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- W342364120 abstract "This report presents the results obtained from measurements on two inductionmachines (IMs) fed by three different types of frequency converters; the focus hasbeen on determining the different loss components of the drive system and how thesevaries with the frequency at different operating points.The mechanical power output was measured with a torque transducer and fordetermining the electric power a six-channel power analyzer was used. The mainconclusion is that the method used gave good results; it managed to explain nearly allthe losses in the induction machine. The part of the losses not accounted for was 13%in the worst case, which can represet the stray losses. Furthermore, it was establishedhow the different loss components varied with frequency and load; it was found thatthe overall losses decreased with increasing frequency for all load situationsAn investigation of three field measurement methods was also preformed; the slipmethod, the current method and the air gap torque method were considered. The twofirst methods gave unsatisfying result. The air gap torque method gave a result veryclose to the measured output power. The estimated efficiency of the two methodsvaried with a maximum of 3.7% and this variation became less than 0.5% at loadsabove 0.5 p.u output power." @default.
- W342364120 created "2016-06-24" @default.
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- W342364120 date "2004-01-01" @default.
- W342364120 modified "2023-09-24" @default.
- W342364120 title "Measurement of loss components in two induction machines and three types of frequency converters" @default.
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