Simulation and Laboratory Model of Induction Heating in COMSOL Multiphysics

the phenomenon of induction heating is a very energy efficient way of heating bodies. However, it depends on various factors, making the problem highly nonlinear. Mathematical analysis of this problem is in most cases very complex and is reduced to simple cases. Further knowledge of induction heating systems is gained in production environments, but these trial and error procedures are long and expensive. Another approach to reduce the above disadvantages is numerical models of the induction heating problem. This paper deals with a simulation model of the induction heating problem. A simulation model of the induction heating system in the COMSOL Multiphysics program is created. Equivalent inductance and equivalent resistance of the induction coil and workpiece connection during the heating and temperature change process are obtained for different parameters of the alternating current flowing through the induction coil. The model includes nonlinear electromagnetic and thermal properties of the workpiece material. The simulation model provides basic information about the processes taking place in the heated material. To verify the simulation model, experimental measurements are performed using the designed and implemented power converter.