A cold backup module power supply

Abstract

A cold backup module power supply, comprising a surge suppression circuit (2), an input filter circuit (3), a power conversion circuit (4), an output filter circuit (5), an auxiliary power supply control circuit (7), and an auxiliary power supply circuit (8 ), an isolated current sampling transformer (9), an isolated drive circuit (10), a main module power controller (11), and a switch control circuit (17). Compared with the prior art, the modular power supply of the present invention effectively suppresses the surge current when starting up by adding a surge suppression circuit and a filter circuit, avoids the impact of large current on the subsequent stage circuit, and reduces the electromagnetic interference of the converter. It has good electromagnetic compatibility. At the same time, the auxiliary power supply circuit of the present invention adopts a two-way output power supply mode. While ensuring the normal power supply of the integrated chip, it also provides sufficient driving power for the relay, and avoids failure to drive when the driving command power is low. Defective operation of the relay.

Description

technical field [0001] The invention relates to a power supply suitable for relatively low driving command power, in particular to a cold backup module power supply. Background technique [0002] With the rapid development of aerospace technology, the power capacity of the spacecraft power supply system continues to increase, and the power of communication series satellites increases from (2 to 3) kW to (8 to 10) kW, and the power of the latest generation of large-capacity communication satellites will increase To (20 ~ 30) kW, the design life is increased from 8 years to 15 years. In addition, in order to increase the success rate of launch, the reliability of electronic equipment is required to be continuously improved, so the reliability of the module power supply that supplies power to electronic equipment is also required to be continuously improved. The traditional methods to improve the reliability of the module power supply are: to ensure the first-level derating of...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a cold backup module power supply. By using two output power supply modes in the auxiliary power supply, while ensuring the normal power supply of the integrated chip, it also provides a Sufficient driving power solves the problem that the existing technology cannot drive the relay to work under the condition of low driving command power

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