Inductance Calculation

The inductance calculation in the magnetic analysis is as follows.

The obtainable outputs are listed in the table below.

Analysis Type	Condition	Self Inductance Mutual Inductance Coupling Coefficient
Static Analysis	---	Yes
Harmonic Analysis	Select [Inductance Calculation] on the Magnetic Analysis tab of the analysis condition.	Yes
Transient Analysis	Select [Inductance Calculation] on the Magnetic Analysis tab of the analysis condition.	Yes

There are apparent inductance and differential inductance.

Depending on ON/OFF of the external circuit coupling, calculation is performed as follows

If External Circuit Coupling is ON
Calculation is performed with FEM coils on the external circuit. External Circuit Conversion is taken into account.
If External Circuit Coupling is OFF
Calculation is performed with coils in the analysis model. External Circuit Conversion is not taken into account.

By using an external circuit, the serial inductance of multiple coils can be calculated.

The skin effect or induced current is not taken into account in the transient analysis.

It is taken into account in the harmonic analysis.

Rc: resistance of the inductor

Ri: resistance of iron loss, or sum of losses of induced current and hysteresis

L: inductance of the inductor

Impedance Z is calculated under the condition that the current is applied only to the inductor which is to be analyzed.
Therefore, if the model has two or more inductors that the currents are applied to,
Z is calculated with the ports of the inductors other than the analyzed one being open and only the induced currents going through those inductors.

With the bulk coil whose number of turns is set to 2 or larger and the induced current existing, R isn't calculated accurately.