Created by Created July 17, 2012 Last modified May 05, 2013 Tags

### Summary

The CL transformer symbol can be confusing. The series of circuits:
Understanding the CL transformer symbol 01
to
Understanding the CL transformer symbol 03

attempt to provide help on understanding how to use and understand the transformer symbol in CL.

### Description

Using the CL transformer symbol and model to make a 1:2 turns ratio transformer with a 1H primary inductance. To do this in the CL symbol we must set N = 0.5.

Because it is not an ideal DC transformer, the effect of the primary inductance must be taken into account.

The frequency is set to 1 Rad/s so that the reactance of the primary inductance equals 1 Ohm, i.e. the primary voltage has been attenuated to 1/sqrt(2) of the 1V pk-pk input signal.

Because the transformer is a 1:2 step up:

V(sec) = 2*V(pri)

To set the transformer parameters, either:

Double-click on the symbol

or

Right-click > Edit parameters

and then enter the parameters in the relevant text boxes.

Note that:

i) the secondary is open circuit. ii) A 1:M turns ratio transformer with a primary inductance of Lpri will have a secondary inductance of Lpri*M^2

Simulate > Time Domain > Run Time-Domain SImulation

https://www.circuitlab.com/circuit/zjq2qt/understanding-the-cl-transformer-symbol-02/

https://www.circuitlab.com/circuit/857879/understanding-the-cl-transformer-symbol-03/