diff --git a/_includes/_additional_links_leftpane.html b/_includes/_additional_links_leftpane.html index e066131..27015be 100644 --- a/_includes/_additional_links_leftpane.html +++ b/_includes/_additional_links_leftpane.html @@ -15,5 +15,5 @@

- Translation + /Translation/

\ No newline at end of file diff --git a/consultancy.md b/consultancy.md index d988ca0..e2739c0 100755 --- a/consultancy.md +++ b/consultancy.md @@ -1,5 +1,5 @@ --- -layout: resume +layout: page menuorder: 4 menutitle: Consultancy --- diff --git a/images/9L-Hardware.png b/images/9L-Hardware.png new file mode 100644 index 0000000..1af9e12 Binary files /dev/null and b/images/9L-Hardware.png differ diff --git a/images/9L-Losses.png b/images/9L-Losses.png new file mode 100644 index 0000000..a44b964 Binary files /dev/null and b/images/9L-Losses.png differ diff --git a/images/9LWaveform.png b/images/9LWaveform.png new file mode 100644 index 0000000..2ef0bad Binary files /dev/null and b/images/9LWaveform.png differ diff --git a/images/FEM.png b/images/FEM.png new file mode 100644 index 0000000..368a41a Binary files /dev/null and b/images/FEM.png differ diff --git a/index.md b/index.md index 05fcc28..786af30 100755 --- a/index.md +++ b/index.md @@ -24,7 +24,7 @@ This work is supported by generous grants from DST and ANRF (erstwhile SERB), al ### 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 diff --git a/research.md b/research.md index c159c42..320b62e 100755 --- a/research.md +++ b/research.md @@ -8,13 +8,36 @@ menuorder: 2 ## 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:
+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 \ No newline at end of file + + +[//]: # ### Power Converters for EV Chargers and ### Real-time Simulation and Hardware-in-Loop Testing diff --git a/teaching.md b/teaching.md index 4c36cf6..4905071 100755 --- a/teaching.md +++ b/teaching.md @@ -5,29 +5,6 @@ menutitle: Teaching 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 @@ -79,8 +56,4 @@ This course will cover many of the design choices and decisions that product des * Advanced topics in Power Conversion -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. \ No newline at end of file +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. \ No newline at end of file