Tweaks and Typofixes

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Abhijit Kshirsagar 2025-03-02 02:36:16 +05:30
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</p>
<p style="font-size: 14px" class="text-left">
<a style="color:#b5bec9;font-size:0.8em; float:left;" href="translation/" target="_blank">Translation</a>
<a style="color:#b5bec9;font-size:0.8em; float:left;" href="translation/" target="_blank">/Translation/</a>
</p>

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---
layout: resume
layout: page
menuorder: 4
menutitle: Consultancy
---

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### Teaching
I teach theory and laboratory courses at the undergraduate and postgraduate level in Power Electronics, Drives, Renewable Energy, Electric Vehicles, and Embedded Control. For more details see [here](/teaching.html)
I teach theory and laboratory courses at the undergraduate and postgraduate level in Power Electronics, Drives, Renewable Energy, Electric Vehicles, and Embedded Control. For more details see [here](teaching/)
### Training and Consultancy

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## Ongoing Research
### Modular and Multilevel Converters
One of the
Cascaded H-Bridge (CHB) multilevel inverters are popular because of
their inherent modularity, scalability, and efficient voltage
translation capability. Carrier-based modulation schemes such as
Level-Shifted PWM (LSPWM) are simple and easy to implement but result in
extreme disparity in processed power among the modules. This unequal
loading and non-uniform semiconductor loss results in unequal thermal
stress, accelerating premature failures in over-stressed modules.
Space-vector and switching angle adjustment schemes can remedy this but
can be computationally impractical for higher-order CHBs.
Our work has led to the development of new, computationally efficient
carrier-reassignment schemes for 9-level and 17-level
CHB inverters to achieve near-perfect real and reactive power balance across
modules over the entire power factor range. Further, semiconductor loss analysis
shows that conduction and switching losses are also equalized
across the topology. A simple combinational circuit is also developed to balance the zero-state conduction losses without introducing additional switching.
A 9-level CHB Power stage is developed for hardware testing and detailed loss models are
made in Real-time simulation using the state-of-the-art OpalRT HIL Platform.
![9L Hardware]({{ site.github.url }}/images/9L-Hardware.png "9-Level Inverter Hardware")
![9L Hardware]({{ site.github.url }}/images/9LWaveform.png "Hardware Tests: 9L Inverter in Grid-connected Mode")
### Magnetics Design for Power Harvesting
This is a temporary placeholder
Patent Pending:<br>
A power harvester for line-crawling robots for Live Powerline inspection
### Power Converters for EV Chargers
This is a temporary placeholders
![FEA Analysis]({{ site.github.url }}/images/FEM.png "Hardware Tests: 9L Inverter in Grid-connected Mode")
### Real-time Simulation and Hardware-in-Loop Testing
This is a temporary placeholders
[//]: # ### Power Converters for EV Chargers and ### Real-time Simulation and Hardware-in-Loop Testing

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menuorder: 3
---
I am an Assistant Professor in the Department of [Electrical, Electronics, and Communications Engineering](http://ee.iitdh.ac.in) at the [Indian Institute of Technology at Dharwad](https://iitdh.ac.in/). I am a part of the [Power and Energy group](https://sites.google.com/iitdh.ac.in/peg-iitdh) where I conduct research in power electronics, renewable energy systems and electric mobility.
I completed my M. Tech. (Electronics Design) and Ph.D (Power Electronics and Drives) from the [Department of Electronic Systems Engineering](https://iitdh.ac.in/kabhijit/dese.iisc.ac.in) (formerly CEDT) at the [Indian Institute of Science, Bangalore](https://iitdh.ac.in/kabhijit/iisc.ac.in). I was a postdoctoral fellow in the US, at the [University of Minnesota, Twin Cities](http://umn.edu/) and at the [Oak Ridge National Lab](https://www.ornl.gov/), Tennessee.
### Research
My work aims to enable equitable, sustainable and economical use of clean energy. My current focus areas include power electronic converter topologies and controls, grid-integration of renewables, and converters for electric vehicles.
I am currently working on control schemes for modular converter topologies, soft-switched converters and power converters for EV chargers. The work is hardware-focused: we develop new topologies and control schemes, built converter prototypes, and implement the controllers using
microcontrollers, DSPs and FPGAs. We also have a high-end Power Hardware-in-Loop platform which we
use for our work on Grid-tied inverters.
This work is supported by generous grants from DST and ANRF (erstwhile SERB), along with substantial support from several industry partners.
### Teaching
I teach theory and laboratory courses at the undergraduate and postgraduate level in Power Electronics, Drives, Renewable Energy, Electric Vehicles, and Embedded Control. For more details see [here](/teaching.html)
### Training and Consultancy
I work with industry partners on a wide variety of collaborative efforts. Please email me with your specific requirements for more information. [Here](/consultancy/) are some additional details.
###### Autumn 2022
@ -80,7 +57,3 @@ This course will cover many of the design choices and decisions that product des
This will be a graduate topics course covering advanced topics in power conversion topologies, such as power semiconductor device characteristics and behaviour, advanced concepts in design of magnetics for power converters; resonant, soft switching and wireless power transer.
### Outreach
I have worked with grassroots organisations and non-profits in Bangalore and Minneapolis/St. Paul for public education on energy and renewables, and helping with community engagement. If you are involved with such efforts, especially in North Karnataka, I would love to know more and get involved.