Hybrid modulated extended secondary universal current fed zvs converter for wide voltage range analysis, design, and experimental results To Get this projects Call : 9566355386 / 99625 88976 Visit : www.lemenizinfotech.com / www.ieeemaster.com Mail : projects@lemenizinfotech.com

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Hybrid Modulated Extended Secondary
Universal Current-Fed ZVS Converter for
Wide Voltage Range: Analysis, Design, and
Experimental Results
Abstract
Introduction:
Front-end dc/dc converters are necessary to boost the
source voltage with required isolation. It has been a challenge to
design a universal converter that is promising for interfacing
different sources with different operating voltage ranges. In
addition, maintaining soft-switching of semiconductor devices at
high frequency (HF) while achieving high efficiency is another
challenge. HF operation offers obvious merits of a compact and
lightweight system. Voltage-fed converters have several issues
such as rectifier diode ringing, duty cycle loss, etc., and are not
suited for high-gain and high-current applications. Soft-
switching can be achieved using additional components but at
the cost of increasing the topology’s complexity with a limited
soft-switching range.
Existing system:

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Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
A novel and simple zero-current-switching (ZCS) current-
fed half-bridge dc/dc converter is proposed. Voltage across the
switches is clamped without an active clamp or passive snubber.
It makes a reduction in size and cost. It improves the converter
efficiency by ZCS of primary devices, zero-current turn-on of all
devices, and natural commutation of secondary diodes and body
diodes of primary devices. Switching transition losses are
significantly reduced. It has negligible circulating current and
lower conduction losses and, therefore, is expected to show
better light load efficiency than hard switching.
Proposed system:
In this paper, an extended secondary universal current-fed
converter (ESUC) is proposed that operates with ZVS and zero
current switching (ZCS) and can achieve output voltage
regulation with a wide input voltage and load variation. The
converter is claimed to be universal as it can accommodate input
voltage variations in the ratio of 1:3 compared with conventional
converters. Moreover, the range can be further extended by
slight modifications in secondary-circuit design. To achieve
load voltage regulation, hybrid fixed frequency modulation is
proposed.

3. Do Your Projects With Domain Experts…
Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Block diagram:
BUFFER
circuit
5VDC
PIC controller
circuit
Gate driver circuit
12 V
DC
INPUT
DC supply
High
frequency
transformer
Load
Current fed
converter
Current fed
converter
Rectifier
and filter

4. Do Your Projects With Domain Experts…
Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Advantages:
 Minimizing the overall switching losses.
 Reduces the current stress.
Applications:
 Solar photovoltaic (PV).
 Fuel cell.
Tools and software used:
 MPLAB – microcontroller programming.
 ORCAD – circuit layout.
 MATLAB/Simulink – Simulation.