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| ==The Basics== | | ==The Basics== |
− | Satellite power modules are widely known as '''electrical power systems, or EPS'''. If you are purchasing Cubesat components as a kit, the EPS will come as a self contained unit, batteries inluded, with outputs for voltage bus distribution. The EPS can be broken down conceptually into four smaller blocks. They are the [[#Power Sources]], the [[#Energy Storage]], the [[#Power Distribution]], and the [[#Power Regulation and Control]] modules. | + | Satellite power modules are widely known as '''electrical power systems, or EPS'''. If you are purchasing Cubesat components as a kit, the EPS will come as a self contained unit, with outputs for voltage bus distribution and battery connnections. The EPS can be broken down conceptually into four smaller blocks. They are the [[#Power Sources|power sources]], the [[#Energy Storage|energy storage]], the [[#Power Distribution|power distribution]], and the '''Power Regulation and Control''' modules. |
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| + | For those interested in designing their own power system, a table of the design steps can be found below courtesy of Space Mission Analysis by Wiley Larson. |
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| + | [[File:Design_Process_for_Power_Subsystems.png]] |
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| ==Power Sources== | | ==Power Sources== |
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| Most satellites store their power through a set of primary and secondary batteries. One can find a table of industry standard batteries and their characteristics below. | | Most satellites store their power through a set of primary and secondary batteries. One can find a table of industry standard batteries and their characteristics below. |
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− | Table of primary batteries.
| + | [[File:Primary_battery_types.png]] |
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− | Table of secondary batteries
| + | [[File:Secondary_battery_types.png]] |
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| ==Power Distribution== | | ==Power Distribution== |
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| Solar cell operating characteristics graph. Caption: the PPT keeps the solar pannels operating along the center line of peak performance. | | Solar cell operating characteristics graph. Caption: the PPT keeps the solar pannels operating along the center line of peak performance. |
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− | ==Power Regulation== | + | ==Common Power values for Cubesats in Industry== |
| + | {| class = "wikitable" |
| + | |+ Power Consumption |
| + | |- |
| + | |Storage: |
| + | |- |
| + | | |
| + | |Pumpkin battery pack |
| + | |40Wh |
| + | |- |
| + | |Optical Payload: |
| + | |- |
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| + | |Nasa's Lunar Cubesat |
| + | |10W |
| + | |- |
| + | | |
| + | |MIT Free-Space |
| + | |15W |
| + | |- |
| + | |Solar panel Production |
| + | |- |
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| + | |Nasa's Lunar Cubesat |
| + | |50W |
| + | |- |
| + | | |
| + | |CubeSatShop |
| + | |2.3W per 1U (translates to 48W for similar size of Lunar Cubesat) |
| + | |} |
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| + | ==Resources to Learn More== |
| + | MIT open courseware. Class on how to build a satellite. [http://ocw.mit.edu/courses/aeronautics-and-astronautics/16-851-satellite-engineering-fall-2003/index.htm Very useful information] |
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| + | [http://www.cubesatkit.com/docs/press/20120420_Pumpkin_CSDWSLO_2012-2.pdf Pumpkin talk on Power Systems] |
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− | Lead into discussion about PPT in Power Distribution.
| + | [[Category: Satellites]] |
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− | Change organization to just power sources; solar. Power storage batteries. Power distribution; bus for different sized sats PPT system. Pwr regulation, shunt resistors, Thermal regulation.
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− | Nominal values for Off the shelf components.
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− | ==Resources to Learn More==
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− | MIT open courseware http://ocw.mit.edu/courses/aeronautics-and-astronautics/16-851-satellite-engineering-fall-2003/index.htm
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