Analysis and Design of LCCL Load Matching Circuit for High-Frequency Induction Heating Series Resonant Inverter

摘要

An LCCL load matching electrostatic coupling approach for high-frequency induction heating series resonant inverters (SRI) is proposed. The new method has a high efficiency by replacing the commonly used heavy and expensive output transformer in high-frequency induction heating SRI. Secondly, this approach could be used in low load quality factor situations. In this paper, the LCCL resonant circuit topology and electrical characteristics are analyzed in detail. The design scheme for LCCL load matching method is then presented. The LCCL voltage-fed high-frequency single phase full-bridge power supply prototype is designed and tested using an FPGA as the main controller. The experimental results validate the proposed approach.