著者
槇尾 榮
出版者
一般社団法人 電気学会
雑誌
電氣學會雜誌 (ISSN:00202878)
巻号頁・発行日
vol.42, no.408, pp.522-548, 1922 (Released:2008-11-20)

潜水艦用蓄電池に就て纒まつた論文はない、それは潜水艦自身が軍事上の機密として多く語られない結果である。著者は伊太利海軍並に佛國海軍から得たるDataと海軍潜艦蓄電池の經驗者との助言によつて著者自身の調査をも合せて本稿を起した。蓄電池の構造、及び特性、潜艦への据置についてこれ等は語うれてゐる。
著者
関口 慧 真木 康次 石黒 崇裕
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
巻号頁・発行日
vol.143, no.4, pp.313-322, 2023-04-01 (Released:2023-04-01)
参考文献数
25

This paper presents a theoretical discussion on a combined-compensation control method and its stability on harmonic resonance for grid-connected converters. The interaction between the grid impedance and the grid-connected converter potentially creates harmonic resonance. The compensation control with a combination of a digital filter and a virtual impedance is an effective solution for this problem. The theoretical analysis developed in this study reveals that the proper use of the two control schemes enhances the availability of grid-connected converters. Simulated results obtained from a three-phase high-power converter system verify this analysis.
著者
坂本 幸治 阿部 実
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.128, no.9, pp.598-601, 2008-09-01 (Released:2008-09-01)
参考文献数
5
被引用文献数
5 5

本記事に「抄録」はありません。
著者
伊藤 誠 須藤 哲也 高橋 暁史 原 崇文 岩野 龍一郎
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
巻号頁・発行日
vol.143, no.5, pp.398-404, 2023-05-01 (Released:2023-05-01)
参考文献数
22

In this study, a direct drive in-wheel system is proposed as a high power density system for reducing the intermediate parts, such as a speed reducer by increasing the torque. We propose a design strategy to show that multipolarization and the improvement of the gap magnetic flux density can effectively increase the power density. A Halbach array magnet rotor that combines the main electrode magnets and spoke magnets with the core is adopted as a technique for improving the gap magnetic flux density. We compare the Halbach array type rotor to the conventional SPM type rotor by using both of magnetic circuit calculation and FEM analysis. Moreover, the actual sized in-wheel motor prototype with the developed Halbach array magnet rotor is fabricated and measures the no-load induced back EMF. The measured no-load induced back EMF agrees well with the analyzed waveform.
著者
舟木 秀明 野下 裕市 庄山 正仁
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
巻号頁・発行日
vol.143, no.5, pp.425-432, 2023-05-01 (Released:2023-05-01)
参考文献数
17

Peak current-mode control is a control algorithm for switched-mode power supplies (SMPSs) that is characterized by high-speed response and high-stability. Currently, a method of implementing peak current-mode control in a digital controller has been proposed however, there is a limit to increasing the switching frequency. Therefore, in a previous study, we proposed a method that enables high-frequency switching by applying a control method called multi-cycle control, which applies the same ON duty ratio over multiple switching cycles to the existing method. Furthermore, in peak current-mode control, an unstable phenomenon called subharmonic oscillation occurs, which is problematic. Generally, this problem is solved by slope compensation however, it cannot be applied to multi-cycle control. Therefore, in previous work, we derived the condition to suppress subharmonic oscillation by designing parameters of multi-cycle control. In this study, we verified the above-mentioned conditions using a real-circuit.
著者
澤田 純兵 茂木 進一 南 政孝 道平 雅一
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.138, no.1, pp.86-87, 2018-01-01 (Released:2018-01-01)
参考文献数
3

Generally, in electric equipment, a large inrush current flows in the capacitor when the power is turned on. The inrush current causes deposition of terminals and switches, melting of fuses, and so on. Therefore, conventional inrush current prevention circuits using an electrical relay and a controller are provided. However, the use of electrical relay enhances concern about an increase in cost and charge-time. In order to solve these problems, this paper proposes the inrush current prevention circuit without electrical relay. In this paper, the authors examine the effectiveness of the proposed circuit from experimental results.
著者
札野 順
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.124, no.10, pp.630-633, 2004-10-01 (Released:2008-04-17)
参考文献数
15
被引用文献数
1 1
著者
畑 雅恭
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.123, no.9, pp.598-601, 2003-09-01 (Released:2008-04-17)
参考文献数
9
著者
田中 邦典
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.124, no.9, pp.583-586, 2004-09-01 (Released:2008-04-17)
被引用文献数
1 1
著者
佐伯 拓 谷口 誠治 中村 和広 飯田 幸雄
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)
巻号頁・発行日
vol.135, no.10, pp.559-564, 2015-10-01 (Released:2015-10-01)
参考文献数
19

An energy cycle using solar power and metals has been proposed. High repetitive laser pulses are generated by a solar-pumped laser or a laser generated using solar power, and the laser pulses are irradiated to metal oxides in liquid. We can obtain reduced metal nanoparticles with this method, and solar power is effectively stored as chemical energy. We fabricated Li air fuel cells using sintered Iron or Aluminum nanopaste plates as negative electrodes. Electricity was successfully produced from these cells. The observed maximum output voltage of the Al paste Li air cell was 2.9 V when they were connected to a low load. The Fe or Al paste Li air cells are expected to become common power supplies with high-energy density and high output power.
著者
甲斐 隆章
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.124, no.1, pp.27-31, 2004-01-01 (Released:2008-04-17)
参考文献数
9
被引用文献数
13 11
著者
中村 正人
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.131, no.4, pp.220-225, 2011-04-01 (Released:2011-04-01)
参考文献数
5

本記事に「抄録」はありません。
著者
青木 陽介 茂木 進一
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
巻号頁・発行日
vol.142, no.8, pp.620-626, 2022-08-01 (Released:2022-08-01)
参考文献数
25

Three-phase diode rectifiers have several advantages, such as simple topology, low amounts of high-frequency noise, high reliability, and high environmental durability. However, these rectifiers produce undesirable lower-order harmonics in the input currents. To overcome this problem, a three-phase choke-input-type diode rectifier with AC-side inductors is presented here, which meets to the regulations of JIS C 61000-3-2 (Class A). In this study, the three-phase diode rectifier (3.0kW, 200V/50Hz) is validated through experimental results.
著者
梶原 朋也 佐藤 勝 武山 真弓
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.142, no.7, pp.735-736, 2022-07-01 (Released:2022-07-01)
参考文献数
10

We aimed to evaluate the aging and deterioration of Japanese sake by its electrical properties. The time dependence of Japanese sake after opening the package was electrically measured. As a results, Japanese sake preserved in an environment that does not easily deteriorate tended to have little change in electrical properties.