An Induction Heating System Analysis Method based on Operating Conditions

In this paper, we propose an induction heating system analysis method under operating conditions. In the induction heating system, the current of the coil generates an eddy current on the load surface, and heat is generated by the eddy current. At this time, a high level of current is applied depending on the operating conditions of the induction heating system. When the equivalent resistance and inductance of the coil and load are measured and applied to the time domain simulation in the stop condition, the output voltage and current show different results from the measured results. Therefore, we propose a simulation method that calculates the equivalent resistance and inductance in the operating conditions of the induction heating system, and verify the proposed method by measurements. When the proposed method is applied to the simulation, the errors of the output voltage and output current are reduced up to 90% compared to the conventional method when the time domain simulation results are compared with the measurements.