What does the maglev train rely on to advance? How the maglev train moves forward

A maglev train is a train that is propelled by magnetic attraction and repulsion. Since the magnetic force of its orbit makes it levitate in the air, it does not need to touch the ground when walking, so its resistance is only that of air. Maglev trains can reach a maximum speed of more than 500 kilometers per hour, which is faster than the more than 300 kilometers per hour of wheel-rail high-speed trains, so they can become aviation competitors.

As early as 1922, German engineer Hermann Kemper proposed the principle of electromagnetic levitation, and applied for a patent for a maglev train in 1934. After entering the 70s, with the continuous strengthening of the economic strength of the world's industrialized countries, in order to improve the transportation capacity to meet the needs of their economic development, developed countries such as Germany, Japan, the United States, Canada, France, and the United Kingdom have begun to plan the development of maglev transportation systems. The United States and the former Soviet Union abandoned this research program in the seventies and eighties, respectively, and only Germany and Japan are still continuing to study the maglev system, and both have made remarkable progress.

Know the electric motor, right? Commonly known as the "motor", the driving principle of the maglev train is like cutting the motor, spreading the shell with the coil and then the car running on the track like the stator rotating in the motor (the shell with the coil is equivalent to the track).

Rely on magnetism. The energized wire body will be affected by the magnetic force in the magnetic field, but if the direction of its force is parallel to the direction of progress, the train can move forward! If you want to brake, then you only need to turn on the reverse current, but the size of the reverse current should be appropriate. Otherwise, it will cause an accident!

Magnetism. It is done through the transformation of the positive and negative electrodes.

Maglev trainsThe principle of moving forward:

The principle of the maglev train is to use the property of the magnet "the same sex repels each other, and the opposite sex attracts", so that the magnet has the ability to resist gravity, that is, "magnetic levitation". This principle is applied to the railway transportation system, so that the train is completely off the track and suspended, becoming a "wheelless" train, with a speed of more than several hundred kilometers per hour. This is the so-called "maglev train".

The train is equipped with superconducting magnets, which move forward at high speed due to levitation. These coils are fixed at the bottom of the railway, due to electromagnetic induction, an electric current is generated in the first circle, and the polarity of the magnetic field generated by the ground coil is always the same as the polarity of the electromagnet on the train, so that there will always be a repulsive force between the first ring and the electromagnet, so that the train is suspended.

Advantages of maglev trains:

1. Fast speed. Maglev trains are the only ground passenger transport vehicles that can reach operating speeds of up to 500 kilometers per hour.

This means that for inter-city travel between cities with a distance of 500 km to more than 1,000 km, maglev trains are completely comparable to airplanes in terms of travel time and travel quality.

2. Low relative energy consumption. At a speed of 500 kilometers per hour, the energy consumption per seat kilometer of the maglev train is only 1 3 to 1 2 of that of an airplane, which is 3 percent less than that of a car.

3. Easy to turn, able to climb slopes, flexible line selection, and strong adaptability. The maglev high-speed line requires a much smaller turning radius than conventional railways and has a climbing capacity of up to 10. This allows the maglev line to be more flexible to adapt to the terrain, which can reduce the cost of construction.

4. Low noise. Due to the absence of friction between wheels and rails, the noise of maglev trains is lower than that of conventional railways at the same speed.

5. No pollution. Since the maglev train is powered by electricity, its development is not limited by the energy structure, especially the fuel **; At the same time, there is no exhaust gas along the track, and it is a veritable green means of transportation.

6. Safety, comfort and less maintenance. The maglev train is not easy to derail in terms of structure, and the propulsion mode ensures that it is not easy to crash. The maglev train has no contact between the wheels and the rails, the vibration is small, the comfort is good, its work belongs to the wear-free operation, the maintenance is mainly focused on electronic technology, and does not require a lot of manual labor.

The maglev train is a kind of maglev high-speed train system that uses a contactless electromagnetic levitation, guidance and drive system. Its speed can reach more than 500 kilometers per hour, is the world's fastest ground passenger transportation, has the advantages of fast speed, strong climbing ability, low energy consumption, low noise during operation, safety and comfort, no fuel, less pollution, etc. And it adopts an elevated method, which occupies very little arable land.

Maglev trains mean that these trains use the basic principle of magnetism to levitate on rails instead of old steel wheels and rail trains. Magnetic levitation technology uses electromagnetic force to lift the entire train car, getting rid of the annoying friction and unpleasant clanging sound, and achieving a fast "flight" without contact with the ground and without fuel.

Anyone with a little knowledge of physics knows that if two magnets are close to the same pole, they repel each other, and conversely, if you bring the opposite pole closer, they attract each other. The seemingly mysterious force of levitation that holds up the maglev train is actually these two forces of attraction and repulsion.

In terms of an accurate definition, the maglev train actually relies on electromagnetic attraction or electric repulsion to levitate the train in the air and guide it, so as to achieve no mechanical contact between the train and the ground track, and then use a linear motor to drive the train to run. Although the maglev train still belongs to the land rail transportation system, and retains the characteristics of many traditional rolling stock such as tracks, turnouts, vehicle bogies and suspension systems, it may become an ideal land transportation tool for people to dream of because there is no mechanical contact between the train and the track during traction operation, so it fundamentally overcomes the problems of traditional train wheel-rail adhesion limitations, mechanical noise and wear.

According to the basic principle of attraction and repulsion, there are two development directions for maglev trains in the world. One is the conventional magnet suction suspension system EMS system represented by Germany, which uses the basic principle of conventional electromagnets and general ferrous substances to attract the train and run in the air, and the air gap of suspension is small, generally about 10 mm. The speed of the constant-guided high-speed maglev train can reach 400-500 kilometers per hour, which is suitable for long-distance rapid transportation between cities; The other is the repulsive suspension system EDS system represented by Japan, which uses the principle of superconducting magnetic levitation, so that the repulsive force between the wheel and the rail is generated, so that the train is suspended in the air, the suspension air gap of this maglev train is larger, generally about 100 mm, and the speed can reach more than 500 kilometers per hour.

Both countries firmly believe that their systems are the best, and both are pushing their technologies to the practical stage. It is estimated that in the next century, these two technological routes will still coexist!

Details.

The maglev train doesn't have wheels, so what does it rely on?

Golden Key Tournament ???

Magnetic levitation.