Fourteenth class, The Transformers

At the beginning of the class we have started with some refreshment of the former lesson, the transmission lines, and we have done some examples in order to cement our knowledge about the topic. 

While carrying out that task we have encountered with the problem of what happens when we don't have a resistance that equals the impedance value of our line. It has been then when we have started talking about transformers, a device which we have made a description in our very first handing. In this class, we have focused more in the ideal transformers, as usual, thinking first in the ideal devices is a very good way to get to know the basic functions and all that stuff. 

So, basically, a transformer is a 4-pole device that alters the value of the elements on one side while 'seeing' them from the other side. We have learned that they have something called the transformation relation n, a parameter which leads the change of value of the elements of the circuit. For instance, if we have a resistance of value R at the secondary, the value seen from the primary is n^2*R. We have something similar with the condenser and the inductor. 

As said before, this is just an ideal model, at the next class we will get to know the real model of a transformer!