Magnetic levitation inductor coils are components that utilize magnetic and electrical control techniques to keep objects suspended in a fixed position in the presence of magnetic forces. They operate based on the principles of magnetic circuit laws and the dynamics of magnetic force generation in a magnetic field region, consisting of a controller and an actuator. By aligning the magnetic field direction with the geometric center of the magnet above and ensuring that the magnetic force equals the gravity acting on the magnet, the object above can be suspended at a certain point in mid-air. A gentle touch on the suspended object, such as a globe, can cause slight rotation, which then returns to its original position. Magnetic levitation inductor coils can be used in applications such as magnetic levitation advertising displays, maglev trains, magnetic levitation globes, magnetic levitation gifts, magnetic levitation bearings, magnetic levitation isolation systems, and magnetic levitation vehicle model displays.
Due to the absence of contact between the levitated object and its support, magnetic levitation inductor coil technology overcomes the energy consumption and speed limitations caused by friction. It offers advantages such as long lifespan, low power consumption, no pollution, no noise, no speed restrictions, and safety and reliability. The working principle of magnetic levitation inductor coils involves using closed-loop control methods to achieve the desired levitation state of the object. High-frequency eddy currents are induced on the surface of the metal material, and the interaction between these eddy currents and an external magnetic field results in the sample experiencing a Lorentz force. With the appropriate spatial configuration, the direction of the Lorentz force can be opposite to the direction of gravity, and by adjusting the power of the high-frequency source, electromagnetic force can be made equal to gravity.
Typically, the alternating current frequency used in magnetic levitation inductor coils ranges from 104 to 105 Hertz. Additionally, the Joule heat generated by eddy currents on the metal surface can melt the metal, allowing for the melting of metals without the need for a container. The servo device rapidly controls the magnetic field strength to ensure that the position of the levitated object remains unchanged. Magnetic levitation inductor coils utilize eddy currents generated on the metal surface by a high-frequency electromagnetic field to achieve the levitation of metal spheres.