Two-air-gap outer rotor radial hybrid magnetic bearing with fault-tolerant function

Abstract

The invention provides a two-air-gap outer rotor radial hybrid magnetic bearing with fault-tolerant function, comprising an outer magnetic conductive ring, a left rotor iron core, a right rotor iron core, a left stator iron core, a right stator iron core, excitation coils, a left magnetic conductor, a right magnetic conductor, a permanent magnet and a separating magnet, wherein the left rotor iron core and the right rotor iron core are connected with the outer magnetic conductive ring; the outside of the left stator iron core and the right stator iron core are respectively provided with the left rotor iron core and the right rotor iron core; a first class of air gap is formed by the outer surface of a stator and the inner surface of a rotor; the interiors of the left stator iron core and the right stator iron core are respectively connected with the left magnetic conductor and the right magnetic conductor; the permanent magnet is positioned between the left magnetic conductor and the right magnetic conductor; a second class of air gap is formed by the left magnetic conductor and the right magnetic conductor which are respectively arranged above and under the permanent magnet; sixteen magnetic poles are formed by the left stator iron core and the right stator iron core, a pole shoe form is adopted by the stator magnetic poles, and each magnetic pole is wound with one excitationcoil; and the magnetic poles of the left stator iron core and the right stator iron core are separated by the separating magnet, so that coupling of the stator magnetic poles can be avoided.

Description

technical field [0001] The invention relates to a non-contact hybrid magnetic suspension bearing, in particular to a radial hybrid magnetic bearing with two air-gap permanent magnetic bias outer rotors and a fault-tolerant function. Background technique [0002] At present, 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 power consumption, and hybrid magnetic suspension bearings with permanent magnetic bias and electromagnetic control. The electromagnetic field provides auxiliary adjustment. Bearing capacity, the magnetic field generated by the permanent magnet bears the main bearing capacity, which has the advantages of reducing the loss of the power amplifier, reducing the number of ampere turns of the electromagnet, and reducing the volume and weight of the magnetic bearing, so the permanent magnet bias hybrid magne...

AI Technical Summary

Problems solved by technology

The radial magnetic bearing of this structure generates a static bias magnetic field through the current, which has the disadvantages of high power consumption, large volume and weight, etc.

In addition, there is a permanent magnet bias radial magnetic bearing with fault tolerance function (patent number: 200710063271.1), but due to the serious coupling of the electromagnetic magnetic circuit in the X direction and the Y direction, it will make the control of the magnetic bearing more difficult. , and the flux density of the air gap between the stator and rotor of the magnetic bearing fluctuates greatly, thus increasing the rotational power consumption of the magnetic bearing

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