Magnetic suspension momentum sphere

Abstract

The invention discloses a magnetic suspension momentum sphere used for spacecraft attitude adjustment. The magnetic suspension momentum sphere comprises a spherical-shell-shaped rotor and three groups of stators. Each group of stators comprises two stators taking the sphere center of the rotor as the symcenter, and axes of the three groups of stators are mutually orthogonal. Each stator comprises a stator core and a coil array. Inner surfaces, matched with the rotor, of the stator cores are spherical surfaces, and air gaps are reserved between the spherical surfaces and the outer surface of the rotor. Through grooves are formed in the stator cores radially and are evenly distributed on the circumferences of the stator cores. The coil arrays refer to disc-type motor stator windings. Two effective sides of each coil in each coil array are placed in two through grooves of the corresponding stator core respectively. The magnetic suspension momentum sphere has the advantages that cost is low, suspension and rotation driving are integrated, the magnetic suspension momentum sphere is simple and compact in structure, small in size and low in mass and belongs to fixed stable suspension, and suspension control is simple.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a magnetic levitation momentum ball used for attitude adjustment of spacecraft. Background technique [0002] Due to the effects of various disturbance forces in space, on-orbit spacecraft usually have a requirement for attitude stability; for some types of satellites such as reconnaissance satellites, there is also a need for high-precision attitude adjustment. Therefore, the driving device used for spacecraft attitude stabilization and precise adjustment is an important part of spacecraft development. [0003] The momentum wheel adopting the principle of momentum moment conservation is the most commonly used driving component for attitude adjustment at present. The existing mature technology is the mechanical ball bearing momentum wheel. Although the new generation of magnetic suspension momentum wheel overcomes some shortcomings of the mechanical ball bearing momentum wheel...

AI Technical Summary

Problems solved by technology

From the perspective of reducing satellite size, increasing satellite payload, and reducing costs, the shortcomings of existing momentum wheels hinder the miniaturization and cost reduction of satellites to a certain extent

[0005] The magnetic levitation momentum ball can solve the above-mentioned problems of the momentum wheel. The existing magnetic levitation momentum ball technology is mostly a permanent magnetic synchronous magnetic levitation momentum ball, which is complicated to manufacture and expensive, which is not conducive to miniaturization and low cost, which limits its application.

Most of the existing inductive magnetic levitation momentum balls cannot realize the integration of levitation and drive, which is not conducive to the attitude control of the spacecraft; moreover, most of the levitation is realized by suction, which is not an inherently stable levitation system, and the levitation control is complicated

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