Cascaded Multioutput Multilevel Converter: Modulation and Operating Limits

This article presents the modulation and operating limits of the modified cascaded multioutput multilevel converter. A phase-disposition pulsewidth modulation strategy is developed to apply the optimal state that leads to a minimized device switching. A Hamming distance-based cost function is adopte...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 69; no. 1; pp. 399 - 408
Main Authors Hussein, Ahmed S., Ghias, Amer M. Y. M.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Converters
Cost function
Dual-output converters
Hamming distance
Modulation
Multilevel converters
optimal state
power losses
Pulse duration
Switches
Switching
Switching frequency
Topology
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Summary:This article presents the modulation and operating limits of the modified cascaded multioutput multilevel converter. A phase-disposition pulsewidth modulation strategy is developed to apply the optimal state that leads to a minimized device switching. A Hamming distance-based cost function is adopted to evaluate the number of device transitions. The cost function is further modified to identify the optimal state from a number of feasible states. Moreover, the operating limits of the converter are analyzed for the safe and valid operation of the converter. Simulation and experiment results validate the theoretical analysis, and the converter is operational under a wide range of operation points. The proposed optimal state modulation strategy is shown to be effective in reducing the average device switching frequency.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2021.3050374