Improving output voltage of the three phase six-switch inverters

Abstract

In this paper, a simple method for selecting the best conductive angle based on power factor of load in three phase six-switch inverters is proposed. Conductive angle from 120° to 180°, and power factor from 0 to 1 are changed for lead and lag loads. Then RMS and THD values of the output voltage are studied. Simulation results show that a special conductive angle for each specific power factor has to be used to improve the mentioned indices and applying conventional conductive angles 120o, 180° and 150° in some power factors increases THD and decreases RMS of output voltage. © 2011 Universitas Ahmad Dahlan.