Abstract
In LEO (low earth orbit Laser communication) engineering, there is a demand to design a power system of high-reliability, to ensure the life of the LEO and reliable operation. The DC/DC has been widely used in the secondary power supply in LEO engineering with its high reliability, high integration and high efficiency. But in the LEO, it is easy to introduce various forms of interference and noise, affect the reliability of power supply directly, thereby affecting the spacecraft's technical performance. To improve the reliability of the secondary power supply, a number of key technical discussions is taken on the Secondary Power design applications. The main contents include: Select of the DC/DC, Redundancy, Derating, EMC, Heat. After taking such measures, the reliability of the secondary power supply is greatly improved, All the result of the experiment and actual application shows that the anti-interference design are effective.
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