The document compares generators and alternators, detailing their components, functions, and efficiencies. Generators convert mechanical energy into either AC or DC with lower efficiency and output, while alternators specifically convert mechanical energy to AC with higher efficiency and output. In applications, generators are used for large-scale electricity production, whereas alternators are mainly used in automobiles for battery charging.

1. GOVERNMENT ENGINEERING
COLLEGE, DAHOD
ELECTRICAL ENGINEERING DEPARTMENT
TOPIC NAME : DIFFERENCE BETWEEN GENRATOR AND
ALTERNATOR
PRESENTED BY : -
1) SONI PARTH
2) PATEL NIL

3.  Components of an Electric Generator
 The main components of an electric generator are given below
 The Frame – the structure
 An Engine – source of mechanical energy
 The Alternator – produces an electrical output from the mechanical input
 A Fuel System – to keep the generator operational
 A Voltage Regulator – to regulate the voltage output
 A Cooling System – to regulate heat levels that build up in the system
 A Lubrication System – for durable and smooth operations over a span
 An Exhaust System – to dispose of the waste exhaust gases produced in the process
 A Charger – to keep the battery of the generator charged
 Main Control – the control panel controlling generator interface

4. GENRATOR
 What is generator ?
 A generator is a mechanical device
which converts mechanical energy to
either AC or DC electrical energy.
 Output Current
 A generator can generate either
alternating or direct current.
 Energy Efficiency
 Generators are considered less
efficient.
ALTERNATOR
 What is Alternator ?
 An alternator is a device that converts
mechanical energy into AC electrical
energy.
 Output Current
 An alternator always induces an
alternating current.
 Energy Efficiency
 Alternators are very efficient.

6. GENRATOR
 Output
 Generators have a lower output when
compared with an alternator.
 Energy Conservation
 Generators use all the energy that is
produced and so, they conserve less
energy.
 Magnetic Field
 In case of a generator, the magnetic
field is stationary or fixed where the
armature winding spins.
ALTERNATOR
 Output
 Alternators have higher output than
generators.
 Energy Conservation
 Alternators use only the required
amount of energy and thus, it
conserves more energy.
 Magnetic Field
 The magnetic field is rotating inside
the stator of an alternator.

7. Cummins 1500 kW Standby Diesel Generator– 277/480 V

8. GENRATOR ALTERNATOR
 Armature Movement
 The armature of a generator is
rotating.
 Input Supply
 The generator takes input supply
from the rotor.
 RPM (Rotation Per Minute) Range
 Generators have a low range of RPM.
 Armature Movement
 The armature of an alternator is
stationary.
 Input Supply
 The alternator takes input supply
from the stator.
 RPM (Rotation Per Minute) Range
 Alternators have a wide range of
RPM.

10. GENRATOR ALTERNATOR
 Size
 Generators are larger and require
more space to fit in.
 Brush Efficiency
 The brushes of generators last lesser
when compared to an alternator.
 Charging of a Dead Battery
 A generator can be used for charging
a dead battery.
 Size
 Alternators are generally smaller in
size
 Brush Efficiency
 The brushes of alternators last
longer.
 Charging of a Dead Battery
 Alternators will never charge a dead
battery.

11. GENRATOR ALTERNATOR
 Uses
 Generators are widely used to
produce large-scale electricity.
 Uses
 Alternators are mainly used in the
automobile industry as a charging
system for the battery.
GENRATOR

12. ALTERNATOR