Principle and Analysis of Operation of LCLLC Resonant Boost Converter

Main Circuit Topology & Equivalent Model of the LCLLC Circuit

The study utilizes an LCLC resonant tank to step up the AC waveform voltage with the goal of increasing the effective voltage for tumor treatment. To achieve further voltage multiplication, the LCLC resonant tank is modified by adding a 1:1 transformer, referred to as LCLLC in this study. Fig. 1a illustrates the proposed DC/AC inverter with the LCLLC resonant boost tank, which primarily consists of a 3.7 V DC battery power supply (Vin ), H-bridge switches (S1 to S4 ) and the energy storage capacitors Cs . The voltage,Vs , from the H-bridge passes through the LCLLC resonant tank to achieve high voltage gain.