Cited by 297Multilevel Inverters and ConvertersHVDC Systems and Fault ProtectionSensorless Control of Electric Motors

Modular Multilevel Converter AC Motor Drives With Constant Torque From Zero to Nominal Speed

Antonopoulos, Antonios, Angquist, Lennart, Norrga, Staffan, Ilves, Kalle, Harnefors, Lennart, Nee, Hans-Peter·2014·IEEE Transactions on Industry Applications

Abstract

Modular multilevel converters are shown to have a great potential in the area of medium-voltage drives. Low-distortion output quantities combined with low average switching frequencies for the semiconductor devices create an ideal combination for very high-efficiency drives. However, the large number of devices and capacitors that have to conduct the fundamental-frequency current require more complex converter control techniques than its two-level counterpart. Special care needs to be taken for starting and operation at low speeds, where the low-frequency current may cause significant unbalance between the submodule capacitor voltages and disturb the output waveforms. In this paper, principles for converter operation with high torque in the whole speed range are investigated. Experimental results from a down-scaled 12-kVA prototype converter running a loaded motor at various speeds between standstill and the rated speed are also provided.

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Registry

Crossref · 10.1109/tia.2013.2286217

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29 of 29 references verified0 citation errors · 0 not checkable

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  • The MMC as a motor drive suffers large capacitor voltage ripple and reduced controllability at low speeds.

    “One of the early applications of the MMC was as a motor drive, as shown in Fig. 6(b). However, the large increment of capacitor voltage ripple and the reduced controllability at low speeds, slowing down the development of this application [66].”

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Authors
Antonopoulos, A., Angquist, L., Norrga, S., Ilves, K., Harnefors, L., & Nee, H.-P.
Affiliations
  • ABB (Sweden) (SE)
  • KTH Royal Institute of Technology (SE)
Venue
IEEE Transactions on Industry Applications
Published
2014-05
Volume
50
Issue
3
Pages
1982-1993
ISSN
  • 0093-9994 (ISSN-L)
  • 1939-9367
OpenAlex
W2145139832
Cited by
297
References
29
Citations by year
2026: 2 · 2025: 6 · 2024: 11 · 2023: 15 · 2022: 13 · 2021: 27 · 2020: 35 · 2019: 32 · 2018: 41 · 2017: 36 · 2016: 32 · 2015: 35 · 2014: 6 · 2013: 6
FWCI
15.80
Type
journal article
Language
en
Open access
closed
Locations
IEEE Transactions on Industry Applications (publishedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Multilevel Inverters and Converters
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › HVDC Systems and Fault Protection
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Sensorless Control of Electric Motors
Keywords
modular multilevel converter, AC motor drives, constant torque, zero-speed operation, low-speed operation, capacitor voltage balancing, converter control, medium voltage drives

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