A digital push-down magnetic levitation device and its control method

Abstract

A digital push-down magnetic levitation device, the device includes a magnetic levitation device base and a magnet float, wherein it also at least includes: an electromagnetic coil device unit on the magnetic levitation device base and a magnetic flux collection unit on the magnet float; the electromagnetic coil device unit is a magnetic levitation The electromagnetic coil driving device with single power supply of the device base, which at least includes an H bridge circuit built by NMOS and PMOS field effect transistors, and optocoupler isolation is set at the grid input end of the field effect transistor of the H bridge circuit; the magnetic flux collection unit It includes: a voltage reference chip providing a reference voltage with low ripple for the Hall sensor, a voltage follower, a differential operational amplifier, a voltage dividing resistor, a filter processing module and a separate wiring module. The control method of the invention makes the magnetic levitation device more efficient and energy-saving, the levitation is more stable, and the stable running time becomes longer.

Description

technical field [0001] The invention discloses a digital push-down magnetic levitation device and a control method thereof, belonging to the technical field of levitation storage. Background technique [0002] With the development of magnetic levitation technology, its application fields are becoming more and more extensive. Because of its strong sense of technology and visual impact, it is often applied to art crafts, technology display and other fields. For example, it is suitable for the field of magnetic levitation craft ornamental products to cultivate humanistic sentiments, and it is suitable for jewelry exhibitions to attract customers' attention. , applicable to the field of science and technology teaching for teenagers to stimulate students' interest in science and technology. The main applications include offices, company front desks, high-end hotels, private homes, jewelry appreciation shops, school science and technology museums, etc. [0003] However, in pract...

AI Technical Summary

Problems solved by technology

The drive control of the traditional magnetic levitation device cannot control one electromagnetic coil alone, the control is not flexible enough, and more complex control algorithms cannot be realized. In addition, due to the coaxial series connection of the traditional electromagnetic coils, the voltage at both ends of a single electromagnetic coil is reduced to that of the total power supply. One-half, so that the control force range of the electromagnetic coil to the magnet float is reduced

[0005] Secondly, in the traditional digital push-down magnetic levitation device, its magnetic flux change acquisition unit will be affected by the disturbance of external power supply fluctuations, the signal coupling between the Hall acquisition device and the controller, etc. Accuracy and stability decrease, making the suspension stability of the system worse

[0006] Thirdly, the control system algorithm in the traditional digital push-down magnetic suspension device adopts simple single-closed switching PID control, which cannot run for a long time (one month or more), and the system has poor anti-interference performance

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