Calculation of Inductance and Resistance of a Coil

If you forgot to assign the Matrix parameter before the simulation, you can also calculate inductance and resistance after the simulation.

To calculate the inductance of a coil in the post-processing phase:

1) Go to Maxwell 3D > Results > Solution Data. On the convergence tab, note the TotalEnergy (J) of the last pass and calculate the inductance with the formula L=4*TotalEnergy/I_peak^2, where I_peak is the peak current of your coil.

OR

2) In the fields calculator, integrate the “energy” over the volume AllObjects to get the TotalEnergy and calculate the inductance with the abovementioned formula.

To calculate the resistance of a coil in the post-processing phase:

In the fields calculator, integrate the ohmic loss over the volume of your coil to get P_ohmic and calculate the resistance with the formula R=2*P_ohmic/I_peak^2.

Details about the formulas can be found in Maxwell Help: Maxwell 2D Technical Notes > Eddy Current Field Simulation > Impedance Matrix > Computing an Impedance Matrix > Matrix Resistance/Inductance.