10.1109/ECCE.2017.8096748 restricted |
| spellingShingle | Wang, H. Davari, P. Kumar, D. Zare, Firuz Blaabjerg, F. The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive |
| title | The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive |
| title_full | The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive |
| title_fullStr | The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive |
| title_full_unstemmed | The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive |
| title_short | The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive |
| title_sort | impact of grid unbalances on the reliability of dc-link capacitors in a motor drive |
| url | http://hdl.handle.net/20.500.11937/66216 |