WINDMILL (NO GEARBOX): CDRSCOTT STRYCKER

KOOSHA DANESHI

IAN NELSON

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

WORK BREAKDOWN STRUCTURE

GANTT CHART

LEVEL TWO FUNCTIONAL DECOMPOSITION

The Generator

120V 2500RPM 60W Generator (Ideal Values)

1000 rpm 25 W 50 V .5 A

2000 rpm 50 W 100 V .5 A

2500 rpm 60 W 120 V .5 A

3000 rpm 75 W 150 V .5 A

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

SCHEMATIC

● Red = Positive/Hot● Black = Negative/GND● Blue = Control

.11Ω

Voltage Regulator: LM2576HVT Assembly

RISK MITIGATION PLANRisk 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 ShockAll components need to be set up in a

way that electrical shock is not a possibility

N/A

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.

N/A 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

N/A

Have talked with both other team and the mechanical shop in order

to get an idea of what needs to be done

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.

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.

Testing Setup

.11Ω

Questions????????????