Voltage-balancing method using phase-shifted PWM for the flying capacitor multilevel converter
| Autor: | Amer M. Y. M. Ghias, Vassilios G. Agelidis, Josep Pou, Mihai Ciobotaru |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. TIEG - Terrassa Industrial Electronics Group, Universitat Politècnica de Catalunya. (TIEG) - Terrassa Industrial Electronics Group |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Engineering
Modulation (Electronics) Capacitor voltage balancing business.industry Rotary converters Ćuk converter Proportional control Capacitors Converters Decoupling capacitor multilevel converter Reguladors de voltatge Convertidors rotatius Control theory Duty cycle flying capacitor (FC) converter Boost converter Electronic engineering Transient (oscillation) Electrical and Electronic Engineering business Modulació (Electrònica) Pulse-width modulation phase-shifted pulse width modulation (PS-PWM) |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya Universitat Jaume I |
| DOI: | 10.1109/TPEL.2013.2285387 |
| Popis: | Multilevel flying capacitor (FC) converters provide natural capacitor voltage balance under phase-shifted pulse width modulation (PS-PWM). However, natural balancing may not be robust enough to maintain the voltages at the reference values, especially under certain transient conditions. Furthermore, natural balancing dynamics depend on the load and it may be very slow in some practical applications. Therefore, a more robust balancing mechanism of maintaining the FC voltages at the desired values is required. This paper proposes a new closed-loop voltage-balancing method for the multilevel FC converters using PS-PWM. The proposed method balances the voltages of the FCs by modifying the duty cycle of each switch of the FC converter using a proportional controller. The crossed effect between FC currents and duty cycles is considered and is used for optimal FC voltage balancing. Simulation and experimental results verify that the proposed voltage-balancing method is very robust to different operating conditions, such as load transients, linear/nonlinear and unbalanced loads |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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