A soft switched low stress zero-voltage transistor (ZVT) pulse width modulated (PWM) buck converter has been suggested in this paper. The proposed converter eliminates large current and voltage stresses which are generally exhibited by the capacitor of resonant converters. The proposed converter is simulated in PSIM software. The results of the simulation and the waveform outputs have been presented in the paper. The Zero Voltage Switching (ZVS) resonant buck-converter's switching losses have been compared with that of ZVT buck converter with software results. The auxiliary switch forms a resonant loop, decreasing the voltage or current on the power switch to zero, which switches before the main power switch is switched to the conducting state. The ZVT/soft-switching power converter decreases component stress and conduction losses by reducing the voltage/current and minimizes switching losses. The overall efficiency of the converter improved to 97% which is higher than the conventional converter. © 2018 IEEE.

Indragandhi V

Department of Energy and Power Electronics

School of Electrical Engineering

Vellore Campus

Elangovan Devaraj

Arunkumar G

Kumar L.A

Selvamathi R

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Photovoltaic Based Zero Voltage Transition DC-DC Buck Converter

2018 International Conference on Engineering, Applied Sciences, and Technology (ICEAST)

IEEE Transactions on Vehicular Technology

Input-Parallel Output-Series DC-DC Boost Converter With a Wide Input Voltage Range, For Fuel Cell Vehicles

Electronics Letters

Input-parallel output-series DC–DC converter for non-isolated high step-up applications

IEEE Journal of Emerging and Selected Topics in Power Electronics

Overview of High-Step-Up Coupled-Inductor Boost Converters

IEEE Transactions on Industrial Electronics

High Step-Up DC–AC Inverter Suitable for AC Module Applications

Renewable sources like solar photovoltaic (PV) and fuel cell stack are preferred to be operated at low voltages. For applications such as grid-tied systems, this necessitates high voltage boosting resulting in efficiency reduction. To handle this issue, this paper proposes a novel high voltage gain, high-efficiency dc-dc converter based on coupled inductor, intermediate capacitor, and leakage energy recovery scheme. The input energy acquired from the source is first stored in the magnetic field of coupled inductor and intermediate capacitor in a lossless manner. In subsequent stages, it is passed on to the output section for load consumption. A passive clamp network around the primary inductor ensures the recovery of energy trapped in the leakage inductance, leading to drastic improvement in the voltage gain and efficiency of the system. Exorbitant duty cycle values are not required for high voltage gain, which prevents problems such as diode reverse recovery. Presence of a passive clamp network causes reduced voltage stress on the switch. This enables the use of low voltage rating switch (with low 'on-state' resistance), improving the overall efficiency of the system. Analytical details of the proposed converter and its hardware results are included. © 2016 IEEE.

Design and Analysis of a High-Efficiency DC-DC Converter with Soft Switching Capability for Renewable Energy Applications Requiring High Voltage Gain

Journal	Data powered by Typeset2018 International Conference on Engineering, Applied Sciences, and Technology (ICEAST)
Publisher	Data powered by TypesetIEEE
Open Access	No