Magnetic circuit structure for Hall thruster with large height-diameter ratio

Abstract

The invention provides a magnetic circuit structure for a Hall thruster with a large height-diameter ratio and belongs to the field of the spaceflight electric propulsion technology and the plasma technology. The magnetic circuit structure aims at solving the problem that in order to increase the height-diameter ratio of a discharging channel under the condition that the size of the Hall thruster is kept not to be increased, the magnetic circuit structure design is not ideal. The magnetic circuit structure comprises an upper magnetic pole plate, a lower magnetic conductive bottom plate, an inner iron core, an outer magnetic conductive shield and a magnetic screen. The upper magnetic pole plate of an annular structure is arranged at the upper edge of the outer magnetic conductive shield. The inner iron core of a cylindrical structure is arranged at the center of the upper surface of the lower magnetic conductive bottom plate. The magnetic screen comprises an outer magnetic screen body, an inner magnetic screen body and a magnetic screen base. The outer magnetic screen body is of a cylindrical structure. The magnetic screen base is of a circular-ring-shaped flat plate structure. The inner magnetic screen body is of a trumpet-shaped structure with a downward opening. A clearance is formed between the trumpet small opening end of the inner magnetic screen body and the side wall of the inner iron core. The trumpet large opening end of the inner magnetic screen body is fixed to the inner ring end of the magnetic screen base. The outer ring end of the magnetic screen base is fixed to the inner side wall of the outer magnetic conductive shield. The lower edge of the outer magnetic screen body is fixed to the upper surface of the ring surface of the magnetic screen base.

Description

technical field [0001] The invention belongs to the fields of aerospace electric propulsion technology and plasma technology. Background technique [0002] The Hall thruster is an electric thruster that uses orthogonal electromagnetic fields to ionize and accelerate atomic working fluids, and converts electrical energy into ion kinetic energy. It has the advantages of simple structure, high specific impulse, high efficiency, and high reliability. It is suitable for various aerospace applications At present, it is one of the most mature electric propulsion devices in the world. [0003] The design of the magnetic field in the channel of the Hall thruster is an indispensable part of the thruster research, and it is the key to maintaining the thruster's continuous and stable discharge and controlling the divergence of the ion beam. The magnetic field formed by the ideal magnetic circuit structure should be able to ensure the normal discharge operation of the Hall thruster, and...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of difficult magnetic field design caused by adopting a channel design with a large aspect ratio in order to increase the area of ​​the discharge channel under the premise that the Hall thruster maintains the radial profile size without increasing, and provides a large Magnetic Circuit Structure of Hall Thruster with High Aspect Ratio

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