Variable Inductor
Purpose
Variable inductor.
Library
Nonlinear
Description
This component models a variable inductor. The inductance is determined by the
continuous signal fed into the input of the component. The voltage across a variable
inductance is determined by the equation

Therefore, the control signal is a vector twice as wide as the width of the component.
It contains both the momentary inductance values and their derivatives with respect
to time:
. It is the responsibility of the user to
provide the correct derivatives.
Note
- The variable inductor is based on a voltage controlled current source. It
may therefore not be connected in series with other current sources or
inductors.
- The control signal for the momentary inductance values must be
continuous. Discontinuous changes will produce non-physical results.
Parameters and Dialog Box
-
Width
- The width of the electrical ports resp. the number of variable inductors
represented by the component.
-
Initial current
- The initial current through the inductor at simulation start, in
amperes (A). This parameter may either be a scalar or a vector with the width
of the component. The direction of a positive initial current is indicated by a
small arrow in the component symbol. The default of the initial current is 0.
Probe Signals
-
Inductor current
- The current flowing through the inductor, in A. The direction
of a positive current corresponds to the small arrow at one of the terminals.