Abstract:
Flyback and forward converters are two commonly used topologies for isolated low-power applications. These converters are simple and cost effective and provide galvanic i...Show MoreMetadata
Abstract:
Flyback and forward converters are two commonly used topologies for isolated low-power applications. These converters are simple and cost effective and provide galvanic isolation, which make them desirable for low-power levels. In order to enhance the performance of these converters, planar transformers (PTs) can be used that feature lower height, considerably lower leakage inductance, excellent thermal characteristics, and repeatability. Selecting a proper winding arrangement for a PT is a significant challenge, in particular given the large capacitances involved in flat structures. While interleaved structures significantly reduce the ac resistance and leakage inductance of PTs, they also lead to very large interwinding capacitance, which produces significant levels of undesired common-mode (CM) noise that causes EMI problems. Reducing interwinding capacitance by using noninterleaved structures is not an ideal solution to the CM noise problem because of its side effects. Instead, this paper tackles the problem by proposing the concept of paired layers. According to this concept, there are layers in the primary and secondary sides that have the same dv/dt, and therefore, their overlapping does not generate CM noise. These layers can be used to design highly interleaved structures that not only have very low ac resistance and leakage inductance, but also generate almost zero CM noise, although they may have a very large interwinding capacitance. In addition, a detailed parasitic capacitance model of PTs is proposed, which analytically validates the proposed concept and method. The experimental results show that the proposed PTs not only have very low ac resistance and leakage inductance, but also generate extremely low levels of CM noise. Considering that the proposed PT has interwinding capacitance equal to 700 pF, it is very interesting to see that it generates significantly less CM noise than does a traditional wire-wound transformer that has only 10-pF parasitic...
Published in: IEEE Transactions on Power Electronics ( Volume: 33, Issue: 2, February 2018)
Funding Agency:
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
Mohammad Ali Saket (S’15) was born in Tehran, Iran. He received
the B.Sc. degree in electrical engineering from the Amirkabir University of Technology, Tehran, in 2009, and the M.Sc.
degree in power electronics from Sharif University of Technology, Tehran, in 2011. He is currently working toward the
Ph.D. degree with the University of British Columbia, Vancouver, BC, Canada.
He is involved in research on high-efficiency...Show More
Mohammad Ali Saket (S’15) was born in Tehran, Iran. He received
the B.Sc. degree in electrical engineering from the Amirkabir University of Technology, Tehran, in 2009, and the M.Sc.
degree in power electronics from Sharif University of Technology, Tehran, in 2011. He is currently working toward the
Ph.D. degree with the University of British Columbia, Vancouver, BC, Canada.
He is involved in research on high-efficiency...View more
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
Martin Ordonez (S’02–M’09) was born in Neuquen,
Argentina. He received the Ing. degree in electronics engineering from the National Technological University, Cordoba,
Argentina, in 2003, and the M.Eng. and Ph.D. degrees in electrical engineering from the Memorial University of
Newfoundland (MUN), St. John's, NL, Canada, in 2006 and 2009, respectively.
He is currently the Canada Research Chair in Power Converters for Ren...Show More
Martin Ordonez (S’02–M’09) was born in Neuquen,
Argentina. He received the Ing. degree in electronics engineering from the National Technological University, Cordoba,
Argentina, in 2003, and the M.Eng. and Ph.D. degrees in electrical engineering from the Memorial University of
Newfoundland (MUN), St. John's, NL, Canada, in 2006 and 2009, respectively.
He is currently the Canada Research Chair in Power Converters for Ren...View more
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
Navid Shafiei (S’11) was born in Isfahan, Iran. He received the
B.S. degree in electrical engineering from Kashan University, Kashan, Iran, in 2005, and the M.S. degree in electrical
engineering from Islamic Azad University, Najafabad, Iran, in 2011. He is currently working toward the Ph.D. degree
with the University of British Columbia, Vancouver, BC, Canada.
He was a Technical Designer with the Information and Communi...Show More
Navid Shafiei (S’11) was born in Isfahan, Iran. He received the
B.S. degree in electrical engineering from Kashan University, Kashan, Iran, in 2005, and the M.S. degree in electrical
engineering from Islamic Azad University, Najafabad, Iran, in 2011. He is currently working toward the Ph.D. degree
with the University of British Columbia, Vancouver, BC, Canada.
He was a Technical Designer with the Information and Communi...View more
Contents Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
Mohammad Ali Saket (S’15) was born in Tehran, Iran. He received
the B.Sc. degree in electrical engineering from the Amirkabir University of Technology, Tehran, in 2009, and the M.Sc.
degree in power electronics from Sharif University of Technology, Tehran, in 2011. He is currently working toward the
Ph.D. degree with the University of British Columbia, Vancouver, BC, Canada.
He is involved in research on high-efficiency and low parasitic integrated magnetic structures for resonant
dc–dc converters. His research interests include planar magnetics, conducted electromagnetic interference,
resonant converters, and wireless power transfer.
Mohammad Ali Saket (S’15) was born in Tehran, Iran. He received
the B.Sc. degree in electrical engineering from the Amirkabir University of Technology, Tehran, in 2009, and the M.Sc.
degree in power electronics from Sharif University of Technology, Tehran, in 2011. He is currently working toward the
Ph.D. degree with the University of British Columbia, Vancouver, BC, Canada.
He is involved in research on high-efficiency and low parasitic integrated magnetic structures for resonant
dc–dc converters. His research interests include planar magnetics, conducted electromagnetic interference,
resonant converters, and wireless power transfer.View more
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
Martin Ordonez (S’02–M’09) was born in Neuquen,
Argentina. He received the Ing. degree in electronics engineering from the National Technological University, Cordoba,
Argentina, in 2003, and the M.Eng. and Ph.D. degrees in electrical engineering from the Memorial University of
Newfoundland (MUN), St. John's, NL, Canada, in 2006 and 2009, respectively.
He is currently the Canada Research Chair in Power Converters for Renewable Energy Systems and Associate Professor
with the Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada. He
is also the holder of the Fred Kaiser Professorship on Power Conversion and Sustainability at UBC. He was an adjunct
Professor with Simon Fraser University, Burnaby, BC, Canada, and MUN. His industrial experience in power conversion
includes research and development at Xantrex Technology Inc./Elgar Electronics Corp. (now AMETEK Programmable Power in
San Diego, California), Deep-Ing Electronica de Potencia (Rosario, Argentina), and TRV Dispositivos (Cordoba,
Argentina). With the support of industrial funds and the Natural Sciences and Engineering Research Council, he has
contributed to more than 100 publications and R&D reports.
Dr. Ordonez is an Associate Editor of the IEEE Transactions on Power Electronics, a Guest Editor for the
IEEE Journal of Emerging and Selected Topics in Power Electronics, an Editor for the IEEE Transactions on
Sustainable Energy serves on several IEEE committees, and reviews widely for IEEE/IET journals and international
conferences. He was awarded the David Dunsiger Award for Excellence in the Faculty of Engineering and Applied Science
(2009) and the Chancellors Graduate Award/Birks Graduate Medal (2006), and became a Fellow of the School of Graduate
Studies, MUN.
Martin Ordonez (S’02–M’09) was born in Neuquen,
Argentina. He received the Ing. degree in electronics engineering from the National Technological University, Cordoba,
Argentina, in 2003, and the M.Eng. and Ph.D. degrees in electrical engineering from the Memorial University of
Newfoundland (MUN), St. John's, NL, Canada, in 2006 and 2009, respectively.
He is currently the Canada Research Chair in Power Converters for Renewable Energy Systems and Associate Professor
with the Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada. He
is also the holder of the Fred Kaiser Professorship on Power Conversion and Sustainability at UBC. He was an adjunct
Professor with Simon Fraser University, Burnaby, BC, Canada, and MUN. His industrial experience in power conversion
includes research and development at Xantrex Technology Inc./Elgar Electronics Corp. (now AMETEK Programmable Power in
San Diego, California), Deep-Ing Electronica de Potencia (Rosario, Argentina), and TRV Dispositivos (Cordoba,
Argentina). With the support of industrial funds and the Natural Sciences and Engineering Research Council, he has
contributed to more than 100 publications and R&D reports.
Dr. Ordonez is an Associate Editor of the IEEE Transactions on Power Electronics, a Guest Editor for the
IEEE Journal of Emerging and Selected Topics in Power Electronics, an Editor for the IEEE Transactions on
Sustainable Energy serves on several IEEE committees, and reviews widely for IEEE/IET journals and international
conferences. He was awarded the David Dunsiger Award for Excellence in the Faculty of Engineering and Applied Science
(2009) and the Chancellors Graduate Award/Birks Graduate Medal (2006), and became a Fellow of the School of Graduate
Studies, MUN.View more
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
Navid Shafiei (S’11) was born in Isfahan, Iran. He received the
B.S. degree in electrical engineering from Kashan University, Kashan, Iran, in 2005, and the M.S. degree in electrical
engineering from Islamic Azad University, Najafabad, Iran, in 2011. He is currently working toward the Ph.D. degree
with the University of British Columbia, Vancouver, BC, Canada.
He was a Technical Designer with the Information and Communication Technology Institute, Isfahan University of
Technology, Isfahan, from 2005 to 2013, where he was involved in design and implementation of resonant converters. His
current research interests include resonant converters and their application in pure electric vehicles.
Navid Shafiei (S’11) was born in Isfahan, Iran. He received the
B.S. degree in electrical engineering from Kashan University, Kashan, Iran, in 2005, and the M.S. degree in electrical
engineering from Islamic Azad University, Najafabad, Iran, in 2011. He is currently working toward the Ph.D. degree
with the University of British Columbia, Vancouver, BC, Canada.
He was a Technical Designer with the Information and Communication Technology Institute, Isfahan University of
Technology, Isfahan, from 2005 to 2013, where he was involved in design and implementation of resonant converters. His
current research interests include resonant converters and their application in pure electric vehicles.View more
