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Multi mosfet-based series resonant inverterfor improved efficiency and power density induction heating applications
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MULTI-MOSFET-BASED SERIES RESONANT INVERTER FOR IMPROVED
EFFICIENCY AND POWER DENSITY INDUCTION HEATING APPLICATIONS
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 “MULTI-MOSFET-BASED SERIES RESONANT
INVERTER FOR IMPROVED EFFICIENCY AND POWER DENSITY INDUCTION
HEATING APPLICATIONS” 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 “MULTI-MOSFET-BASED SERIES
RESONANT INVERTER FOR IMPROVED EFFICIENCY AND POWER DENSITY
INDUCTION HEATING APPLICATIONS” 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 “MULTI-MOSFET-BASED SERIES RESONANT
INVERTER FOR IMPROVED EFFICIENCY AND POWER DENSITY INDUCTION
HEATING APPLICATIONS” 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:
Resonant converters featuring soft switching are commonly used in domestic induction
heating applications due to their high efficiency and high power density. In this paper, the design
and implementation procedure of an improved efficiency and lowprofile resonant inverter for
induction heating applications is presented. The proposed converter is based on a multi-
MOSFET cell implementation, reducing the equivalent on-state resistance per chip-area. By
using automotive-grade MOSFET devices, a converter capable of delivering up to 4 kW has
been built, reducing conduction losses against the classical IGBT-based converter. In addition to
this, the reduced switching times of MOSFET devices decrease switching losses, further
increasing the conversion efficiency. The main design challenges including the device selection,
gate drive circuit, and cooling have been addressed. As a conclusion, a low-profile
implementation without fan and heat sink is obtained, which significantly improves state-of-the-
art technology in terms of efficiency and power density
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INTRODUCTION:
Domestic induction heating (IH) has become the technology of choice of many users due
to its improved properties in terms of efficiency, quickness, safety, cleanness, and accurate
power control. Advances in power electronics, digital control, and magnetic component design
have allowed designing reliable products with improved user performance.
Unlike classical solutions, the pot is directly heated by means of a varying magnetic field
in the range of the kilohertz, requiring a specific power electronic converter.
The main design constrains of this converter are derived from the reduced enclosure, the
limited cooling capabilities, and the high output power levels,requiring the use of high-efficiency
and high power density converters.
In this paper,a high-efficiency and high power density seriesresonant inverter is proposed
that significantly improves efficiency and reduces cooling requirements, obtaining an
implementation that does not require a heat sink and fan.The proposed converter is based on the
half-bridge topology,where each switching device is implemented by means of a multi-MOSFET
cell.
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EXISTING SYSTEM:
Classical IH solutions are based on two separated stages: a rectifier plus a resonant
inverter. First, a four-diode full bridge rectifier is commonly used to rectify the mains ac
voltage. A small value dc-link capacitor is used to ensure an input power factor close to 1. Thus,
a high-ripple dc-link voltage is used to supply an inverter stage. Consequently, the switching
devices must withstand higher current levels, whereas the required filter stage is minimized.
Considering the typical output power level and the operating frequency range, the half-bridge
series resonant inverter (HB-SRI) featuring insulated-gate bipolar transistors (IGBTs) is
commonly used for the domestic IH applications
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PROPOSED SYSTEM:
Resonant converters featuring soft switching are commonly used in domestic induction
heating applications due to their high efficiency and high power density. In this paper, the design
and implementation procedure of an improved efficiency and low profile resonant inverter for
induction heating applications is presented.The proposed converter is based on a multi-MOSFET
cell implementation, reducing the equivalent on-state resistance perchip-area. By using
automotive-grade MOSFET devices, a converter capable of delivering up to 4 kW has been built,
reducing conduction losses against the classical IGBT-based converter.In addition to this,the
reduced switching times of MOSFET devices decrease switching losses, further increasing the
conversion efficiency.The proposed converter is based on the half-bridge topology, where each
switching device is implemented by means of a multi-MOSFET cell.The series operation of
power devices has been successfully used in the past for other applications either using IGBTs or
MOSFETs
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ADVANTAGES:
High conversion efficiency and power density.
Reduced switching losses.
Cooling requirements are reduced.
Cost effective driver circuit
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CONCLUSION:
In this paper, a novel approach based on the series operation of low-voltage MOSFET
has been successfully proposed. By using low-voltage MOSFET devices, an implementation
capable of delivering up to 4 kW without fan and heat sink is achieved for the domestic IH
application. In addition to this, the reduced switching times of MOSFET devices decrease
switching losses, further increasing the conversion efficiency, which reaches levels up to 98%,
whereas the maximum efficiency level in the classical converter is 94.9%.
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REFERENCES:
[1] O. Luc´ıa, J. Acero, C. Carretero, and J. M. Burd´ıo, “Induction heating appliances: Towards
more flexible cooking surfaces,” IEEE Ind. Electron. Mag., vol. 7, no. 3, pp. 35–47, Sep. 2013.
[2] O. Jim´enez, O. Lucia, I. Urriza, L. A. Barrag´an, P. Mattavelli, and D. Boroyevich, “FPGA-
based gain-scheduled controller for resonant converters applied to induction cooktops,” IEEE
Trans. Power Electron., vol. 29, no. 4, pp. 2143–2152, Apr. 2014.
[3] O´ . Luc´ıa, J. M. Burdio, L. A. Barraga´n, C. Carretero, and J. Acero, “Series resonant
multiinverter with discontinuous-mode control for improved light-load operation,” IEEE Trans.
Ind. Electron., vol. 58, no. 11, pp. 5163– 5171, Nov. 2011.
[4] O. Luc´ıa, P. Maussion, E. Dede, and J. M. Burd´ıo, “Induction heating technology and its
applications: Past developments, current technology, and future challenges,” IEEE Trans. Ind.
Electron., vol. 61, no. 5, pp. 2509– 2520, May 2014.
[5] O. Luc´ıa, I. Cvetkovic, H. Sarnago, D. Boroyevich, P. Mattavelli, and F. C. Lee, “Design of
home appliances for a dc-based nanogrid system: An induction range study case,” IEEE J.
Emerging Sel. Topics Power Electron., vol. 1, no. 4, pp. 315–326, Dec. 2013.