The aim of this study is to propose a high voltage lift isolated full bridge dc-dc converter. The proposed converter consists of an isolation transformer a low turn ratio to obtain high step up voltage gain. The secondary of the transformer connected with two boosting capacitors which connects parallel when power switches switch on period and discharged in series during the switch off period. In addition full bridge converter on primary side consists of clamping diode and capacitor, leakage energy is recycled there by improving conversion efficiency. The proposed circuits simulated using PSIM software form input voltage of 48V, an output of 410 V obtained. These results and operations experimented and validated by implementing in hardware model at 20/40 Vdc, 20 Watts. © Maxwell Scientific Organization, 2014.

Saravanakumar R

Department of Control and Automation

School of Electrical Engineering

Vellore Campus

Gopi A

Fulltext

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

Research Journal of Applied Sciences, Engineering and Technology

In this paper, an isolated high step-up single switch DC-DC converter for renewable energy source is proposed. In the proposed converter high step-up voltage is obtained by single power switching technique that operates low duty cycle with isolated transformer inductors and switched capacitors and power diodes. The disadvantage of conventional converters is that it has high duty ratio and high voltage stress on power devices with less efficiency. The proposed converter eliminates the switching losses and recycles the leakage energy which includes reverse recovery energy of the power diode by using passive clamp circuit. To achieve high output voltage gain, the isolated transformer primary terminal and secondary terminal are connected in series during switching operation. PSIM software has been used for simulation. Simulation circuit is analyzed at 40Vdc/400Vdc, 200 W and this operation is validated by implementing in the hardware model at 12Vdc/120Vdc, 60 W. Â© 2014 Production and hosting by Elsevier B.V.

Ain Shams Engineering Journal

High step-up isolated efficient single switch DC-DC converter for renewable energy source

A High Voltage-lift Efficient Isolated Full Bridge DC-DC Converter

With rising fuel costs, increasing concerns for global climate change, and a growing worldwide demand for electricity, utilizing renewable energy sources such as solar/Fuel power becomes a necessity rather than a luxury. The conversion of renewable energy sources into useful DC or AC power for residential and industrial applications is becoming more popular. But renewable energy re-sources comes with low output voltage (20V to 60V) range, so, in order to utilize this energy effectively, it has to be boosted to high DC voltage by using high efficient power converters &amp; then convert High DC to AC using Voltage fed-Inverter. Isolated boost converter is desirable in the low-to-high dc/dc application where isolation is required or a large step up is in a need. The challenge of designing such a converter for high power applications is how to handle the high current at the input and high voltage at the output. An effective way is to parallel the inputs and series the outputs of the isolated boost converters. Based on this concept, a new interleaved and isolated boost converter is proposed in this paper that has two inductors in parallel at the input to share the current and two capacitors in series at the output to share the voltage. The two Boost converter cells realize demagnetizing by helping each other, which simplifies the transformer structures. With interleaved operation, the current ripple is smaller; therefore, it is possible to use smaller capacitors at the input and output of the converter. All these features make the new interleaved isolated boost converter desirable for high power low-to-high dc/dc applications. At last, a 300 W prototype with 48 V-to-400 V is simulated and tested to verify the theoretical analysis in this paper. Â© 2014 IEEE.

2014 International Conference on Advances in Electrical Engineering (ICAEE)

Soft-switched high step-up DC-dc converter with voltage doubler

IEEE Transactions on Industrial Electronics

Novel Isolated High-Step-Up DC–DC Converter With Voltage Lift

IEEE Transactions on Power Electronics

A Cascaded High Step-Up DC–DC Converter With Single Switch for Microsource Applications

2010 IEEE Energy Conversion Congress and Exposition

An isolated high step-up forward/flyback active-clamp converter with output voltage lift

Highly Efficient High Step-Up Converter for Fuel-Cell Power Processing Based on Three-State Commutation Cell

Journal	Research Journal of Applied Sciences, Engineering and Technology
Publisher	Maxwell Scientific Publication Corp.
ISSN	2040-7459
Open Access	Yes