1. WINDMILL (NO GEARBOX): CDR
SCOTT STRYCKER
KOOSHA DANESHI
IAN NELSON

2. Project Objectives/Milestones
Build the controls behind a windmill generator to output 10 W
Include both automatic and manual safety switches
Be able to electrically brake the system

3. WORK BREAKDOWN STRUCTURE

4. GANTT CHART

5. LEVEL TWO FUNCTIONAL DECOMPOSITION

6. 120V 2500RPM 60W Generator (Ideal Values)
The Generator
120V 2500RPM 60W Generator (Ideal Values)
1000 rpm
25 W
50 V
.5 A
2000 rpm
50 W
100 V
2500 rpm
60 W
120 V
3000 rpm
75 W
150 V

7. Software
Relay Code
Controls both the startup relay and the E-Brake relay
Frequency Detection
Measures the frequency of the generator to determine RPM
Will be used to control both the start up and the shut down
Load Detection
Monitors if the load has been removed
If it has, the E-Brake program will be activated
Manual Safety Switch
Activates the E-Brake if the manual switch has been pressed

8. SCHEMATIC
.11Ω
Red = Positive/Hot
Black = Negative/GND
Blue = Control

9. Voltage Regulator: LM2576HVT Assembly

10. RISK MITIGATION PLAN Risk Ways to Avoid Plan B Notes
Trouble Getting Time in the Wind Tunnel
Plan Testing Days far ahead of Time
A Drill can be used in place of the rotors to simulate wind
Drill in conjunction with a tacheometer has been used effectively in testing thus far
Programming Arduino (Experience Arduino Programming is Low)
Start working on the programming during the CDR
N/A
Well over half of the programming is already done. The rest requires some of the data gained from testing.
Electrical Shock
All components need to be set up in a way that electrical shock is not a possibility
Instead of using IGBTs as previously designed, the design instead calls for relays which isolate the arduino from the high voltage components
Frying the Arduino
This is a problem that is possible, but not probable. By using a capacitor as a dc block at the frequency detection and using a small enough resistor at the load detection, the arduino should be protected.
Placement of the sensors and the components around them have been chosen in order to protect the Arduino
Creating the Base
Need to Give Enough time to Create the Base
Have talked with both other team and the mechanical shop in order to get an idea of what needs to be done

11. Other Challenges
Need to either build the circuit on a protoboard or a milled board, depending on the time
Acheiving a stable reading from the frequency code.

12. Testing Plan
Find the Correlation Between Frequency and RPM/ Wind Speed
Can be accomplished in lab using the drill and a homemade optical tachometer
Load Removal Test
The load removal detection circuit is simply a resistor in series with the load. When the load is removed, no current will reach the resistor. The sensor will simply be measuring the voltage across the resistor. This can be tested in lab by removing the load and ensuring that the system brakes.
Startup and shutdown testing will be tested first in lab and then moved to the wind tunnel to ensure proper working order under real wind speeds.
To test power, a multimeter will be put in series with the load. Using both the in lab drill and the wind tunnel, the current will be multiplied by 5 V to find the power that is being delivered to the load.

13. Testing Setup
.11Ω

14. Questions????????????