Group #26 Andrea Solano-EE Juan Valera-EE Manuel Keesee-EE Randall Lay-EE
Table of Contents 1. 1. Pr Proje oject ct Ov Over ervie view 2. 2. Revis vision ion A/B A/B 3. 3. Fin Final al Revis vision ion 4. 4. Time Time Lin Line e of of Pr Proje oject ct 5. 5. Gr Grou oup p Res espo pons nsib ibili ilities ties 6. 6. Fina Financ ncials ials
Project Motivation: South Africa Pomolong Township • Supply renewable energy to a small community center located in the Pomolong Township in South Africa • Impact the lives of many by powering a essential electronics such as computer, a projector, lights, and other devices use for educational purposes
Pomolong Township Community Center Power Needs Total Est. Total Item Watts Quantity Watt Hours Watts hours Lights 15 2 5 150 30 Computer 65 1 5 325 65 charger Projector/ 300 1 5 1500 300 TV Maximum Power 395 Watts Energy in a single day: ~2 KW∙hrs
Goals & Objectives • Charge a 24V battery bank safely and reliably • Deliver necessary power to the user when demanded • Deliver necessary energy types to the user when demanded (i.e. USB, American standard (110V), and European standard (220V)) • Overall robust and reliable energy storage system
Design Specifications • Input Source ~ 24V – 30V (DC) • System Power Output ~ 2000W – AC Voltage: 110Vrms & 220Vrms – DC Voltage: 5Vdc (USB port) • 24V Battery Bank • Utilization of wind and Solar energy sources
Table of Contents 1. 1. Pr Proje oject ct Ov Over ervie view 2. 2. Revis vision ion A/B A/B 3. 3. Fin Final al Revis vision ion 4. 4. Time Time Lin Line e of of Pr Proje oject ct 5. 5. Gr Grou oup p Res espo pons nsib ibili ilities ties 6. 6. Fin Finan ancia cials ls
Components Overview Revision A Inverter PV Panels Battery Bank MPPT Charge Controller PM Bypass Circuit USB Wind Turbine Housekeeping E Controller Rectifier Transformer Dump Load
Renewable Energy Sources Sources provided by the mechanical Engineers: • Solar tracking team • Wind tower team Lessons Learned: • Communication is key • Larger amount of people on a project can add more problems than solve
Components Overview Revision A Inverter PV Panels Battery Bank MPPT Charge Controller PM Bypass Circuit Wind Turbine Transformer Housekeeping E Controller Rectifier Dump Load
Charge Controller Buck & Boost Converter Sch has a 12V system needs to be 24V CSD18532KCS MOSFET 60-V, N-Channel Power MOSFETs Buck Mode Boost Mode
Charge controller Buck & Boost Converter Lessons Learned: • Modes of a MOSFET Cutoff V GS <V th Linear Region V GS >V th and V DS < V GS – V th Saturation V GS >V th and V DS >= V GS – V th • Ringing in MOSFET High Frequency Low Current • Robust and Forgiving
Charge Controller H- Bridge Driver: SM72295 Parameter SM72295 Switching frequency 220kHz Analog Supply 10 V Voltage Digital Supply 5 V Voltage Peak Output Current 3 A Lessons Learned: • Limited ability to sink Operating -40 ° C to 125 ° C current Temperature i.e. lower the external gate Current Sense resistor value Other Features Amplifiers
Charge Controller SM72442 Parameter SM72442 Analog Supply -.3V to 6V Voltage Digital Supply -.3 to 6V max Voltage Input Current at 10mA any pin Lessons Learned: Package Input • Sensitive to electrostatic 20mA Current shock and/or any other voltage than the required 5V Operating -40 ° C to 105 ° C • I2C communication (for this Temperature device) requires recurring start bit not stop bit then start bit
Printed Circuit Board Data Schematic
Printed Circuit Board Data Schematic
Printed Circuit Board Power Schematic
Printed Circuit Board
Table of Contents 1. 1. Pr Proje oject ct Ov Over ervie view 2. 2. Revis vision ion A/B A/B 3. 3. Fin Final al Revis vision ion 4. 4. Time Time Lin Line e of of Pr Proje oject ct 5. 5. Gr Grou oup p Res espo pons nsib ibili ilities ties 6. 6. Fin Finan ancia cials ls
Components Overview Final Revision Inverter PV Panels Battery Bank Lead-Acid Battery Charger Wind Turbine Transformer Housekeeping E Controller Rectifier Dump Load
Lead-Acid Battery Charger UC3906 Parameter UC3906 Input Voltage <40 Volts Bulk Charging stages Absorption Float Maximum Current 15 Amps to battery Package Dip Pin Power 16mW – 33 mW Consumption
Housekeeping Controller Inverter PV Panels Battery Lead-Acid Bank Battery Charger Wind Turbine Transformer Housekeeping E Controller Rectifier Dump Load
Housekeeping Controller Overview Solar Wind Turbine Interface Charging Charging Voltage CPU and Housekeeping Current Controller Data on the Sources
Data Collection ADS7830 Parameter ADS7830 package TSSOP 16 8 single-ended A/D Pins 4 differential 8-bit 70-ksps A/D conversion Internal/external reference Communication *I2C Protocols 2.7V – 5V Voltage Supply Power 180 uW Consumption (Standard Mode)
Housekeeping Controller Solar Wind Turbine Interface Charging Charging Voltage CPU and Housekeeping Current Controller Data on the Sources
Housekeeping Controller LCD Screen: LCD-09395 Parameter 16x2 LCD Communication *I2C Operating 5V Voltage Operating 60mA Current Power ~ 300mW Consumption Cost $10
Housekeeping Controller I2C 3.3V to 5V Voltage Leveler Parameter TCA9406 Operating Voltage Vcca:1.6 V-3.6 V Vccb:2.3 V-5.5 V Level Translation Range 3.3 V to 5 V Communication I2C (For LCD screen)
Housekeeping Controller Solar Wind Turbine Interface Charging Charging Voltage CPU and Housekeeping Current Controller Data on the Sources
Housekeeping Controller MSP430G2553 MSP430 Parameter LaunchPad Chip MSP430G2553 20 pins: I/O Pins P1.0-P1.7 P2.0-P2.5 Analog to Digital 10-bit 200-ksps Conversion Pins *I2C Communication *SPI Protocols *UART 1.8V – 3.3V Voltage Supply Power < 1mW Consumption
Logic Diagram Wind User Turbine Only Connect to Selected Start-up battery Mode Mode If Vbatt > 26.5V Solar All Off Only Mode TRUE FALSE Mode charge Disable Turbine battery connect to battery Enable Disable UC3906 UC3906 Turbine Keep Turbine connect voltage voltage to battery stable stable
Wind Turbine Control Inverter PV Panels Battery Lead-acid Bank battery charger Wind Turbine Transformer Main E Controller Rectifier Dump Load
PV Panel Control Inverter PV Panels Battery Bank Wind Turbine Transformer Main E Controller Rectifier Dump Load
Storage Unit Inverter PV Panels Battery Lead-acid Bank battery charger Wind Turbine Transformer Main E Controller Rectifier Dump Load
Storage Unit Lead-Acid Charging Stages 1 st Stage: Bulk 2 nd Stage: Absorption 3 rd Stage: Float
Load Distribution Inverter PV Panels Battery Lead-acid Bank battery charger Wind Turbine Transformer Housekeeping E Controller Rectifier Dump Load
Output Component Inverter Design: Aims PWRINV2.5K24 2500 Watt Parameter AIMS Max. Power 2.5kW Surge Power 5kW Wave Output Modify Sine Wave Operating Input VDC 20-30 Volts Full Load Efficiency 90% -15 ° C to 55 ° C Operating Temperature Weight 14 lbs Cost $280
Output Components AC-AC Transformer: SevenStar THG-1000 Parameter Dual Step Voltage Transformer Outlet 3 American Or 8 in 2 European Voltage Conversion 110V to 220V 220V to 110V Max. Power output 1000Watts Weight 17 lbs
Printed Circuit Board Schematic
Enclosure Enclosure box Add it when everything in it
Table of Contents 1. 1. Pr Proje oject ct Ov Over ervie view 2. 2. Revis vision ion A/B A/B 3. 3. Fin Final al Revis vision ion 4. 4. Time Time Lin Line e of of Pr Proje oject ct 5. 5. Gr Grou oup p Res espo pons nsib ibili ilities ties 6. 6. Fin Finan ancia cials ls
Andrea I2C User Interfacing Communication Juan Lead Acid Enclosure Battery Charger DC-DC Buck Manuel Voltage Storage System Regulators Randall Programming PCB Design Logic
Table of Contents 1. 1. Pr Proje oject ct Ov Over ervie view 2. 2. Revis vision ion A/B A/B 3. 3. Fin Final al Revis vision ion 4. 4. Time Time Lin Line e of of Pr Proje oject ct 5. 5. Gr Grou oup p Res espo pons nsib ibili ilities ties 6. 6. Fin Finan ancia cials ls
Time Line of Project January February March April March 2 nd – March 10 th April 1 st – April 9 th Jan 15 th - January 31 st Feb 1 st -February 15 th • SPRING BREAK • • Purchase IC • Prototype design Design prototype revision C devices March 11 th – March 30 th • • Design circuit Test prototype February 22 nd • Communication • • Keep research • CDR Presentation Purchase PCB • integrate circuits Successfully microcontroller Feb 23 rd – March 1 st troubleshooting communicating • Purchase PCBs • I2C code ready • Failed • Purchase communicating components
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