Student Satellite Project Power Generation and Distribution 1 Power Generation and Distribution WINTER ’99 REVIEW Chieh-Kuen Woo Team Leader.

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Presentation transcript:

Student Satellite Project Power Generation and Distribution 1 Power Generation and Distribution WINTER ’99 REVIEW Chieh-Kuen Woo Team Leader

Student Satellite Project Power Generation and Distribution 2 PGD TEAM MENTOR: Dr. Hal Tharp (ECE) –LEADER: Chieh-Kuen Woo –MEMBER: Kwanduck Kim, Kok-Hian Tan Solar Panels design: Kwanduck Kim, Chieh-Kuen Woo Power Subsystem design: Kok-Hian Tan, Chieh-Kuen Woo

Student Satellite Project Power Generation and Distribution 3 Areas of Investigation Power Subsystem – Direct Energy Transfer (DET)  Power Source – Power from Solar Panels (Body Mounted) with different satellite surface area

Student Satellite Project Power Generation and Distribution 4 Power Subsystem DET System Shunt Regulator : Shunt Drivers (transistors) and Shunt Resistors  Charger and Batteries  Voltage Comparator: Compare load voltage with preset voltage, and send error signal to Digital Control Logic if the load voltage is 1% less than preset voltage.  Digital Control Logic:  Will control over: - Shunt Regulator: - on/off the transistors  Charger: - charge or discharge

Student Satellite Project Power Generation and Distribution 5 DET Block Diagram

Student Satellite Project Power Generation and Distribution 6 Solar Panels  Body mounted solar cells : Gallium Arsenide (GaAs) cells  Ratio of solar cells area to satellite area (one side)  6 sided, 8 sided, and 12 sided had been studied.  Larger area of each side (6 sides) has higher ratio than the small area (12 sides)  %: (Area of Cell arrays mounted on one side)/(Area of satellite[one side])

Student Satellite Project Power Generation and Distribution 7

Student Satellite Project Power Generation and Distribution 8 Solar Panels (cont.)  Power output from designed area –>> Power calculation with (2cm * 4cm) GaAs cells: 12 sided : 36W 8 sides: 38W 6 sides: 33W

Student Satellite Project Power Generation and Distribution 9 Battery Pressure Vessel

Student Satellite Project Power Generation and Distribution 10 What needs to be done in Spring’99?  Prototyping the subsystem –Comparator circuit –Power source –Basic model of DET system  Further investigation on the subsystem  Digital Control Logic