Design and Implementation of a Class-E Self-Oscillating Inverter for Cost-Effective Induction Heating Systems

摘要

This paper proposes a novel topology for a class-E oscillator applied to induction heating for household appliances. The main features of the proposed topology are the high efficiency, low cost and low size, making it suitable for medium-high power applications where efficiency is a must. It only requires one active device and no logic control is needed. The power supply requirements as well as isolation between power and control are therefore avoided. This converter is intended for fixed output-power applications such as rice cookers or coffee machines. The proposed topology has been designed and tested for a domestic induction heating load. Experimental results as well as key waveforms for a 900-W prototype featuring 92% efficiency are included.