PAYKEL MOTOR AS ALTERNATOR FOR A 200 WATT PICO- HYDRO
POWER SUPPLY SYSTEM
ATHENA PEREJAN LAVEGA
2004-68278
SUBMITTED TO THE FACULTY OF THE
COLLEGE OF ENGINEERING AND AGRO-INDUSTRIAL TECHNOLOGY, UNIVERSITY OF THE PHILIPPINES LOS BAÑOS,
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF
BACHELOR OF SCIENCE IN ELECTRICAL ENGINEERING
OCTOBER 2009
The report attached hereto entitledEvaluation of a Fisher and Paykel Motor as Alternator for a 200 watt Pico-Hydro Power Supply System, prepared and submitted by Athena P. Lavega in partial fulfillment of the requirements for the degree of Bachelor of Science in Electrical Engineeringis hereby accepted.
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Prof. Noah G. Badayos Engr. Ericson B. Poja Engr. Billy Jonh Q. Valdez
Panel Member Panel Member Panel Member
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Date Signed Date Signed Date Signed
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Prof. Roderick L. Catriz Academic Adviser
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Date Signed
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Prof. Roderick L. Catriz Chairman
Department of Electrical Engineering
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Date Signed
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Dr. Arsenio N. Resurreccion Dean
College of Engineering and Agro-Industrial Technology UPLB
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Date Signed
TABLE OF CONTENTS
Biographical Sketch iii
Acknowledgement iv
Table of Contents vi
List of Figures viii
List of Tables ix
Abstract x
I. Introduction 1
A. Description of the Study 2
B. Significance of the Study 3
C. Objective of the Study 5
D. Scope and Limitation 5
E. Date and Place of Study 6
II. Review of Literature 7
A. Hydropower Systems 8
B. Electrical Machines 8
B.1. Types of Electrical Machines 9
B.2. Electric Generators 10
C. Synchronous Generators 10
C.1. Types of Synchronous Generators 11
C.2. Permanent Magnet Synchronous Generators 12 D. Parameters Used in Analyzing Synchronous Generators 14
E. Importance of Renewable Energy Systems 15
III. Materials and Methodology 18
IV. Results and Discussions 22
A. Existing Parameters of the Fisher and Paykel Motor 23
B. Motor Used as a Generator 25
B.1. No-load Behavior of the Generator 26
B.2. Behavior of the Generator with Load 29
B.2.1 At Rated Frequencies 29
B.2.2 At Varying Speeds 31
C. Identified Generator Parameters that Needs Improvement 34
D. Design Modifications 35
D.1. Voltage 36
D.2. Current 37
D.3. Frequency 38
E. Proposed Modifications 38
V. Conclusion 41
VI. Recommendation 43
Literature Cited 45
Appendices 48
LIST OF FIGURES
Figure No. Description Page
1. No-Load Set-up 20
2. Loaded Set-up 21
3. Auxiliary View of the Alternator Prototype 26 4. Voltage Regulation Trend at Varying Speed 34 5. Original Connection of the Inductors in the 3ΦMotor 39 6. Possible Connection of the Armature Connections 39 7. Block Diagram of the Proposed Connections 40
LIST OF TABLES
Table No. Description Page
1. Existing Permanent Magnet Motor Parameters 24 2. No-Load Characteristics of the Generator 27
3. Percent error of voltage and frequency 28
4. Voltage Regulation of the Generator at 50 Hz and 60 Hz 30 5. Current, Power, Speed and Frequency of the Generator at
50 Hz and 60 Hz
31
6. Output Power, Current and RMS Voltage of the Generator at 50 Hz and 60 Hz
31
7. Current, RMS Voltage, Power, Speed and Frequency of the Generator at 50 Hz and 60 Hz
33
8. Voltage Regulation of the Generator at 81.67 Hz 34
LAVEGA, ATHENA PEREJAN, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, November 2009, Evaluation of a Fisher and Paykel Motor as Alternator for a 200 watt Pico Hydro Power Supply System.
Adviser: Prof. Roderick L. Catriz
ABSTRACT
Energy is an important commodity in our current generation. There are currently many available sources of it, but considering the current decline of the environment’s condition one must consider the environmental impact of the energy sources. With this mind set, renewable energy systems are a popular field of study, of which hydro power supply systems are the oldest and one of the most used technology. At present hydro power supply systems are being scaled down to smaller levels to make it more available to more people. Though the endeavor be far from actually attaining perfectly clean energy, it is should be a common goal to improve these systems. One important aspect in improvement is the generator.
A Fisher and Paykel motor was converted to a generator and is evaluated if it can be a suitable alternative generator for a 200 W pico hydro power supply system. It was evaluated based on parameters such as voltage, current, power and frequency. From the previous motor ratings the rated speed and other important values were derived. Two set- ups were made to evaluate the generator. The no-load set-up shows that the converted motor behaves much like ordinary synchronous generators but the measured frequency is almost three times higher than the computed one. When the generator was connected to a load, it showed that the generator is able to produce 220 V at its rated speed, but it is not able to provide 200 W. It was seen from the data that in order to get the desired power of 200 W the generator must be ran at more or less 700 rpm.
The generator in its unmodified form is already sufficient for a 200 W system. But, since it produces very low values of current and its measured frequency is way higher than its supposed value, additional installations to the generator such as a frequency converter, voltage regulator and current transformer can be employed to improve the set- up.
