Momentum wheel based on disc type structure

Abstract

The invention relates to a momentum wheel based on a disc type structure. The momentum wheel comprises a lower layer stator and an upper layer stator, wherein the upper layer stator and the lower layer stator are fixed in parallel; an air gap is formed between the upper layer stator and the lower layer stator; a rotor is arranged in the air gap; a mass block is arranged at the outer side of the rotor; the upper and lower planes of the inside are provided with annular sector grooves in the radial direction; a permanent magnet is fixed in each groove; the magnetizing directions of the permanent magnets at the upper and lower layers are identical; the N poles and the S poles are alternately arranged; stator tooth grooves are formed in the upper layer stator and the lower layer stator; a coil is wound in each stator groove; the stators are fixed with the outer sides of bearings; the center of the rotor is a motor middle shaft; the bearings sheath the middle shaft; and the top of the middle shaft is provided with a photoelectric encoder. The momentum wheel has the advantages that in the moving process, the input is a three-phase power supply; a permanent magnet motor of an axial magnetic field structure is used, the momentum wheel can output great torque; by using the disc type structure of the momentum wheel, the structure of the momentum wheel is compact, and the axial size of the momentum wheel is effectively reduced; fractional-slot structure windings are used, so that the tooth groove torque of the momentum wheel can be effectively reduced, and the movement of the momentum wheel is smooth and stable; and meanwhile, the photoelectric encoder is used, so that the rotation condition of the momentum wheel can be precisely measured.

Description

Technical field [0001] The invention relates to the technical field of momentum wheels, in particular to a momentum wheel based on a disc structure. Background technique [0002] The existing momentum wheel mainly uses a radial magnetic field permanent magnet motor as the driving motor of the momentum wheel. The working principle of these radial magnetic field permanent magnet motors is: the stator is an iron core with coil windings wound on it, and three-phase sine or Square wave voltage, the phase difference between the three phases is 120 degrees. The rotor is a permanent magnet fixed on the rotor tray, with N poles and S poles arranged alternately. When working, the three-phase power supply is connected, and the energized coil generates a rotating magnetic field in the air gap between the stator and the rotor to drive the rotor to rotate. Its shortcomings as a momentum wheel are: the structure is not compact enough to be suitable for occasions where the size of the momentum...

AI Technical Summary

Problems solved by technology

Its disadvantages as a momentum wheel are: the structure is not compact enough, it is difficult to apply to occasions that require the size of the momentum wheel; the output torque and specific torque are small, it is difficult to apply to the agile attitude control system that requires high torque

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