Interview: A session with Ajilore Samuel, an Electronic Electrical Engineering Student whose work we find fascinating

One of our correspondents at was out in the field for the month of March to find the most fascinating engineering projects a Nigerian student is writing his/her final-year thesis on, and he found one that may catch your attention and hold it.
The discussion with Ajilore Samuel (SamDdon) was not only educative, we also had great fun as he is all round witty and enticing to chat with.
The Interview

Interviewer: Tell us about yourself

Samuel: I am Ajilore Samuel Oluwatosin, Friends and relatives call me "SamDdon". I’m a fresh Graduate in the Department of Electronic and Electrical Engineering, Faculty of Engineering and Technology from the Prestigious Ladoke Akintola University of Technology, LAUTECH, Ogbomoso, Oyo State. I came from one of the Best State in Nigeria, (you don't have to start guessing which state that can be) No other state than the Popular and productive "Ipinle Omoluabi - The State of Osun", Ilesha to be precise. I am the Second son of my fantastic Family of Four.

Interviewer: Well, that sounds really interesting. Do you mind telling us about your final year Project?

Samuel: Not at all, my project topic was " Designing and Construction of a 3.5kva, 48V inverter".

Interviewer: Wet our appetites

Samuel: In Nigeria, the two most popular alternatives to the national grid are Generators and Inverter / Solar power backup systems. 
The major challenge in the use of these alternative sources of electricity is in the ability to get an alternative power source that will perfectly replicate the parameters of the electricity that is supplied by the national grid without spending too much. The standard parameters of the national grid are itemized below
Wave type: Pure sine wave
Frequency: 50 hertz
Duty Cycle : 50%
Voltage: 230 Vrms 
What is an inverter?
An inverter is a device that converts the D.C. supply of the battery into A.C. power supply required by most of the electrical and electronic equipments.
An inverter typically contains a control circuit board, transistor switches and a transformer. The Inverter takes power supply from the battery converting the D.C. to A.C. A charger circuit is also incorporated to keep the battery charged. The battery serves as an electricity storage device.
Why is this project important?

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When the use of inverters started getting popular and acceptable in Nigeria, People were mainly concerned about having the alternative. Most People did not care about the parameters of these alternatives neither did they care about the short and long term effect of using an alternative power source that is not supplying standard parameters. About 90 percent of the inverters that were either imported or manufactured in Nigeria were not supplying the standard parameters. These inverters either supply a square wave or modified square wave (also known as modified sine wave) instead of pure sine wave. These inverters are can power about 70 percent of electronic devices without noticeable symptoms. The remaining 30 percent are inductive loads (fans, fridges, freezers, pumps, etc) and sensitive gadgets like digital medical equipments, digital sound systems, plasma TV, LED TV. Etc. The noticeable symptoms for these load are humming sounds that they make during operation on none sinusoidal power supply. A prolonged usage of sensitive electronic devices on none sinusoidal power supply may lead to over heating and smelling of such equipment and sometimes a total breakdown may occur.

As regard to the above situation, and to mitigate the after effect of the Modified square wave and or the Modified Sine wave Inverters. The Pure sine wave inverter was introduced which was what this Project was based on. 
Giving an equal output as the National Grid.

The project was carried out to overcome the problem of irregular power supply and to provide an alternative power that is compactable with all loads with its capacity.

This shows its Application is vast both on Commercial and Industrial uses

Interviewer: I suppose that answers our questions on ‘application of the device’. Well what is different about your design? 
We know this problem has been around for long and various approaches must have been made to curtail the effects so tell us your secret ingredient

Samuel: Designing of an inverter is not a new Development though, but this project is incorporate with the latest digital Load measurement display feature in the Inverter design. Also, I make use of microcontrollers in the design of the pure sine wave inverter.

Interviewer: I’d ask you what does that mean, but I have a feeling I won’t understand **winks**. You sound like a model student though, what advice do you have for undergraduates

Samuel: My Advice is to be FOCUSED. Even if the School environment most times is not encouraging. But we should always see a reason to keep moving forward. Also, Personal/Self Development is the Key in Engineering, think out of Classroom and the Courses, Practicals are so essential. "Learn, Unlearn, Relearn". Ask questions. And lastly be Optimistic and Positively Driven.


Those are the words of Ajilore Samuel SamDdon himself, if you have any question drop them in the comment section.

If you want us to do piece like this on your work contact us at

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