Problem Description: Coil-and-Core Induction Heating Case

This tutorial demonstrates a co-simulation of the induction heating process using a cylindrical steel core and copper coils, as shown below. The initial temperature for the core and coils is 300K, and the expected steady state temperature is several hundred degrees hotter.

Figure 1: Induction coils with resulting core temperature shown

Induction coils with resulting core temperature shown

The co-simulation proceeds as follows:

  • Maxwell simulates the electromagnetic coupling between the coils and core and provides losses to Mechanical.

  • Mechanical then executes the thermal simulation in the core and sends the calculated temperatures back to Maxwell.

  • Maxwell updates its temperature-dependent material properties, and the co-simulation proceeds until the core's temperature approaches its steady-state value.

The Maxwell simulation includes an AC power supply that generates an excitation of 150 A at a frequency of 1 kHz. The adaptive passes used to generate the initial mesh utilize estimated temperatures of 500K and 600K for the core and coils, respectively.