How does the maglev

The idea of ​​creating a magnetic levitation train appeared in the early twentieth century, and the first prototype - "the Transrapid 02" - was created only in 1971 on the territory of the Federal Republic of Germany. maglev improved model was created after 8 years - "Transrapid 05", the first licensed to carry passengers. The track 908 meters built in Hamburg for exhibition IVA 79. The maximum speed of the train was 75 km / h. A first commercial maglev appeared in '84 in the English Birmingham. 600-meter line connects the airport terminal and railway station. At the same time work on the establishment started to maglev in Japan, South Korea and China. How does the maglev - about it in today's issue!

How does the maglev How does the maglev

Maglev, or magnetic levitation train - is a compound that is held above the roadway and moving force of an electromagnetic field. The basis of maglev put basic property of magnets: like poles repel each other, but different - attracted. At the moment there are two main magnetic suspension technology: electromagnetic electrodynamic EMS and EDS.

How does the maglev

In the trains of the first type under the wagon bottom powerful magnets mounted in centimeters from the T-shaped steel sheet. When moving trains magnetic flux passing through the web loop, constantly changing and there arise strong induction currents. They create a powerful magnetic field that repels the magnetic suspension train. Composition levitating due to repulsion of the same poles and the different magnetic poles attract. A special system stores the value of the gap between the magnets 15 millimeters constant. By increasing the clearance system increases the current in the magnet bearing and approximates the wagon decreases - reduces the amperage and the gap increases. Also on electromagnetic maglev set the special batteries, allowing the train to levitate when stopped.

How does the maglev

The movement of trains is carried out by a linear motor - in turn includes a stator winding, creating a traveling magnetic field. the train pulled into the stator field and moves the entire composition. Wherein a frequency of 4,000 times per second is a change of the poles on the magnets by alternately supplying current. Changing the force and frequency allows you to adjust the composition of speed.

There is also electrodynamic EDS-a technique whereby the maglev movement carried out due to the interaction of two fields. One of them is created in the roadway, and the second - on the train body. In contrast to conventional magnets EMS, EDS uses superconducting electromagnets, which can conduct electricity even after power outage.

In addition, EDS needs no special systems adjustment of the distance between the train and the blade. When it occurs reducing the repulsive force, which returns to its original position magnets. And when the distance increases the attraction force, which also leads to stabilization of the system.

Another difference trains created on EDS technology, - the need for additional wheels when traveling at low speeds (up to 150 km / h). Upon reaching high speed wheels are separated from the ground and the train is flying at a distance of several centimeters from the surface. It is also worth noting that due to the strong magnetic fields needed to train the body magnetic protection - shielding. Maglev - the fastest public ground transportation. speed record was set by the Japanese Shinkansen train L0 in April 2015 - he clocked up to 603 km / h.

How does the maglev