Autotransformer

class pmrf.models.components.ideal.Autotransformer(N: Any = 1.0, *, name: str | None = None, metadata: Any = None)

Bases: Model

(experimental) An ideal, lossless, frequency-independent 3-port 1:N autotransformer.

A single tapped winding runs from port 1 to port 3, with the tap brought out at port 2, so that \(V_1 - V_3 = N (V_2 - V_3)\). Port 1 therefore sees the full winding and port 2 the tapped section, making N the step-up ratio from the tap to the full winding. Equivalently, this is a 1:(N-1) Transformer with its secondary connected in series with its primary.

Being a single winding, this component provides no isolation: the three terminal currents sum to zero.

The S-parameters are constant across all frequencies and are independent of the characteristic impedance.

Parameters:

N (Param) – The turns ratio (1:N) from the tapped section to the full winding. Defaults to 1.0, for which the tap coincides with port 1.

N: Param = 1.0

N

Type:

The turns ratio 1