A Hybrid Nine-Arm Modular Multilevel Converter for Medium-Voltage Six-Phase Machine Drives

The nine-arm modular multilevel converter (9A-MMC) has been recently proposed as a reduced MMC topology variation for six-phase drive applications, with 25% reduction in the number of employed arms and associated components, compared to a standard dual three-phase MMC, however with a limited output...

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Published in:IEEE transactions on industrial electronics (1982) 2019-09, Vol.66 (9), p.6681-6691
Main Authors: Diab, Mohamed S., Elserougi, Ahmed A., Massoud, Ahmed M., Ahmed, Shehab, Williams, Barry W.
Format: Article
Language:English
Subjects:
Computer simulation
Converters
Electric potential
Experimentation
Hybrid modular multilevel converter (MMC)
Inverters
Machine control
Mathematical analysis
medium-voltage (MV) machine drive
Modular multilevel converters
nine-arm MMC
Reduction
six-phase machines
Topology
Voltage source converters
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cited_by cdi_FETCH-LOGICAL-c333t-7e45c69743dbc538bf419427ed80b3f53d3bd90a97b1d7097256ab75b44dbd9f3
cites cdi_FETCH-LOGICAL-c333t-7e45c69743dbc538bf419427ed80b3f53d3bd90a97b1d7097256ab75b44dbd9f3
container_end_page 6691
container_issue 9
container_start_page 6681
container_title IEEE transactions on industrial electronics (1982)
container_volume 66
creator Diab, Mohamed S.
Elserougi, Ahmed A.
Massoud, Ahmed M.
Ahmed, Shehab
Williams, Barry W.
description The nine-arm modular multilevel converter (9A-MMC) has been recently proposed as a reduced MMC topology variation for six-phase drive applications, with 25% reduction in the number of employed arms and associated components, compared to a standard dual three-phase MMC, however with a limited output voltage amplitude. This paper proposes a hybrid 9A-MMC comprised of half-bridge submodules (SMs) in both the upper and lower arms, and full-bridge SMs in the middle arms. By employing the negative-voltage state of the full-bridge SMs, the hybrid 9A-MMC avoids the limitations imposed on the dc-link voltage utilization, while achieving further reduction in the component count, compared to a standard 9A-MMC with identical half-bridge SMs. The operating principles of the proposed hybrid 9A-MMC are illustrated with mathematical analysis, whereas its characteristics are verified through both simulation and experimentation. An assessment of the proposed topology quantifying its employed components is also provided, in comparison to other MMC-based six-phase machine drives.
doi_str_mv 10.1109/TIE.2018.2880663
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subjects Computer simulation
Converters
Electric potential
Experimentation
Hybrid modular multilevel converter (MMC)
Inverters
Machine control
Mathematical analysis
medium-voltage (MV) machine drive
Modular multilevel converters
nine-arm MMC
Reduction
six-phase machines
Topology
Voltage source converters
title A Hybrid Nine-Arm Modular Multilevel Converter for Medium-Voltage Six-Phase Machine Drives
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