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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.
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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]]
    
==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.
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[[File:Primary_battery_types.png]]
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Table of secondary batteries
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[[File:Secondary_battery_types.png]]
    
==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==
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==Common Power values for Cubesats in Industry==
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{| class = "wikitable"
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|+ Power Consumption
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|-
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|Storage:
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|-
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|
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|Pumpkin battery pack
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|40Wh
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|-
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|Optical Payload:
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|-
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|
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|Nasa's Lunar Cubesat
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|10W
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|-
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|
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|MIT Free-Space
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|15W
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|-
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|Solar panel Production
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|-
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|
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|Nasa's Lunar Cubesat
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|50W
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|-
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|
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|CubeSatShop
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|2.3W per 1U (translates to 48W for similar size of Lunar Cubesat)
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|}
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==Resources to Learn More==
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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.
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[[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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