1. HydroFly: Fuel Cell Group Group Members: -Adam Lint -Chris Cockrell -Dan Hubbard Sponsors: -Dr. Herb Hess -Dr. Brian Johnson

2. Two Groups: -Flywheel -Fuel Cell HydroFly: Flywheel Group Group Members: -Gavin Abo -Nate Stout -Nathan Thomas

3. Design Review II: Final Design Review Outline Project Objectives Project Introduction Project Status Design Description and Functionality -DC/DC Converter -Inverter -Transformer -Control -Software -Zero Crossing Detection Schedule Budgeting Questions

4. Primary Objectives -Interface a Fuel Cell to the AMPS. -Provide power to the AMPS

5. Secondary Objectives -Produce an Operation Manual -Protect the Fuel Cell and Interface -User Safety

6. Introduction Why are we interfacing the Fuel Cell to the Analog Model Power System? -Alternative Energy Source -Flexibility for the AMPS

7. Functional Specs The specifications for the interface are the following: 18-36V DC input from the Fuel Cell Output 208 +/- 2 % V AC (L-L 3-phase) Output Voltage at 60Hz +/- 0.05Hz Max power flow of 200W for the interface

8. Overall System Layout -DC/DC Converter -Inverter -Transformer -Control -Software -Zero Crossing Detection

9. Overall System Layout -DC/DC Converter -Inverter -Transformer - Control -Software -Zero Crossing Detection

10. Control What does the Control do? -Produces PWM -Synchronizes AC Systems -Controls Power Flow -Protects Fuel Cell and Interface -Monitors Zero Crossings -Calculations

11. How are these tasks accomplished? -DSPTMS320LF2401A TI

12. PWM Seven 16-Bit Pulse-Width Modulation (PWM) Channels Which Enable: - Three-Phase Inverter Control

13. Synchronize AC Systems -Magnitude -Frequency -Phase/Zero Crossings (30 degrees ahead)

14. Power Flow P = |Vfc||Vamps|sin(δ) X L=181 mH Q = |Vfc||Vamps|cos(δ) X -|Vamps|^2 X

15. Protects Fuel Cell and Interface Checks for undesired operation conditions -PW on Zero Crossing -Frequency variation -Voltage differences

16. Other DSP tasks -Monitors Zero Crossings -Calculations

17. Overall System Layout -DC/DC Converter -Inverter -Transformer -Control - Software -Zero Crossing Detection

18. Software