Time Domain Analysis of a Three-Phase Ring Inverter with Reactive Load

The operation of a three-phase ring inverter with resistive and reactive loads has been analyzed here directly in time domain. The initial conditions on all the six condensers have been taken into account. The instantaneous output voltage and the harmonic content of the output have been obtained. In an earlier paper the author has presented a frequency domain analysis of such an inverter. The general method of writing circuit equations in frequency domain as well as directly in time domain presented in these two papers can in fact be applied to the study of the recurrent transients of many complex switching circuits. Experimental results reported in the earlier paper by the same authors are also presented here for comparison with the predicted results.