CONSTRUCTION OF 1.5KVA POWER INVERTER WITH 12V/100AH BATTERY
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TITLE PAGE
BY
---
--/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---
DECEMBER,2018
APPROVAL PAGE
This is to certify that the research work, "construction of 1.5kva power inverter with 12v/100ah battery" 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.
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This project is titled the design and construction of a DC to AC inverter system. It is designed to meet up with the power demand in the offices and in homes in the absence of power supply from the national grid. In order words the device / item serves as a substitute for national grid which almost monopolises the power supply to people.
It is designed in such a way that it will take up 12v DC from battery (12V/100AH) and inverts it to an output of 230v, 50Hz AC. It makes no noise during operation and no hazardous carbon monoxide is generated in the surrounding.
This is a feature that makes it safe to use any where when compared to generator. Also, the circuit is capable of charging the battery (i.e 12v source) when the power from the supply authority is on. This greatly reduces the cost of operation of the system.
This work is aimed at designing a 1kva modified sine wave inverter with battery that can be used to power appliances both in homes and industries.
TABLE OF CONTENTS
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWLEDGEMENT
ABSTRACT
TABLE OF CONTENT
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
1.2 PROBLEM STATEMENT
1.3 OBJECTIVE OF THE PROJECT
1.4 SIGNIFICANCE OF THE PROJECT
1.5 SCOPE OF THE PROJECT
1.6 ADVANTAGES OF THE PROJECT
1.7 LIMITATION OF THE PROJECT
1.8 PURPOSE OF THE PROJECT
1.9 METHODOLOGY
1.10 PROJECT ORGANISATION
CHAPTER TWO
2.0 LITERATURE REVIEW
2.1 REVIEW OF THE STUDY
2.2 REVIEW OF THE RELATED STUDIES
2.3 HISTORICAL BACKGROUND OF AN INVERTER
2.4 HOW TO CHOOSING THE RIGHT INVERTER
2.5 REVIEW OF THE DIFFERENCE BETWEEN SINE WAVE AND MODIFIED SINE WAVE INVERTER.
2.6 REVIEW OF INVERTER CAPACITY
2.7 SAFETY OF INVERTER
2.8 INVERTER RATING
2.9 WHY CHOOSE A MODIFIED SINE WAVE INVERTER?
CHAPTER THREE
3.0 METHODOLOGY
3.1 BASIC DESIGNS OF AN INVERTER
3.2 BLOCK DIAGRAM OF THE SYSTEM
3.3 SYSTEM OPERATION
3.4 CIRCUIT DIAGRAM
3.5 CIRCUIT DESCRIPTION
3.6 DESCRIPTION OF COMPONENTS USED
3.7 HOW TO CHOOSE A RIGHT INVERTER AND BATTERY
3.8 HOW TO CHOOSE THE BEST INVERTER BATTERY
CHAPTER FOUR
RESULT ANALYSIS
4.0 CONSTRUCTION PROCEDURE AND TESTING
4.1 CASING AND PACKAGING
4.2 ASSEMBLING OF SECTIONS
4.3 TESTING OF SYSTEM OPERATION
4.4 COST ANALYSIS
CHAPTER FIVE
5.0 CONCLUSION
5.1 RECOMMENDATION
5.2 REFERENCES
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
A power inverter converts DC power (also known as direct current), to standard AC power (alternating current). Inverters are used to operate electrical equipment from the power produced by a car or boat battery or renewable energy sources, like solar panels or wind turbines. DC power is what batteries store, while AC power is what most electrical appliances need to run so an inverter is necessary to convert the power into a usable form. For example, when a cell phone is plugged into a car cigarette lighter to recharge, it supplies DC power; this must be converted to the required AC power by a power inverter to charge the phone.
In modified sine wave, The waveform in commercially available modified-sine-wave inverters is a square wave with a pause before the polarity transition, which only needs to cycle through a three-position switch that outputs forward, off, and reverse output at the pre-determined frequency. The peak voltage to RMS voltage does not maintain the same relationship as for a sine wave. The DC bus voltage may be actively regulated or the "on" and "off" times can be modified to maintain the same RMS value output up to the DC bus voltage to compensate for DC bus voltage variation.
The ratio of on to off time can be adjusted to vary the RMS voltage while maintaining a constant frequency with a technique called PWM. Harmonic spectrum in the output depends on the width of the pulses and the modulation frequency. When operating induction motors, voltage harmonics is not of great concern, however harmonic distortion in the current waveform introduces additional heating, and can produce pulsating torques.
1.2 PROBLEM STATEMENT
If there is one factor that has perpetually maintained the status of Nigeria as a less developed country, it is its electricity sector. Till date, many households and industrial businesses cannot be guaranteed of 24 hours supply of electricity from the National grid. At this stage of Nigeria’s social and economic development, the country cannot deliver sufficient energy to the citizens despite huge financial resources that have been expended in the sector.
Rather, Nigerians have continued to rely on electricity generators for their power supply, fuel marketers are taking significant portion of households’ institutions of learning and businesses’ incomes to supply power, noise pollution from regular humming generators have become integral part of living for many Nigerians with imaginable consequences on their health. Because of these problems, there is a need to design and construct an inverter to complement or augment the electricity supply from the National grid, reduce cost of energy consumed and eliminate noise/environmental pollution that is associated with running of generator.
1.3 OBJECTIVE OF THE PROJECT
The main aim of this project is to build a power inverter which can be powered from the source of 12V/100Ah battery to produce an output of 230vac. The objectives of the work are:
i. To build system prototype
iii. To back-up the erratic power supply by PHCN.
iv. To ensure the protection of the back-up source consumer equipment and supply.
v. To be able to connect 12v/100Ah battery to the inverter.
1.4 PURPOSE OF THE PROJECT
The purpose of this work is to build an electronic power generating device that is independent on the mains supply that changes direct current (DC) to alternating current (AC) which can go a long way ensuring uninterruptible power supply.
1.5 SIGNIFICANCE OF THE PROJECT
The inverter battery is the second most significant (and second most expensive) component of a system. It’s important because it converts the raw Direct Current (DC) power that is produced by battery into Alternating Current (AC) power that comes out of the wall sockets outlet. Inverters also have technology that maximizes the power output of that DC energy.
Secondly, the whole energy conversion process is environmentally friendly. It produces no noise, harmful emissions or polluting gases. The burning of natural resources for energy can create smoke, cause acid rain and pollute water and air. Carbon dioxide, CO2, a leading greenhouse gas, is also produced in the case of burning fuels. inverter uses only the power of the battery as its fuel. It creates no harmful by-product and contributes actively to the reduction of global warming.
1.6 SCOPE OF THE PROJECT
The scope of this work covers building a power conversion device. It converts fixed direct current (DC) voltage to frequency sinusoidal alternating current (AC) voltage output. The input voltage (12vdc), output voltage (230vac) and frequency (50hz), and overall power handling depend on the design of the specific device or circuitry. The inverter does not produce any power; the power is provided by the DC source.
A typical power inverter device or circuit requires a relatively stable DC power source capable of supplying enough current for the intended power demands of the system. The input voltage depends on the design and purpose of the inverter.
The waveform of this work is modified sine wave. The modified sine wave output of such an inverter is the sum of two square waves one of which is phase shifted 90 degrees relative to the other. The result is three level waveform with equal intervals of zero volts; peak positive volts; zero volts; peak negative volts and then zero volts. This sequence is repeated. The resultant wave very roughly resembles the shape of a sine wave.
1.7 ADVANTAGES OF THE PROJECT
Power inverters are used to power and control the speed, torque, acceleration, deceleration, and direction of the motor. The use of inverter has become prevalent in wide range of industrial applications; from motion control applications to ventilation systems, waste water processing facilities to machining areas, and many others. Though power inverters offer lower operating costs and higher efficiency, they are not without their problems.
1.8 LIMITATION OF THE PROJECT
- Expensive when compared to traditional generators
- There are no large capacity inverter in the markets
- The inverter can power a few appliances for a short period
- The input is limited to 12VDC, output to 230VAC, the frequency to 50Hz and the battery current per hour to 100Ah
- The power rating of the work is 1.5kva
1.9 METHODOLOGY
To achieve the aim and objectives of this work, the following are the steps involved:
- Study of the previous work on the project so as to improve it efficiency.
- Draw a block diagram.
- Test for continuity of components and devices,
- Design and calculation for the device was carried out.
- Studying of various component used in circuit.
- Construction of the circuit was carried out.
- Finally, the whole device was cased and final test was carried out.
1.10 PROJECT ORGANISATION
The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.
CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "construction of 1.5kva power inverter with 12v/100ah battery" is also available. Order full work to download. Chapter two of "construction of 1.5kva power inverter with 12v/100ah battery" consists of the literature review. In this chapter all the related works on "construction of 1.5kva power inverter with 12v/100ah battery" were reviewed.
CHAPTER THREE: The complete chapter three of "construction of 1.5kva power inverter with 12v/100ah battery" is available. Order full work to download. Chapter three of "construction of 1.5kva power inverter with 12v/100ah battery" 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 "construction of 1.5kva power inverter with 12v/100ah battery" is available. Order full work to download. Chapter four of "construction of 1.5kva power inverter with 12v/100ah battery" consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of "construction of 1.5kva power inverter with 12v/100ah battery" is available. Order full work to download. Chapter five of "construction of 1.5kva power inverter with 12v/100ah battery" consist of conclusion, recommendation and references.
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