How Electrical Power is Generated by an AC Generator
Learn how AC generators produce electricity, their efficiency factors, types, and applications in power systems.
How Electrical Power is Generated by an AC Generator
An AC (alternating current) generator, also known as an alternator, is a device that converts mechanical energy into electrical energy. This process is based on Faraday's Law of Electromagnetic Induction , which states that a voltage (EMF) is induced in a conductor when it experiences a changing magnetic field.
The fundamental principle behind AC generation is that when a coil rotates in a magnetic field, an alternating voltage is induced due to the continuous change in magnetic flux linkage. Basic Working Principle An AC generator consists of the following key components: Stator : The stationary part of the generator containing the armature windings where EMF is induced. Rotor : The rotating component that produces a magnetic field, typically using electromagnets. Slip Rings & Brushes : Used in synchronous generators to provide a continuous connection between the rotating and stationary parts. Prime Mover : A mechanical device (like a turbine or an engine) that rotates the rotor. When th…
About the author
Prasun Barua is a graduate engineer in Electrical and Electronic Engineering with a passion for simplifying complex technical concepts for learners and professionals alike. He has authored numerous highly regarded books covering a wide range of elec…
