Power Electronics Open Ended Lab - 2022

EE-312L Power Electronics Lab
Open Ended Laboratory Project

This project is an open ended lab assignment. Students are free to think about different
designs solutions and come up with the best one. It is mandatory to fulfil all the
requirements of the problem statement as found in this document. Students are
encouraged to include additional features in the assigned Open Ended Lab project.
The aim of these projects is to design and develop a power electronic circuit controlled
by microcontrollers. There are three project to be done by students. Each group will do
only one project.
A group of 4 students (same as in the lab) can choose any one of the three projects.
However, there is an upper limit on the registration for a specific project. For example,
out of 12 labs groups, 4 groups can choose Project A, 4 other groups can choose Project
B and the remaining groups can choose Project C. The registration of the projects is on
first come first serve basis. CRs are requested to please prepare a list of groups with
their chosen projects and email to Lab teacher by Monday 14 March, 2022.
Project Deadline: Two weeks before the final exams (Tentatively first week of the May
2022)
Important: If any project or its report (in part or whole) is found plagiarized, F Grade
will be awarded to each member of that group. The project is worth 20-25% of final lab
grade.
Project A
Statement/Title: Design and Implementation of a Single Phase Full-Bridge Inverter
with 180 Degree PWM and Sine PWM.
Description:
Inverters are mostly used in solar systems to convert DC power from solar panels into
AC power. They can produce single-phase or three-phase output. The output voltage of
a single phase inverter is a square wave that later on can be converted to a sinusoidal
voltage using filter. Other techniques to reduce the output voltage harmonics are to
apply different PWM techniques. The design requirements to be considered are:
 The input voltage should be around 40 V.

 Only STM or Tiva TM4C123 board is allowed as a microcontroller.
 There should be an electrical isolation between the logic signals and the main
power circuit.
 The load should be of at least 100 W.
Tasks:
1. Implement 180 degree conduction PWM.

2. Implement sinusoidal PWM.
3. Try different types of loads (resistive and inductive) at the output for tasks 1, 2,
and 3.
4. Record the waveforms of voltage and current at the output using the USB save
option available in DSO. Pictures from digital or mobile cameras are not allowed.
Perform this step for steps 1, 2, 3 and 4.
5. Determine the RMS output voltage as well as the inverter efficiency for each
load.
6. Perform the simulation (using MATLAB) of the designed circuit and include
results in the report.
Report:
Students need to make a report in LaTeX. The report should include:
 Literature review
 Block diagram of the system
 Detailed design and analysis
 Detailed circuit diagram
 Explanation of the circuits
 Simulation results
 Hardware results (All source and load parameters, switching parameters,
spectrum, THD etc.)
 Conclusions
 References
 Appendix for Code etc.
The tentative grade distribution table (Rubrics) is shown below:
Item Sub-item Points

Code implementation 10
Hardware Evaluation
Circuit working 10
Timely Submission 10
Literature review 10
Block diagram of the system 5
Detailed design and analysis 10
Report Detailed circuit diagram 5
Explanation of the circuits 10
Simulation results 10
Hardware results 10
References 10
Total 100
Project B
Statement/Title: Design and Implementation of an Open Loop Buck-Boost Converter.
Description:
A Buck-Boost converter is type of DC-to-DC converter that has an output voltage

magnitude either greater than or less than the input voltage. By varying the duty cycle,
the output voltage can be controlled. The main applications of this converter include
self-regulating power supplies, consumer electronics and power amplifier applications.
The design requirements to be considered are:
 The duty ratio should a variable between 5-80%.

power circuit.
 The load should be of at least 1 Amps.
Tasks:
1. Each group needs to take 10 readings at different duty ratios and make the table
of observations in the report as shown below. The readings should span from the
minimum (the first reading) to the maximum firing angle (the last reading) with
almost equal intervals.
Sr. No. Duty Ratio ( ) ( )

(Practically using DMM) (Theoretically using calculations)
1
2
3
..
..
10
2. Record the waveforms of voltage and current at the output and the inductor
current using the USB save option available in DSO. Pictures from digital or
mobile cameras are not allowed. Perform this step for reading 3, 6 and 9.
3. Determine the ripple in the output voltage as well as the converter efficiency.
4. Perform the simulation of the designed circuit and include results in the report.
Report:
spectrum, THD etc.)
 Conclusions
 References

Hardware Evaluation
Circuit working 10
Timely Submission 10
Report Detailed circuit diagram 5
Explanation of the circuits 10
Hardware results 10
References 10
Total 100
Project C
Statement/Title: Design and Implementation of a Single Phase Full-Bridge Inverter
with 120 Degree PWM and Sine PWM.
Description:
Inverters are mostly used in solar systems to convert DC power from solar panels into
AC power. They can produce single-phase or three-phase output. The output voltage of
a single phase inverter is a square wave that later on can be converted to a sinusoidal
voltage using filter. Other techniques to reduce the output voltage harmonics are to
apply different PWM techniques. The design requirements to be considered are:

power circuit.
 The load should be of at least 100 W.
Tasks:
7. Implement 120 degree conduction PWM.

8. Implement sinusoidal PWM.
9. Try different types of loads (resistive and inductive) at the output for tasks 1, 2,
and 3.
10. Record the waveforms of voltage and current at the output using the USB save
option available in DSO. Pictures from digital or mobile cameras are not allowed.
Perform this step for steps 1, 2, 3 and 4.
11. Determine the RMS output voltage as well as the inverter efficiency for each
load.
12. Perform the simulation (using MATLAB) of the designed circuit and include
results in the report.
Report:
spectrum, THD etc.)
 Conclusions
 References

Hardware Evaluation
Circuit working 10
Detailed circuit diagram 5
Report Explanation of the circuits 10
Hardware results 10
Conclusion 10
References 10
Total 100

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EE-312L Power Electronics Lab

Open Ended Laboratory Project

 The input voltage should be around 40 V.

1. Implement 180 degree conduction PWM.

Students need to make a report in LaTeX. The report should include:

The tentative grade distribution table (Rubrics) is shown below:

Item Sub-item Points

A Buck-Boost converter is type of DC-to-DC converter that has an output voltage

 The duty ratio should a variable between 5-80%.

Sr. No. Duty Ratio ( ) ( )

Students need to make a report in LaTeX. The report should include:

The tentative grade distribution table (Rubrics) is shown below:

Item Sub-item Points

 The input voltage should be around 40 V.

7. Implement 120 degree conduction PWM.

Students need to make a report in LaTeX. The report should include:

The tentative grade distribution table (Rubrics) is shown below:

Item Sub-item Points

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