学术活动发布与订制系统

摘要：The series chopper type power train for EV is proposed for aiming the increase of one battery charge driving range for any type of battery. An ultrahigh efficient chopper ( called HEECS, efficiency over 99%, around 20kw ) was proposed with several circuit topologies. The proposed effect was verified at a motor-test bench, which can simulate the practical EV, and the proposed power train was experimentally compared between with and without the chopper. The second very high efficient system is the wireless energy transmission for electric trains aiming the elimination of the pantograph. A coaxial type transformer with air gap is proposed and after optimization of the structural and electrical parameters, a very high efficiency (over 96%) was realized with a few hundred power [W] range. A video will be provided for a mini model train. The third topic is related to A Novel Electromagnetic Linear Actuator with Inner and Outer Stators and One Moving Winding for Tactile Display.

Atsuo Kawamura received the Ph.D. in electrical engineering from the University of Tokyo in 1981. After the five-year-stay at the University of Missouri-Columbia as a faculty member, he joined Yokohama National University in 1986, and in 1996 he became a professor. From 2013 to 2015 he was a dean of College of Engineering Science and also a dean of Graduate School of Engineering at Yokohama National University. His interests are in the fields of power electronics, digital control, electric vehicles, and biped robotics. He received Transactions Paper Awards from IEEE in 1988, 2001 and 2002, also from IEE of Japan in 1996. Dr. Kawamura is an IEEE Fellow, and also a Fellow of the IEE of Japan. He served as a president of IEEJ/IAS from May 2012 to May 2013.

摘要：Multi-level converters have been studied actively in recent years. They have some attractive features such as lower voltage stress of each semiconductor power device, lower output harmonics, and lower EMI compared with the general 2-level converters. These features contribute to improve the control performance in some applications. In this study, it is verified that the multi-level converter is useful to realize extremely high-performance control in a motion control system. For the next step, the multi-level converter is also expected to enhance the performance of high-speed power flow control in the micro grid applications.

Hidemine Obara received the Bachelor, Master, and Ph.D. degrees in electrical and electronics engineering from Chiba University, Japan, in 2010, 2012, and 2015, respectively. From Oct. 2015 to Mar. 2016, he was a postdoctoral researcher in Tokyo Metropolitan University. From Apr. 2016, he is with Yokohama National University as an assistant professor. His research interests are mainly circuit topology, system integration, and implementation of power converters. Dr. Obara is a member of IEEE and IEE of Japan.