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Design method for permanent magnet bias outer rotor radial magnetic bearing

A technology of permanent magnet bias and design method, applied in the direction of bearing, shaft and bearing, shaft, etc., can solve the problems of unreasonable size of permanent magnet, difficult processing, poor accuracy and so on

Inactive Publication Date: 2007-04-11
BEIHANG UNIV
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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

Method used

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

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Embodiment Construction

[0052] As shown in Figure 1, the design object of the present invention is a radial magnetic bearing of a permanent magnetic bias outer rotor for a magnetic levitation flywheel. Among the figures, 1 is the stator core, 2 is the coil, and 3 is the magnetic air gap between the stator and rotor. 4 is a permanent magnet, 5 is a magnetic ring, and 6 is a rotor core. Set the displacement stiffness K of the magnetic bearing according to the requirements of the existing magnetic bearing controller x It is -1N / um, and the radial inner height D of the stator core is given according to the requirements of the stator strength and mode s2 42mm, 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 magnetic levitation flywhe...

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Abstract

The design method of radial 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 radial 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 permanent magnetic bias outer rotor radial magnetic bearing for a magnetic suspension flywheel, a magnetic suspension control moment gyroscope, and other devices that require magnetic suspension support. The design idea can be used as Design of various types of permanent magnet offset outer rotor radial 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 bear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
CPCF16C32/0468F16C32/0487F16C2300/20
Inventor 房建成孙津济杨磊王鹏王曦
Owner BEIHANG UNIV
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