Optimum supply for an inverter-fed cage induction motor at different load conditions

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Faculty of Electronics, Communications and Automation | A4 Artikkeli konferenssijulkaisussa
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2008

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Department of Electrical Engineering
Sähkötekniikan laitos

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Language

en

Pages

7

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Proceedings of the Nordic Workshop on Power and Industrial Electronics (NORPIE/2008)

Abstract

The effects of power supply on the energy efficiency of a form-wound cage induction motor are studied when the motor operates under light loads. The cage induction motor is modelled with the space and time discretized finite-element analysis. The resistive losses are taken into account accurately by modelling eddy currents in the form-wound multi-conductor stator winding and the rotor cage. The core losses are considered with conventional empirical equations. A pulse-width-modulated (PWM) voltage is used to supply the motor. The fundamental harmonic (FH) terminal voltage is decreased from its rated value and the slip is adjusted to achieve a particular load condition. The variation of the total electromagnetic as well as the stator resistive losses are analyzed to find the optimum supply.

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Keywords

optimum supply, finite-element analysis, PWM supply, electromagnetic losses, cage induction motor

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https://urn.fi/urn:nbn:fi:tkk-011711

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[comp] Sähkötekniikan korkeakoulu / ELEC