Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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Author: search.filters.author.Kundu, A.

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    Reduction of reflectance at c-silicon solar cell using nanotexturization
    (Institute of Electrical and Electronics Engineers Inc., 2014) Maity, S.; Kundu, A.; Das, S.; Chakraborty, P.
    Reduction in reflection losses of bare silicon surfaces has always attracted many researchers as it by far remains the most important criterion needed for achieving high efficiency solar cells. Anti-reflection coatings (ARC) of dielectrics help in balancing the refractive index mismatch between silicon and air. Although such ARCs help in reducing the reflection losses, they do not cause bending of light rays which is essential for efficient light trapping of the injected light into the cell. The technological leaps in the last few decades have lead to the possibility of nanotextured surfaces comprising of sub-wavelength structures in the optical domain. We report a simple and fast process for nanotexturing of the silicon surface may be achieved by creating silver nano-islands on the silicon surface and etching the exposed silicon surface. © 2014 IEEE.
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    Regulating frequency of supply voltage using matrix converter and comparative evaluation with double end converter
    (Institute of Electrical and Electronics Engineers Inc., 2017) Kundu, A.; Vittal, K.P.
    This paper attempts to present the devising of the Matrix converter and an AC-DC-AC converter along with their working principle and control mechanisms. Both of these converters are AC-AC converters and are primarily used in cases where frequency of the out-put AC signal needs to be regulated with respect to the input. The principle of superposition is used by the matrix converter and is deployed to provide a bidirectional power flow. This also aims to eliminate the need for large DC link capacitors. Subsequently, the control algorithm is more complex. An AC-DC-AC converter on the other hand engages switched mode power conversion to first convert the input AC power to DC and then convert it back to AC using a PWM inverter. We also aim at understanding the applications of both the converters with respect to their performance under various conditions. © 2016 IEEE.
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    Stabilizing switching signals for discrete-time switched linear systems: A unifying framework
    (Institute of Electrical and Electronics Engineers Inc., 2019) Nayak, A.; Kundu, A.
    This paper deals with global asymptotic stability of discrete-time switched linear systems. We present a class of stabilizing switching signals that unifies prior results based on both point-wise and asymptotic characterizations under an umbrella framework. © 2019 IEEE.