Wireless Charging Resonant Converter Topology Study Based On Analytical Design Computation

This paper proposes the method to analyze the performance of wireless charging DC/DC resonant converters in various load conditions including the magnetic coupling effect. The equations for design performance analytical calculations are presented for series-series (SS) and series-parallel (SP) wireless charging DC/DC resonant converters. The equations can be applied in switching frequency sensitivity analysis at different magnetic strength and load resistance conditions to compare the performance of the resonant circuit topologies. The analytical calculation results can be used to size the voltage, current, and power rating of wireless charging resonant circuit components. The accuracy of the analytical calculation is validated by duty cycle control of wireless charging resonant converters in PLECS circuit simulation environment. Experimental results are obtained to support the conclusion drawn from the analytical solutions. The proposed method can be applied to study other wireless charging resonant converter topologies.