Hybrid modulated extended secondary universal current fed zvs converter for wide voltage range analysis design and experimental results

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IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT
HYBRID MODULATED EXTENDED SECONDARY UNIVERSAL CURRENT-FED
ZVS CONVERTER FOR WIDE VOLTAGE RANGE: ANALYSIS, DESIGN, AND
EXPERIMENTAL RESULTS
By
A
PROJECT REPORT
Submitted to the Department of electronics & communication Engineering in the
FACULTY OF ENGINEERING & TECHNOLOGY
In partial fulfillment of the requirements for the award of the degree
Of
MASTER OF TECHNOLOGY
IN
ELECTRONICS & COMMUNICATION ENGINEERING
APRIL 2016

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CERTIFICATE
Certified that this project report titled “HYBRID MODULATED EXTENDED SECONDARY
UNIVERSAL CURRENT-FED ZVS CONVERTER FOR WIDE VOLTAGE RANGE:
ANALYSIS, DESIGN, AND EXPERIMENTAL RESULTS” is the bonafide work of Mr.
_____________Who carried out the research under my supervision Certified further, that to the
best of my knowledge the work reported herein does not form part of any other project report or
dissertation on the basis of which a degree or award was conferred on an earlier occasion on this
or any other candidate.
Signature of the Guide Signature of the H.O.D
Name Name

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DECLARATION
I hereby declare that the project work entitled “HYBRID MODULATED EXTENDED
SECONDARY UNIVERSAL CURRENT-FED ZVS CONVERTER FOR WIDE
VOLTAGE RANGE: ANALYSIS, DESIGN, AND EXPERIMENTAL RESULTS”
Submitted to BHARATHIDASAN UNIVERSITY in partial fulfillment of the requirement for
the award of the Degree of MASTER OF APPLIED ELECTRONICS is a record of original
work done by me the guidance of Prof.A.Vinayagam M.Sc., M.Phil., M.E., to the best of my
knowledge, the work reported here is not a part of any other thesis or work on the basis of which
a degree or award was conferred on an earlier occasion to me or any other candidate.
(Student Name)
(Reg.No)
Place:
Date:

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ACKNOWLEDGEMENT
I am extremely glad to present my project “HYBRID MODULATED EXTENDED
SECONDARY UNIVERSAL CURRENT-FED ZVS CONVERTER FOR WIDE
VOLTAGE RANGE: ANALYSIS, DESIGN, AND EXPERIMENTAL RESULTS” which is
a part of my curriculum of third semester Master of Science in Computer science. I take this
opportunity to express my sincere gratitude to those who helped me in bringing out this project
work.
I would like to express my Director, Dr. K. ANANDAN, M.A.(Eco.), M.Ed., M.Phil.,(Edn.),
PGDCA., CGT., M.A.(Psy.) of who had given me an opportunity to undertake this project.
I am highly indebted to Co-Ordinator Prof. Muniappan Department of Physics and thank from
my deep heart for her valuable comments I received through my project.
I wish to express my deep sense of gratitude to my guide
Prof. A.Vinayagam M.Sc., M.Phil., M.E., for her immense help and encouragement for
successful completion of this project.
I also express my sincere thanks to the all the staff members of Computer science for their kind
advice.
And last, but not the least, I express my deep gratitude to my parents and friends for their
encouragement and support throughout the project.

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ABSTRACT:
A soft-switching extended secondary universal current-fed converter (ESUC) has been
proposed, analyzed, and designed. The proposed converter accommodates a wide source voltage
range to cover several sources to interface through extended secondary-circuit and hybrid
modulation. Proposed fixed frequency hybrid modulation and design achieves soft-switching of
semiconductor devices under all operating conditions. It is therefore suitable to be universally
adopted for solar photovoltaic (PV), fuel cell, and battery applications. Current-fed technology is
suitable for such sources (low voltage, high current). Experimental results are illustrated to verify
the claims and to show the performance of the converter over a wide input voltage range of 20–
60 V with load variation

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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
In this paper, an extended secondary universal current-fed converter (ESUC) is proposed
that operates with ZVS and zerocurrentswitching (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.
Thus, it is seen as a potential candidate for interfacing solar panels (20–42 V), fuel cells
(22–41 V), and batteries (24/36/48/60 V) with load. To achieve load voltage regulation, hybrid
fixed frequency modulation is proposed.

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Hybrid fixed frequency modulation consists of: 1) primarycircuit duty-cycle modulation
(fixed secondary-circuit duty cycle) that is active for PV, fuel cells, and batteries with voltage
below 42 V; and 2) secondary-circuit duty cycle modulation that is active for input voltage above
42 V, i.e., 48/60 V batteries or two series-connected solar panels.
For input voltage of 40–60 V, the duty cycle of primary-circuit devices is fixed at 55%,
whereas the duty cycle of the secondary devices is varied to regulate the load voltage, i.e., full or
partial utilization of the secondary side. It makes the proposed converter promising for different
sources with different voltage ranges.

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EXISTING SYSTEM:
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

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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

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ADVANTAGES:
 Minimizing the overall switching losses.
 Reduces the current stress

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BLOCK DIAGRAM:

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TOOLS AND SOFTWARE USED:
 MPLAB – microcontroller programming.
 ORCAD – circuit layout.
 MATLAB/Simulink – Simulation

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APPLICATIONS:
 Solar photovoltaic (PV).
 Fuel cell.
 Battery applications.
Gate driver circuit
High
frequency
transformer
Load
Current fed
converter
Current fed
converter
Rectifier
and filter

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CONCLUSION:
An ESUC converter that accommodates wide input voltage variation (1 : 3) has been
proposed. The range can be further converter for different operating conditions. extended by
modifying secondary-circuit design. Magnetizingminductance assists in maintaining ZVS of the
primary switches over this range. The secondary switches operate with ZCS, thus minimizing the
overall switching losses. The inherent current sharing property of a two-inductor topology and a
high Lp/Ls ratio reduces the current stress on the devices compared with voltage-fed pulsewidth
modulated and resonant soft-switching converters. Proposed hybrid modulation ensures load
voltage regulation over wide input voltage and load variation. Above all, a single converter can
be used for different sources such as batteries, fuel cells, solar PVs, etc.; therefore, it can be used
in several applications such as microgrid and distributed generation. The analysis and design of
the converter have been reported. Performance has been demonstrated through experimental
results.

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REFERENCES:
[1] J. Wang, F. Z. Peng, J. Anderson, A. Joseph, and R. Buffenbarger, “Low cost fuel cell
converter system for residential power generation,” IEEE Trans. Power Electron., vol. 19, no. 5,
pp. 1315–1322, Sep. 2004.
[2] R. J. Wai and R. Y. Duan, “High-efficiency power conversion for low power fuel cell
generation system,” IEEE Trans. Power Electron., vol. 20, no. 4, pp. 847–856, Jul. 2005.
[3] H. Tao, A. Kotsopoulos, J. L. Duarte, and M. A. M. Hendrix, “Transformer-coupled
multiport ZVS bidirectional DC-DC converter with wide input range,” IEEE Trans. Power
Electron., vol. 23, no. 2, pp. 771– 781, Mar. 2008.
[4] A. J. Mason, D. J. Tschirhart, and P. K. Jain, “New ZVS phase shift modulated full-bridge
converter topologies with adaptive energy storage for SOFC applications,” IEEE Trans. Power
Electron., vol. 23, no. 1, pp. 332–342, Jan. 2008.
[5] S. Jung, Y. Bae, S. Choi, and H. Kim, “A low cost utility interactive inverter for residential
fuel cell generation,” IEEE Trans. Power Electron., vol. 22, no. 6, pp. 2293–2298, Nov. 2007.

Hybrid modulated extended secondary universal current fed zvs converter for wide voltage range analysis design and experimental results

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Hybrid modulated extended secondary universal current fed zvs converter for wide voltage range analysis design and experimental results