Electric propulsion power supply full backup switching circuit and switching method

Abstract

The invention discloses an electric propulsion power supply full backup switching circuit and switching method. The circuit comprises a high voltage relay switching circuit, a fault isolation circuit,a command circuit, a telemetric circuit, an input / output interface. An on-off state of the high voltage relay switching circuit is set by a spacecraft instruction, the output power of electric propulsion power supply is transmitted to a power output interface required by a high voltage relay switching instruction after passing through the fault isolation circuit, and telemetry information required by a spacecraft is provided. The electric propulsion power supply full backup switching circuit overcomes the problem of low reliability caused by incomplete backup in the prior art, can realize full backup of two electric propulsion power supply of the spacecraft, and isolates faults of the electric propulsion power supply, thereby improving the reliability of a spacecraft electric propulsion system.

Description

technical field [0001] The invention relates to an electric propulsion power full backup switching circuit and a switching method, which are suitable for electric propulsion spacecraft with two or more electric propulsion power processing units. Background technique [0002] Electric propulsion technology is a spacecraft propulsion technology that uses electric energy to accelerate the propellant to achieve high specific impulse, which can effectively save the amount of propellant carried by the spacecraft and improve the carrying capacity of the spacecraft platform. The electric propulsion power supply (generally called the power processing unit) is a device that converts the power supply of the spacecraft into various power supplies required by the electric thruster. It generally has the characteristics of many power modules, high voltage, high power and power density. Therefore, the electric stress level of the electronic components in the electric propulsion power supply...

AI Technical Summary

Problems solved by technology

[0004] In severe cases, when the two branches of the electric propulsion system fail separately, for example, when the electric propulsion power supply of the first branch fails and the electric thruster of the second branch fails, the electric propulsion system under the existing design scheme will Complete failure may cause the entire spacecraft to fail, causing economic losses of hundreds of millions or billions of RMB

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