Recent Activities of Frontiers in Education Committee of IEE Japan, from 2019 to 2020
論文No: ページ数: 2 日付: 2021/01/01
著者: 中村 格（鹿児島工業高等専門学校 電気電子工学科）
キーワード : 教育フロンティア，倫理委員会，初等中等教育支援WG Frontiers in Education，Ethics Committee，Primary/Secondary Education Support WG
In Frontiers in Education Committee, we are working on widely problems of engineering education in present-day Japan. About education or social contribution, there are many problems which should be solved, coped with and ... more
Recent Activities of History of Electrical Engineering Committee (HEE)
論文No: ページ数: 3 日付: 2021/01/01
著者: 日髙 邦彦（東京電機大学 大学院工学研究科）
キーワード : 電気技術史，オーラルヒストリー，21世紀における電力系統技術，卓越研究データベース，ニューズレター，国際活動 history of electrical engineering，oral history，power systems in the 21st century，database on noteworthy contribution for science and technology，newsletter，international activities
The main objective of HEE is to examine the direction in which electrical engineering should move in the years ahead by studying the past. Electrical engineering history constitutes the basis of technologies that we shou ... more
Activities of Technical Committee on Electromagnetic Theory and Introduction of Its Research Topics
論文No: ページ数: 2 日付: 2021/01/01
著者: 松島 章（熊本大学）
キーワード : 電磁界理論技術委員会の活動，研究事例 activities of Technical Committee on Electromagnetic Theory，research topics
This report briefly presents activities of Technical Committee on Electromagnetic Theory (EMT), IEEJ. Our committee is now implementing the activities on 2020, which includes three times of the technical committee meetin ... more
The technical committee on electromagnetic compatibility (EMC) was established under the Fundamentals and Materials Society (FMS), the Institute of Electrical Engineers in Japan (IEEJ) in 1999. Since then, researches and ... more
This report introduces recent activities of the Technical Committee on Electrical Discharges, Plasma, and Pulsed Power (EPP). The major research subjects and aims of the technical committee on EPP, and the recent activit ... more
This article reports the topics of the field in light application and visual science, the activities of the technical committee (TC-LAV) and the introduction of research of technical meeting on light application and visu ... more
The IEEJ Technical Committee on Instrumentation and Measurement has explored key technologies in this field through technical meetings and research committees. Its recent activities and some leading research results are ... more
Latest Trend and Front Line in Research Field of Dielectrics and Electrical Insulating Materials－Topics from the International Symposium on Electrical Insulating Materials (ISEIM2020)－
This article picks up the topics at the 9th International Symposium on Electrical Insulating Materials (ISEIM2020) hosted by Technical Committee on Dielectrics and Electrical Insulation (TC-DEI) in IEEJ in order to overv ... more
Recently the number of integrated superconductor qubits and the fidelity in the qubit control are rapidly advanced. Besides the quantum supremacy, which is a remarkable milestone for realizing a large-scale quantum compu ... more
The authors describe the recent activities of the Technical Committee on Magnetics, IEEJ. In this paper, the recent research and development on the advanced permanent magnet materials and their applications are reported.
Numerical Calculation of Low-frequency Magnetic Field on Three-dimensional Orthogonal Equidistant Grid by Barnes-Hut Tree Method Executed in Reverse Order
論文No: ページ数: 10 日付: 2021/01/01
著者: 濱田 昌司（関西大学システム理工学部電気電子情報工学科）
キーワード : 低周波磁界，ツリー法，逆手順版ツリー法，三次元直交等間隔格子 low-frequency magnetic field，Barnes-Hut tree method，tree method executed in reverse order，three-dimensional orthogonal equidistant grid
In this paper, we undertake the numerical calculation of 50-Hz magnetic fields on three-dimensional orthogonal equidistant grids. The usual calculation method using the Biot-Savart law (BS) is accelerated by the Barnes-H ... more
Polytetrafluoroethylene (PTFE) has excellent characteristics. By utilizing these characteristics, PTFE is applied in various fields. In recent years, PTFE has attracted attention for the application to a flexible printed ... more
This paper described partial discharge (PD) current waveforms in SF6 gas measured with a super high frequency wideband measurement system (SHF_PDPW system) with changing the electrode system to control the electric field ... more
A high voltage and high current pulse switch using avalanche mode thyristor has been developed for the high voltage pulse generator. When the break-over voltage is applied to a thyristor, the thyristor turns on without t ... more
Space charge accumulation behavior in fullerene added epoxy resin is observed at high temperature under high voltage. Space charge accumulation is said that it strongly affect the dielectric breakdown of insulating mater ... more
Vanadium dioxide (VO2) thin films were fabricated by metal-organic decomposition (MOD). To utilize a carbon thermal reduction for obtaining a VO2 composition, the precursor films were fabricated at the temperature Tp fro ... more
A Novel Power Loss Calculation Method for Power Magnetic Components in Power Converters
論文No: ページ数: 7 日付: 2021/01/01
著者: 石倉 祐樹（（株）村田製作所／名古屋大学），細谷 達也（（株）村田製作所／名古屋大学），山本 真義（名古屋大学）
キーワード : パワーコンバータ，電力磁気部品，電力損失算出法，B-Hループ，鉄損 power converter，power magnetic components，power loss calculation method，B-H loop，iron loss
This paper reports a power loss calculation method for magnetic components in power converters. The differences in B-H loop areas are analyzed and discussed in case of sinusoidal waveform and square wave voltage excitati ... more
Study on Artificial Water Tree Degradation Method for XLPE Power Cables (Part 2)－Proposal of Method for Water Tree Propagation under Continuous Heating and Heat Cycle Conditions－
In order to determine the effective temperature condition for artificially accelerating propagation of harmful water trees in insulation of 3.3 to 77 kV XLPE cables, an AC voltage of 13 kV and 1200 Hz was applied to a 22 ... more
What is “Erekiteru (Oelekitere)”, Friction Generator, for People in Edo Period ?
論文No: ページ数: 7 日付: 2021/01/01
著者: 西村 亮（鳥取大学工学部電気情報系学科）
キーワード : エレキテル，平賀源内，江戸時代，電気技術史，静電気 friction generator，Hiraga Gennai，Edo period，history of electric engineering，electrostatics
A friction generator was firstly introduced to Japan in 1765 in a book describing about European culture. This generator was called “Erekiteru (Oelekitere)” in the book and introduced as a medical equipment. Hiraga Genna ... more
The cross-linked polyethylene (XLPE) cable has been used for DC transmission lines. We have been developing the DC XLPE cable for a few decades, and proved its quality and reliability through the research and development ... more
To solve energy and environmental issue, Variable Renewable Energy (VRE) has been greatly promoted and power flow in transmission system becomes more uncertain due to VRE output fluctuation. N-1 criterion has been applie ... more
Conductive objects insulated from the ground under DC transmission lines are electrified by the flow of ions supplied by corona discharge on the surface of the line conductor. The charge voltage of a human body as a resu ... more
A charging potential of a floating electrode modeled on vacuum interrupter was measured under unipolar AC voltage application using a surface potential meter. As a result, when a lower voltage was applied to the samples, ... more
This paper proposes a novel control method for the shunt capacitor equipped with a series inverter (ISC) in order to use with existing shunt capacitors in parallel. The proposed method controls the equivalent impedance o ... more
Objects or human bodies under DC overhead transmission lines may be charged with ion flow due to corona discharge generated on the surface of charged conductors. Ion flow electrification is an important considerations in ... more
This paper reviews production testing issues for analog and mixed-signal SoC in IoT era for analog circuit designers, and also introduces research examples including authors' group research results in this area. Notice t ... more
Low noise amplifiers (LNAs) are a crucial component of RF circuits such as receivers. The noise figure (NF) determines on LNA performance. There are several different noise cancellation techniques. For example, to reduce ... more
In this paper, we propose the expanding technique of the ΔΣ ADC dynamic range by changing a feedback coefficient. The feedback coefficient is switched from 1 to 0.5 according to the input signal voltage value. It can imp ... more
The frequency error and the phase noise decide on the performance of PLL. The phase noise of PLL is proportional to jitter. The jitter is degraded due to the dead time of the phase detector. In this paper, we proposed th ... more
The grid connection inverter is built in the PCS (Power Conditioning Subsystem) for the distributed power supply, such as photovoltaic system. Recently, the researches on power flow using PCS have been advanced. In order ... more
