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Modular multilevel converter AC motor drives with constant torque from zero to nominal speed

Antonopoulos, Antonios (author)
KTH,Elektrisk energiomvandling,High Power Electronics
Ängquist, Lennart (author)
KTH,Elektrisk energiomvandling,High Power Electronics
Norrga, Staffan, 1968- (author)
KTH,Elektrisk energiomvandling,High Power Electronics
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Ilves, Kalle (author)
KTH,Elektrisk energiomvandling
Harnefors, Lennart, 1968- (author)
KTH,Elektrisk energiomvandling,High Power Electronics
Nee, Hans-Peter (author)
KTH,Elektrisk energiomvandling
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 (creator_code:org_t)
2014
2014
English.
In: IEEE transactions on industry applications. - 0093-9994 .- 1939-9367. ; 50:3, s. 1982-1993
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • 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.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

constant torque
medium-power variable-speed drives
Modular multilevel converters
SRA - Energy
SRA - Energi

Publication and Content Type

ref (subject category)
art (subject category)

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