Conference Papers

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

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Author: search.filters.author.Nagendrappa, N.

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    Multiport Converters to Integrate Multiple Sources and Loads - A Review of Topologies
    (Institute of Electrical and Electronics Engineers Inc., 2018) Adarsh, S.; Nagendrappa, N.
    With the increase in penetration of variety of renewable energy resources in the grid, energy storage systems are needed to balance power flow and improve the reliability of the system. A compact multiport converter supporting bidirectional power flow is a suitable candidate to interface multiple sources and loads. This paper reviews various multiport converter topologies in the literature. The multiport converters can be classified as isolated, partially isolated and non isolated converters. The converter topologies in each category are identified and reviewed. Their benefits and drawbacks are highlighted. © 2018 IEEE.
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    Analysis and Experimental Investigation of Double Switching Active Vector Sequences in Dodecagonal Space Vector Structure
    (IEEE Computer Society, 2020) Arumalla, R.T.; Figarado, S.; Nagendrappa, N.
    The PWM technique used in the inverter influence the harmonic content of the inverter output and the switching losses in the inverter. The dodecagonal space vector based PWM schemes are amongst the popular harmonic elimination schemes for an open-end winding induction motor drive. These techniques give a better harmonic profile by eliminating the dominant lower-order harmonics (fifth and seventh) from the output voltage of an inverter in the entire modulation range. In this paper, double switching active vector sequence based bus-clamping PWM schemes are developed for dodecagonal SV structure, wherein one of the active vectors in a sector is switched twice in every sub-cycle period. These techniques are named as dodecagonal space vector based advanced bus-clamping PWM (ABC12PWM) techniques. The proposed PWM techniques give a better harmonic profile at higher modulation indices as compared to the dodecagonal conventional space vector PWM (C12SVPWM) and dodecagonal bus-clamping PWM techniques (BC12PWM) techniques. The analysis of total RMS harmonic distortion and switching losses are done for the proposed schemes, and the obtained results are compared with C12SVPWM and BC12PWM techniques. The implementation of proposed PWM schemes is done on a laboratory scale induction motor drive. © 2020 IEEE.
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    Magnetic Coupling Characteristics of Spiral Square - Circular Coupled Coils for Wireless EV Battery Charging System
    (Institute of Electrical and Electronics Engineers Inc., 2020) Kishan, D.; Vinod, M.; Nagendrappa, N.
    Electric Vehicles (EVs) are gaining continuous interest due to higher efficiency than internal combustion engine vehicles, and environmentally friendly nature. Nowadays, most of the EV uses the conductive charging method to charge the battery. Besides that, wireless inductive charging technology for EV has recently received a great attention because of the advantages such as increased user convenience and safety. In this method of charging mutual inductance between the wireless inductive coils is the crucial factor. Hence, this paper describes the mutual inductance characteristics of the transmitter with spiral square - receiver with circular (i.e., interoperability spiral square and spiral circular of coils) at various vertical distances using FEM simulations. © 2020 IEEE.
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    Current Source Isolated Bidirectional Series Resonant DC-DC Converter for Solar Power/Fuel Cell and Energy Storage Application
    (IEEE Computer Society, 2021) Bathala, K.; Kishan, D.; Nagendrappa, N.
    This paper presents the performance analysis of a current source isolated bidirectional DC-DC converter (CSIBDC) for PV and Fuel Cell (FC) applications. The proposed CSIBDC converter has been chosen to integrate solar power with energy storage systems. Since the solar power is intermittent in nature and it has no dispatch ability on its own, the proposed converter can enable small voltages available from PV to step up by operating in the boost conversion mode. The current source dual active bridge (DAB) converter topology is a good choice for battery charging and discharging applications due to its bidirectional power transfer capability. To achieve high power density with ZVS transition, the proposed dual active bridge converter is operated with phase shift control technique. In order to evaluate the performance of the proposed DAB converter the simulations are carried out using PSIM software. © 2021 IEEE.