Magnetic levitation motor suspension method:
The principle is that when the magnetic field near metal changes, electrons in the metal move, generating an electric current. A second principle is the magnetic effect of current.
Major development obstacles
The first railway appeared in 1825. After 160 years of development, its operating speed exceeded 300 km/h. It took nearly another 30 years to increase from 300 km/h to 380 km/h. Although the technology is still being refined and developed, there is considerable room for further speed increases. It should also be noted that the cost of a 350 km/h high-speed railway is nearly twice that of a 160 km/h high-speed railway and three times that of a 120 km/h conventional railway.
In comparison, the world's first small-scale maglev train models appeared in Germany in 1969, and Japan in 1972. However, just ten years later, in 1979, maglev technology set a speed record of 17 km/h. The technology is not yet mature enough to enter the construction stage for practical operation at 300 km/h. When current flows through a wire or a piece of metal, it generates a magnetic field. A coil of wire with current flowing through it becomes a magnet. The third principle of magnetic levitation is all too familiar: magnets interact with each other: like polarities repel, and opposite polarities attract.
When a magnet passes over a piece of metal, the metal's electrons begin to move due to the change in the magnetic field (Principle 1). These electrons form a circuit, which in turn generates their own magnetic field (Principle 2). To put this process in simpler terms, the moving magnet creates a hypothetical magnet within the metal.
This hypothetical magnet has a directional property: its polarities are opposite, so it repels the existing magnet. That is, if the existing magnet has its north pole facing downward, the hypothetical magnet will have its north pole facing upward.
The opposite is also true. Because like poles repel (Principle 3), the magnet moving over the metal creates an upward force on the moving magnet. If the magnet moves fast enough, this force can be strong enough to overcome the downward force of gravity and lift the moving magnet. So when the magnet moves, it floats above the metal, maintaining its buoyancy thanks to the force generated by the movement of its electrons.
This process is known as magnetic levitation, and this principle can be applied to trains.
The above is an introduction to the working principles of magnetic levitation motors. Follow us for more product information.
