A SINGLE PHASING PROTECTION IN A 3 PHASE ELECTRIC MOTORS
USER'S INSTRUCTIONS: The project work you are about to view is on "a single phasing protection in a 3 phase electric motors". Please, sit back and study the below research material carefully. This project topic"a single phasing protection in a 3 phase electric motors"have complete 5(five) Chapters. The complete Project Material/writeup include: Abstract + Introduction + etc + Literature Review + methodology + etc + Conclusion + Recommendation + References/Bibliography.Our aim of providing this"a single phasing protection in a 3 phase electric motors" project research material is to reduce the stress of moving from one school library to another all in the name of searching for"a single phasing protection in a 3 phase electric motors"research materials. We are not encouraging any form of plagiarism. This service is legal because, all institutions permit their students to read previous projects, books, articles or papers while developing their own works.
TITLE PAGE
BY
---
--/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---
APPROVAL PAGE
This is to certify that the research work,"a single phasing protection in a 3 phase electric motors" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.
By
--- . ---
Supervisor Head of Department.
Signature………………. Signature……………….
……………………………….
---
External Invigilator
DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.
ACKNOWLEDGEMENT
The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.
PROJECT DESCRIPTION: This work"a single phasing protection in a 3 phase electric motors" research material is a complete and well researched project material strictly for academic purposes, which has been approved by different Lecturers from different higher institutions. We made Preliminary pages, Abstract and Chapter one of"a single phasing protection in a 3 phase electric motors"visible for everyone, then the complete material on"a single phasing protection in a 3 phase electric motors"is to be ordered for. Happy viewing!!!
Protection system is needed in every industry to avoid unwanted faults in the process components that may leads to excessive downtime and huge losses in terms of maintenance cost and loss of revenue. Protection of induction motor parameters under various operating conditions plays a vital role in its performance, reliability, efficiency and life cycle. This research focuses on the design of a system for measuring and monitoring of voltage, stator current and winding temperature of an induction motor under operation. The system also isolates the motor from the supply if threshold values are exceeded by using sensor technology with PIC18f4550 microcontroller. The hardware system was tested with a single phase induction motor. The results obtained show that the measured values conform to analog meters readings. The system adequately monitors and isolates the induction motor to prevent it from breaking down.
Keywords: Induction motor, Microcontroller, Monitoring, Protection, Sensor
TABLE OF CONTENTS
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
- PROBLEM STATEMENT
- AIM/OBJECTIVE OF THE PROJECT
- SCOPE / LIMITATION OF THE PROJECT
- APPLICATION OF THE PROJECT
- SIGNIFICANCE OF THE PROJECT
CHAPTER TWO
LITERATURE REVIEW
- OVERVIEW OF INDUCTION MOTOR
- BASIC PARTS OF AN INDUCTION MOTOR
- TYPES OF INDUCTION MOTORS
- ADVANTAGES OF INDUCTION MOTOR
- REVIEW OF RELATED STUDIES
CHAPTER THREE
METHODOLOGY
- BLOCK DIAGRAM
- VOLTAGE MEASUREMENT AND MONITORING
- CURRENT MEASUREMENT AND MONITORING
- TEMPERATURE MEASUREMENT AND MONITORING
- MEASUREMENT AND CONTROL SYSTEM DEVELOPMENT
- MEASUREMENT AND CONTROL SYSTEM IMPLEMENTATION
CHAPTER FOUR
4.1 RESULT AND DISCUSSION
CHAPTER FIVE
- CONCLUSION
- RECOMMENDATION
REFERENCES
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE STUDY
Induction motors are the most widely used electro-mechanical devices in a variety of applications and since the squirrel cage induction motor is low-priced, simple, robust, and rugged, it is considered worldwide as the workhorse in industrial applications (Chaturvedi, Akash, Mayank, and Sharif, 2014). Many researchers focused on condition monitoring of three induction motor components: the stator, rotor and bearings. Little attention has been paid to voltage unbalance in the motor supply and the development of induction motor parameters monitoring system (Mirabbasi, Ghodratollah, and Mehrdad, 2009).
Operation of induction motors at voltage and frequencies other than the nominal values, sudden increase in load or load thrown off can cause significant changes in the motor speed. Increase in speed leads to increase in operating temperature and decreases the functional horse power, which leads to reduced life of motor (Pari, Kavipriya, Naveenadevi, Preethi and Suryadharsini, 2017). Induction motor speed and temperature is more affected by high amplitudes of voltage fluctuations, whilst the torque and efficiency are more affected for middle and high amplitudes (Zhao, Ciufo and Perera, 2012).
A temperature protection system is needed to protect induction motor stator winding against thermal overloads in an application where induction motors are frequently started, overloaded and used in high inertia applications with long starting times (Aleksejs, 2015). Thermal overheating degrades the chemical stability of the materials used for stator winding insulation and accelerates the aging process. Unbalance voltage can occur due to Intermittent load or strong fluctuations in power demand, presence of larger single-phase consumers, (Zhao, Ciufo and Perera, 2012), presence of higher harmonics in the supply voltage (Miloje, 2012).
The present day requirement for ever increasing reliability of electrical machines is parameters monitoring and protection against variations. Though, it does not remedy the fault in most cases but early detection of variations in voltage, current and temperature and appropriate action would eliminate subsequent damage to motor, then reducing the cost of repair and downtime. The traditional measuring apparatus like meters cannot give a continuous measuring, monitoring and storing results of induction motor parameters (Shubhang and Rajesh, 2011).
Hence, a cost effective, reliable and accurate hardware system is designed to have a continuous monitoring of these parameters and protect against variation in voltage, current and temperature and isolate the induction motor from supply if the threshold value is exceeded.
1.2 PROBLEM STATEMENT
Induction motors are widely used in industrial, commercial and residential systems, because of their ruggedness, simplicity and relatively low cost. Approximately 65% of the electricity consumed in industry is used to drive electrical motors. Therefore, the efficiency and reliability of induction motors operation is of major importance, in order to improve the energy efficiency in industry (Quispe et al, 2011). Squirrel cage induction motors are the most important AC machines in industry. Low cost, high reliability, low inertia and high transient torque capacity are among the advantages of these motors. Many resources show that 35%–45% of motor failures are caused by stator insulation breakdown. For small induction machines, thermal overloading (which can cause high temperature), under or over voltage/current are causes of the induction motor stator winding insulation degradation process (Bonnett et al., 2012).
Thermal devices and models, which assume fixed thermal characteristics of the motor, are not capable of providing sufficient thermal protection since they have no means of giving a correct temperature estimate when the thermal characteristics change. Therefore, in order to extend the insulation life of the induction motor, it is critical to monitor the stator winding temperature, voltage, current and protect the motor under thermal overloading conditions such as motor stall, jam, overload, unbalanced operation, and situations where the cooling ability of the motor is accidentally reduced (Farag et al., 2014).
1.3 AIM AND OBJECTIVES OF THE STUDY
The main aim of this work is to build a system that will analyze and alarm an abnormality of the motor and prevent the damage in case of unbalance voltage or current and high temperature. The objectives of the study are:
- To protect induction motor from breaking down
- To build a protection and monitoring system for industrial induction motor
- To ensure safety of an induction motor.
- To improve the efficiency of the induction motor.
1.4 SCOPE / LIMITATION OF THE PROJECT
This work is on protection and monitoring system for industrial induction motor. This scheme can alert the operation of the motor in order to prevent damage and to extend the life time reducing maintenance costs. It consists of several sensor devices and coordinator device. The coordinator device reads sensor measured data which located in induction motor and transmits them to the LCD, mikroC source code for PIC libraries is the software used for data acquisition, conversion, communication and display.
Faults result in loses in the motor and also leads to increased electricity charges due to poor power factor, reduced efficiency, and power consumed. This paper is limited to motors operating directly on sinusoidal power and not through adjustable speed drives.
1.5 APPLICATION OF THE PROJECT
This device can be used in the following places:
- workshops
- industries
- electronics hobbyist, etc. for protecting, and monitoring of an AC motor
1.6 SIGNIFICANCE OF THE STUDY
This research work will throw more light on the best techniques for controlling and monitoring an induction motor. This study will also be designed to be of immense benefit to all the users of electric motor most especially in industries.
It will also serve as a guide to whoever that wants to purchase an induction motor.
Finally, it will also serve as a useful piece of information for both producers and users of electric motor.
CHAPTER FIVE
5.1 CONCLUSION
The developed measuring and monitoring system is simple and robust in design, it is reliable and cost effective. The system gave quick response to changes in monitored parameters. Relay activation when the threshold values are exceeded will improve the performance of the motor. The constant monitoring and measuring can produce data-base for scheduling of the motor servicing, troubleshooting and future reference; this results to an improved motor’s lifespan. The system can also be used for on-line condition monitoring and fault diagnosis of induction motor with the incorporated relay and alarm system.
5.2 RECOMMENDATION
The device has been designed, tested and system was able to respond to its operation. This work was built with quality wiring and contains many connections, I recommend that if failure occur, it should be troubleshoot by a qualify personnel along with the circuits diagram.
This project was built for Educational purposes. If one wants to use it for industrial or home applications, I recommend that a hook should be attached to the casing that would allow fixing the system on the wall.
Working on this topic as my project is a good idea and it comes at the right time. I am suggesting that this particular topic should also be given to other students both in higher and lower class.
CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of"a single phasing protection in a 3 phase electric motors" is also available. Order full work to download. Chapter two of"a single phasing protection in a 3 phase electric motors" consists of the literature review. In this chapter all the related work on"a single phasing protection in a 3 phase electric motors" was reviewed.
CHAPTER THREE: The complete chapter three of"a single phasing protection in a 3 phase electric motors" is available. Order full work to download. Chapter three of"a single phasing protection in a 3 phase electric motors" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.
CHAPTER FOUR: The complete chapter four of"a single phasing protection in a 3 phase electric motors" is available. Order full work to download. Chapter four of"a single phasing protection in a 3 phase electric motors" consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of"a single phasing protection in a 3 phase electric motors" is available. Order full work to download. Chapter five of"a single phasing protection in a 3 phase electric motors" consist of conclusion, recommendation and references.
To "DOWNLOAD" the complete material on this particular topic above click "HERE"
Do you want our Bank Accounts? please click HERE
To view other related topics click HERE
To "SUMMIT" new topic(s), develop a new topic OR you did not see your topic on our site but want to confirm the availiability of your topic click HERE
Do you want us to research your new topic? if yes, click "HERE"
Do you have any question concerning our post/services? click HERE for answers to your questions
For more information contact us through any of the following means:
Mobile No 
:+2348146561114 or +2347015391124 [Mr. Innocent]
Email address 
:engr4project@gmail.com
Watsapp No 
:+2348146561114
COUNTRIES THAT FOUND OUR SERVICES USEFUL
Australia, Botswana, Canada, Europe, Ghana, Ireland, India, Kenya, Liberia, Malaysia, Namibia, New Zealand, Nigeria, Pakistan, Philippines, Singapore, Sierra Leone, South Africa, Uganda, United States, United Kindom, Zambia, Zimbabwe, etc
Support: +234 8146561114 or +2347015391124
Watsapp No :+2348146561114
Email Address :engr4project@gmail.com
FOLLOW / VISIT US VIA:
