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Distinguished Lecturer

By Hirofumi Akagi

Title                                             : New Trends in Power Electronics for High-Power Applications
Speaker                                      : Prof. Hirofumi Akagi, Tokyo Institute of Technology, Tokyo, Japan
Date and time                             : Monday 15th December, 15:00 - 17:00
Venue                                          : KTH Royal Institute of Technology, Stockholm, Lecture Room M33
This talk lays emphasis on an overview of circuit configurations, controls and applications of the family of modular multilevel cascade converters for grid connections and electric-motor drives. It also presents experimental results obtained from a few different downscaled systems that were designed, constructed and tested in the speaker's laboratory. Moreover, this talk describes a 750-V, 100-kW, 20-kHz bidirectional isolated dc-dc dual-active-bride (DAB) converter with focus on conversion efficiency and power-loss breakdown. The dc-dc converter consists of four 1.2-kV, 400-A SiC-MOSFET/SBD dual modules and magnetic devices including a 20-kHz transformer with a nano-crystalline soft-magnetic material. The SiC dual (two-in-one) module used in this experiment is the same in appearance, that is, size, shape, and terminal/pin arrangement as the latest 1.2-kV, 300-A Si-IGBT dual module.
Hirofumi Akagi Biography:
Hirofumi Akagi, professor and vice dean of the school of engineering at the Tokyo Institute of Technology, is a leading researcher in power conversion systems and their application to industry, utility and transportation. He has pioneered the theory of instantaneous reactive power in three-phase circuits, referred to as the “p-q theory,” which has been applied to power conversion systems and active filters for power conditioning. In addition, Dr. Akagi invented hybrid active-passive filters, the system concept and operating principle of which have been applied to the hybrid active-passive filter used in the Yamanashi test line for Japan's super high-speed, magnetically levitated train system. An IEEE Fellow, Dr. Akagi holds nine patents – with five more pending, and has authored or co-authored more than 70 IEEE Transactions/Journals. Dr. Akagi has received four IEEE Transactions Prize Paper Awards, the IEEE William E. Newell Power Electronics Award and the IEEE Industry Applications Society Outstanding Achievement Award.
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