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Maglev Trains. Trains that fly on air…. Prepared by: Ankit Chadha Prathamesh Bhirwatkar Pranav Bhedi Pravin Chavhan Ramchandra Cheke Madhur Chavhan. Introduction. MAGLEV : THE PRINCIPLE. MAGLEV is the principle used in working of Maglev Trains.
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Maglev Trains Trains that fly on air… • Prepared by: • Ankit Chadha • Prathamesh Bhirwatkar • Pranav Bhedi • Pravin Chavhan • Ramchandra Cheke • Madhur Chavhan
MAGLEV : THE PRINCIPLE • MAGLEV is the principle used in working of Maglev Trains. • MAGLEV – Derived from MAGnet and LEVitation. • Method of supporting and transporting objects which is based on the physical property that the force between two magnetized bodies is inversely proportional to their distance. • Magnetic force counterbalances the gravitational pull between a magnet and a guideway.
APPLICATION OF MAGLEV • Maglev principle can be applied in two ways- • Electro-Magnetic Suspension (EMS) System • Electro-Dynamic Levitation (EDL) System
Electro-Magnetic Suspension (EMS) System • It is attraction type of system. • Magnet- guideway geometry is used to attract a direct-current electromagnet towards the track. • EMS levitates the train about one-third of an inch above the guideway. • Maglev train (Transrapid) in Germany works on EMS.
Electro-Dynamic Levitation (EDL) System • It is repulsion type of system. • Eddy currents are generated by superconducting coil operating in persistent current mode. • Eddy currents create a magnetic field and opposes the magnetic field created by traveling coil by Lenz’s law. • EDL levitates the train about 4 inches (10 cm) above the guideway. • Maglev train in Japan works on EDL.
Support System • The 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. • A computer changes the amount of current to keep the train 1 cm from the track. This means there is no friction between the train and the track!
Levitation • The passing of the superconducting magnets by figure eight levitation coils on the side of the tract induces a current in the coils and creates a magnetic field. This pushes the train upward so that it can levitate 10 cm above the track. • The train does not levitate until it reaches 50 mph, so it is equipped with retractable wheels.
Levitation System’s Power Supply • 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 System • The 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.
Propulsion System (Contd.) • 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.
Lateral Guidance • When one side of the train nears the side of the guideway, the super conducting magnet on the train induces a repulsive force from the levitation coils on the side closer to the train and an attractive force from the coils on the farther side. This keeps the train in the center.
Pros and Cons Safety • The 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. • There is very little maintenance because there is no contact between the parts. Maintenance
Pros and Cons (Contd.) Comfort • The ride is smooth while not accelerating. • The 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 Economic Efficiency
Pros and Cons (Contd.) Speed • The train can travel at about 300 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.) • It 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 - 1 litre ; At 300 km/h - 1.5 litres ; At 400 km/h - 2 litres • This is 1/3 the energy used by cars and 1/5 the energy used by jets per mile. Environment
Pros and Cons (Contd.) • 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 • Use less land than conventional trains • Can handle tighter turns.
Pros and Cons (Contd.) • The 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. Noise Pollution
Pros and Cons (Contd.) Magnetic Field The magnetic field created is low, therefore there are no adverse effects.
Less susceptible to congestion and weather conditions than air or highway. Petroleum Independence. Less Polluting. Maglev trains experience no rolling resistance, leaving only air resistance, potentially improving power efficiency. Maglev trains produce less noise than a conventional train at equivalent speeds. ADVANTAGES
ADVANTAGES (Contd.) • Faster trips, High speed, Less time. • Eliminates the need for overhead wires compared to conventional trains. • Average cost is 4 cents per passenger mile as compared to 13 cents per passenger. • Access to Maglev station is much easier than airports. • Maglev schedule will not be disturbed due to bad weather.
Large initial capital investment. Lack of human experience with Maglev technology. Designing of tracks. DISADVANTAGES
Shanghai Maglev • Double-track project started on March 2001. • Connects the Pudong International Airport and the Longyang Road Station. • The total cost of the project is about 10 billion yuan (1.2 billion US dollars). • Takes 7 minutes and 20 seconds to complete the distance of 30 km.
Shanghai Maglev (Contd.) • Uses EDS mechanism. • Has a design speed of over 500 km/h (310 mph). • Has a regular service speed of 430 km/h (267 mph). • Set world record achieving top speed of 501 km/h (311 mph) in November 12,2003. • Noise level less than 60 decibels at 300 km/h. • Shanghai Maglev is the fastest railway system in commercial operation in the world.
Shanghai Maglev (Contd.) • Line operates daily between 06:45–21:30 • One-way ticket cost ¥50 (US$7.27 ) or ¥40 ($5.81) for those passengers holding a receipt or proof of an airline ticket purchase. • Round-trip return ticket cost ¥80 ($11.63) • VIP tickets cost double the standard fare. • The service operates once every 15 minutes. • Of all the world's Airport Rail Links, the Demonstration Operation Line is by far the fastest.
Route of Shanghai Maglev (Contd.) The Shanghai Maglev moving across the city
Emsland Maglev • Construction of the facility began in 1980 and was completed in 1984. • The total cost of project was 1 billion $. • Uses EMS mechanism. • Current working model-TR07. • Runs between Dörpen and Lathen. • Fare is $25 for a two way tour. • Demonstrated safe operation at 270 mph (121 m/s). However, can attain a max. speed of 311 mph (139 m/s).
Emsland Maglev • Uses separate conventional iron-core attracting electromagnets to generate vehicle lift and guidance. • TR07 propulsion is by a long-stator LSM. • Control systems maintain an inch gap between train and guideway.
Linimo Maglev • World's first commercial automated "Urban Maglev" system. • Built for the 2005 World Expo in Nagoya Japan . • Connects Bampaku-yakusa station to Fujigaoka station. • The line serves the local community. • The total cost was $100 million per km.
Linimo Maglev • Runs at average speed of 100 km/h. • Designed by the Chubu HSST Development Corporation. • Uses EMS mechanism. • Floats 8 mm above the track being held up by magnetic force.
Linimo Maglev • Able to carry 4000 passengers in each direction every hour. • Linimo is a Japanese MAGLEV train which is far less famous than Shanghai's one. • It is not an express train but a local train and is very normal train at first look. • However, if you ride on it, you will notice that there is no driver at the front seat and the train is very silent when it is running underground tracks.
Maglev Bullet Train (Shinkasen) • Being tested on a test track in Yamanashi prefecture. • Developed by the Central Japan Railway Co. ("JR Central") and Kawasaki Heavy Industries. • Proposed to connect Tokyo to Osaka. • Use superconducting magnets. • Uses EDS mechanism. • Achieved a world record speed of 581 km/h on December 2, 2003 .
Advantages over Linimo Maglev • Uses higher speed potential. • Uses repulsive system than attraction system. • Provides larger air gap. • Thus, accommodates the ground motion experienced in Japan's earthquake-prone territory.
Major Hindrances for Shinkasen Maglev • The design of Japan's repulsion system is not firm. • Very expensive
