Power Electronics Engineer

• Jun 2022 - Present

Postdoctoral Fellow

• Jun 2018 - Jun 2022

As a postdoctoral fellow, I participate in several research projects.1. Multi-resonant and Multi-mode DC-DC Converters* I proposed several novel DC-DC converter topologies based on the switched resonators* Their operation is based on the multi-mode operation to regulate the output as a conventional DC-DC converter* Converter models are built on the PLECS and PSIM to validate their operation* Layout the mixed-signal PCB using EasyEDA* Implement the converter controller on a digital signal processor programmed using MATLAB/Simulink2. Power Supply of Nano Satellite* Lead a team to design a five-port power converter using a modular architecture* Design analog controllers of the 5 V and 3.3 V load ports* Design battery charging and discharging port following a Lithium-ion battery profile* Design the main controller on a dsPIC micro-controller to navigate between three modes* Test and validate the converter performance in terms of efficiency and reliability3. Wind-farm control strategy* Implement a wind farm model considering the wake as a software model* Model the DC-link capacitor bank considering the data input from the SCADA data-set of a wind turbine* Propose farm control strategy to equalize the DC-link capacitor lifetime* Analyze the impact of optimization of the electrical system on mechanical system developing a bearing model Show less

Sessional Instructor

• Jan 2022 - Apr 2022

Offered a course on power system stability and transient analysis course to undergraduate final year students.

Senior Lecturer

• Mar 2015 - Jun 2018

I mainly focus on research and development besides the teaching in this role. I supervised two master's students and several undergraduate final year projects and research students. I delivered the following courses in undergraduate and postgraduate programmes. *power electronics * Power Electronics Applications in Renewable Energy systems * Analog Electronics * Electronic Circuit Design Besides that, I offer a course on roof-top photovoltaic energy conversion systems to the practising engineers of the field. I research on, Networked DC nano-grid * Propose a DC power router to realize the nano-grid for rural electrification applications * Suggested use battery packs disposed of after using in electric vehicle to store solar energy * Multi-port power converter with a minimum number of switching and passive elements Step-up DC-DC Converters Based on Coupled-inductors * Propose coupled-inductor step-up converter to interface thermo-electric generators (TEG) to a DC-bus * Recycle the leakage energy of the inductor using voltage clamping circuits Non-isolated DC-DC Converter Synthesis Method Based on Low-entropy Equations * The existing converter synthesis method based on the connection matrix gives non-realizable, redundant and degenerative solutions * A method to decompose voltage gain polynomial ending up with low-entropy equations is proposed * It helps identify the basic single inductor converters to realize the power converter * This method can be applied to realized hybrid converters besides the conventional multi-inductor converters Show less

Project Officer

• Sep 2014 - Feb 2015

I integrated a supercapacitor bank to the front-end of a PV inverter using a multi-port power converter. The converter is based on the dual active bridge (DAB) and a bi-directional DC-DC converter. * Develop the converter model using PLECS and validate the operation * Layout a high-speed mixed-signal PCB using OrCAD to implement the circuit * Implement the converter controller on a digital signal processor (DSP) - TMS230F28335 * The converter controller is developed using MATLAB/Simulink block set and Code Composer Studio (CCS) Show less

Project Officier

• Feb 2011 - Aug 2011

I took a part in an industry-funded project to develop a photovoltaic micro-inverter * Design a micro-inverter based on a flyback converter * Develop the converter model using PLECS to validate the operation * Design the flyback inductor following the standard process and implement it using RM cores and Litz wires * Select the suitable MOSFET to realize the circuit * Layout a multi-layer circuit board using OrCAD to implement the circuit * Test the converter using PV emulator and grid-simulator Show less

Research Engineer

• Jun 2009 - Jan 2011

In this role, I designed a non-inverting buck-boost converter to charge a PB-acid battery using a DC motor as a generator. * Develop an accurate converter model using Simplorer * Design the converter including multiple analogue and digital circuits. * Layout high-speed mixed-signal PCB using OrCAD Layout * Develop control algorithm charge the battery following standard profile * Realize the controller on an ATMega controller programming using C on AVR Studio * Debug and test the converter to validate the functionality Show less