1. Battery Box Project (Group #19) PRASH RAMANI MARCOS RIVED MARTIN

2. INTRODUCTION Many places do not have reliable access to power grid Wind power is cheap/available everywhere Converting wind energy into energy people can use safely

3. OBJECTIVES 3-phase AC power to single phase DC power Store in a 12V Lead-Acid Battery Power electronics (lights, computers) and charge devices (cell-phones, tablets) Keep entire design cheap, efficient, and safe

4. INITIAL CHALLENGES High power Safe battery charging methods Keeping costs low Keeping design modular

5. BLOCK DIAGRAM

6. RECTIFIER

7. Wind Turbine: 3-phase AC. 15 Volts RMS Phase- Phase Need single phase DC Expected output: 21V single phase DC

8. EXPECTATIONS

9. SCHEMATIC

10. RESULTS (I) -22.20 V -20.20 V -21.0 V

11. RESULTS (II) 45.048 W 16.498 W

12. DC-DC CONVERTER

13. Battery needs 12V-15V to properly charge Expected output: 15V DC Governed by iterative control from Microcontroller

14. SCHEMATIC

15. FLOW CHART

16. RESULTS WITH 20 V OUTPUT 15.128V

17. RESULTS WITH 17 V INPUT 15.051V

18. EFFICIENCY CALCULATION

19. CHARGING IC

20. Battery requires Constant Voltage/Constant Current Charging method LT1513 Charging IC administers proper charging for SLA Expected output: 15V, 1.25A Source: BatteryUniversity.com

21. SCHEMATIC Source: LT1513 Data Sheet

22. INVERTER

23. Full-bridge inverter 12 V DC to 12 V RMS AC Transformer 12-110 V AC

24. SCHEMATIC

25. RESULTS +11.781V -11.825V

26. USB PORTS AND GAUGE 12.5 V

27. SUCCESSES Functioning Rectifier Functioning DC-DC Converter with control implementation Functional Rectifier + DC-DC Converter in tandem Inverter Circuit Measuring Charge Level Operational USB ports from Battery

28. SHORTCOMINGS Charging the 12V Battery Transformer implementation at Inverter output All modules working together

29. FURTHER WORK Relay implementation for battery Better/more portable form factor PI control instead of iterative control (Efficiency)

30. CREDITS Mr. Kevin Colravy Mr. Zitao Liao Ms. Katherine O’Kane Mr. Jackson Lenz The rest of the Senior Design staff