Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives

Mohamed S. Diab; Grain P. Adam; B. W. Williams; Ahmed M. Massoud; Shehab Ahmed

doi:10.1109/APEC.2018.8341237

Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives

Mohamed S. Diab, Grain P. Adam, B. W. Williams, Ahmed M. Massoud, Shehab Ahmed

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

21 Scopus citations

Abstract

This paper proposes a hybrid converter for medium-voltage six-phase machine drive systems that mixes the operation of a traditional two-level voltage-source inverter and the modular multilevel converter (MMC) to enable operation over a wide frequency range. Topologically, the proposed converter consists of nine arms resembling two sets of three-phase MMCs with three common arms, yielding a nine-arm MMC with a 25% reduction in the number of employed arms compared to a traditional dual three-phase MMC. The multilevel property of a standard MMC is emulated in the proposed converter, however on a two-level basis, resulting in a stepped two-level output voltage waveform. The proposed converter has a reduced footprint with advantages of small voltage steps, modular structure, and ease of scalability. Further, it is able to drive high-power six-phase machines within low operating frequencies at the rated torque. The operating principle of the converter is elaborated, and its modulation scheme is discussed. The features of the proposed converter are verified through simulations and experimentally.

Original language	English (US)
Title of host publication	APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1641-1648
Number of pages	8
ISBN (Electronic)	9781538611807
DOIs	https://doi.org/10.1109/APEC.2018.8341237
State	Published - Apr 18 2018
Externally published	Yes
Event	33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States Duration: Mar 4 2018 → Mar 8 2018

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume	2018-March

Conference

Conference	33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Country/Territory	United States
City	San Antonio
Period	03/4/18 → 03/8/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

Keywords

Medium-voltage drives
Modular multilevel converter (MMC)
Nine-arm MMC
Quasi two-level PWM
Six-phase machines
Sub-module (SM) capacitor voltage ripple

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/APEC.2018.8341237

Cite this

Diab, M. S., Adam, G. P., Williams, B. W., Massoud, A. M., & Ahmed, S. (2018). Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives. In APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition (pp. 1641-1648). (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2018-March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2018.8341237

Diab, Mohamed S. ; Adam, Grain P. ; Williams, B. W. et al. / Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives. APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 1641-1648 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

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title = "Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives",

abstract = "This paper proposes a hybrid converter for medium-voltage six-phase machine drive systems that mixes the operation of a traditional two-level voltage-source inverter and the modular multilevel converter (MMC) to enable operation over a wide frequency range. Topologically, the proposed converter consists of nine arms resembling two sets of three-phase MMCs with three common arms, yielding a nine-arm MMC with a 25% reduction in the number of employed arms compared to a traditional dual three-phase MMC. The multilevel property of a standard MMC is emulated in the proposed converter, however on a two-level basis, resulting in a stepped two-level output voltage waveform. The proposed converter has a reduced footprint with advantages of small voltage steps, modular structure, and ease of scalability. Further, it is able to drive high-power six-phase machines within low operating frequencies at the rated torque. The operating principle of the converter is elaborated, and its modulation scheme is discussed. The features of the proposed converter are verified through simulations and experimentally.",

keywords = "Medium-voltage drives, Modular multilevel converter (MMC), Nine-arm MMC, Quasi two-level PWM, Six-phase machines, Sub-module (SM) capacitor voltage ripple",

author = "Diab, {Mohamed S.} and Adam, {Grain P.} and Williams, {B. W.} and Massoud, {Ahmed M.} and Shehab Ahmed",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 ; Conference date: 04-03-2018 Through 08-03-2018",

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Diab, MS, Adam, GP, Williams, BW, Massoud, AM & Ahmed, S 2018, Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives. in APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, vol. 2018-March, Institute of Electrical and Electronics Engineers Inc., pp. 1641-1648, 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018, San Antonio, United States, 03/4/18. https://doi.org/10.1109/APEC.2018.8341237

Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives. / Diab, Mohamed S.; Adam, Grain P.; Williams, B. W. et al.
APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1641-1648 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2018-March).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Massoud, Ahmed M.

AU - Ahmed, Shehab

PY - 2018/4/18

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N2 - This paper proposes a hybrid converter for medium-voltage six-phase machine drive systems that mixes the operation of a traditional two-level voltage-source inverter and the modular multilevel converter (MMC) to enable operation over a wide frequency range. Topologically, the proposed converter consists of nine arms resembling two sets of three-phase MMCs with three common arms, yielding a nine-arm MMC with a 25% reduction in the number of employed arms compared to a traditional dual three-phase MMC. The multilevel property of a standard MMC is emulated in the proposed converter, however on a two-level basis, resulting in a stepped two-level output voltage waveform. The proposed converter has a reduced footprint with advantages of small voltage steps, modular structure, and ease of scalability. Further, it is able to drive high-power six-phase machines within low operating frequencies at the rated torque. The operating principle of the converter is elaborated, and its modulation scheme is discussed. The features of the proposed converter are verified through simulations and experimentally.

AB - This paper proposes a hybrid converter for medium-voltage six-phase machine drive systems that mixes the operation of a traditional two-level voltage-source inverter and the modular multilevel converter (MMC) to enable operation over a wide frequency range. Topologically, the proposed converter consists of nine arms resembling two sets of three-phase MMCs with three common arms, yielding a nine-arm MMC with a 25% reduction in the number of employed arms compared to a traditional dual three-phase MMC. The multilevel property of a standard MMC is emulated in the proposed converter, however on a two-level basis, resulting in a stepped two-level output voltage waveform. The proposed converter has a reduced footprint with advantages of small voltage steps, modular structure, and ease of scalability. Further, it is able to drive high-power six-phase machines within low operating frequencies at the rated torque. The operating principle of the converter is elaborated, and its modulation scheme is discussed. The features of the proposed converter are verified through simulations and experimentally.

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KW - Sub-module (SM) capacitor voltage ripple

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PB - Institute of Electrical and Electronics Engineers Inc.

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Y2 - 4 March 2018 through 8 March 2018

ER -

Diab MS, Adam GP, Williams BW, Massoud AM, Ahmed S. Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives. In APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc. 2018. p. 1641-1648. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC.2018.8341237

Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this