Moderate Constant Power Properties of Series Resonant Networks

This work reveals that series resonant networks (SRN) operating under CCM condition, can deliver approximately constant power under varying load condition without a frequency change or duty cycle control. The model developed in the study, delineates the relationship between characteristic impedance, the deviation of the excitation frequency from the resonant frequency, the load resistance and the output power for a given input voltage. As such, the model could be used to design a constant power SRN or a series resonant converter for a given application. Experimental and simulation results verify the analytical model developed in the study.