Electronics Fundamentals/Electromagnetic Devices/Transformer

Transformer

A transformer is an electronic component that has the capability to increase, decrease or buffer voltage

Construction

Transformer is constructed from two coils wounded on two sides of a square

$\frac{V_o}{V_i}=\frac{N_2}{N_1}$

Operation

From above,

$V_o=V_i\frac{N_2}{N_1}$

Step Up Voltage

$V_o>V_i$ when $N_2>N_1$

Step Down Voltage

$V_o<V_i$ when $N_2<N_1$

Buffer

$V_o=V_i$ when $N_2=N_1$

Reference

• Transformer