Construction of a 12 Volts DC Fan Controller

Abstract

This project work was embarked on the construction and determination of the efficiency of 12 volts DC fan using two N3055 transistor, 1kΩ variable resistors, resistors, breadboard, veroboard, 12 volts DC battery and connectors at Science Laboratory Technological Department, Federal Polytechnic Offa, Nigeria. This is always required to minimize, control or totally eliminate the power fluctuations received at the load end or consumer end that usually lead to the reduction of DC fan lifespan. With the constructed DC fan, measurements were carried out using 25 volts adjustable DC regulated power supply system to feed in variable voltage and determine the output voltage and current to calculate its efficiencies at different resistance. The efficiencies determined at different resistance were compare and contrast. The threshold voltage was also determined at a particular resistance. Therefore, its uses require adequate knowledge of threshold and steady voltage to keeps it working at its highest efficiency that can make it more durable and increase its lifespan. Hence, the result of this project work recommends constant power source with steady input voltage above its threshold voltage to keeps the regulator working at its highest efficiency that can make it more durable and increase its lifespan. 

Table of Content

Title pagei

Certification ii

Dedication iii

Acknowledgementsiv

Abstract vi

CHAPTER ONE: INTRODUCTION

1.1Background of Study 1

1.2Statement of Problems3

1.3Aim and Objectives3

1.4Significance of Study4

1.5Definition of Terms4

CHAPTER TWO: LITERATURE REVIEW

2.1Historical Background6

2.2Major Components Required for DC Fan Regulator7

2.3Roles of Speed Control (IREA, 2016)9

2.4Methods of Speed Control (Ellis et al., 2001)11

2.5LM317 Voltage Regulator16

CHAPTER THREE: METHODOLOGY

3.1Study Area20

3.2Prototype Design21

3.3Procedures for Construction of 12 Volt Fan Regulator21

3.4Testing for the Continuity 22

3.5Experimentation22

3.6Efficiency and Performance Evaluation22

CHAPTER FOUR: RESULTS AND DISCUSSION

4.1Results24

4.2Discussion of Results37

CHAPTER FIVE:  CONCLUSION AND RECOMMENDATION

5.1Conclusion38

5.2Recommendation39

References40