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Cathode Independent Life Test Outer Circuit for Simulating Cathode and Electric Thruster Coupled Discharge Current Oscillation

An electric thruster and discharge current technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problem of poor reliability of cathode life test, and achieve the effect of easy parameters, simple circuit connection, and improved reliability.

Active Publication Date: 2018-03-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the existing problems that the simulated current oscillation environment does not match the actual work when the cathode is subjected to a separate life test, and the reliability of the cathode life test is poor, and proposes a cathode that simulates the coupling discharge current oscillation of the cathode and the electric thruster Independent life test outer loop

Method used

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  • Cathode Independent Life Test Outer Circuit for Simulating Cathode and Electric Thruster Coupled Discharge Current Oscillation

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specific Embodiment approach 1

[0010] Specific implementation mode 1. Combination figure 1 Describe this embodiment mode, the cathode independent life test outer loop of the simulation cathode described in this embodiment mode and electric thruster coupling discharge current oscillation, it comprises direct current power supply (DC), alternating current power supply (AC), No. 1 inductance (L1), No. 2 inductor (L2), resistor (R) and capacitor (C);

[0011] The anode of the hollow cathode (HC) is connected to one end of the capacitor (C) and one end of the inductor (L1) at the same time, the other end of the capacitor (C) is connected to one end of the resistor (R), and the other end of the resistor (R) is connected to the second One end of the inductor (L2), the other end of the second inductor (L2) is connected to one power signal output end of the AC power supply (AC), and the other power signal output end of the AC power supply (AC) is connected to the other end of the first inductor (L1). One end is con...

specific Embodiment approach 2

[0012] Specific embodiment two, this embodiment is a further description of the cathode independent life test outer loop of the simulated cathode and electric thruster coupling discharge current oscillation described in specific embodiment one, the inductive reactance of No. 1 inductance (L1) is 10mH, The capacitive reactance of the capacitor (C) is 0.1uF, the inductive reactance of the second inductor (L2) is 0.7mH, the frequency of the AC power supply (AC) is 17KHz, the voltage is 22V, the resistance of the resistor (R) is 5Ω, and the power is 75W .

[0013] The discharge current of the hollow cathode (HC) of the cathode independent life test outer loop test of the simulated cathode and the electric thruster coupling discharge current oscillation described in this embodiment is in the range of 4A-10A. When the discharge current is 4A, the discharge voltage is 20.71V, the amplitude of current oscillation is ±1.21A.

[0014] When the hollow cathode (HC) discharge current is 8...

specific Embodiment approach 3

[0015] Specific embodiment three, this embodiment is a further description of the cathode independent life test outer loop of the simulated cathode and electric thruster coupling discharge current oscillation described in specific embodiment one, the inductive reactance of No. 1 inductance (L1) is 5mH, The capacitive reactance of the capacitor (C) is 0.1uF, the inductive reactance of the second inductor (L2) is 0.2mH, the frequency of the AC power supply (AC) is 31KHz, the voltage is 22V, the resistance of the resistor (R) is 5Ω, and the power is 75W .

[0016] The discharge current range of the hollow cathode of the cathode independent life test outer loop test of the simulated cathode and the electric thruster coupling discharge current oscillation described in this embodiment is 4-10A, when the discharge current of the hollow cathode (HC) is 4A, the discharge voltage is 20.72V, and the amplitude of the current oscillation is ±0.94A.

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Abstract

A cathode independent service life test outer loop simulating coupling discharging current oscillation of a cathode and an electrical thruster belongs to the technical field of a hollow cathode in the electrical thruster, and solves the problem of poor reliability on test of the service life of the cathode since a simulated current oscillation environment does not accord with practical work when the cathode is subjected to independent service life test in prior art. An anode of the hollow cathode is connected with one end of a capacitor and one end of a first inductor; the other end of the capacitor is connected with one end of a resistor of which the other end is connected with one end of a second inductor; the other end of the second inductor is connected with one power source signal output end of an alternative current power source of which another power source signal output end is meanwhile connected with another end of the first inductor and the anode of a direct current power source; a cathode of the direct current power source is connected with the cathode of the hollow cathode. The outer loop is suitable for testing and simulating the independent service life of the cathode of the coupling discharging current oscillation of the cathode and the electrical thruster.

Description

technical field [0001] The invention belongs to the technical field of hollow cathodes in electric thrusters. Background technique [0002] The hollow cathode in the electric thruster mainly provides high-energy electrons for the ionization of the propellant and plays a role in neutralizing the ion plume. Once the cathode fails, the entire electric propulsion device will not be able to complete ignition and discharge, resulting in complete failure of the electric propulsion device. Therefore, its life directly limits the reliability of the entire electric propulsion device. Although research institutions in various countries in the world have carried out ground life tests on hollow cathodes, the current oscillation of hollow cathodes during this test does not match the coupling work of electric thrusters. During the working process of the electric thruster, due to the ionization instability of the neutral gas atoms in the discharge channel, this phenomenon leads to an insta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 于达仁李文博宁中喜魏立秋韩亮
Owner HARBIN INST OF TECH