Permanent magnet biased inner rotor radial magnetic bearing

A technology of permanent magnet bias and magnetic bearings, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of serious coupling of radial magnetic bearings, multiple magnetomotive forces, large excitation currents, etc., to ensure the stability of operation , save the control circuit, reduce the effect of axial size

CN1279291CInactive Publication Date: 2006-10-11BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2006-10-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a permanent magnet bias inner rotor radial magnetism bearing that is made up of out magnetizer, out magnetism separator, exciting winding, inner magnetizer, rotor iron core. Four stator iron cores form four magnetic poles and are connected with each other by out magnetism separator. Eight stator iron core forms eight magnetic poles and every stator magnetic pole has exciting winding. Outside the stator iron core is out magnetizer that is connected to stator iron core. The permanent magnet is located between the two out magnetizers. Inner the stator iron core is rotator iron core. And there is clearance between the inner surface of the stator iron core and the out surface of the rotator iron core. The second clearance exists between the out magnetizer and the permanent magnet to form electric excitation circuit. The invention has the advantage of reliability and easy to be controlled.
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Description

Technical field

[0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a permanent magnetic bias inner 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, the current permanent magnet bias inner rotor radial magnetic bearing stru...

Examples

Embodiment Construction

[0014] Such as figure 1 , 2 As shown, it is the outer magnetic steel of one of the technical solutions of the present invention, the outer magnetic coil permanent magnet bias inner rotor radial magnetic bearing, which is the basic form of the present invention, and it consists of 2 outer conducting magnets 1, 1 permanent magnet 2. 8 stator cores 3. 8 outer magnets 9. 8 excitation coils 4. 1 inner magnetic ring 5. 2 rotor cores 6. 8 stator cores 3 form the left and right ends of the magnetic bearing X, Stator magnetic poles in the Y direction, wherein every 4 stator cores 3 form 4 stator magnetic poles in the X and Y directions at one end of the magnetic bearing, and 8 outer spacer magnets 9 are connected to the left and right ends of the magnetic bearing. The stator cores in the X and Y directions 3. Each stator pole is wound with an excitation coil 4, and the outside of the stator core 3 is an outer conduction magnet 1, and the permanent magnet 2 is located between the two o...