Permanent magnet bias-magnetic axial mixed magnetic bearing

Abstract

The invention is a permanent magnet biasing axial mixed magnetic bearing, relating to the technical field of electromechanical engineering, comprising axial control coils, rotor, rotating shaft, stator, permanent magnet, axial stator discs, and axial stator cylinder, where two axial control coils are connected in series and respectively arranged between two axial stator discs and arranged inside and close to the axial stator cylinder; the rotor is jacketed on the rotating shaft; radial stator and permanent are arranged inside the axial stator cylinder and a radial gap is formed between the radial stator and the rotor; two axial gaps are formed between two axial stator discs and the rotor; the two axial stator discs, axial stator cylinder, two axial gaps and rotor compose a complete control flux circuit; the permanent magnet is inserted between the axial stator cylinder and the radial rotor, and forms permanent magnet biasing magnetic circuit path together with the radial gap and the rotor through the two axial gaps, respectively. And the invention need not install a large axial suction disc on the rotating shaft, largely reducing moment of inertia of the rotor, and the structure is simple, and it is easy to install.

Description

technical field [0001] The invention relates to the technical field of electromechanical engineering, in particular to a permanent magnetic bias axial hybrid magnetic bearing, which is suitable for rotating parts in mechanical equipment such as 5-degree-of-freedom magnetic bearing systems, axial positioning of bearingless motors, and high-speed flywheel energy storage systems. Axial non-contact suspension support. Background technique [0002] Since the rapid development of magnetic bearing technology in the 1970s, the technology of radial hybrid magnetic bearings has been relatively mature, while the technology of single axial hybrid magnetic bearings is still rare, especially in the design of mechanical structures and magnetic circuit structures. On the other hand, the design is not very reasonable, and the axial hybrid magnetic bearings generally have the disadvantages of large volume, heavy weight and large power consumption. [0003] In order to reduce the axial and ra...

AI Technical Summary

Problems solved by technology

[0002] Since the rapid development of magnetic bearing technology in the 1970s, the technology of radial hybrid magnetic bearings has been relatively mature, while the technology of single axial hybrid magnetic bearings is still rare, especially in the design of mechanical structures and magnetic circuit structures. In terms of design, the design is not very reasonable, and the disadvantages of large volume, heavy weight and high power consumption of axial hybrid magnetic bearings are common.

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