Efficient Modulation Technique for a Four-Leg Fault-Tolerant Neutral-Point-Clamped Inverter

This paper presents a new low-loss modulation technique for the hybrid three-level four-leg converter. The total losses of the converter are reduced on about 18% in average compared to the standard three-leg neutral-point-clamped converter. Furthermore, the low-frequency voltage oscillation in the n...

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Bibliographic Details
Main Authors: Ceballos, S., Pou, J., Zaragoza, J., Martin, J.L., Robles, E., Gabiola, I.
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
Diodes
Fault tolerance
Inverters
Leg
low losses
Multilevel converter
Network topology
neutral-point-clamped (NPC) converter
reliability
Snubbers
Switching converters
Switching loss
Voltage
voltage oscillation
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Summary:This paper presents a new low-loss modulation technique for the hybrid three-level four-leg converter. The total losses of the converter are reduced on about 18% in average compared to the standard three-leg neutral-point-clamped converter. Furthermore, the low-frequency voltage oscillation in the neutral-point is completely cancelled, and maximum benefit of the dc-link voltage is obtained. All these facts, together with the fault-tolerant ability due to the fourth leg, make this topology very interesting for applications such as wind generation, in which it is important to maximize efficiency and reliability. Some experimental results confirm good performance of the proposed modulation technique
ISSN:1553-572X
DOI:10.1109/IECON.2006.348023