Estimation of the capacitor voltages in flying capacitor multi-level converters
Flying capacitor multi-level converters use charged capacitors as a critical element. For proper operation, the capacitor voltages must be known and regulated. Direct measurement is straightforward, but when the number of required measurements is high, this is a complicated approach. This paper int...
| Autores principales: | , |
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| Formato: | Artículo |
| Lenguaje: | inglés |
| Publicado: |
John Wiley & Sons Ltd
2021
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| Materias: | |
| Acceso en línea: | http://eprints.uanl.mx/24859/1/24859x.pdf |
| _version_ | 1824420000761380864 |
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| author | Escalante, Miguel F. Erdmann Olvera, Alex Paul |
| author_facet | Escalante, Miguel F. Erdmann Olvera, Alex Paul |
| author_sort | Escalante, Miguel F. |
| collection | Repositorio Institucional |
| description | Flying capacitor multi-level converters use charged capacitors as a critical element. For proper operation, the capacitor voltages must be known and regulated. Direct measurement is straightforward, but when the number of required measurements is high, this is a
complicated approach. This paper introduces an estimation method for n capacitor voltages. The scheme is based on a system of (n + 1) equations, which is defined in a way that it incorporates information of the actual capacitor voltages and open-loop estimates of the capacitor voltages. The solution of the system gives the best estimates of the capacitor voltages in the sense of least square errors. The method requires only output voltage and output current sensors and its computational burden is low, saving cost and design efforts,
and simplifying the hardware system. The performance of the proposed scheme is evaluated experimentally in a 9-level flying capacitor chopper, where the estimates are used by the voltage balancing strategy and by the output current controller. |
| format | Article |
| id | eprints-24859 |
| institution | UANL |
| language | English |
| publishDate | 2021 |
| publisher | John Wiley & Sons Ltd |
| record_format | eprints |
| spelling | eprints-248592023-05-07T04:22:45Z http://eprints.uanl.mx/24859/ Estimation of the capacitor voltages in flying capacitor multi-level converters Escalante, Miguel F. Erdmann Olvera, Alex Paul TK Ingeniería Eléctrica, Electrónica, Ingeniería Nuclear Flying capacitor multi-level converters use charged capacitors as a critical element. For proper operation, the capacitor voltages must be known and regulated. Direct measurement is straightforward, but when the number of required measurements is high, this is a complicated approach. This paper introduces an estimation method for n capacitor voltages. The scheme is based on a system of (n + 1) equations, which is defined in a way that it incorporates information of the actual capacitor voltages and open-loop estimates of the capacitor voltages. The solution of the system gives the best estimates of the capacitor voltages in the sense of least square errors. The method requires only output voltage and output current sensors and its computational burden is low, saving cost and design efforts, and simplifying the hardware system. The performance of the proposed scheme is evaluated experimentally in a 9-level flying capacitor chopper, where the estimates are used by the voltage balancing strategy and by the output current controller. John Wiley & Sons Ltd 2021 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/24859/1/24859x.pdf http://eprints.uanl.mx/24859/1.haspreviewThumbnailVersion/24859x.pdf Escalante, Miguel F. y Erdmann Olvera, Alex Paul (2021) Estimation of the capacitor voltages in flying capacitor multi-level converters. IET Power Electron (14). pp. 651-665. |
| spellingShingle | TK Ingeniería Eléctrica, Electrónica, Ingeniería Nuclear Escalante, Miguel F. Erdmann Olvera, Alex Paul Estimation of the capacitor voltages in flying capacitor multi-level converters |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Estimation of the capacitor voltages in flying capacitor multi-level converters |
| title_full | Estimation of the capacitor voltages in flying capacitor multi-level converters |
| title_fullStr | Estimation of the capacitor voltages in flying capacitor multi-level converters |
| title_full_unstemmed | Estimation of the capacitor voltages in flying capacitor multi-level converters |
| title_short | Estimation of the capacitor voltages in flying capacitor multi-level converters |
| title_sort | estimation of the capacitor voltages in flying capacitor multi level converters |
| topic | TK Ingeniería Eléctrica, Electrónica, Ingeniería Nuclear |
| url | http://eprints.uanl.mx/24859/1/24859x.pdf |
| work_keys_str_mv | AT escalantemiguelf estimationofthecapacitorvoltagesinflyingcapacitormultilevelconverters AT erdmannolveraalexpaul estimationofthecapacitorvoltagesinflyingcapacitormultilevelconverters |