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Design method for permanent magnet bias outer rotor radial mixed magnetic bearing

A technology of radial mixing and permanent magnet bias, applied in bearings, shafts and bearings, shafts, etc., can solve the problems of unreasonable size of permanent magnets, poor accuracy, and no consideration of the influence of displacement stiffness

Inactive Publication Date: 2007-04-11
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

The existing magnetic bearing design methods all use the best working point of the permanent magnet to design, the purpose is to minimize the volume of the permanent magnet, but the size of the permanent magnet calculated by this method is often unreasonable, and the processing is difficult, because the displacement is not considered The influence of stiffness on the control system, so the existing design methods have the defects of poor accuracy and difficult control

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  • Design method for permanent magnet bias outer rotor radial mixed magnetic bearing
  • Design method for permanent magnet bias outer rotor radial mixed magnetic bearing
  • Design method for permanent magnet bias outer rotor radial mixed magnetic bearing

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Embodiment Construction

[0056] As shown in Figure 1, the design object of the present invention is a radial hybrid magnetic bearing with a permanent magnetic bias outer rotor for a magnetic levitation flywheel, in which 1 is a permanent magnet, 2 is an inner magnetic ring, 3 is a coil, and 4 is a stator Iron core, 5 is the magnetic air gap between the stator and the rotor, 6 is the rotor core, and 7 is the outer magnetic ring. Set the displacement stiffness K of the magnetic bearing according to the requirements of the existing magnetic bearing controller x -1N / um, the permanent magnet inner diameter D is given according to the stator strength and modal requirements pm2 37mm, set the air gap length δ as 0.2mm according to the existing processing level, and the lamination coefficient K fe is 0.85, according to the magnetic field analysis of the magnetic bearing, the magnetic leakage coefficient σ is set to 1.3, and the maximum bearing capacity F is set according to the index requirements of the magne...

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Abstract

The design method of mixed magnetic bearing with permanent magnetic bias outer rotor has the displacement rigidity of the magnetic bearing as main consideration, and the maximum bearing capacity, saturation magnetic induction and tankful rate as restraint conditions. Compared with available design method with optimal work point of the permanent magnet as target, the method of the present invention has the advantages of easy control of magnetic bearing, reasonable permanent magnet size, high accuracy, and being simple and practical. The design philosophy of the present invention may be used in design of different kinds of mixed magnetic bearing with permanent magnetic bias outer rotor.

Description

Technical field [0001] The invention relates to a design method of a non-contact magnetic suspension bearing, in particular to a design method of a magnetic suspension flywheel, a magnetic suspension control moment gyroscope, and other devices that require magnetic suspension support. As a design for various types of permanent magnet bias outer rotor radial hybrid magnetic bearings. Background technique [0002] Magnetic suspension bearings are divided into pure electromagnetic bearings and hybrid magnetic suspension bearings with permanent magnetic bias and electromagnetic control. The former uses large current and consumes a lot of power, and the hybrid magnetic suspension bearings with permanent magnetic bias and electromagnetic control. The magnetic field generated by the permanent magnet bears the main load. Bearing capacity, the electromagnetic field provides auxiliary adjustment bearing capacity, so this kind of bearing can greatly reduce the control current and reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
CPCF16C32/0465F16C32/0487F16C2300/20
Inventor 孙津济房建成王曦韩邦成
Owner BEIHANG UNIV
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