TY - GEN
T1 - Enhancement of carrier-based modulation strategies for multilevel converters
AU - Pou, J.
AU - Rodriguez, P.
AU - Zaragoza, J.
AU - Sala, V.
AU - Jaén, C.
AU - Boroyevich, D.
PY - 2005
Y1 - 2005
N2 - Carrier-based modulation strategies can be improved by inclusion of zero sequences in the modulation signals. In this paper, the modulation signals of a three-level neutral-point-clamped converter are modified to achieve maximum benefit of the dc-link voltage, and to help achieve voltage balance between the dc-link capacitors. The proposed strategy is obtained from the analysis of space-vector modulation patterns. Therefore, compared to standard sinusoidal PWM, 15% larger amplitudes of the output voltage fundamentals, better voltage-balancing performance, and lower switching frequencies in the devices can all be achieved. Furthermore, implementation of this modulation technique in a digital-signal processor is much easier than space-vector modulation, and also lowers processing time requirements. Efficiency of the modulation algorithm is verified by simulation and experiment.
AB - Carrier-based modulation strategies can be improved by inclusion of zero sequences in the modulation signals. In this paper, the modulation signals of a three-level neutral-point-clamped converter are modified to achieve maximum benefit of the dc-link voltage, and to help achieve voltage balance between the dc-link capacitors. The proposed strategy is obtained from the analysis of space-vector modulation patterns. Therefore, compared to standard sinusoidal PWM, 15% larger amplitudes of the output voltage fundamentals, better voltage-balancing performance, and lower switching frequencies in the devices can all be achieved. Furthermore, implementation of this modulation technique in a digital-signal processor is much easier than space-vector modulation, and also lowers processing time requirements. Efficiency of the modulation algorithm is verified by simulation and experiment.
UR - http://www.scopus.com/inward/record.url?scp=33847704215&partnerID=8YFLogxK
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U2 - 10.1109/PESC.2005.1581989
DO - 10.1109/PESC.2005.1581989
M3 - Conference contribution
AN - SCOPUS:33847704215
SN - 0780390334
SN - 9780780390331
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 2534
EP - 2539
BT - 36th IEEE Power Electronics Specialists Conference 2005
ER -