Discharge loop for reducing starting impact of Hall thruster and soft start method thereof

Abstract

The invention provides a discharge loop for reducing starting impact of a Hall thruster and a soft start method thereof. According to the discharge loop, a filter module is additionally arranged, andan excitation coil is placed behind the filter module. The soft start method comprises the steps of optimizing power supply, gas supply mode and timing. The filter module belongs to a RLC low-pass filter loop as a whole, and the influence of low-frequency oscillation of discharge current on a power processing unit can be reduced. The connection relation of the excitation coil is that the positiveend of the coil is connected to the common ground of the thruster, and the negative end of the coil is connected to the negative end of an anode power supply, so that the current fluctuation of the excitation coil is reduced as much as possible. According to the discharge loop for reducing starting impact of the Hall thruster and the soft start method thereof, the starting impact of the Hall thruster can be greatly reduced, it is guaranteed that the thruster and the power processing unit can work stably and reliably for a long time, and the available ignition times of the Hall thruster is effectively improved.

Description

technical field [0001] The invention relates to the field of Hall thruster control, in particular to a discharge circuit and a soft start method for reducing the starting impact of the Hall thruster. Background technique [0002] The Hall thruster is one of the most widely used electric thrusters at present, and has the advantages of high thrust density, high specific impulse, and simple structure. The traditional Hall thruster ignition process is as follows: figure 1 As shown, the starting impact test results are as follows figure 2 shown. The traditional ignition method is: gas supply from cathode and anode; ignition, heating, anode, excitation and other power supplies are energized in a rated manner at the same time; after the thruster is ignited, turn off the ignition and heating, and the thruster starts to work in a rated manner; open as needed Auxiliary excitation. [0003] The traditional ignition method is to ignite when all the power sources are powered on. At ...

AI Technical Summary

Problems solved by technology

[0003] The traditional ignition method is to ignite when all the power sources are powered on. At this time, due to the instantaneous breakdown of the cathode, a very large instantaneous ignition current will be generated. Under the traction of the electric field, it is easy to reach the anode of the thruster, causing huge start-up shock

At the same time, since the excitation coil of the thruster and the heating wire of the cathode can be regarded as inductive elements, a large induced potential and current will be induced instantaneously, which will endanger the reliability of the power supply and the thruster

Therefore, this traditional starting method can ensure the successful ignition of the thruster, but it endangers the reliability of the thruster, power supply, etc. At the same time, the EMC shock interference of the system at the moment of ignition will also affect the work of other surrounding equipment.

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