A Novel Domestic SE-IH With High Induction Efficiency and Compatibility of Nonferromagnetic Vessels

In this article, an autotransformer coil for domestic IH adopting single-ended resonant inverter (SE-IH) is proposed. The proposed SE-IH can simultaneously meet the impedance requirements of ZVS and high induction efficiency at a higher frequency, resulting in a higher efficiency, increased output power and improved compatibility with nonferromagnetic vessels. Based on the proposed accurate wide-frequency impedance model of the coil-vessel system, the induction efficiency of the proposed SE-IH is analyzed, as well as the impedance condition for ZVS. The selection of the operating frequency and the design of the proposed coil for induction efficiency optimization are then given. Finally, a prototype of the proposed domestic SE-IH is fabricated, achieving 2269-W output power with 99.26% induction efficiency for GB45 steel vessel and 932-W output power with 90.46% induction efficiency for aluminum vessel.

Automated summary

This article introduces a design of autotransformer coil for domestic induction heating, utilizing a single-ended resonant inverter. The proposed system achieves higher efficiency, increased output power and improved compatibility with nonferromagnetic vessels.