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Analytical modelling of an induction motor fed by a four‐switch PWM VSI

Jiri Klima (Department of Electrical Engineering and Automation, Technical Faculty of CZU in Prague, Prague, Czech Republic)

Abstract

This paper presents analytical and experimental results that quantify the performance of an induction motor fed by a space‐vector pulse width modulated four‐switch (B4) voltage source inverter. First, as voltage vectors in the inverter form unsymmetrical sequences, the discrete Fourier transform is used to express the voltage vectors in symmetrical form. Second, by using a mixed p‐z approach for every voltage vector sequence, we can derive a closed‐form solution, including steady‐state and transient components of the motor currents. From the motor currents, we can derive an analytical equation for the electromagnetic torque. Both the steady‐state and transient components of the motor currents are determined in a simple and lucid analytical form, which avoids involved matrix inversion as well as exponentiation. The theoretical considerations are verified on an experimental unit.

Keywords

Citation

Klima, J. (2004), "Analytical modelling of an induction motor fed by a four‐switch PWM VSI", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 23 No. 2, pp. 487-505. https://doi.org/10.1108/03321640410510695

Publisher

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Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited