Magnetic levitation technology mainly includes magnetic levitation, optical levitation, acoustic levitation, air levitation, electric levitation and particle beam levitation, among which magnetic levitation technology is relatively mature.
There are many forms of magnetic levitation technology, which can be mainly divided into passive levitation and active levitation.
The principle of magnetic levitation:
The magnetic suspension technology system consists of rotor, sensor, controller and actuator, in which the actuator includes electromagnet and power amplifier. Assuming that the rotor is disturbed downwards at the reference position, it will deviate from its reference position. At this time, the sensor detects the displacement of the rotor relative to the reference point, and the microprocessor as the controller converts the detected displacement into a control signal.
Then the power amplifier converts this control signal into a control current, and the control current generates a magnetic force in the actuator magnet, thereby driving the rotor back to the original equilibrium position. Therefore, no matter whether the rotor is disturbed downward or upward, the rotor can always be in a stable equilibrium state.