Three-Phase On-board Charger with Three Modules of Single-stage Interleaved Soft-switching AC-DC Converter Byeongwoo Kim, Hyojun Kim and Sewan Choi Department of Electrical and Information Engineering Seoul National University of Science and Technology Seoul, Korea

Three-Phase On-board Charger with Three Modules of Single-stage Interleaved Soft-switching AC-DC Converter 
Byeongwoo Kim, Hyojun Kim and Sewan Choi 
Department of Electrical and Information Engineering Seoul National University of Science and Technology Seoul, Korea

 Abstract— This paper proposes a new three-phase on-board charger with three modules of single-phase single-stage interleaved soft-switching ac-dc converter. Each module has single-stage structure with reduced component counts. It achieves ZVS turn-on of all switches and ZCS turn-off of all diodes. Eliminating the low frequency component in the battery charging current, the proposed converter is able to charge the battery with dc current. A balancing control algorithm is proposed to limit the excessive current through each module caused by unbalanced three-phase input voltage. A preliminary prototype of the proposed converter has been built and tested to verify the validity of the proposed concept. 

Keywords—Three-phase; single-phase module; on-board charger; OBC; EV charger; single-stage; balancing control

I. INTRODUCTION 
The on-board battery charger is a key equipment that delivers power from the grid to the propulsion battery in electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs)[1]. Nowadays, the on-board battery charger available on the market is mostly plugged into single phase grid, and the power rating is in the range between 3kW and 3.5kW[2]-[3]. They should have high efficiency and high power density to maximize the energy utilization and the distance covered per charge. However, a 3kW battery charger requires a charging time of 5 to 8 hours to fully charge the EV battery. There has been a need for on-board battery chargers with higher power rating in order to reduce charging time. In regard to these concerns, a three-phase on-board battery charger with increased power rating has emerged [4]-[7]. The three phase battery charger composed of a three-phase PFC and the dc-dc converter has reduced component count, but cannot be plugged into single phase grid with full power capability[4]. The automobile industry is demanding on-board chargers to have capability of operating at full power with both single-phase grid and three-phase grid. This can be achieved by connecting three traditional 3kW single-phase modules in parallel for single-phase grid or connecting them in delta or wye for threephase grid.
LINK FULL PAPER
http://pefcl.snut.ac.kr/upload/study02/963a904e850b90ea083bd24125a5e234.pdf

SEPOC2018-Panel Discussion 02: O Papel dos Institutos Nacionais de C&T no Fomento à P&D e Inovação no Brasil: Oportunidades para a universidade e a indústria-23 de outubro às 15:35 · UFSM

SEPOC 2018 está em UFSM Santa Maria. 23 de outubro às 15:35 · Santa Maria · ATENÇÃO!! Transmissão do segundo painel de discussão ao vivo via plataforma multiweb pelo link: http://farol.ufsm.br/transmissao/sepoc-2018-23102014-1330h 15:30 -
 Panel Discussion 02: 
O Papel dos Institutos Nacionais de C&T no Fomento à P&D e Inovação no Brasil: Oportunidades para a universidade e a indústria.
 SPEAKERS: Prof. Leandro Michels (UFSM), Prof. José Luiz Rezende Pereira (UFJF, INERGE), Prof. Luis Antônio Aguirre (UFMG), Marcelo Cabral Cavalcanti (UFPE, SOBRAEP), Prof. Odir Dellagostin (UFPEL, FAPERGS), Prof. Osvaldo Saavedra (UFMA, SBA).

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SEPOC2018-11th SEMINAR ON POWER ELECTRONICS AND CONTROL-Plenary Session 2: Dual DC nanogrid with interlink converter-Speaker: Prof. Luiz Lopes Concordia University, Canada

 SEPOC 2018-SANTA MARIA RS BRAZIL 21-24 OCTOBER 2018 Plenary Session 2: Dual DC nanogrid with interlink converter


Abstract:
The concept of nanogrids is suitable for application in net-zero energy homes. These should produce as much energy, ideally from renewables, as they consume. Ideally, they should be grid connected while capable of operating autonomously. Thus, appropriate means for energy storage and management are essential. In this talk, the conventional AC nanogrid is briefly discussed and then DC nanogrids are introduced. The basic characteristics of single-bus DC nanogrids are presented including power electronic interfaces controlled in a decentralized way with a hierarchical structure based on DC bus signaling (DBS). The alternative of a Dual DC bus system with power sources and storage units are employed in both buses is discussed. Bi-directional power flow between buses is achieved by means of an interlink converter. The concept of a protection system based on the coordination of power electronic interfaces and contactors suitable for DC nanogrids is introduced. Speaker: Prof. Luiz Lopes Concordia University, Canada Luiz Lopes obtained his M.A.Sc. degree from UFSC (Brazil) in 1989 and the PhD degree from McGill University (Canada) in 1996. From 1996 to 2001 he was an Associate Professor with UFPA (Brazil). He joined the department of Electrical and Computer Engineering of Concordia University (Canada) in 2002, where he is a Professor. He has been an invited professor at EPFL (Switzerland), Université de Toulouse (France), SUPELEC (France) and UTBM (France). His expertise includes power electronics, renewable energy systems and distributed power generation. He has published more than 140 papers in refereed journals and conference proceedings and trained more than 40 graduate students. His research has been supported by NSERC (Discovery Grant, CRD, Engage), government agencies/laboratories (CanmetENERGY) and industry partners (ALCOA, Geodata, Bombardier, TM4, OPAL-RT, THALES). Dr. Lopes was a technical representative for Canada in Task 11 “PV Hybrid Systems within Mini-grids” of IEA-PVPS and leader of Activity 21 on mini-grid stability. He is a member of the international advisory board of Efficacity, French urban energy transition Institute. Dr. Lopes is a senior member of the IEEE and a member of the Ordre des Ingénieurs du Québec.

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 SEPOC 2018 
The 11th Seminar on Power Electronics and Control will take place in Santa Maria, RS, from 21 to 24 October, 2018. In this year, it is organized by the IEEE Organizational Units from the Federal University of Santa Maria (UFSM). The seminar’s objective is to provide interaction among academia and industry to discuss the latest cutting-edge technologies on Power Electronics, Control, Electrical Power Systems and their applications. In 2018, the conference is themed on “Connecting Academia and Industry: the Key to Technological Development”. The event is open to the national and international community, being a great opportunity for technical discussions and bringing together researchers, engineers, entrepreneurs, and students. Through this, it links research and development to technological innovation, especially in the areas of Intelligent Systems, Power Electronics, Control and Automation, and Power Systems. SEPOC 2018 will consist of technical sessions with presentations of scientific papers (previously evaluated by reviewers and the Technical Committee), panel discussions, special sessions, and plenary sessions. Renown speakers from around the globe will participate giving their contribution on different fields. The conference will also count with a social program including coffee breaks, an opening cocktail, and the conference dinner.