A magnetic levitation momentum ball

Abstract

A magnetic levitation momentum ball is used for spacecraft attitude adjustment. The magnetic levitation momentum ball includes a spherical shell-shaped mover and a plurality of stators. There are three sets of stators, and each set includes two stators with the spherical center of the mover as the center of symmetry. , the axes of the three sets of stators are orthogonal to each other. Each stator contains a stator core and a coil array. The inner surface of the stator core and the mover is spherical, and there is an air gap with the outer surface of the mover. The stator core There are through slots in the radial direction, and the through slots are evenly distributed on the circumference of the stator core; the coil array adopts the stator winding of the disc motor, and the two effective sides of each coil in the coil array are respectively placed on the two through holes of the stator core. in the slot. The invention has the advantages of low cost, integrated suspension and rotation drive, simple and compact structure, small volume and light weight, inherent stable suspension, and simple suspension control.

Description

technical field [0001] The invention relates to the technical field of aerospace, 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, in-orbit spacecraft usually have the demand for attitude stability; for some types of satellites such as reconnaissance satellites, they also have high-precision attitude adjustment requirements. Therefore, the driving device used for spacecraft attitude stabilization and precise adjustment is an important part of spacecraft development. [0003] The momentum wheel that adopts the principle of conservation of momentum moment is the most commonly used driving component for attitude adjustment. 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, but ...

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

Images