Radiation heat measurement model for temperature estimation in induction heating appliances

Domestic induction heating system employ the output power as control variable. The users select the desired power level among a set of possible values. The advantage of this strategy is related to the control of the associated power electronics. However, temperature control is preferred for cooking applications but it increases the complexity of the system due to the difficulties associated with the temperature estimation of the cookware. Temperature can be measured by means of contact or non-contact technique. This application demands non-contact temperature measurement due to the cooking surface, generally made of glass-ceramic, separates the cookware to the induction heating system placed bellow. Among others, temperature estimation based on radiation detectors, for instance, thermopiles, constitutes one of the most promising methods due to the immediate determination of the measure, but, the optimization of this method required a complex procedure. The aim of this paper is to provide the numerical model of this kind of the system suitable to be used for design purposes. The simulation results have been compared with analytical and experimental measurements in order to verify the correctness of the numerical model.