Design and Study of Flexible LCCL Series Resonant Inverter for Induction Heating

摘要

A flexible LCCL load matching electrostatic coupling approach for SRI (series resonant inverters) of induction heating is proposed. It enables more flexible and convenient load matching through the multiple configurations of the matching series capacitors in the LCCL circuit. The LCCL resonant circuit topology and electrical characteristics are analyzed. The LCCL multiple capacitor configurations principle is given. The single phase full-bridge SRI for induction heating power supply prototype and SRI with output transformer are designed and tested by using an FPGA as the main controller. The experimental results validate the proposed approach and confirmed that the proposed approach can reach higher efficiency in contrast with the SRI with output transformer.