Coupling thermal with electromagnetic fields takes into account the effect of ohmic, power and iron losses over time.

The Static Thermal 2D solver or the Transient Thermal 2D solver can be coupled to any of the following MagNet solvers:

The bi-directional link and the temperature dependent material properties involved in the coupled thermal-electromagnetic solvers ensures that the losses and temperature are updated at every step of the iterative solution process.

Enable and Disable Option

Depending on the type of analysis, it may be sometimes necessary to ignore a feature, which is essential in the magnetic or thermal solution, but not essential in the other. In other words, modeling a feature in one aspect of physics may be important, while in some other aspects, unnecessary. The enable/disable options were added to allow users to optionally enable or disable any component during the analysis.

Example: In induction heating systems, the modeling of the coils, the air, and the component that is being heated, is necessary during the magnetics analysis, only the heated component is required during the thermal analysis.

Coupled static thermal solutions solver controls:

  • Specify which problem (magnetic or thermal) should be solved first
  • Maximum number of iterations
  • Convergence tolerance for the coupled solutions

Coupled transient thermal solutions solver controls allow for specifying the number of times to solve the electromagnetic problem:

  • Solve at every step of the thermal transient
  • Solve at the beginning
  • Solve at every user specified interval

Option to use the same or different meshes in thermal and magnetic solutions

The mesh adaption in ThermNet works independently of MagNet since their requirements are not necessarily identical. The convergence tolerance is set on the change of an energy related global quantity.

Transient-Transient Time Steps

When coupling a transient-transient simulation, there must be at least one order of magnitude difference between the time steps for MagNet and ThermNet.

If the time step values are comparable, MultiNet is required to properly handle the coupling.