How Does a Transformer Work?

How Does a Transformer Work?

Transformers are one of the most important devices in electrical power systems. They help transfer electrical energy efficiently by increasing or decreasing voltage levels without changing the frequency.

Key Concepts:

Primary Coil & Secondary Coil

Magnetic Flux in Iron Core

Step-Up Transformer

Step-Down Transformer

Turns Ratio Principle

AC Input to AC Output

Step-Up Transformer → Increases Voltage

Step-Down Transformer → Decreases Voltage

Basic Transformer Formula:

Vp / Vs = Np / Ns

Where:

• Vp = Primary Voltage

• Vs = Secondary Voltage

• Np = Primary Turns

• Ns = Secondary Turns

Did You Know?

A transformer works only with AC because a changing magnetic field is required to induce voltage in the secondary winding.

Question for Engineers:

Why can’t a conventional transformer operate on pure DC supply?

Share your answer in the comments!