Frequency domain model for analysis of paralleled, series-output-connected Mapham inverters

The Mapham resonant inverter is characterized as a two-port network driven by a selected periodic voltage. The two-port model is then used to model a pair of Mapham inverters connected in series and employing phasor voltage regulation. It is shown that the model is useful for predicting power output in paralleled inverter units, and for predicting harmonic current output of inverter pairs, using standard power flow techniques. Some sample results are compared to data obtained from testing hardware inverters. The model gave qualitatively acceptable results, accurately representing trends in inverter output with respect to the inverter clock signal but overestimating the sensitivity of the system to changes in clock signal. A good forecast of the circulating harmonic current was obtained, and the performance of the model filter was comparable to that of a real filter