Power Curve-Fitting Control Method with Temperature Compensation for All-Metal Induction Heating Systems

In this paper, a control strategy and implementation for all-metal domestic induction heating (IH) system that can heat any kind of metallic pots while considering the temperature variation of the working coil is proposed. Control algorithm using a power curve-fitting method (CFM) is presented to quickly respond to load parameter variations in IH. In addition, a control algorithm is established to compensate the power reference value by reflecting the increase in the working-coil temperature during the heating of the non-ferromagnetic pot. To evaluate the performance of the proposed the control algorithm strategy, experimental results based on a 3.2-kW all-metal IH cooktop are presented.