A method for controlling a magnetic suspension bearing system

Abstract

The invention relates to a control method of a magnetic suspension bearing system. The magnetic suspension bearing system includes a rotor and a controller. The X-Y coordinate system is rotated at a certain angle to construct the A-B coordinate system. Offset sensors are set on the X and Y axes, and electromagnets are set on the A and B axes. Set the bias coil and the inner end set the control coil. The magnetic suspension bearing system control method of the present invention uses the A-B coordinate system, and uses the electromagnetic force calculation mathematical model whose coordinate origin is not the magnetic center to calculate the control current, which can reduce errors and enhance the system's ability to resist external interference; it can be calculated more accurately The electromagnetic force can be generated, and the control current required to output the specified electromagnetic force can be calculated, so that the bearing rotor can be accurately suspended at any specified position; the design parameters can be optimized according to the experimental data through the optimization algorithm, and the error of the target control force can be controlled Within 10N, the precision, response speed and anti-interference ability of the system are significantly improved.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension bearings, in particular to a control method for a magnetic suspension bearing system. Background technique [0002] With the rapid development of modern industry, the requirements for the speed of rotating machinery are getting higher and higher. However, as the speed increases, the traditional rolling bearing will cause serious heat due to high-speed friction between the rotor and the bearing, resulting in easy damage and reliability of the bearing. reduced sex. In the 1960s, some developed countries began to study active magnetic suspension bearing technology. Magnetic suspension bearing is a new type of bearing that uses electromagnetic force to suspend the rotor in the air, thereby realizing non-contact support. Due to the advantages of high speed, no friction, no mechanical loss, and low power consumption, magnetic suspension bearings are more and more widely used in industrial ...

AI Technical Summary

Problems solved by technology

It can be seen that no matter which method is used, it is impractical or difficult to find the balance point of the bearing by applying external force

[0009] In short, the radial magnetic suspension bearings assembled in the differential form in the prior art still have deficiencies in precision, response speed and anti-interference, and urgently need to be optimized and improved.

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