Variable Resistor with Variable Inductor
Purpose
Controlled resistance in series with controlled inductance
Library
Electrical / Passive Components
Description
This component models a variable resistor with a variable inductor connected in
series. The resistance and inductance are determined by the signals fed into the
inputs of the component. The voltage across this component is determined by the
equation

The control signal for the inductor must provide the values of both
and
in
the following form:
. It is the responsibility of the
user to provide the appropriate signals for a particular purpose. For detailed
information see the Variable Inductor.
If the component has multiple phases you can choose to include the inductive
coupling of the phases. In this case the control signal vector must contain the
elements of the inductivity matrix (row by row) and their derivatives with respect to
time. The control signal thus has a width of
,
being the number of phases.
Note
- The momentary inductance may not be set to zero. In case of coupled
inductors, the inductivity matrix may not be singular.
- The control signal for the momentary inductance values must be
continuous. Discontinuous changes will produce non-physical results.
Parameters
-
Inductive coupling
- Specifies whether the phases should be coupled inductively.
This parameter determines how the elements of the control signal are
interpreted. The default is off.
-
Initial current
- The initial current through the component at simulation start, in
amperes (A). This parameter may either be a scalar or a vector corresponding to
the implicit 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 amperes (A). The
direction of a positive current is indicated with a small arrow in the component
symbol.