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Experimental Transient Behaviour Characterisation of Induction Motor fed by Variable Frequency Drives for Pump Applications
KTH, School of Electrical Engineering (EES), Electrical Energy Conversion.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Experimentell analys av transienter i omriktarmatad asynkronmotor för pumpar (Swedish)
Abstract [en]

The use of variable frequency drives in centrifugal pump applications

has raised the question of how to select a drive. Clogging obstacles in

waste water applications create unknown transient loads for the pump

system. A sudden load increase occurrence can clog the pump if the

drive cannot supply enough current to reach the motor’s torque demand.

In order to select a suitable drive, an empirical approach has been implemented,

investigating three different drives. Results have shown that

selecting a drive with the highest possible overload capabilities, even

if for a short time is most suitable. Operation in vector speed control

gives the most reliable operation if an automatic parameter tuning is

performed by the drive.

Abstract [sv]

Användningen av frekvensomriktare i centrifugalpumpar har väckt

fr

ågan om hur en omriktare skall väljas. Igensättande objekt i avloppsvatten

kan ge upphov till transienta laster i pumpsystemen. En oförutsedd

lastökning kan sätta igen pumpen om frekvensomriktaren inte kan

förse motorn tillräckligt med ström för att möta momentbehovet. För

att välja en lämplig omriktare har ett empiriskt tillvägag

ångssätt valts

i en undersökning av tre olika omriktare. Resultat har visat att det är

lämpligast att välja en omriktare med högst överbelastningskapacitet,

även om under en kort tid. Vektor hastighetskontroll är metoden som

ger stabil körning om omriktaren f

ått automatiskt ställa in motorparametrarna.

Place, publisher, year, edition, pages
2014. , 106 p.
Series
EES Examensarbete / Master Thesis, XR-EE-E2C 2014:008
Keyword [en]
Variable Frequency Drive, Centrifugal Pump, Induction Motor, Volts-per-Hertz Control, Speed Control, Overdimensioning
Keyword [sv]
Frekvensomriktare, centrifugalpump, asynkronmotor, skalärkontroll, hastighetskontroll, överdimensionering
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-157319OAI: oai:DiVA.org:kth-157319DiVA: diva2:769611
External cooperation
Xylem
Educational program
Master of Science in Engineering - Electrical Engineering; Master of Science - Electric Power Engineering
Examiners
Available from: 2014-12-08 Created: 2014-12-08 Last updated: 2014-12-08Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • en-US
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  • nn-NO
  • nn-NB
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More languages
Output format
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