Analysis and Design of the Resonant Current of the LCLC Resonant Converters with Consideration of Zero-Voltage Switching and Zero-current Switching

The LCLC resonant converters are widely used in the Electronic Power Conditioner (EPC) in a Travelling-wave Tube Amplifier (TWTA) due to the advantage of Zero-Voltage-Switching (ZVS) and Zero-Current-Switching (ZCS). However, in the physical circuit, problems such as non-Zero-Current-Switching and reverse resonant current appear and the efficiency decreases. Based on the working principles of the LCLC resonant converters, this paper presents the method to remove the reverse resonant current and the non-zero switching. Furthermore, an empirical data is given to guide the design of the converter. Finally, the analysis is validated by the simulations and experimental results.