著者

中山 正人 福田 健一 荒木 拓人 恩田 和夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.125, no.2, pp.213-220, 2005-02-01

参考文献数

11

被引用文献数

2 2

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The secondary batteries for the electric vehicle (EV) generate much heat during rapid charge and discharge cycles, when the EV starts quickly consuming the battery power and stops suddenly recovering the inertia energy. The generated heat increases significantly the cell temperature and causes possibly bad influences on the battery performance and the safely requirement. So we have studied the thermal behavior of nickel/metal hydride (Ni/MH) battery during rapid charge and discharge cycles, applying our previous battery thermal model, which have been confirmed to agree with the experimental results at smaller charge current than the rated current. The heat sources by the entropy change, the hydrogen occlusion and the side reaction have been referred to the published data, and the overpotential resistance and the current efficiency, the ratio of main reaction current to charge current, have been measured experimentally through the rapid charge and discharge characteristics with constant current. By using these data our thermal model for Ni/MH battery has estimated its temperature increase, which agrees well with the measured temperature rise, with the root mean square error of 1.5°C and 2.1°C for charge and discharge cycles, respectively.

著者

吉江 則彦

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.117, no.5, pp.285-286, 1997-04-20 (Released:2008-04-17)

参考文献数

1

著者

佐藤 浩之助

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.107, no.11, pp.1101-1106, 1987-11-20 (Released:2008-04-17)

参考文献数

5

著者

大西 公平

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.133, no.5, pp.268-269, 2013-05-01 (Released:2013-05-01)

参考文献数

6

被引用文献数

14

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本記事に「抄録」はありません。

著者

山崎 克巳 春石 善久 荒 隆裕

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.124, no.11, pp.1155-1163, 2004 (Released:2005-02-01)

参考文献数

8

被引用文献数

4 6

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In this paper, we investigate effects of harmonic electromagnetic field to torque characteristics of induction motors from both side of experiment and electromagnetic field analysis. The characteristics of two kinds of the aluminum cage three-phase induction motors are measured and calculated. One is with the closed rotor slots. The other is semi-closed. In the experiment, the negative torque at synchronous speed is measured by driving the induction motor by the synchronous permanent magnet motor. The total torque at load condition is also measured by the torque detector. In the analysis, the harmonic magnetic fields, the harmonic losses and the harmonic torques at each time and space harmonic order are calculated using the nonlinear time-stepping finite element method to clarify the mechanism of the harmonic torque generation. The measured and the calculated results agree well. It is clarified that the negative torque caused by the slot harmonics at the rated load condition is not negligible and that the negative torque is mainly generated by the harmonic core losses.

著者

浅野 直則

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.111, no.6, pp.491-495, 1991-06-20 (Released:2008-11-20)

著者

岩尾 徹

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B

巻号頁・発行日

vol.136, no.9, pp.728-728, 2016

被引用文献数

2

---

<p>大電流高エネルギー技術は,電力技術,核融合技術,レーザやビーム発生器などのパルスパワー技術,放電加工やレールガンのような電磁力応用技術,強磁界発生技術など,エネルギー技術の分野から最先端技術の領域に至るまで,幅広い範囲にわたって応用されており,かつ応用分野の拡大</p>

著者

吉田 義昭 鈴木 宏和 藤原 耕二 石原 好之

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.134, no.5, pp.399-411, 2014 (Released:2014-05-01)

参考文献数

29

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It is important that PV systems detect islanding caused by power system fault to ensure electrical safety. So, we propose a novel islanding detection method which detects harmonic impedance by injecting the harmonic currents synchronized with exciting current harmonics of the pole transformer. In case that an induction motor load is included in the load system, the basic experiments of islanding detection and simulation analysis are conducted to verify the effectiveness of the proposed method.

著者

關 四郎

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.66, no.690-692, pp.30-37, 1946 (Released:2008-11-20)

著者

法月 広夢 内村 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.137, no.7, pp.561-567, 2017-07-01 (Released:2017-07-01)

参考文献数

11

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In a teleoperation system with communication delay, the contact information on the slave side is transmitted to the master side with time delay. Hence, an operator may misunderstand that the slave has not contacted an object and may add more force. Eventually, excessive force by the slave may collapse the object. This paper proposes model predictive control with a variable dumping method to prevent collision on contact in a teleoperation system with time delay. The prediction method considers the distance to the object on slave side, and variable dumping is implemented on the master side. The proposed method is evaluated through numerical simulations and experiments.

著者

三根 正亮

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.33, no.300, pp.751-812, 1913 (Released:2008-10-23)

著者

門脇 昌紀

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.132, no.3, pp.NL3_3-NL3_4, 2012-03-01 (Released:2012-03-01)

参考文献数

3

著者

阿部 真 大久保 重範 中津山 幹男

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.117, no.4, pp.452-457, 1997-03-20 (Released:2008-12-19)

参考文献数

12

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We developed a system that composes BGM automatically with color informations of a picture. This system uses only color informations, so it has no object recognitions and can evaluate full-color picture at high speed.In this paper, we propose a concept of characteristic colors for vision-like evaluating. We succeeded in extracting characteristic colors from a full-color picture by using fuzzy theory and proposing a new expression color method, called dome shaped color system. We also were able to compose various progressive patterns with fuzzy theory, in order to coexist general rules and exceptional inflexions of chord progressions for making music.This system is useful for translating visual informations to suitable auditory informations for handicapped persons, also it can be used for educations with high fused audio-visual media, and so on.

著者

大松 繁

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.112, no.7, pp.503-506, 1992-07-20 (Released:2008-04-17)

参考文献数

4

著者

森本 雅之 大石 潔

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.135, no.3, pp.NL3_6-NL3_6, 2015 (Released:2015-03-01)

著者

竹内 英世 保黒 政大 梅崎 太造

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 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)

巻号頁・発行日

vol.130, no.6, pp.1042-1053, 2010-06-01

参考文献数

29

被引用文献数

2

---

KARAOKE is a popular amusement for old and young. Many KARAOKE machines have singing evaluation function. However, it is often said that the scores given by KARAOKE machines do not match human evaluation. In this paper a KARAOKE scoring method strongly correlated with human evaluation is proposed. This paper proposes a way to evaluate songs based on the distance between singing pitch and musical scale, employing a vibrato extraction method based on template matching of spectrum. The results show that correlation coefficients between scores given by the proposed system and human evaluation are -0.76&sim;-0.89.

著者

北村 慎悟 石原 好之 戸高 敏之 井上 嘉明

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.116, no.12, pp.1268-1275, 1996-11-20 (Released:2008-12-19)

参考文献数

10

被引用文献数

2 6

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The inverter circuit of dc brushless motor (DCBLM) needs feedback diodes to protect the switching element from counterelectromotive force.In this paper, we describe the computational method of magnetic field analysis of DCBLM with feedback diodes. The electric circuit equations were formulated based on the theoretical formula of the PN-junction diode. And, solving these equations with the magnetic circuit equation by using the FEM, the electrical characteristic and the magnetic property of DCBLM were calculated. By replacing the switching elements with variable resistor, and transforming electric circuit by using Ho•Thevenin's theorem, the route of current is not necessary to change according to the state of feedback diode and switching elements.This method for feedback diodes is confirmed by the analysis of the permanent magnet DCBLM.

著者

中西 正治

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.132, no.1, pp.NL1_5-NL1_5, 2012-01-01 (Released:2012-01-01)

著者

中鉢 実則 長澤 武

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.131, no.2, pp.151-152, 2011-02-01 (Released:2011-02-01)

被引用文献数

1

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電気学会の投稿規定に反していることが判明したため,本研究開発レターの掲載を取り消す。

著者

松村 文夫

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.111, no.3, pp.219-222, 1991-03-20 (Released:2008-11-20)

参考文献数

3