Mutual Inductor
Purpose
Ideal mutual inductor
Library
Electrical / Passive Components
Description
This component provides two or more coupled inductors. Electrically, it is equivalent with a vectorized Inductor. In contrast to the vectorized Inductor, this component displays the individual inductors in the schematic as separate windings.
In the symbol of the mutual inductor, the positive terminal of winding 1 is marked with a little circle. The positive terminals of all other windings are marked with dots.
Note An inductor may not be connected in series with a current source. Doing so would create a dependency between an input variable (the source current) and a state variable (the inductor current) in the underlying state-space equations.
Parameters
- Number of windings
- The number of ideal inductors represented by the component.
- Inductance
- The inductance in henries (H). All finite positive and negative values
are accepted, including 0.
If the parameter is a scalar or a vector no coupling exists between the windings. In order to model a magnetic coupling between the windings a square matrix must be entered. The size
of the matrix corresponds to the number of windings.
is the self inductance of the internal inductor and
the mutual inductance:
The inductance matrix must be invertible, i.e. it may not be singular. A singular inductance matrix results for example when two or more inductors are ideally coupled. To model this, use an inductor in parallel with an Ideal Transformer.
The relationship between the coupling factor
and the mutual inductance
is
- Initial current
- The initial current in the windings at simulation start, in amperes (A). This parameter may either be a scalar or a vector corresponding to the number of windings. The direction of the initial current inside the component is from the positive to the negative terminal. The default of the initial current is 0.
Probe Signals
- Winding i current
- The current flowing through winding i, in amperes (A).
- Winding i voltage
- The voltage measured across winding i, in volts (V).