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mahmoud A. AL-AHMAR
ahmed M. HASSAN


In this paper analytical solutions of the currents when a three-phase, six-step voltage-source inverter (VSI) is
feeding an induction motor (IM), are presented. Explicit analytical expressions of the steady-state current of the motor
and of the input current of the inverter and of its switching elements are derived instead of using numerical solution
methods. To check the validity of the presented analytical solutions, the results obtained of the motor currents and of the
currents of the switching elements of the inverter were compared with previously published results, and the two sets of
results were found to be identical.

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[1] Jung, Sungho and Ha, Jung-Ik, Low Voltage Modulation Method in Six Step Operation of Three Phase Inverter,, 9th International Conference on Power Electronics –ECCE Asia June 1-5, 2015/63Conversion Center, Seoul, Korea, p.605-610.
[2] Four, R. De., and Wadi, T., Natural Space Vector Modulation in Six-Step Voltage Source Inverters, International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 3, Issue 7, July 2014, p. 10409-10415.
[3] Wang, T. , Fang, F. , Wu, X. and Jiang, X., Novel Filter for Stator Harmonic Currents Reduction in Six-Step Converter Fed Multiphase Induction Motor Drives, IEEE Transactions On Power Electronics, Vol. 28,No. 1, January 2013, p. 498- 506.