Comprehensive Report: Design and Fabrication of DC to AC Converter

This project report details the design and fabrication of a DC to AC power converter, focusing on converting DC to AC power and boosting lower DC voltages to higher DC levels using PWM. The project objectives included reviewing conversion methods, proposing a suitable design, analyzing sine wave outputs, and using a transformer to achieve 220V. The author's role involved electrical engineering tasks, including maintenance, installation, and design modifications, with a focus on commercial kitchen equipment like ovens. The report also covers the theoretical background, engineering skills applied, accomplishments, identified issues, and solutions, such as addressing the broad range of BM2P series and oscillation frequencies. The project aimed to produce creative and innovative work through collaborative efforts and regular meetings. Desklib provides a platform to explore similar projects and solved assignments for students.

CE 1.1 Project Information
Name of the project: Design and Fabrication of DC to AC Converter
Location of the project: Please fill
Project Duration: Please fill
Organization: Please fill
Role and Designation during the time: Team Member of the project
CE 1.2 Project Background
CE 1.2.1 Characteristics of the project
A power inverter can be defined as the specific electronic device, which changes the
DC or direct current to the AC or alternating current. The output voltage, output frequency,
total power handling and the input voltage is completely dependent on the designing of the
circuitry or device. I have designed a power converter for converting DC to AC. Furthermore,
I even focused on the method of converting lower voltage of DC power to the higher voltage
of DC source with the help of PWM or pulse width modulation. The outcome of the method
was analyzed for further checking as well as analysis. The main result of this project was to
obtain two different forms of AC outputs, which are pure sine wave and modified sine wave.
I have seen the modified sine wave as maximum of the square wave than the sine wave.
Moreover, I used the transformer that can easily boost up the voltage up to 220 volts. Hence,
in the project, I have significantly developed the compact and complete design of DC to AC
power converter and hence evaluated the efficiency of the desired outcome.

CE 1.2.2 Objectives developed for the project
During the project of Design and Fabrication of DC to AC Power Converter, the
entire designing part required higher constants that can easily reduce the effectiveness and
operation. I have even found out the fact that the utilization of higher dielectric constants can
subsequently provide a narrow bandwidth. Thus, in the project my objective was to develop a
design while making the significant trade off within the conversions from DC to AC.
Therefore, for completing this project with higher efficiency as well as priority, I have
successfully developed the following objectives:
 To review and analyze several methods of conversions that is efficient.
 To propose an appropriate design for the DC to AC converter.
 To check the different forms of outputs of sine waves.
 To review the output and check with the desired outcome.
 To use the transformer for boosting up voltage of 220 volts.
CE 1.2.3 My area of work
Since, during this project work I had experience in field work; I was appointed as the
chief electrical engineer. I had been working as a team member under the proper guidance of
my team leader. I had to help my other team members in this particular project. Before
starting the work in this project, I have researched about the converter that helps to convert
direct current to alternating current. The practical part of the project was started only after
studying and reviewing the past studies based on DC to AC power converter for
understanding and evaluating the properties and characteristics. My major area of work was
simply to convert the lower DC power voltage to the respective higher DC source voltage.
My other important areas of work were to participate within the usage as well as
advancement of the complete computerized and digitalized management system. I even
directed the design department to prepare the detailed drawings and requirement drawings.

My major segment was related to commercial kitchen equipment. I selected oven for this
purpose. The complete installation as well as implementation of the oven was done by me
and I even monitored and checked the quality of materials. I was also recruited as the
assistant of my team leader.
CE 1.2.4 Project Group
Figure 1: People involved in the project
CE 1.2.5 My responsibilities throughout the project
In this project, as a chief electrical engineer, I had to undergo various electrical works
with my team members and team leader. My first responsibility was performing the electrical
maintenance work, wherever required after involving the important repair to all the higher
line MEP infrastructures and utilities. I even installed, altered, maintained and finally
repaired the electrical wiring system and equipment. As the chief electrical engineer, I also
prepared and presented several sketches to show the locations of equipment or wirings. Since,
I was executing the project related to kitchen equipment; I had to note down the wave forms
on the basis of input current and voltage and finally match them with the desired output

voltage. I was even assigned for the work for developing the appropriate design that I have
conducted after the simulation and analysis of the converter. I even acquired and updated the
knowledge from the suppliers regarding the new products and services required in this
project. Since, this project was linked to commercial kitchen; I ensured customer satisfaction
on the first position. The electrical and mechanical drawings of the DC converter within oven
were the most important requirements for this project and I made all of them.
CE 1.3 Distinctive Activity
CE 1.3.1 Comprehending the Theory of Project
This particular project of Design and Fabrication of DC to AC Power Converter
mainly focused on the transformation of the DC power to the respective higher voltage of AC
source. The typical power inverters are those devices, which comprise of the capability to
convert the DC energy to respective AC energy. The main objective of DC to AC power
inverter has significantly undertaken the DC power directly, which is supplied by battery, and
then finally transforming the voltage into the 220 volt AC power source that is perfectly
working at a frequency of about 50 Hz. The wave forms of my oven were noted in respect to
square, modified and pure sine waves. The voltage raged between 0 volt and 180 volt and it
was noted in respect to time.

Figure 2: Square, Modified and Pure Sine Wave
After proper testing, I deduced that the modified sine wave was stagnant at 0 volt for
one moment and then it either rises or falls.
CE 1.3.2 Engineering knowledge and skills applied in the project
The first skill that I have applied here is the circuit designing. For completing this
work, I had to design the respective circuit of my oven. I even used theoretical knowledge for
designing a transformer and various forms of wave. The instrumentations and the proper
electrical measurements were the next significant skills applied in this project. I had also
tested the electric current and each and every component from reacting with each other.
CE 1.3.3 Accomplishment and Task Performed
I had two options of carrier waves and they were saw tooth and triangular signals. I
selected the triangular wave for my specific project. This wave was at about 50KHz in the
optimal power loss simulations.
Figure 2: Triangular Wave Generator
This circuit that has been oscillating at the specific frequency of ¼, the amplitude was
eventually controlled. The typical bootstrapping capacitor and the diodes was connected as

designed by me. There were several values for every component of the application. I
undertook the lowest value of capacitor. I evaluated that it was 2uF and the respective
frequency of the bridge was of around 60Hz and about 51n`F for the 50KHz size of my
bridge.
CE 1.3.4 Identified issues and their solutions
1.3.4.1 Issues
The first significant issue that I had faced here was with the broad range of the series
of BM2P. This specific series consists of about 24 distinct models, with its internal output
power transistors and the most protective functionality. The next issue that I had faced during
the project was the oscillation frequencies of the converter voltages in the computation time.
Each and every frequency majorly depends over the size of system impedance. The capacitor
size was gained from the typical controllable AC to DC converter and even was completely
erroneous in my project. I distinctly compared my experimental results with the simulation
and the theoretical results. Each and every above mentioned issue was to be solved as early as
possible.
1.3.4.2 Solutions
I provided some of the most relevant solutions to all the above mentioned issues,
which we had come across in this project of Design and Fabrication of DC to AC Converter.
For the very first issue of broad range of the Series of BM2P, I gave the suggestion that our
inverter must be tripped and hence it is needed to press the button of trip reset within the
device for the purpose of resetting it. This series of BM2P comprised of 24 models and thus I
gave the suggestion that a specific and perfect series must be chosen. For the next important
problem of the oscillation frequency of the converter voltage within this typical project, I
provided the relevant suggestion that the harmonic oscillator was the system, which was

whenever displaced from our position of equilibrium, solely gets the experience of every
restoring force, completely proportional to the displacement.
CE 1.3.5 Plan to produce creative and innovative work
My plan was simply to produce the most creative and innovative work by perfectly
dividing our work. This kind of effective and efficient plan helped me in knowing and
identifying our errors and flaws and thus I was successful to remove each and every problem
within this particular project.
CE 1.3.6 Collaborative Work
We made sure that each and every team member are executing their duties or
responsibilities effectively and efficiently. I even arranged for regular meetings in our project
schedule to identify the loopholes. Moreover, this project was completed with the
collaborative work of our project team members.
CE 1.4 Project Review
CE 1.4.1 Project Overview
The entire project result helped me in designing a converter that has the core
capability to change DC power to AC power. The higher voltage switching was the main part
in this project. I even operated the generators for supporting the operations. The electrical
systems were also repaired in this process.
CE 1.4.2 My Contribution to work
In this project, I have performed higher voltage switching as well as operated
generators for the support of each and every operation at the transmission plant. I also had
planned for the electrical installations to reduce of wastage of material and then provided

proper access for future maintenance. I also took up the research part and then documented
the entire project report.