Download Poster - Senior Design

Introduction
In 2008 President Geoffrey introduced the Live Green Program which called for environmentally conscious living. In light of this
initiative, it was decided to actively assemble a wind turbine that would supply power to Coover hall and reduce our carbon
footprint. The previous group was able to purchase and design a working turbine system. Our goals where to add a user
interface, sensors for voltages, currents, and RPM, and to supply a working demonstration. For the interface, we decided to
use LabVIEW. This will display the currents, voltages, and powers for the entire system, as well as the RPM readings from the
turbine. The voltage sensor is a simple voltage divider. For the current sensors, we used current transformers to lower the
current to a lower level. The RPM sensor is a comparator circuit.. It uses infrared LEDs to for a transmitter and receiver. To
supply a working demonstration, we obtained a motor and a coupling to turn the turbine. It was decided because of budget
constraints not to place the turbine on the roof of Coover Hall. This decision meant we must properly simulate the wind
driving the turbine and study the characteristics of it.
Design Requirements
Functional Requirement
Turbine will output a DC voltage of 24VDC
Turbine’s output is 400W
Inverter supplies AC power to a load
Sensors are connected to a data acquisition device (DAQ), and displayed on a LabVIEW interface
Wind power is simulated with a motor coupled with the turbine
An adjustable power supply is used to vary motor’s input to turbine
Non-Functional Requirements
All components comply with state and federal electrical regulations
Interface
Built in NI LabVIEW
Displays DC currents, DC voltage, RPM of turbine, and
settings for adjustable power supply
Connects to NI 6008 DAQ and GPIB-USB
cable for input and output
 Built-in logic for controlling the charge of the battery bank
Testing
Individual
Sensors
Used power supplies, and oscilloscopes to ensure that sensors are working
RPM Sensor
LabVIEW side tested with signal generator
Hardware tested using LED at output, using reflective surface to ensure correct
operation
Adjustable Supply/AC Motor
PC and power supply were connected with GPIB-USB cable
Power supply settings tested using LabVIEW
Motor connected to supply, voltage and frequency set using PC
Interface
To test the display, we simulated a load using a DC source
Power output, voltage, and current levels were verified using the DC source
Subsystems
Motor/Turbine
Verified coupling between turbine and motor are secure
Measured output of turbine as motor turned rotor
Adjustable Supply/Turbine Characteristics
Studied relation between 3-phase motor voltage/frequency and turbine output
Develop relation that can be programmed through LabVIEW
Sensors & Interface
Using an multimeter and DC current sensors, verify that the interface is displaying the
correct values
RPM Sensor
Comparator design
Infra red LEDs are used to create pulse read into NI 6008 DAQ
Built-in 32 bit counter of DAQ is used
Computation of RPM done in LabVIEW
Reads from the coupling between motor and turbine
Entire System
Large Components/Control System/Interface
After installation is complete, ensure the system is working properly , safely, and as
expected
Motor Drive/Adjustable Supply
Kikusui PCR 6000W Adjustable Power Supply
3-phase AC motor
Power supply connected using GPIB-USB cable
Voltage and frequency of supply are set using LabVIEW Interface
Project Hours and Cost
Hours
23%
28%
Brandon
Kenny
22%
27%
Hassan
Elsammani
Item
Coupling
Current Transducer
Stop Switch
Display Materials
Kikusui Power Supply
3-phase AC Motor
Total
Cost
$112
$21
$16
$15
$0
$0
$164
Summary
Team:
May1017
Website: http://seniord.ece.iastate.edu/may1017/
E-mail: [email protected]
Advisor:
Dr. Ajjarapu
Team Members:
Elsammani Ahmed
Hassan Burawi
Brandon Janssen
Kenneth Thelen
(EE)
(EE)
(EE)
(EE)
Wind energy is a crucial energy needed for the future. Wind is the cornerstone of renewable energy in this
country. This project is our way of demonstrating how wind can be harnessed to produced clean energy
along with a working interface to display properties of the system. With this project students will be able to
see the output of this system on a minute to minute basis to perform experiments or to observe how great
wind energy can be. It was also a study of how having certain control aspects of a turbine (mainly pitch
control) can increase the Special thank you to our Zhongjian Kang, Lee Harker, Jason Boyde, and Dr.
Ajjarapu for providing materials, advice, and help with our project.