Transistor-Clamped H-Bridge Based Cascaded Multilevel Inverter With New Method of Capacitor Voltage Balancing

This paper presents a three-phase cascaded multilevel inverter that uses five-level transistor-clamped H-bridge power cells. Multicarrier phase-shifted pulse-width modulation method is used to achieve balanced power distribution among the power cells. A new method to balance the midpoint capacitor v...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2013-08, Vol.60 (8), p.2943-2956
Main Authors: Rahim, N. A., Elias, M. F. M., Wooi Ping Hew
Format: Article
Language:English
Subjects:
Capacitors
Cascaded H-bridge
cascaded neutral-point-clamped inverter
five-level inverter
Frequency modulation
Harmonic analysis
Inverters
multicarrier phase-shifted pulse-width modulation (CPS-PWM)
multilevel inverter
Pulse width modulation
Switches
transistor-clamped converter
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Summary:This paper presents a three-phase cascaded multilevel inverter that uses five-level transistor-clamped H-bridge power cells. Multicarrier phase-shifted pulse-width modulation method is used to achieve balanced power distribution among the power cells. A new method to balance the midpoint capacitor voltage in each cell is developed and tested. The analysis of the output voltage harmonics and the total power losses covering the conduction and the switching power losses are carried out and compared with the cascaded neutral-point-clamped and the conventional cascaded H-bridge inverters. For verifications, the proposed inverter is experimentally tested on an induction motor. From the results, the proposed inverter provides higher output quality with relatively lower power loss as compared to the other conventional inverters with the same output quality.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2012.2200213