To see how to analyze the sinusoidal steady-state behavior of linear and ideal transformers. To discuss uses for linear and ideal transformers.
Nillson and Riedel, Sections 6.4, 9.10-11
A transformer is a device that transfers electrical energy from one circuit to another through a shared magnetic field. A changing current in the first circuit (the primary) creates a changing magnetic field; in turn, this magnetic field induces a changing voltage in the second circuit (the secondary). By adding a load to the secondary circuit, one can make current flow in the transformer, thus transferring energy from one circuit to the other.
In this discussion, the inductive winding attached to the source is called the primary winding and the winding attached to the load is called the secondary winding. We are also using the dot convention, which can be stated as:
The mutual inductance constant is defined as:
is the coefficient of coupling).
The two categories we will discuss in this class are linear and ideal transformers.