AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and method for controlling the same

An axial hybrid, AC and DC technology, applied in the direction of shaft and bearing, bearing, holding device with magnetic attraction or thrust, etc., can solve the problem of no patents and literature, and achieve simplified control, reduced volume, and reduced length. Effect

Inactive Publication Date: 2006-02-22
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There are no relevant paten

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  • AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and method for controlling the same
  • AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and method for controlling the same
  • AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and method for controlling the same

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Embodiment Construction

[0025] The specific implementation of the present invention is divided into the following 5 steps:

[0026] 1. Mechanical structure. The three-degree-of-freedom AC and DC radial-axial hybrid magnetic bearing magnetic circuit provides a permanent magnet to provide axial and radial bias magnetic flux at the same time. The permanent magnet material is made of high-performance rare earth material neodymium iron boron, which is divided into 6 pieces, which is convenient for permanent magnets. The axial control magnetic flux is generated by the axial control coil passing through the axial control direct current, and the number of coil ampere turns should be determined according to the actual load capacity required to bear; radial direction; The control magnetic flux is generated by the three-phase alternating current through the radial three-phase coil. According to the requirements of the magnetic circuit, construct the overall mechanical structure and parts structure. The magnetic cir...

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Abstract

This invention relates to a three freedom degree AC-DC radial-axial mixing magnetic bearing, which is fit for the electrical main shaft and rotary main shaft needs suspending support. The permanent magnet will provide radial-axial static bias magnetic flux to generate static bearing ability; the radial controlling coil and the axial controlling coil will provide magnetic flux to generate dynamic suspending force, making the rotor suspending on the balance place in radial-axial three freedom degree. The power enlarging circuit comprises axial liner power amplifier and radial CRPWM current tracking inverter, and the displacement sensor will test the shift of the rotor and then feedback to DSP controller; the DSP will operate PID compute and process, provide controlling signal to power enlarging circuit; the controlling signal will generate controlling current in magnetic bearing coil, and the controlling current will generate magnetic force in operation magnet, by which it can realize the stable suspending and real-time monitoring of the rotor in radial and axial.

Description

Technical field [0001] The invention belongs to the technical field of electric transmission (mechanical transmission) equipment, and specifically refers to a new type of three-degree-of-freedom AC-DC radial-axial hybrid magnetic bearing and its control method, which is suitable for three-degree-of-freedom suspension support of various rotating machinery . Background technique [0002] Since the rapid development of magnetic bearing technology in the 1970s, the research direction has mainly focused on active magnetic bearings that use DC signals to provide static bias magnetic flux and control magnetic flux at the same time, and focus on axial single degree of freedom and radial direction. Research on two-degree-of-freedom magnetic bearings. Any stable rotating system needs to impose constraints on its five degrees of freedom. Therefore, two two-degree-of-freedom radial magnetic bearings and one axial single-degree-of-freedom magnetic bearing are usually used to form a five-degre...

Claims

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Application Information

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IPC IPC(8): F16C32/04H02N15/00
CPCF16C32/0465F16C32/0485
Inventor 朱熀秋谢志意
Owner JIANGSU UNIV
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