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Low-consumption permanent-magnet offset external rotor radial magnetic bearing

A permanent magnet bias, low power consumption technology, applied in the direction of bearing, shaft and bearing, shaft, etc., can solve the problems of weakening the suction force of the permanent magnet to the rotor shaft, losing too much magnetomotive force, large excitation current, etc. Operation stability, low power consumption, and the effect of reducing power consumption

Inactive Publication Date: 2007-01-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the current permanent magnet bias outer rotor radial magnetic bearing structures are based on ordinary radial electromagnetic bearings, and permanent magnets are placed upward on the electromagnetic magnetic circuit, so that the magnetic flux generated by the control coil must pass through the permanent magnets. Due to the large reluctance of the permanent magnet, the control coil needs a large excitation current to generate a certain electromagnetic flux; in addition, some structures directly connect the permanent magnet to the stator laminated core, so that the permanent magnet magnetic circuit passes through the stator core. Excessive magnetomotive force will be lost, thus greatly weakening the attraction of the permanent magnet to the rotor shaft; due to the above defects, the existing permanent magnet bias magnetic bearings have the disadvantages of large power consumption, large volume and heavy weight

Method used

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  • Low-consumption permanent-magnet offset external rotor radial magnetic bearing

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Embodiment Construction

[0014] Such as figure 1 , 2 As shown, it is one of the technical solutions of the present invention, the inner magnetic steel, the inner excitation coil, the low power consumption permanent magnet bias outer rotor radial magnetic bearing, which is the basic form of the present invention, and it consists of an outer magnetic ring 1, 1 permanent magnet 2, 2 stator cores 3, 8 excitation coils 4, 2 inner magnetic rings 5, 2 rotor cores 6, 8 air gaps 7, each stator core 3 consists of 4 magnetic poles, 2 A stator core 3 forms 8 magnetic poles at the left and right ends of the magnetic bearing, which respectively form the magnetic poles in the positive and negative directions of the X and Y axes. The magnetic ring 1 is connected with the rotor core 6, the interior of the rotor core 6 is the stator core 3, and there is a certain gap between the outer surface of the stator core 3 and the inner surface of the rotor core 6, forming an air gap 7, and the inner magnetic ring 5 is installe...

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Abstract

A low power consuming eternal magnetic external rotor magnetic axletree comprises outer magnetic loop, eternal magnet, iron stators, magnetism irritation loop, inner magnetic loop, iron stators and air clearance. On each side of X and Y axes, each two iron stators constitute eight magnetic pole in four directions. On each magnetic pole enwind magnetism irritation loop, outside of the iron rotors is the outer magnetic loop, inside the iron rotors are the iron stators, where between the rotors and stators leave air clearance. The inner magnetic loop fix inside of the iron stator. The eternal magnet locates between two inner magnetic loops. The two inner loops link with two iron stators to make a magnetic circle.

Description

Technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a low-power permanent magnet bias external rotor radial magnetic bearing, which can be used as a non-contact support for rotating parts in mechanical equipment such as motors and machine tools. 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 reduce the loss. However, some of the current permanent magnet bias outer rotor radial ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
CPCF16C32/0465F16C32/0468F16C32/0487F16C2300/20
Inventor 房建成马善振孙津济
Owner BEIHANG UNIV
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