Rotation modulation Lorentz force bearing

Abstract

The invention discloses a rotation modulation Lorentz force bearing which mainly comprises a rotor sleeve, a backing ring, magnetic steel, a magnetism spacing ring, a lock nut, coils, a stator framework, an air gap, a stator installation disc, a rotation modulation rotor bearing sleeve, a rotation modulation bearing body, a rotation modulation stator lock nut, an ultrasonic motor rotor, an ultrasonic motor stator, a rotation modulation stator bearing sleeve and a rotation modulation stator lock nut. Due to the fact that a stator of the rotation modulation Lorentz force bearing is driven through an ultrasonic motor, rotation of the stator is achieved, the rotation modulation function is achieved, the gyroscopic drift caused by rotation of a gyrorotor can be eliminated, and the detection precision of the rotation modulation Lorentz force bearing in angular speed detection is greatly improved.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a Lorentz force-magnetic bearing with rotation modulation function, which can be used as a non-contact support for rotating parts in a small spacecraft, and is especially suitable for non-contact support of a magnetic suspension sensitive gyroscope. Background technique [0002] With the development of aerospace technology, spacecraft such as satellites and space stations have higher and higher precision requirements for attitude control, and traditional mechanical offset momentum wheels can no longer meet the requirements. The magnetic suspension offset momentum wheel is supported by magnetic bearings, which eliminates the wear caused by mechanical bearings and improves the precision and stability of the control torque. [0003] In the existing magnetic suspension bias momentum wheel, a reluctance magnetic bearing or a Lorentz force magnetic bearing is generally used....

AI Technical Summary

Problems solved by technology

[0003] Reluctance magnetic bearings or Lorentz force magnetic bearings are generally used in existing magnetic suspension bias momentum wheels. The electromagnetic force and current of the force magnetic bearing have a linear relationship, and the control accuracy is high

Both the patent CN102303709B and the paper "A Magnetic Suspension Gyro Flywheel Scheme Design and Key Technology Analysis" have designed Lorentz force magnetic bearings. The former controls two radial deflection degrees of freedom by changing the magnitude and direction of the current in the coil, and the latter Use the linear relationship between Lorentz force and current to control the axial force, but both structures are relatively complicated

In addition, if the existing magnetic levitation bias momentum wheel or magnetic levitation gyroscope is to realize its detection function as a sensitive component, it is often limited by the environmental disturbance torque, which leads to the reduction of the accuracy of the detection component.

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