alternator

ALTERNATORS By Mr.Parthasarathy.D Mr.Logesh Kumar

Agenda • • • • • • •

Intro to Alternator Needs Applications of Alternator Principal of Operation Construction Difference b/w Alternator and Dynamo Queries

Alternator - Intro • An alternator is an electromechanical device that converts mechanical energy to electrical energy in the form of alternating current. • In Simple, alternator is a AC Generator • Alternators are used in modern automobiles to charge the battery and to power the electrical system when its engine is running.

Application

Construction • Stator – Stator Core – Stator Windings – Brush Assembly

• Rotor – – – – –

Shaft Rotor Core Rotor Windings Slip Rings Pulley

• Yoke (or) Outer Cover

Electrical Equivalent

Principle of Operation • Works under the Principle of Faraday’s Law of electromagnetic induction. “ Whenever a conductor cuts a time varying magnetic flux, an EMF will be induced on that conductor. ”

Difference • • • • • •

DC Generator Requires more maintenance Size will be Large More Weight DC Output. Has Commutator Cost is more

• • • • • •

Alternator Requires less maintenance Size will be Less Large Less Weight AC Output Has Slip-rings Cost is Less

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Queries