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Small Spacecraft Missions – How About Flying a CubeSat? - page 25 / 44

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25 / 44

Slide 25

www.pumpkininc.com

Construction

Solar cells

85mm (?) width across face of CubeSat for solar cells

Some USA cells are ITAR-controlled, similar available outside USA

Cover glass (protects against micrometeorites) is likely unnecessary (saves mass), but cover glass adhesive is required to protect cells against atomic oxygen

Cells in series should not be too high (> 28V) nor too low (< 5-8V). Efficiencies favor buck (I.e. down) converters. Redundant strings of cells a must.

Pumpkin’s idea of low-cost TASC cells treated as surface-mount components being tested successfully on KySat project

0.062” (1.5mm) PCBs form a nice, strong but heavy substrate for solar cells. CF might be a lighter and better option.

SC with distributed power may want to route solar cell output voltage to all corners of SC

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