Design And Construction Of A 1.5KVA Hybrid Powered Modified Sine Wave Modular Inverter Trainer Kit

ABSTRACT

A training device for instructing students in inverter circuits, which includes a large flat panel that is vertically disposed for visual display before the students, locations on the front surface of the panel for attachment of digital devices, `a number of digital-logic circuit devices having means for both mechanical and electrical connection to the panel, a power circuit associated with the panel for energizing the electronic devices, and circuit connections for making selected logical circuit interconnections between the digital-logic devices displayed on the panel.

This invention relates to trainers and more particularly is concerned with a trainer capable of displaying digital devices operative connected in a circuit configuration which precisely duplicates the schematic diagram of the circuit under consideration.

The primary objective is to design an inexpensive, simple to use device that could be retained by students, so that they can undertake digital experimentation.

 TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

CHAPTER ONE

INTRODUCTION

1.1      BACKGROUND OF THE PROJECT

• AIM OF THE PROJECT
• OBJECTIVE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• SCOPE OF THE PROJECT
• APPLICATION OF THE PROJECT

CHAPTER TWO

LITERATURE REVIEW

• REVIEW OF DIFFERENT POWER ELECTRONICS TRAINER KIT
• HISTORICAL BACKGROUND OF AN INVERTER
• HOW TO CHOOSING THE RIGHT INVERTER
• REVIEW OF THE DIFFERENCE BETWEEN SINE WAVE AND MODIFIED SINE WAVE INVERTER
• REVIEW OF INVERTER CAPACITY
• SAFETY OF INVERTER
• INVERTER RATINGS
• WHY CHOOSE A MODIFIED SINE WAVE INVERTER?
• TYPES OF INVERTER

CHAPTER THREE

SYSTEM DESIGN METHODOLOGY

• SYSTEM COMPONENTS
• LIST OF TOOLS
• SYSTEM DIAGRAM
• SYSTEM COMPONENTS
• OPERATION OF THE SYSTEM
• BLOCK DIAGRAM
• DESCRIPTION OF SYSTEM BLOCK
• HOW TO CHOOSE A RIGHT INVERTER

 CHAPTER FOUR

TESTING AND RESULTS

• CONSTRUCTION PROCEDURE AND TESTING
• INSTALLATION OF THE COMPLETE DESIGN
• ASSEMBLING OF SECTIONS
• TESTING OF SYSTEM OPERATION
• COST ANALYSIS

CHAPTER FIVE

• CONCLUSION
• RECOMMENDATION
• REFERENCES

 CHAPTER ONE

1.0                                                          INTRODUCTION

Power Electronics is one of a key subject of electrical engineering. Power electronics is of vital importance to understanding of control, conversion and conditioning of power in electrical industries. The power electronics laboratory is actively engaged to reinforce and enhance understanding of the fundamentals of semiconductor switches and power converters. This laboratory deal with practical realization of theory concept related with power electronics. The all experimental set-ups are designed and developed by the institute according to the standards. The power electronics laboratory is equipped with different converters setups like as rectifier, inverter, A.C voltage converter, DC-DC converter, Switching characteristics, BLDC drive and DC motor drive, where students can visualize the basics principles of different converters.

However, this work is focused on a modified sine wave inverter modular inverter kit which is a power device used in laboratory to understand the principle and behavior of single phase inverter which converter DC supply into AC supply. The trainer consists of power circuit of inverter, microcontroller based control circuit, power supply section, load section and protection circuit. All different types of control signals are generated using single control circuit by changing the program of individual switching pulse like square wave, QSW and SPWM. Separate CRO or digital signal oscilloscope is used to observe the behavior of the inverter.

1.1                                                   AIM OF THE PROJECT

The main aim of this work is to construct Power Electronic Training Board specifically used for the study of working of inverter. A Battery 12V 80AH (Any car battery) is required to operate this apparatus. Different test points have been provided to check wave shape and amplitude of pulses how DC supply is changed to AC supply.

1.2                                               OBJECTIVE OF THE PROJECT

At the end of this work students involved shall be able to understand:

1. The working of Power Electronic Training Board
2. The study of working of inverter.
3. Explain the working of inverter circuit.
4. Explain various types of inverter circuit.
5. Study of single phase half bridge inverter with R load.
6. Study of single phase half bridge inverter with R-L load.
7. Study of single phase full bridge inverter with R load.
8. Study of single phase full bridge inverter with R-L load.
9. Study of FFT analysis of square wave inverter.
10. Study of Sinusoidal Pulse Width Modulated (SPWM) inverter.

1.3                                           SIGNIFICANCE OF THE PROJECT

The Inverter trainer is a versatile training System for Laboratories. It is designed such that all the basics of Inverter can be easily understood. This training system provides understanding about conversion of DC into AC by PWM Technique.

1.4                                            APPLICATION OF THE PROJECT

This device is equipment for education, engineering and vocational training – Inverter Trainer.

1.5                                                   SCOPE OF THE PROJECT

The Inverter trainer is a versatile training System for Laboratories. It is designed such that all the basics of Inverter can be easily understood. This training system provides understanding about conversion of DC into AC by PWM Technique. Different blocks are explained like charging of battery, DC to AC conversion, AC mains sensing circuit, etc. also provided with fault switches to develop the troubleshooting practice. PWM Inverter Technology Stand alone operation Compact design self explained layout provided with Rechargeable battery On board LED indication for mains, charging, inversion.

A Battery 12V 80AH(Any car battery) is required to operate this apparatus. Different test points have been provided to check waveshape and amplitude of pulses how DC supply is changed to AC supply.