A momentum wheel based on a moving coil motor

Abstract

Disclosed is a momentum wheel based on a moving coil motor. The momentum wheel based on the moving coil motor is characterized in that a cavity is formed between an upper cover of a housing and a center support pillar of a housing bottom seat, an inner ring of a rotation shaft is fixed on the periphery of the center support pillar of the housing bottom seat, located in the cavity, a rotor iron core with a coil wound around is fixed on an outer ring of the rotation shaft in the cavity, the rotor iron core and the coil form a rotor portion of the momentum wheel, stator portions of the motor, which are permanent magnets, are respectively fixed on the upper portions and the lower portions of the rotor iron core and the coil, the upper cover of the housing and the inner wall of the housing bottom seat, the magnetizing direction of each permanent magnet is along the vertical direction, and a slide ring is placed in the cavity between the rotor iron core and the housing bottom seat. During the running process of the momentum wheel based on the moving coil motor, single phase direct voltage is input into the momentum wheel, and therefore electric current running fluctuation in the coil is small; relative positions of rotors and stators can not influence a magnetic circuit, and therefore external circuits which monitor positions of the rotors in real time are not needed, and circuit complexity is reduced; whole permanent magnets are used as the stators, and therefore magnetic field intensity in a space where the coil is located is high, and large torque can still be provided under the circumstance that electric currents are small.

Description

Technical field [0001] The invention relates to the technical field of momentum wheels, in particular to a momentum wheel based on a moving coil motor. Background technique [0002] The existing momentum wheels mainly use brushless DC motors as the power source. The working principles of these DC motors are as follows: the stator is a coil wound iron core, the coil is a three-phase winding method, and three-phase direct current is energized. The direct current waveform is a square wave and three-phase. The phase difference between them is 120 degrees. When working, current is applied to generate a rotating magnetic field between the coil and the air gap of the permanent magnet of the rotor, which drives the permanent magnet to rotate. The disadvantage of it as a momentum wheel: the position of the motor rotor needs to be measured during operation to adjust the input current waveform and phase of the motor, so a complex drive circuit is required; due to current commutation, the o...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a momentum wheel based on a moving coil motor; during the operation of the momentum wheel, the input is a single-phase DC voltage, the current in the coil is relatively stable, and the operation fluctuation is small ; Since the relative position of the momentum wheel rotor and the stator does not affect the magnetic circuit, there is no need for an external circuit for real-time measurement of the rotor position, reducing the complexity of the circuit; since the momentum wheel stator uses a whole piece of NdFeB permanent magnet, the space where the coil is located The magnetic field strength is high, and it can still provide a large torque in the case of a small current

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