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在航天等空间产品中使用的分布式供电系统中,总体电路一般只提供27~30 V的直流一次电源,各单机产品大多采用DC/DC模块将该一次电源转换为所需的二次电源,并实现一次地与二次地的隔离。分析了INTERPOINT公司的DC/DC模块的输入端反接后,输入电压对DC/DC模块、电源保护滤波电路及负载的影响,通过仿真与验证试验,得出电源模块输入端反接后单机产品中电源保护电路发生作用,对产品中负载无影响,可以继续使用。电源模块失效分析对航天产品中电源模块中出现类似的故障后的处理提供了参考。
In the distributed power supply system used in aerospace and other space products, the overall circuit generally only provides a primary DC power of 27-30V. Each single product mostly adopts a DC / DC module to convert the primary power into a required secondary power, And to achieve a once and twice isolation. The influence of input voltage on DC / DC module, power protection filter circuit and load is analyzed after the input of DC / DC module of INTERPOINT company is reverse connected. Through the simulation and verification test, it is concluded that the input of the power module is reverse connected and the stand-alone product In the power supply protection circuit, no effect on the load in the product, you can continue to use. The power module failure analysis provides a reference for the handling of similar failures in power modules in aerospace products.