Most industrial and commercial
processes are dependent on electrical power. In the event of power
interruptions, the change-over from power supplied...
Among the replenish able source as
an alternative to fossil fuels, wind energy is also in equal race. The
power generation on the large scale using the wind...
Renewable energy can be used to
decrease global dependence on natural resources, and tidal power can be
the primary form of renewable power utilized. Built...
The majority of electrical drive
systems are three-phase systems. Recently some quasi-four-phase systems
employing neutral leg also have been used...
The performance of Stirling engines
meets the demands of the efficient use of energy and environmental
security and therefore they are the subject of much...
Domestic refrigerators annually
consume approximately 17,500 metric tons of traditional refrigerants
such as Chlorofluorocarbon (CFC) and Hydroflourocarbon...
Geothermal power plants can be
divided into two main groups, steam cycles and binary cycles. Typically
the steam cycles are used at higher well enthalpies...
Micro Electro Mechanical Systems
(MEMS) are the highly miniature device or an array of devices combining
electrical and mechanical components that is...
Frame relay networks reduce the cost
of transmission lines and equipment and improve network performance and
response time. Designed for transmission...
The objective of the solar power
satellite (SPS) is to convert solar energy in space for use on earth.
Its most significant benefit is the potential for continuously...
“Struck by lightning” is a metaphor
for sudden, unpredictable disaster. A large thunderstorm can produce
over 100 lightning flashes a minute...
WiTricity is nothing but wireless
electricity. Transmission of electrical energy from one object to
another without the use of wires is called as WiTricity...
Due to intermittent natural energy
resources and energy resources seasonal un-balance, a PV-wind hybrid
electrical power supply system was developed...
All renewable energy (except tidal
and geothermal power), ultimately comes from the sun. The earth receives
1.74 x 1017 watts of power...
Recently, due to concerns about the
liberalization of electricity supply, deregulation, and global impact on
the environment, securing a reliable power...
Conventional substations requires,
small installation size, protection against atmospheric pollution and
moisture, noiseless operation, nonexplosive...
WHAT ARE HARMONICS AND WHAT CAUSE
HARMONICS? Harmonics are currents or voltages with frequencies that are
integer multiples of the fundamental...
An Electric shock can occur upon
contact of a human or animal body with any source of voltage high enough
to cause sufficient current flow through the muscles...
The creation of the paper battery
drew from a diverse pool of disciplines, requiring expertise in
materials science, energy storage and chemistry. In...
Tri-Gate transistors, the first to
be truly three-dimensional, mark a major revolution in the Semiconductor
industry. The semiconductor industry continues...
An accurate electric current
transducer is a key component of any power system instrumentation. To
measure currents, power stations and substations conventionally...
While actually giving in to our
body’s natural wants such as sleep, we’re keeping the balance beam in an
upright and neutral position — generally a good...
Hundreds of space missions have been
launched since the last lunar mission, including several deep space
probes that have been sent to the edges of our solar...
RF light sources follow the same
principles of converting electrical power into visible radiation as
conventional gas discharge lamps. The fundamental...
A transducer is a device, usually
electrical, electronic, electro-mechanical, electro-magnetic, photonic,
or photovoltaic that converts one type of...
AMR (Automatic Meter Reading ) is
the modern Power measuring device .it is being used in measuring
electricity , gas , water consumption in many countries on...
Current flow in a conductor always
generates heat. Excess heat is damaging to electrical components.
Overcurrent protection devices are used to protect...
Operating an electrical switch is
like turning on a water faucet. Behind the faucet (or switch) there is a
source of water (or electricity), a way to transport...
A new simple, effective and
inexpensive method for lightning protection of medium voltage overhead
distribution line is using long flashover arresters...
Foot sterp power genration is a new
way to genrate power without any fuel and can be very use full. Here
pizioelectric crystall is use to genrate electrical...
Satellite cross links generally
require narrower bandwidths for increased power concentration. We can
increase the power concentration by increasing...
Increasing global energy demand is
likely to continue for many decades. Renewable energy is a compelling
approach – both philosophically and in engineering...
A burgeoning need exists today for
small, compact, reliable, lightweight and self-contained rugged power
supplies to provide electrical power in such applications...
The electrochemical ultracapacitor
is an emerging technology that promises to play an important role in
meeting the demands of electronic devices and systems...
A transformer is a static device
that transfers electrical energy from one circuit to another through
inductively coupled conductors—the transformer's...
The automation of public electricity
distribution has developed very rapidly in the past few years. The same
basis can be used to develop new intelligent applications...
No energy is required by the load,
and all energy generated by the PV array is stored in the flywheel. The
PV energy is greater than the load and the surplus is...
A scheme of Electricity billing
system called “PREPAID ENERGY METER WITH TARIFF INDICATOR” can
facilitate in improved cash flow management in energy...
In this model we show that how we
can generate a voltage from the busy traffic. Conversion of the
mechanical energy into electrical energy is widely used concept...
Power quality is an increasingly
important issue for all business. A recent study by IBM showed that
power quality problems cost US business more than $15 billion...
Technology is increasing our energy
needs, but it is also showing in new ways to generate power more
effetely with less impact on the environment. One of the...
Adaptive optics is a new technology
which is being used now a days in ground based telescopes to remove
atmospheric tremor and thus provide a clearer and brighter...
Oceans cover more than 70% of
Earth's surface, making them the world's largest solar collectors. The
sun's heat warms the surface water a lot more than the deep...
Audio spot lighting is a very recent
technology that creates focused beams of sound similar to light beams
coming out of a flashlight. By ‘shining’ sound...
The principle behind Fractal Robots
is very simple. You take some cubic bricks made of metals and plastics,
motorize them, put some electronics inside them...
Public concepts of how to share and
manage the finite supplies of water are changing. Increasing competition
exists between power, irrigation, municipal...
Solar Botanic will introduce
artificial trees that make use of renewable energy from `the sun and
wind, they are an efficient clean and environmentally sound...
Circuit breakers are crucial
components for power system operation. The currently adapted
time-directed maintenance strategy and the emerging new
condition-based...
India, the largest democracy with an
estimated population of about 1.04 billion, is on a road to rapid
growth in economy. Energy, particularly electricity...
Cars are immensely complicated
machines, but when you get down to it, they do an incredibly simple job.
Most of the complex stuff in a car is dedicated to turning...
Many of the ordinary brakes, which
are being used now days stop the vehicle by means of mechanical
blocking. This causes skidding and wear and tear of the vehicle...
With the advancement of power
system, the lines and other equipment operate at very high voltages and
carry large currents. High-voltage circuit breakers...
The measurement of electric current
strength is not always easy, especially when the measured signal
requires further electronic conditioning. Simply...
The unique feature of the vehicle is
being solar operated system, but it does not use battery to supply the
motor, instead it uses capacitor banks there are four...
Magnetic Levitation is a way to
suspend objects in air without any support, as if in defiance of
gravity. An unsung phenomenon of the past which is now being put...
A major problem facing Planet Earth
is provision of an adequate supply of clean energy. It has been that we
face “...three simultaneous challenges -- population...
Over the past 15 years, optical
current sensors have received significant attention by a number or
search groups around the world as next generation high voltage...
All of us know that motor is a
machine which produces or imparts motion, or in detail it is an
arrangement of coils and magnets that converts electric energy into...
Have you pulled your car up to the
gas pump lately and been shocked by the high price of gasoline? As the
pump clicked past $20 or $30, maybe you thought about trading...
Accident statistics: India's road
accident record: 16 % of the world's road accident death happens in
India, while India has only 1 % of the world's road vehicles. ...
Supercapacitor is a double layer
capacitor; the energy is stored by charge transfer at the boundary
between electrode and electrolyte. The amount of stored...
The topology of a three-leg voltage
source inverter is shown in Fig. 2.1. Because of the constraint that the
input lines must never be shorted and the output...
S the penetration level of the
renewable energy resources(such as wind, solar, fuel cells, etc) is
increasing, dependence on these resources to support...
Ever since 1973 oil crises, many
countries have justifiably maintained an abiding interest in renewable
energy sources and as a result many renewable energy...
The stator contains six coils of
copper wire, cast in fibreglass resin. This stator casting is mounted
onto the spine; it does not move. Wires from the coils...
Our forefathers marveled at the
invention of glowing light bulbs by Thomas Edison in 1879. However, to
us 21st centurions, the light bulb is nothing out of the...
Needs no manual operation for
switching ON and OFF. When there is need of light. It detects itself
weather there is need for light or not. When darkness rises...
