Large-torque magnetic suspension flywheel

Abstract

The invention discloses a large-torque magnetic suspension flywheel, which can be used as an execution mechanism for attitude stabilization and attitude maneuver of spacecrafts such as a satellite, an earth observation platform and the like. The magnetic suspension flywheel mainly consists of a base, a sealing cover, a radial decoupling conical magnetic bearing assembly, a core shaft, a rotor assembly, a Lorentz force magnetic bearing assembly, a motor assembly, a sensor assembly and the like. The core shaft is positioned in the center of the wheel body, a stator assembly is positioned at theradial outer side of the core shaft, the rotor assembly is arranged at the radial outer side of the stator assembly, the rotor assembly consists of a wheel flange and a wheel hub, and the Lorentz force magnetic bearing assembly consists of a magnetic bearing stator part and a magnetic bearing rotor part; an adapter plate is connected with the core shaft, the stator assembly and a motor stator; and the sensor assembly consists of a sensor shell and a sensor. The components of the flywheel are arranged reasonably and compactly, the flywheel can be used for attitude stabilization of the spacecraft, and attitude maneuver of the spacecraft can be realized by using large control torque provided by gyroscopic effect of the magnetic suspension flywheel.

Description

technical field [0001] The invention relates to a high-torque magnetic levitation flywheel, which can be used as an actuator for attitude control systems of spacecraft such as satellites and earth observation platforms. Background technique [0002] With the diversification of spacecraft missions such as satellites and earth observation platforms, spacecraft have higher and higher requirements for the actuators of the attitude control system. At present, the flywheel used as the actuator of the spacecraft attitude control system is generally still supported by mechanical bearings. The mechanical bearings have problems such as mechanical wear, unbalanced vibration uncontrollable, and large zero-crossing friction torque. In the existing magnetic levitation flywheel structure based on magnetic bearing support, two single-degree-of-freedom axial magnetic bearings + two two-degree-of-freedom radial magnetic bearing structures are generally used, or two three-degree-of-freedom axi...

AI Technical Summary

Problems solved by technology

No matter which structure is adopted, the main function is to control the attitude of the spacecraft through the momentum exchange system. In order to meet the requirements for the bearing capacity of the spacecraft under the condition of large angular rate, it is necessary to increase the output force of the rotor, which can only be increased by increasing the length of the torsional arm. That is, the span of the bearing rotor, which will inevitably increase the weight and volume of the flywheel, so the existing magnetic levitation flywheel has the disadvantage of small torque

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