On the Main Flux of an Induction Machine Asymmetrical Supplied

Operating an induction machine on an asymmetrical voltage system leads to an asymmetrical system of quantities (voltages, currents, fluxes). The rotating magnetic field is no longer circular but elliptical. The dissymmetry factor of the main flux depends on the dissymmetry factor of the supply voltage and also on the operating conditions. In practical applications there is a strong influence of both operating condition and rotor speed on the asymmetric regime of the main flux. The object of this paper is to study to what extent the asymmetry of the main flux depends on the operating conditions. This matter is studied by theoretical evaluation, confirmed and completed by simulation results.