A three-degree-of-freedom spherical hybrid magnetic bearing with axial self-loop

Abstract

The invention discloses a three-degree-of-freedom spherical hybrid magnetic bearing with an axial self-loop. An outer axial stator, an upper annular permanent magnet, a radial stator, a lower annularpermanent magnet and a lower axial stator sequentially coaxially sleeve a rotator from top to bottom, each of the upper axial stator and the lower axial stator is formed by axially connecting an upperdisc, a middle disc and a receiving disc, the inner end surface of every upper disc extend radially inwards extends to form a conical disc, small discs are arranged between the upper and lower end surfaces of the rotor and the corresponding conical discs, the small discs are closely attached to the upper and lower surfaces of the corresponding conical discs, the upper small disc is located abovethe upper end surface of the rotor, and the lower small disc is located below the lower end surface of the rotor; and axial air gaps are left between the upper and lower small disks and the end surface of the rotor, and a control magnetic flux enters the receiving discs through return air gaps to axially form the self-loop without mounting a pushing disc, so the rotating speed of the rotor is optimized, and coupling of axial and radial magnetic fields is reduced.

Description

technical field [0001] The invention relates to a non-mechanical contact magnetic suspension bearing, in particular to a three-degree-of-freedom spherical hybrid magnetic bearing, which is a hybrid magnetic bearing suitable for the suspension support of a vehicle-mounted flywheel battery. Background technique [0002] The on-board flywheel battery uses the magnetic suspension support and the rotational inertia of the flywheel to achieve energy storage. Due to the limited space of electric vehicles, the volume requirements of the flywheel battery are relatively high. The magnetic bearing is a key component that supports the flywheel battery, and its size directly affects the volume of the flywheel battery. In the design of axial control of the existing magnetic bearing, it is usually realized by adding a thrust plate to the rotor. This design not only increases the quality of the rotor, but also increases the friction and wind resistance of the rotating shaft when the flywhee...

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Problems solved by technology

[0004] The purpose of the present invention is to improve the structure of the existing three-degree-of-freedom hybrid magnetic suspension bearing, solve the problems of its excessive volume, limit the maximum speed of the rotor, and easily produce gyro effect, etc., and propose a compact structure, optimized rotor speed, integration degree, etc. Three-DOF Spherical Hybrid Magnetic Bearing with High Axial Self-loop

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