高压砷化镓太阳电池阵在地球同步轨道环境下的二次放电现象

发布时间：2018-09-17 13:38

【摘要】：高压(HV)部件是引起整星失效的单点故障源,其可靠性对于卫星在轨安全运行至关重要;充放电导致高压部件的二次放电已成为制约卫星研制和安全使用的瓶颈问题。为此,通过地面模拟高压砷化镓太阳电池阵在轨实际的带电环境,复现了高压砷化镓太阳电池阵在此环境下一次静电放电和二次放电的产生过程,并对采用被动防护方法、不同结构尺寸高压砷化镓太阳电池阵的充放电性能进行了研究。研究结果表明:局部充电不平衡是引起高压砷化镓太阳电池阵样品产生一次静电放电的原因;未涂覆室温硫化型硅橡胶(简称RTV)的三结砷化镓高压太阳电池阵样品在80 V工作电压下触发二次放电事件,导致高压太阳电池阵串电路永久性短路击穿。涂覆RTV可降低高压砷化镓太阳电池阵一次静电放电产生的放电次数和放电能量,进而减少二次放电的产生。
[Abstract]:High voltage (HV) part is the single point fault source that causes the whole satellite failure, and its reliability is very important for the safe operation of the satellite in orbit, and the secondary discharge of the high voltage component caused by charge and discharge has become the bottleneck problem that restricts the development and safe use of the satellite. Therefore, by simulating the actual charged environment in orbit of high voltage GaAs solar cell array on the ground, the generation process of first electrostatic discharge and secondary discharge of high voltage GaAs solar cell array in this environment is reappeared, and the passive protection method is adopted. The charge-discharge performance of high voltage GaAs solar cell array with different structure sizes has been studied. The results show that the partial charge imbalance is the cause of the single electrostatic discharge of the high voltage GaAs solar array samples. Uncoated room temperature vulcanized silicone rubber (RTV) can trigger a secondary discharge event at 80V working voltage for tri-junction gallium arsenide high voltage solar array samples, which leads to a permanent short-circuit breakdown of high voltage solar array circuits. Coating with RTV can reduce the discharge frequency and discharge energy generated by the primary electrostatic discharge of GaAs solar cell array, and then reduce the secondary discharge generation.
【作者单位】：兰州空间技术物理研究所;中国电子科技集团公司第十八研究所;
【基金】：国家重点基础研究发展计划(973计划)(613211)~~
【分类号】：TM914.4

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