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Linear Transformer (2 Windings)

Purpose

Single-phase transformer with winding resistance and optional core loss

Library

Electrical / Transformers

Description

pict

This transformer models two coupled windings on the same core. The magnetization inductance Lm   and the core loss resistance Rm   are modeled as linear elements. Their values are referred to the primary side. A stiff solver is recommended if Rm   is not infinite.

The electrical circuit for this component is given below:

pict

In the transformer symbol, the primary side winding is marked with a little circle. The secondary side winding is marked with a dot.

Parameters

Leakage inductance
A two-element vector containing the leakage inductance of the primary side L1   and the secondary side L2  . The inductivity is given in henries (H).
Winding resistance
A two-element vector containing the resistance of the primary winding R1   and the secondary winding R2  , in ohms (_O_  ).
Winding ratio
The ratio n1∕n2    between the number of turns of the primary and secondary winding.
Magnetization inductance
The magnetization inductance Lm  , in henries (H). The value is referred to the primary side.
Core loss resistance
An equivalent resistance Rm   representing the iron losses in the transformer core. The value in ohms (_O_  ) is referred to the primary side.
Initial current
A two-element vector containing the initial currents on the primary side i1   and the secondary side i2  , in amperes (A). The currents are considered positive if flowing into the transformer at the marked terminals. The default is [0 0].