1. Senior Design May 2011-01 Team Andrew Nigro (EE) Chad Hand (EE) Luke Rupiper (EE) Ryan Semler (EE) Shonda Butler (EE) Advisor: Venkataramana Ajjarapu

2. The objective of the senior design project is to simulate an environment in which a wind resource provides renewable energy. The electricity generated from the wind turbine can be used to power a direct load and potentially be integrated into the Iowa State University power grid.

3.  Problem: ◦ Previously the motor and wind turbine were coupled together on separate mounting systems. Issues we experience with this system include bowing wood, wind turbine movement during operation, and inaccurate coupling height.

4.  3 Design Alternatives ◦ A full wood design (3/4” birch plywood vs. 3/4” Medium Density Fiberboard)  Birch Plywood – Dense, sturdy but pricey  MDF – Dense, less flexible and susceptible to vibration, but can crack without proper bracing ◦ A wood base with extruded aluminum mounting  Two aluminum rods braced and connected to the wood mounting board go up directly to the face of the turbine to hold it in place.  An extruded aluminum mounting box braced and connected to the wood matches up to the two rods bracing the turbine. ◦ A wood base with extruded aluminum + wood board mounting  Two aluminum rods braced and connected to the wood mounting board, go up directly to the face of a board that is connected to the face of the turbine to hold it in place.  An extruded aluminum mounting box braced and connected to the wood matches up to the two rods bracing

5.  Materials: ◦ 3x M5x35 SS socket Head Screws ~ $3 ◦ Extruded aluminum mounting brackets ~$50 ◦ L brackets ~ $10 ◦ ¾” MDF or Birch Plywood sheet ~ $25 ◦ Round rubber gasket ~ $5 ◦ 1 ½” Schedule 40 Steel Conduit – Grounded as per NEC 250.52, item 5 and NEC 250.53, item A ~$5 ◦ Total Cost ~ $98

6.  Reed Sensor  Hall Sensor -Physical switch -On/Off digital output -fragile -higher cost -Magnetic sensor -Linear analog output -Prepackaged circuit -Lower cost

7. - Digital output - Powered by DAC - Switching speed up to 10kHz - Prefabricated mounting holes - Long leads

8. RPM Readings Front Panel Initial Settings: Initial Count Count Direction Edge Displays: Elapsed Time RPM measurement Numeric Data Block Diagram Data from DAQ is used as an input. Uses a counter with conditional loops and several mathematical blocks for computing RPM

9.  Senior Design Team SD Dec10-05 is completing their ridgeline meteorological sensor network ◦ Self-healing mesh network consists of 3 nodes where each node includes:  Anemometer  Wind vane  Arduino microcontroller  PCB to bring the elements together  Wireless transceiver using a Xbee-Pro DigiMesh module and Conductive Sleeve Dipole VS Whip Antenna ◦ These nodes will be placed on the roofs of Coover and Durham in order to get the actual wind profile (speed and direction) here on campus ◦ Real-time data is collected in 1-3 second resolution in a datalogger, averaged on 10 second intervals and transmitted through a transceiver with a range of 1-2 km ◦ We will be provided with a transceiver in order to join the network ◦ Data will be logged in a text file that we can use to export data as needed

10.  Data collected from the wind sensors will be displayed in a text file  LabVIEW can import this data by analyzing each line and then separating the values as shown below

11.  MATLAB can also import the same data provided to LabVIEW from the text file in order to graphically display the wind profile % Import the file newData1 = importdata(fileToRead1); %Break the data up into a new structure with one field per column. colheaders = genvarname(newData1.textdata); for i = 1:length(colheaders) dataByColumn1.(colheaders{i}) = newData1.data(:, i); end % Create new variables in the base workspace from those fields. vars = fieldnames(dataByColumn1); for i = 1:length(vars) assignin('base', vars{i}, dataByColumn1.(vars{i})); end

12. User interface for manual control of Power supply Use knob to control input voltage. Program balances phase with input voltage to adjust frequency Plan to make process automated based on input wind profile from wind sensors.

13. Block Logic of motor control using LabVIEW 9.0 Plan to have separate input block that uses data from wind sensor to control motor speed.

14. Turbine & Battery Readings Front Panel Turbine/Battery Measurements: Voltage Current Power Other Measurements: Total Power Block Diagram Various blocks for computing turbine/battery voltage, current, power, and overall total power

16.  Slide 3 Images: ◦ Left(Picture Courtesy of SDMay10-17)  Slide 5 Images: ◦ Left(http://www.cs.cmu.edu/~garthz/blog/80-20- parts/flange_screw_interference.jpg)http://www.cs.cmu.edu/~garthz/blog/80-20- parts/flange_screw_interference.jpg ◦ Right(http://www.aluminum-profiles.com/products/aluminum_extrusion.htm)http://www.aluminum-profiles.com/products/aluminum_extrusion.htm  Slide 6 Images: ◦ Left(http://www.chicagosensor.com/images/HowItWorksReed.jpg)http://www.chicagosensor.com/images/HowItWorksReed.jpg ◦ Right(http://upload.wikimedia.org/wikipedia/commons/7/7e/Hall_sensor_tach.gif)http://upload.wikimedia.org/wikipedia/commons/7/7e/Hall_sensor_tach.gif  Slide 7 Image: ◦ http://media.digikey.com/photos/Hamlin%20Photos/55100-3H-02-A.jpg http://media.digikey.com/photos/Hamlin%20Photos/55100-3H-02-A.jpg  Slide 9 Images: ◦ Left(http://www.nrgsystems.com/~/media/ProductImages/1900/1900.ashx)http://www.nrgsystems.com/~/media/ProductImages/1900/1900.ashx ◦ Right(http://www.nrgsystems.com/~/media/ProductImages/1904/1904.ashx)http://www.nrgsystems.com/~/media/ProductImages/1904/1904.ashx  Slide 10 Image: ◦ http://forums.ni.com/ni/attachments/ni/170/236901/1/read%20lines.JPG http://forums.ni.com/ni/attachments/ni/170/236901/1/read%20lines.JPG  Slide 11 Image: ◦ http://www-bml.ucdavis.edu/boon/images/qa_WindSpeed.gif http://www-bml.ucdavis.edu/boon/images/qa_WindSpeed.gif