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Design and Implementation of High Reliability Electrical Power System for 2U NutSat

机译：2U Nutsat高可靠性电力系统的设计与实现

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摘要

This article proposes the design and implementation of an electrical power system (EPS) for 2U CubeSat using a single-ended primary-inductor converter (SEPIC) along with the perturbed and observe method for the maximum power point tracking (MPPT). SEPIC converters have the advantages of input current continuity, voltage boosting and bucking, short-circuit protection, low-side driver, and noninverted input and output voltages. When the battery voltage is too low, by adding a low power consumption latching relay to develop a novel topology, the battery can be directly charged with solar panels without the MPPT algorithm and to improve the system reliability. In addition to the on-board computer subsystem, we can independently control whether to turn on the power according to the battery capacity and importance priority for each subsystem of CubeSat. The satellite is operated in outer space that the environment is wide temperature variation, vacuum, and high electromagnetic radiation. Therefore, the satellite was subjected to various types of tests, such as vacuum, thermal cycling, and radiation tests, to verify the system's capacity for enduring the aforementioned environmental changes. Finally, implementations and various tests were carried out to verify the viability and the accuracy, and reliability of the EPS of the satellite.
机译：本文用单端初级电感器转换器（SEPIC）以及用于最大功率点跟踪（MPPT）的扰动和观察方法，提出了用于2U CubeSat的电力系统（EPS）的设计和实现。 SEPIC转换器具有输入电流连续性，电压升压和支支，短路保护，低侧驱动器和非致命输入和输出电压的优点。当电池电压太低时，通过增加低功耗锁存继电器来开发新颖的拓扑，可以直接用MPPT算法直接充电，并提高系统可靠性。除了板载计算机子系统外，我们还可以根据CubeSat的每个子系统的电池容量和重要性优先级独立控制是否打开电源。卫星在外部空间中运行，环境宽温度变化，真空和高电磁辐射。因此，卫星经受各种类型的测试，例如真空，热循环和辐射测试，以验证系统持续上述环境变化的能力。最后，进行了实现和各种测试以验证卫星EPS的可行性和准确性和可靠性。

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