A five-level inverter topology with single-DC supply by cascading a flying capacitor inverter and an H-bridge
In this paper, a new three-phase, five-level inverter topology with a single-dc source is presented. The proposed topol- ogy is obtained by cascading a three-level flying capacitor inverter with a flying H-bridge power cell in each phase. This topology has redundant switching states for generating d...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/23525 |
| Acceso en línea: | http://hdl.handle.net/11441/23525 |
| Access Level: | acceso abierto |
| Palabra clave: | Flying capacitor (FC) H-bridge induction motor drive multilevel inverter |
| Sumario: | In this paper, a new three-phase, five-level inverter topology with a single-dc source is presented. The proposed topol- ogy is obtained by cascading a three-level flying capacitor inverter with a flying H-bridge power cell in each phase. This topology has redundant switching states for generating different pole voltages. By selecting appropriate switching states, the capacitor voltages can be balanced instantaneously (as compared to the fundamen- tal) in any direction of the current, irrespective of the load power factor. Another important feature of this topology is that if any H-bridge fails, it can be bypassed and the configuration can still operate as a three-level inverter at its full power rating. This fea- ture improves the reliability of the circuit. A 3-kW induction motor is run with the proposed topology for the full modulation range. The effectiveness of the capacitor balancing algorithm is tested for the full range of speed and during the sudden acceleration of the motor. |
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