How do maglev train float above the track?

How Maglev Trains Work. The magnetized coil running along thetrack, called a guideway, repels the large magnets on the train'sundercarriage, allowing the train tolevitate between 0.39 and 3.93 inches (1 to 10 centimeters) above the guideway. ... Maglev trains float on a cushion of air, eliminating friction.



Maglev (magnetic levitation) trains float using the fundamental principles of magnetic repulsion and attraction. There are two primary technologies: Electromagnetic Suspension (EMS) and Electrodynamic Suspension (EDS). In EMS systems (used in the Shanghai Maglev), the bottom of the train wraps around the guideway. Electromagnets on the train are attracted upward toward the metallic track, lifting the train about 10mm off the surface. Computer sensors constantly adjust the current to maintain this precise gap. In EDS systems (developed in Japan), superconducting magnets on the train interact with conductive coils in the track walls. As the train moves, it induces a magnetic field in the track that repels the train's magnets, pushing it roughly 10cm upward. Because there is no physical contact between the train and the track, friction is eliminated, allowing these "floating" vehicles to reach speeds exceeding 600 km/h (373 mph) with remarkable efficiency and quietness.

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The front corners have magnets with north poles facing out, and the back corners have magnets with south poles outward. Electrifying the propulsion loops generates magnetic fields that both pull the train forward from the front and push it forward from behind. This floating magnet design creates a smooth trip.

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There are several disadvantages to maglev trains: - Maglev guide paths are more costly than conventional steel railway tracks. Because the magnetic coils and material used in this setup are very costly. - Maglev trains require an all-new set up right from the scratch.

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As of 2022, the United States has no maglev trains. Keystone Corridor: According to Transrapid, Inc., Pittsburgh has the most advanced maglev initiative in the U.S., followed by the Las Vegas project. Once federal funding is finalized, these two markets could be the first to see maglev in the United States.

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This reaction between the magnets creates a magnetic field. The field lifts the train off of the track. This lets air flow between the train and the guideway. The trains never touch the track; they hover just above the track.

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Because maglev trains require entirely new guideways, cars, and power specifications, they must be built from scratch. Despite their decades-long allure, implementation costs can be prohibitive relative to HSR. Today there are only six operational maglev trains—three in China, two in South Korea, and one in Japan.

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Present Maglev systems cost 30 million dollars or more per mile. Described is an advanced third generation Maglev system with technology improvements that will result in a cost of 10 million dollars per mile. Plotkin, D.; Kim, S. Lever, J.H.

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China initially relied on high-speed technology imported from Europe and Japan to establish its network. Global rail engineering giants such as Bombardier, Alstom and Mitsubishi were understandably keen to co-operate, given the potential size of the new market and China's ambitious plans.

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The Maglev has significantly lower CO2 emissions compared too the traditional InterCity train at 300 kph, mainly due to its lower energy usage. At 400 kph the Maglev has almost half the CO2 emissions than an average motor car and a massive five and a third times less than a short haul airline flight.

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The design of the guideway -- whether the German “T” shape for the wrap-around vehicle or the Japanese “U” shape with the vehicle enclosed -- ensures that the trains are safe from derailment. Today, maglev trains are generally considered to be among the most safe and comfortable rapid transit systems in the world.

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While high-speed maglev infrastructure is relatively expensive to build, maglev trains are less expensive to operate and maintain than traditional high-speed trains or planes. At higher speeds, most of the power needed is used to overcome air drag.

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Even if the power goes out, levitation forces keeps the train in the air while it is traveling at high speed. The vehicle comes safely to a stop rather than suddenly falling onto the track.

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As noted above the Maglev trains are capable of traveling at speeds nearly twice as fast as the bullet trains. However, the use of such extreme speeds in commercial travel seems unlikely. Whereas Maglev trains travel at speeds of up to 400 or 600kph, bullet trains travel at a modest 320kph.

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