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Variable Resistor with Constant Inductor

Purpose

Controlled resistance in series with constant inductance

Library

Electrical / Passive Components

Description

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This component models a variable resistor with a constant inductor connected in series. The resistance is determined by the signal fed into the input of the component.


Note  In this component the resistor is implemented as a current-dependent voltage source. Without the series inductor, which fixes the momentary current, this would result in an algebraic loop. Therefore, the inductance may not be set to zero.

Parameters

Inductance
The inductance in henries (H). All finite positive and negative values are accepted, excluding 0. The default is 1e-3.

In a vectorized component, all internal inductors have the same inductance if the parameter is a scalar. To specify the inductances individually use a vector [L1 L2 ...Ln]  . The length n   of the vector determines the width of the component.

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 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 Signal

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.