maglev trains by sumit sanyal
Post on 13-Jul-2015
Embed Size (px)
Trains that fly on air
How Maglev works.Levitation Systems Power Supply.Propulsion system.Application Information.Maglev Projects.Summary.Queries.
Support SystemThe electromagnets on the underside of the train pull it up to the ferromagnetic stators on the track and levitate the train. The magnets on the side keep the train from moving from side to side. .This means there is no friction between the train and the track!
- The basic principles involve the use of magnetism to levitate an object.
Maglev technology uses the principles of linear induction and magnetism to propel the train forwards or backwards. Now imagine the train is levitated by magnetism upwards as well as forwards.
The combination of repulsive and attractive magnetic forces cause the train to move towards a region of track. In the same fashion, to slow down the train while it is moving, we must apply the repulsive and attractive forces in such a way opposite to which the motion started.
Batteries on the train power the system, and therefore it still functions without propulsion. The batteries can levitate the train for 30 minutes without any additional energy.Linear generators in the magnets on board the train use the motion of the train to recharge the batteries.Levitation system uses less power than the trains air conditioning.
Propulsion SystemThe system consists of aluminum three-phase cable windings in the stator packs that are on the guideway When a current is supplied to the windings, it creates a traveling alternating current that propels the train forward by pushing and pulling.
Magnetic Levitation (Track Side View): --N---N---N---N---N---N ================= n---n----n---n----n---n---n Maglev Propulsion (Top Down View): n---s----n---s----n---s---n ================= --N---S---N---S---N---S +++> ================= n---s----n---s----n---s---n
An alternating current is ran through electromagnet coils on the guide walls of the guide way. This creates a magnetic field that attracts and repels the superconducting magnets on the train and propels the train forward.Braking is accomplished by sending an alternating current in the reverse direction so that it is slowed by attractive and repulsive forces.
When the alternating current is reversed, the train brakes.Different speeds are achieved by varying the intensity of the current.Only the section of track where the train is traveling is electrified.
Application InformationSafetyThe trains are virtually impossible to derail because the train is wrapped around the track.Collisions between trains are unlikely because computers are controlling the trains movements.Maintenance There is very little maintenance because there is no contact between the parts.
ComfortThe ride is smooth while not accelerating..Economic EfficiencyThe initial investment is similar to other high speed rail roads. (Maglift is $20-$40 million per mile and I-279 in Pittsburg cost $37 million per mile 17 years ago.)Operating expenses are half of that of other railroads.A train is composed of sections that each contain 100 seats, and a train can have between 2 and 10 sections.
The linear generators produce electricity for the cabin of the train.
SpeedThe train can travel at about 400 mph. (Acela can only go 150 mph)For trips of distances up to 500 miles its total travel time is equal to a planes (including check in time and travel to airport.)It can accelerate to 200 mph in 3 miles, so it is ideal for short jumps. (ICE needs 20 miles to reach 200 mph.)
Noise PollutionThe train makes little noise because it does not touch the track and it has no motor. Therefore, all noise comes from moving air. This sound is equivalent to the noise produced by city traffic.
EnvironmentIt uses less energy than existing transportation systems. For every seat on a 300 km trip with 3 stops, the gasoline used per 100 miles varies with the speed. At 200 km/h it is 1 liter, at 300 km/h it is 1.5 liters and at 400 km/h it is 2 liters. This is 1/3 the energy used by cars and 1/5 the energy used by jets per mile. The tracks have less impact on the environment because the elevated models (50ft in the air) allows all animals to pass, low models ( 5-10 ft) allow small animals to pass, they use less land than conventional trains, and they can follow the landscape better than regular trains since it can climb 10% gradients (while other trains can only climb 4 gradients) and can handle tighter turns.
Magnetic Field:The magnetic field created is low, therefore there are no adverse effects.
IndiaPune (Pimple Saudagar) Mumbai (Panvel): The Indian Ministry is currently in the process of reviewing a proposal to start a Maglev train system in India. It has already been estimated that the cost to complete this process would be over $30 Billion.
.U.S.A -The united states Congress is planning to spend $1 billion for a test project that either connect Pittsburghs suburbs its airport or Baltimore to the Washington international airport .
. GERMANY - A Transrapid connection linking the city centre of the Bavarian capital Munich to the airport (37km) had been planned. It promised to reduce the connection time from about 40 minutes by the existing S-Bahn (German city railway system) to 10 minutes.
. Maglev trains use magnets to levitate and propel the trains forward.
. Since there is no friction these trains can reach high speeds.
. It is a safe and efficient way to travel.
. Only the part of the track that is used will be electrified so no energy is wasted.
. Linear generators will produce all the electricity needed in the trains interior.
.The train is earthquake proof because the greater space (10 cm) between the track and the train leaves more room for track deformation
ANY QUERIES ?