Power

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Power

• Rick Navarro
• Justin Maloney-Hahn
• Drew Guckenberger

2
Subsystem Objective

• The power subsystem is required to perform the
  following throughout the life of the mission
• Generate Power
• Store Power
• Regulate Power
• Distribute Power
• Power subsystem (CPS) supports most other
  subsystems and interfaces with all
• Reliable, Accurate, and Robust

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Primary Requirements

• The CPS shall supply at least 1.2 Watts of orbit
  average usable power for the mission lifetime.
• The mass of the CPS shall be no more than 180g.
• The CPS shall cycle subsystems on and off.
• Applicable Documents
• Government/Military Documents
• CUBESAT Design Specifications Doc.
• Launch Services Specifications Doc.

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Primary Requirements

• System-level interconnection chart showing
  Input/Output Requirements

Interface Legend Electrical Informational
Physical
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Primary Requirements

• Subsystem-level interconnection chart showing
  Input/Output Requirements

RJ45
12V
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Primary Requirements
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Vs
Solar Cells (x5)
Batteries 9-12.6V

-Vs
Serial Bus Data
1.5V_Coil_x
Serial Bus Clock
GND_Coil_x
Power Board
Vp_CndH PWR (7-15V)
1.5V_Coil_y
GND_CnDH
GND_Coil_y
GDS_SEL
1.5V_Coil_z
CnDH I/F
COMM_SEL
GND_Coil_z
Heater_SEL
Thermal_Sense_SEL
Vp_Boom Release
Deploy_SEL
GND_Boom Release
Magnetometer_SEL
Coil_x_SEL
5V_GPS
Coil_y_SEL
GND_GPS
Coil_z_SEL
5V_Thermal_Sens
GND_Thermal_Sens
5V_Comm
Vp_Heater
GND_Comm
GND_Heater
3.3V_Comm
Flight Pin
Kill Switch
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Power Board Schematic
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Power Board Schematic
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Power Board Schematic
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Power Board Schematic
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Status

• Hardware Design 80 complete
• PIC Software 50 Pseudocode
• Components 50 of prototype components in, 30
  readily available
• Battery Ordering Problems!
• Solar Panels Coming.
• Prototype Construction Beginning

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Issues/Problems

• Need Lab Equipment
• Oscilloscope
• Voltage Supply
• Multimeter
• Batteries
• CnDH serial/parallel Interface
• Define protocol
• Connectors
• Battery Over-Charge Protection