Conductive Charging of Electrified Vehicles: Challenges and Opportunities-Joint Webinar with IEEE Transportation Electrification Community
Wednesday, 8 July 2020 8:00 AM ET
Presenter: Haoyu Wang of ShanghaiTech University, China
Abstract: The transportation sector consumes approximately 28% of the total energy consumption. The most prominent sustainable solution to profoundly reduce both oil consumption and greenhouse gas emissions lies in grid-enabled electric vehicles (EVs). These vehicles are propelled either partially or fully by electricity through energy storage systems such as electrochemical batteries, which need to be charged from the grid. One of the most important realities that will facilitate the adoption of grid-enabled plug-in EVs (PEVs) is the method by which these vehicles will be charged. Currently, conductive charging is the dominant charging technology in commercially available PEVs.
In this webinar, I will give an extensive overview of the conductive charging technology of PEV from the perspective of a power electronics professional. The background review covers the charging power levels, PEV charger architectures, charging profiles of Lithium-ion batteries, as well as the challenges and opportunities. Followed by is a comprehensive review of state-of-the-art emerging solutions to those technological challenges. The advanced topics include innovative circuit topologies, advanced control strategies, integrated architectures wide bandgap devices, and boosted power density with high switching frequency. Furthermore, I will give an introduction to our recent related research works. Finally, the webinar concludes with an outlook on future technology trends.
Biography: Dr. Haoyu Wang is an assistant professor and the director of Power Electronics And Renewable Energies Lab (PEARL) at ShanghaiTech University. Dr. Wang received his bachelor's degree in electrical engineering and distinguished honor degree in Mixed Class at Chu Kochen Honors College, from Zhejiang University in Hangzhou, China. He received his master's and Ph.D. degrees both in electrical engineering from the University of Maryland, College Park, MD, USA. He joined the School of Information Science and Technology at ShanghaiTech University as a tenure-track assistant professor in September 2014. He received the Outstanding Bachelor's Thesis Award from Zhejiang University, Hangzhou, China and the Distinguished Dissertation Fellowship from the Electrical and Computer Engineering Department at the University of Maryland, College Park, MD, USA. His research interests include power electronics, plug-in electric and hybrid electric vehicles, the applications of wide band-gap semiconductors, renewable energy harvesting, and power management integrated circuits.
Tuesday, 14 July 2020 10:00 PM ET (Wednesday, 15 July 2020 10:00 AM China)- Webinar will be in Chinese
Presenter: Jinjun Liu, Xi’an Jiaotong University (XJTU), Xi’an, China
Abstract/摘要: Electric energy systems entering into a new era have been experiencing many changes towards the future, among which turning into more electronic, i.e. integrating more and more electronic power converters, and incorporating more and more distributed generations are the two major ones. The technical challenges that power electronics will be facing accordingly are then identified one by one. The major issues caused by becoming more electronic and more distributed are discussed. The issues that are to some extent in dispute among different technical people with different backgrounds are also elaborated, including the concern about system inertia reduction, the worry about lower transient over-current tolerance, and the new system framework and specifications that need to be set up. Proposed power electronics solutions supported by most recent research results are illustrated in more detail in the end, with examples more concentrated in the area of communication-free coordinative control of paralleled interfacing inverters for distributed energy sources.
Biography /演讲人简历: Jinjun Liu received the B.S. and Ph.D. degrees in electrical engineering from Xi’an Jiaotong University (XJTU), Xi’an, China, in 1992 and 1997, respectively. He then joined the XJTU Electrical Engineering School as a faculty. From late 1999 to early 2002, he was with the Center for Power Electronics Systems, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, as a Visiting Scholar. In late 2002, he was promoted to a Full Professor and then the Head of the Power Electronics and Renewable Energy Center at XJTU, which now comprises 21 faculty members and over 150 graduate students and carries one of the leading power electronics programs in China. From 2005 to early 2010, he served as an Associate Dean of Electrical Engineering School at XJTU, and from 2009 to early 2015, the Dean for Undergraduate Education of XJTU. He is currently an XJTU Distinguished Professor of Power Electronics. He co-authored 3 books (including one textbook), published over 400 technical papers in peer-reviewed journals and conference proceedings, holds over 50 invention patents (China/US/Europe), and delivered for many times plenary keynote speeches and tutorials at IEEE conferences or China national conferences in the power electronics area. His research interests include modeling, control, and design methods for power converters and electronified power systems, power quality control and utility applications of power electronics, and micro-grids for sustainable energy and distributed generation.
Dr. Liu received for eight times governmental awards at the national level or provincial/ministerial level for scientific research/teaching achievements. He also received the 2006 Delta Scholar Award, the 2014 Chang Jiang Scholar Award, the 2014 Outstanding Sci-Tech Worker of the Nation Award, the 2016 State Council Special Subsidy Award, and the IEEE Transactions on Power Electronics 2016 Prize Paper Award. He served as the IEEE Power Electronics Society Region 10 Liaison and then China Liaison for 10 years, an Associate Editor for the IEEE Transactions on Power Electronics for 13 years, 2015-2019 Executive Vice President and 2020-2021 Vice President for membership of IEEE PELS. He is on the Board of China Electrotechnical Society and was elected the Vice President in 2013 and the Secretary-General in 2018 of the CES Power Electronics Society. Since 2013, he has been the Vice President for International Affairs, China Power Supply Society (CPSS) and since 2016, the inaugural Editor-in-Chief of CPSS Transactions on Power Electronics and Applications. Since 2013, he has been serving as the Vice-Chair of the Chinese National Steering Committee for College Electric Power Engineering Programs. Dr. Liu is a Fellow of IEEE.
How to Effectively use LinkedIn to Further One's Career
Wednesday, 22 July 2020 11:00 AM ET
Presenter: Roland Block, Texas A&M University, USA
Abstract: This presentation provides often hidden insights into LinkedIn. Novice to expert LinkedIn users find this presentation eye-opening. Topics include why LinkedIn is important, LinkedIn as a Research Tool for networking and finding opportunities, creating an effective profile, and developing a personal brand. Roland combines over a decade of practical LinkedIn skills, two decades of professional marketing experience, and career readiness perspective into a presentation 99%+ of surveyed attendees would recommend to a peer.
Biography: Roland has been using LinkedIn for over a decade and has presented at large regional meetings such as the Southern Association of Colleges and Employers (SoACE) and the Texas Co-operative & Internships Education Association (TxCEIA) on Unlocking LinkedIn’s Hidden Power. For the hundreds of student and professionals that have attended his LinkedIn presentation, over 99%+ found the presentation valuable and would recommend it to a peer.
Roland graduated from Texas A&M University with a B.S. in Mechanical Engineering. He joined the Career Center in 2017 following a successful 25-year career in the Medical Device Industry. With a passion for innovation, Roland has commercialized over 100 new products, received multiple patents, and was the R&D Project Manager and Marketing Product Manager concurrently for products grossing over $250 Million in sales. Roland earned Product Manager of the Year awards at two different companies within his first 12 years after college, trained 1,000s of sales reps and 100s of surgeons, and advanced to Director of Global Marketing roles for companies ranging from start-up to Fortune 300. Roland has adapted principals learned as an industry executive to lead the Texas A&M Career Center with respect to career readiness for its over 20,000 engineerings.
Friday, 31 July 2020 11:00 AM ET
Presenter: Yuhao Zhang, Virginia Tech, USA
Abstract: In the last decade, the power electronics landscape has been reshaped with the production and application of power devices based on wide-bandgap (WBG) semiconductors, such as gallium nitride (GaN) and silicon carbide (SiC). Besides advancing the performance of traditional power systems, WBG devices have also enabled many emerging applications that are beyond the realm of silicon (Si) as well as changed the manufacturing paradigm of power electronics.
This talk will present the development of next-generation WBG and ultra-wide-bandgap (UWBG) power devices as well as the switching-based ruggedness study of WBG devices. We recently developed a group of novel 1.2 kV GaN devices based on the vertical architecture, which has shown great promise to expand the application space of GaN into the medium-voltage realm. Besides GaN, our work on an emerging UWBG material, gallium oxide, has suggested new enabling capabilities of UWBG power devices for high-temperature applications. Finally, we will present our robustness study of WBG power devices, with an emphasis on new degradation mechanisms and device physics unveiled from the avalanche tests of GaN HEMTs and hard-switching-based accelerated tests of SiC MOSFETs.
Biography: Dr. Yuhao Zhang is an assistant professor with the Center for Power Electronics Systems (CPES) at Virginia Tech. Before joining CPES, he worked as a postdoctoral associate at Massachusetts Institute of Technology (MIT) from 2017 to 2018. He received his Ph. D. and S. M., both in electrical engineering from MIT in 2017 and 2013, respectively. Prior to joining MIT, he received his B.S. in physics from Peking University in 2011 with the highest honor. He received the MIT Microsystems Technology Laboratories Doctoral Dissertation Award in Spring 2017, for his impactful work on vertical GaN power devices. His research interest is at the intersection of power electronics, micro/nano-electronic devices, and advanced semiconductor materials.
Tuesday, 1 September 2020 1:00 PM ET
Presenter: Juan Rivas, Stanford University, USA
Abstract: With the commercialization of wide-bandgap power semiconductors, multi-MHz switching frequencies are more compelling and critical to meet new applications demanding leaps in power density and efficiency. In the past, studies of these converters reported significant gaps between measured and modeled performance, often attributed to dynamic RDS, ON in GaN HEMTs. In particular, the power semiconductors – which often drive thermal constraints – dissipated much more power than expected, rendering designs based on simulated values unusable. In soft-switched converters, which dominate at MHz frequencies, the semiconductor’s output capacitor is resonantly charged and discharged once per switching cycle. Recently, multiple papers have found significant losses from this process in silicon and wide-bandgap devices, explaining the unexpected power dissipation. With these losses known, the MHz-frequency design space can be reopened – if designers are careful about semiconductor selection. In this webinar, we will give the audience the tools to select the right device across material (GaN, SiC, or Si), device technology (super junction or trench), size (lower RDS, ON is not always better), and, in some cases, manufacturer. Further, we showcase how this selection drives thermal design, input voltage selection, and novel circuit topologies in a variety of high-performance demonstrations from 6.78 MHz all the way to 40.68 MHz.
Biography: Juan Rivas is an Assistant Professor at Stanford’s Electrical Engineering department. Before, he served as an Assistant Professor at the University of Michigan and worked for GE Global Research in the high-frequency power electronics group. He has extensive experience in the design of dc-dc power converters working at MHz frequencies. He has published peer-reviewed work on power converters reaching up to 100 MHz using Si and WBG devices. He obtained his doctoral degree from MIT in 2006. His research interests include power electronics, resonant converters, resonant gate drive techniques, high-frequency magnetics, and finding new applications for power converters.
Advancing Layout Tools to Support High Performance/High Frequency Electronic Design
Thursday, 24 September 2020 11:00 AM ET
Registration Link coming soon
Presenter: Eckart Hoene, Fraunhofer IZM, Germany
Abstract: Routing power electronic circuits for high-speed switching becomes very tricky, as parasitic effects gain relevance and influence system performance significantly. For example, some parts of the circuit have to be routed with low inductance, others for low coupling capacitance, proximity effects dominate losses, and so on. Although there are tools to calculate these kinds of effects it is not straight forward to use them during the design process. The transfer of the layout data to the calculation tool works seldom without rework and the tools need special knowledge to get the right results. Layout tool integrated evaluation features may offer a way out of this obstruction.
In the webinar, the performance relevant parasitics are gathered and ways to handle them in layout tools discussed. Solutions for ohmic losses in arbitrarily formed tracks and inductance are demonstrated.
Biography: Eckart Hoene received his M.S. degree in electrical engineering from Technical University (TU) Berlin, Germany, in 1997. He received his Ph.D. degree on the topic “ EMC of drive systems” from TU Berlin in 2001. He joined the Fraunhofer Institute for Reliability and Micro Integration, Berlin, as a scientific assistant and worked toward his Ph.D. degree simultaneously. He continued at Fraunhofer as a postdoc, group leader, and business development manager. In 2014, he became an adjunct professor at Aalborg University, Denmark, in addition to the courses he chairs for the European Center for Power Electronics and his Fraunhofer affiliation. The technical focus of his work is high switching frequencies in power electronics, packaging semiconductors, and electromagnetic compatibility. His group works mainly under contract with industry customers. He holds more than ten patents and is regularly invited to speak at conferences.