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A super high-speed transport system with a non-adhesive drive system that is independent of wheel-and-rail frictional forces has been a long-standing dream of railway engineers. Maglev, a combination of superconducting magnets and linear motor technology, realizes super high-speed running, safety, reliability, low environmental impact and minimum maintenance.
Principle of magnetic levitation
The "8" figured levitation coils are installed on the sidewalls of the guideway. When the on-board superconducting magnets pass at a high
speed about several centimeters below the center of these coils, an
electric current is induced within the coils, which then act as
electromagnets temporarily. As a result, there are forces which push
the superconducting magnet upwards and ones which pull them upwards
simultaneously, thereby levitating the Maglev vehicle.
Principle of lateral guidance
The levitation coils facing each other are connected under the guideway, constituting a loop. When a running Maglev vehicle, that is a
superconducting magnet, displaces laterally, an electric current is
induced in the loop, resulting in a repulsive force acting on the
levitation coils of the side near the car and an attractive force
acting on the levitation coils of the side farther apart from the car.
Thus, a running car is always located at the center of the guideway.
Principle of propulsion
A repulsive force and an attractive force induced between the magnets are used to propel the vehicle (superconducting magnet). The propulsion
coils located on the sidewalls on both sides of the guideway are
energized by a three-phase alternating current from a substation,
creating a shifting magnetic field on the guideway. The on-board
superconducting magnets are attracted and pushed by the shifting field,
propelling the Maglev vehicle.
Renewable energy produced from the wind has garnered much attention and support in recent years but is often criticized for its low output and lack of reliability. But now a super power wind turbine has come along that may be just what the renewable energy industry needs. The MagLev wind turbine, which was first unveiled at the Wind Power Asia exhibition in Beijing, is expected take wind power technology to the next level with magnetic levitation. MagLev Wind Turbine develops efficiencies on all fronts. The unique aerodynamic design captures the kinetic energy of all the wind passing through the swept area.
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