Electric generators are,
actually the lifesavers. They are backup power sources that convert fuel supply
usually propane, diesel or gasoline, into electrical energy. They are the
primary sources of electrical supply during power outages. This energy is used
in an external circuit.
Direct
current generators
The dynamo was the first
electrical generator capable of delivering power for industry. The dynamo uses
electromagnetic induction to convert mechanical rotation into direct current
through the use of a commutator.
Homopolar
generator
A homopolar generator is
a DC electrical generator comprising an electrically conductive disc or
cylinder rotating in a plane perpendicular to a uniform static magnetic field.
A potential difference is created between the center of the disc and the rim
(or ends of the cylinder), the electrical polarity depending on the direction
of rotation and the orientation of the field.
MHD
generator
A magnetohydrodynamic
generator directly extracts electric power from moving hot gases through a
magnetic field, without the use of rotating electromagnetic machinery. MHD
generators were originally developed because the output of a plasma MHD
generator is a flame, well able to heat the boilers of a steam power plant.
Alternating
current generators
Alternating current
generating systems were known in simple forms from Michael Faraday’s original
discovery of the magnetic induction of electric current. Faraday himself built
an early alternator. His machine was a “rotating rectangle”, whose operation
was heteropolar – each active conductor passed successively through regions
where the magnetic field was in opposite directions.
There are three main
types of generators: portable, inverter and standby.
Portable generators:
Portable generators provide electricity by running a gas-powered engine. That
turns an onboard alternator to generate electrical power. A typical portable
generator contains the following primary components assembled together onto a
metal frame in a single unit:
1. Internal combustion
engine
2. Alternator
3. Starter
4. Fuel tank
5. Outlets
Inverter Generator: An
inverter generator uses an engine connected to an alternator to produce AC power.
It also uses a rectifier unlike other generators to convert the AC power into
DC power.
Standby Generator: A
standby generator comes on when the grid goes down. Within seconds of a power
outage, the standby generator automatically comes on and sends power to
appliances and light sockets in the home. The best choice is a standby
generator. With gas- or diesel-powered generators, there’s a lot of setups
after the power goes out and you’ll need to store extra fuel in case the power
is out for days rather than hours. Meanwhile, it's taking up valuable space in
the garage or backyard shed and posing a fire hazard.
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