Definition: The transformation ratio refers to the voltage ratio or current ratio. It is a device that transforms voltage or current, and the voltage or current ratio between the primary winding and the secondary winding. In the transformer, the ratio of the primary side electromotive force E1 to the secondary side E2 is called the transformation ratio of the transformer, which is represented by k, that is, k=E1/E2.
The induced potential in the primary winding of the transformer and the secondary winding of the transformer is proportional to the number of turns of the winding.
The ratio of the input voltage of the primary winding to the output voltage of the secondary winding is equal to their turns ratio, and the ratio K is called the ratio coefficient