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KGCOE MSD Technical Review. P12407- Clean, Self-Sustained Photovoltaic Energy Harvesting System Josh Stephenson Mike Grolling Thomas Praderio. Project Objective.

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kgcoe msd technical review

KGCOE MSD Technical Review

P12407- Clean, Self-Sustained Photovoltaic Energy Harvesting System

Josh Stephenson

Mike Grolling

Thomas Praderio

project objective
Project Objective

Utilize and properly manage energy from multiple sources to drive a load or charge a battery with high efficiency for portable applications

customer requirements
Customer Requirements
  • Design will include safety and component failure
  • Ability to manage inputs from multiple power sources
  • Investigate and benchmark technologies, components and modules
  • System will integrate power management and load distribution.
  • Establish highly efficient energy conversion parameters and design
  • System must manage energy source variability
  • Provide data acquisition points for future team\'s display design
  • System must be portable
  • System must include instructions for set-up and use
project specifications
Project Specifications
  • Ability to generate ~5W of power
  • Voltage stabilization for battery charging (~15V ±0.05V)
  • Output voltage of 10V
  • Full solar delivery, provide a max output current of 0.5A
  • Energy Storage is ~5 A-h
  • Multiple solar panels
  • Benchmark given component\'s specifications
  • Calculate, design, measure each function
  • List DAQ points
  • Efficiencies for each function
phase 1 preliminary design
Phase 1: Preliminary Design
  • Incorporates single energy source
  • Winter in Rochester– Forced to rely on artificial light
  • Batteries used during experimentation were 12 years old and
  • did not hold charge very long
  • Flexible PV panels did not supply enough power
  • Buck/Boost did not maintain required voltage while charging
  • Learning curve on PCB layout software
  • Scheduling with PCB ordering during the Chinese New Year
  • Working with BGA footprint
challenges continued
Challenges continued
  • Express PCB or Eagle CAD?
    • Proprietary vs. open standards
    • Licensing and version issues
  • Finding vendor footprints
    • Finding LGA footprints for the buck-boost
  • Board house selection
    • Price, capabilities, scheduling (Chinese new year)
  • Final decisions:
    • Eagle 5.7 for schematic and board layout
    • MyRo PCB for fabrication
fractional gain amplifier f or voltage sensing
Fractional Gain Amplifier for Voltage Sensing

Both op amps are powered with a 3V button-cell CR2032

future considerations
Future Considerations
  • Troubleshoot analysis on PCB
  • Added display for real-time data capture
  • New batteries