A main backup power failure detection and automatic switching control circuit

Abstract

The invention discloses a main and backup power supply fault detection and automatic switching control circuit which comprises a main module power supply and a backup module power supply, wherein the main module power supply and the backup module power supply are connected in parallel with each other; the output ends of the main module power supply and the backup module power supply are both cascaded with isolation circuits of completely identical circuit structures, so that parallel redundancy between two modules of a power supply is realized; the main and backup power supply fault detection and automatic switching control circuit can monitor working states of the main and backup power supplies in real time and realize automatic fault detection and switching between the power supply modules; compared with the conventional relay-control main and backup switching circuit, the main and backup power supply fault detection and automatic switching control circuit has the advantages that the mechanical design difficulty of the module power supplies is reduced, and the reliability of the module power supplies is improved; and the main module power supply and the backup module power supply are mutually controlled, so that the requirement that the main power supply is powered on first under a condition that the module power supplies work normally is met, and a power-on time sequence control circuit is eliminated.

Description

technical field [0001] The invention relates to a main backup power supply failure detection and automatic switching control circuit. The invention belongs to the general technical field of aerospace, and relates to a main backup automatic switching circuit of a module power supply required by aerospace electronic products, which can also be widely used on the ground in electronic equipment. Background technique [0002] A spacecraft is a huge system composed of many different functional units. All functional units need a power supply to work. For the power supply, these functional units are loads with different power and power requirements, and must be designed with high reliability and high Only a power supply with strong performance and adaptability can ensure the reliable and safe operation of the spacecraft within the design life, and even extend the service life of the spacecraft. [0003] In order to solve the reliability problem of the module power supply, there are...

AI Technical Summary

Problems solved by technology

This control method has certain disadvantages. First, the relay has risks such as electric shock vibration and adhesion, which affect the reliability of the module power supply. In order to ensure the reliability of electrical functions, the relay has a relatively complicated peripheral circuit, which increases the difficulty of mechanical design of the module power supply. Increase the design and economic cost of the power supply

[0005] After retrieving relevant documents at home and abroad, there is no automatic switching circuit for the main backup of the module power supply of the present invention

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