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15 results on '"Biswal, Pravat"'

1. Improved Interleaved Buck Converter with High-Step Down Conversion Ratio and Soft-Switching.

Author

Kumar Bhajana, Veera Venkata Subrahmanya, Biswal, Pravat, Drabek, Pavel, and Kakani, Vijay

Subjects
*CONVERTERS (Electronics), *VOLTAGE, *ZERO current switching, *SWITCHING circuits, *ELECTRIC inductors
Abstract

This article proposes a new interleaved buck converter with a high step-down conversion ratio and soft-switching. The soft-switching conditions for the main IGBTs are achieved with the aid of a simple auxiliary circuit, which comprises a resonant inductor, a resonant capacitor, and a diode. A new interleaved buck converter is realized by adopting two auxiliary circuits separately connected to each one of the legs to provide zero voltage switching (ZVS) and zero current switching (ZCS) turn-on operation. The major advantages of this converter are reduced switching losses, a high step-down ratio, reduced voltage stresses, and no limitation on duty ratio. To validate the theoretical analysis, a laboratory prototype of a 200 V-60 V converter system has been developed and achieved an efficiency of 96% at 250 W output power. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Designing and Sizing of a Stand-alone Photovoltaic System: A Case Study

Author

Rout, Kshirod Kumar, Mishra, Sivkumar, Biswal, Pravat Kumar, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Mohanty, Mihir Narayan, editor, and Das, Swagatam, editor

Published
2020
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3. Design and Simulation of a Standalone Photovoltaic System Using Synchronous Boost Converter and Reduced Switch Five-Level Inverter

Author

Rout, Kshirod Kumar, Mishra, Sivkumar, Biswal, Pravat Kumar, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Mohanty, Mihir Narayan, editor, and Das, Swagatam, editor

Published
2020
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4. Extended high gain DC‐DC converter with switched‐inductors, switched‐capacitors and soft‐switching: Analysis and implementation.

Author

Biswal, Pravat, Bhajana, Veera Venkata Subrahmanya Kumar, Iqbal, Atif, Kakani, Vijay, and Popuri, Madhuchandra

Subjects
ZERO voltage switching, VOLTAGE multipliers, SWITCHING systems (Telecommunication), VOLTAGE, CAPACITOR switching, PROTOTYPES
Abstract

This paper proposes an extended DC‐DC converter with high voltage conversion ratio and soft‐switching ability. The proposed converter has active switched‐inductors, switched‐capacitors included in the conventional high gain converter and operates in continuous conduction mode (CCM). Simple auxiliary resonant elements are added on the primary leg of the converter to provide design freedom for soft‐switching operation. The significant merits of the proposed converter are lesser voltage and current stresses, high voltage gain with reduced component count and better efficiency. Additional feature of this converter is soft‐switching operation under different load conditions and duty ratios without considerably increasing stresses. The zero voltage switching (ZVS) turn‐on operation is obtained for all switching devices. Therefore, switching power losses are minimized greatly. This paper presents the description, principles of operation and steady state analysis in comparison with the existing high gain converters. The theoretical analysis is verified with a 350 W prototype operated at input is 20 V and output is 220 V. The overall efficiency achieved is 96.7%. The obtained results confirm ZVZCS operation at full load. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Novel Soft-Switching High Gain Transformerless DC-DC Converters without Auxiliary Switches for Renewable Energy Systems

Author

Biswal, Pravat, Subrahmanya Kumar Bhajana, V.V., Drábek, Pavel, and Pinker, Jiří

Subjects
formátování, style, Hardware_GENERAL, styl, component, styling, formatting, komponent, insert, vložení
Abstract

This paper presents new soft-switching transformerless DC-DC converters without auxiliary switches. The soft-switching operation is achieved with the aid of simple resonant cell, which comprises of an inductor, a capacitor and a diode. In addition to the auxiliary cell, a voltage multiplier cell also included in order to ensure high voltage conversion ratio. The major advantages of the proposed converters are reduced turn on/turn off losses, high conversion ratio and very simple auxiliary circuitry. A resonant cell is incorporated in this converter which is used to turn on the main switching devices at zero current and turn them off at zero current. The zero current switching operation is achieved with a simple auxiliary cell. This paper describes the operation principles and the design simulations of proposed converters. The theoretical analysis of the proposed converters is validated by the simulation analysis on 12V/360V/1kW converter systems

Published
2020

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