著者

関 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.76, no.812, pp.532-546, 1956-05-01 (Released:2008-11-20)

参考文献数

11

著者

葛西 昭成

出版者

一般社団法人 電気学会

雑誌

電気学会誌 = The journal of the Institute of Electrical Engineers of Japan (ISSN:13405551)

巻号頁・発行日

vol.115, no.1, pp.41-44, 1994-12-20

参考文献数

2

著者

都甲 潔

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.9, pp.776-779, 1991-09-20 (Released:2008-11-20)

参考文献数

6

著者

岩尾 徹 森下 穂香 河野 聖

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.142, no.2, pp.63-66, 2022-02-01 (Released:2022-02-01)

参考文献数

1

---

1.はじめに2011年3月に発生した東日本大震災において,計画停電の実施といった電力供給力が大幅に不足する事態が発生し,大規模災害発生時の電力供給力の向上に対する必要性が高まった。

著者

児玉 浩憲

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.139, no.10, pp.659, 2019

---

<p>将棋界までが「元号」という時代区分に揺さぶられるとは,全く驚いた。平成最後の年の瀬2018年12月21日,前人未到の「七冠同時制覇」を誇った羽生善治九段が下関のホテルで催された竜王戦の第7戦に敗れ,</p>

著者

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.2, pp.135-145, 2022-02-01 (Released:2022-02-01)

参考文献数

28

---

Three-phase voltage-fed inverters are used for numerous applications, such as HEVs, EVs. These inverter systems require further improvements in terms of conversion efficiency, cost, size and reliability. On the other hand, dual inverter systems for open-winding motors are garnering attention. This paper, proposes application of pulse-voltage-injection two-phase pulse width modulation (PWM) scheme to dual inverter systems that drive open-winding motors. From the simulated results, it is confirmed that the voltages and currents in the open-winding motor are of higher quality than those in the conventional three-phase PWM scheme or the reference-shift two-phase PWM scheme.

著者

七澤 風画 芳賀 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.142, no.2, pp.125-134, 2022-02-01 (Released:2022-02-01)

参考文献数

12

---

This study proposes a control method for a dual inverter to extend the output speed range of an interior permanent magnet synchronous motor with open-ended windings. The secondary inverter with a floating capacitor for the dual inverter supplies reactive power to the motor. In the proposed method, the reactive power required to drive the motor is calculated using an inductive voltage-limiting ellipse, and the d-axis current reference value and output voltage of the secondary inverter are determined. In the proposed control method, the primary inverter of the dual inverter supplies the effective power to the motor to expand the output speed range. The experimental results indicate that the output speed range is significantly improved and the constant torque region is expanded by approximately 41% compared with that in the conventional method.

著者

髙田 裕司 上野 遼平 Ramin Banan Sadeghian 永沼 香織 辻 清孝 藤本 和也 横川 隆司

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.142, no.2, pp.21-28, 2022-02-01 (Released:2022-02-01)

参考文献数

14

被引用文献数

1

---

We developed a bi-channel microfluidic device integrated with a four-probe electrode system to measure the trans-epithelial electrical resistance (TEER). Time course of TEER was monitored when the extracellular Ca2+ was removed and replenished both from the upper and lower channels. We showed that tight junctions were disrupted rapidly once Ca2+ was removed from the basal side. However, when Ca2+ was removed from the apical side such disruption progressed slowly. Upon replenishing Ca2+ content at the basal side the TEER recovery pace was also faster than the case of replenishing it at the apical side. We conclude that cell polarity needs to be taken into account during the process of Ca2+ removal/replacement in explaining the dynamics of tight junction disruption/recovery. These results indicate that our approach can be utilized in detecting cell polarity in real time and low invasion.

著者

栗山 敏秀 村上 恒夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. E, センサ・マイクロマシン部門誌 (ISSN:13418939)

巻号頁・発行日

vol.138, no.10, pp.455-460, 2018

---

<p>The human error prevention system is realized by 3-point collation using a barcode reader. A new optical device consisting of Littrow prism and cylindrical lens, which are optically aligned with a built-in camera and an LED in a smartphone, has realized the smartphone with the same usability as the conventional barcode reader.</p>

著者

近藤 圭一郎 結城 和明

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.125, no.1, pp.1-8, 2005 (Released:2005-04-01)

参考文献数

10

被引用文献数

3 6

---

The Pulse Generators or PGs are equipped to detect the rotor frequency of induction traction motors for the torque control in railway vehicle traction field. Eliminating PGs are preferable from the view points of increasing the reliability of the traction system, reduction of the both initial and maintenance cost and down-sizing induction traction motors. Expecting those merits, we have been studying to apply a sensor less control method to induction traction motor control. Prior to some reports of studies and tests to apply speed sensor-less strategy to railway vehicle traction, we lunched the ideas to apply the speed sensor-less control strategy and results of the studies and the tests. In this paper, we present the novel control method for railway vehicle traction and some results of theoretical study and tests.

著者

戸田 伸一 結城 和明 逸見 琢磨 安岡 育雄

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.123, no.11, pp.1314-1320, 2003 (Released:2004-06-18)

参考文献数

3

被引用文献数

2 2

---

We have developed a Re-adhesion control algorithm of traction inverter without any Motor speed sensors. In this paper, we are focusing on anti-slip control performance of this system. The influence of speed estimation delay is considered and a method to improve the delay is shown. Acceleration performance of the proposed system is same level as the one of current drive systems using speed sensors.

著者

熊井 巧 青山 真大

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.1, pp.67-75, 2022-01-01 (Released:2022-01-01)

参考文献数

22

被引用文献数

3

---

This paper presents a new technique for carrier harmonics utilization for field excitations and its experimental demonstration. The system is composed of a permanent magnet rotor structure with a wound-field and concentrated winding stator. An induction coil with a series connected capacitor and a field coil with a rectifier are installed on the rotor. The resonance frequency of the LCR series circuit is set to the carrier frequency. Experiments are conducted and the test results are demonstrated along with the driving characteristics.

著者

足立 良夫

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.80, no.864, pp.1236-1243, 1960 (Released:2008-11-20)

参考文献数

11

著者

土屋 柚樹 赤津 観

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.1, pp.1-8, 2022-01-01 (Released:2022-01-01)

参考文献数

10

---

The switched reluctance motor (SRM) has generated considerable attention because of its lack of magnets and lower cost structure compared to the permanent magnet synchronous motor (PMSM) structure. In addition, SRM can achieve high speed rotation because of its simple structure and high robustness. However, SRM has lower torque density than that of PMSM. To increase the torque density in SRM, a grain-oriented electrical steel sheet (GO) can be applied as the stator and rotor materials. The magnetic characteristics of GO fluctuate depending on the angle between the rolling direction and magnetic flux direction. In a previous research, it was confirmed that three kinds of torques are output when the stator and rotor materials use GO. In this paper, three kinds of torques are explained, and a design concept of an SRM using GO is proposed. In addition, the static and dynamic torque characteristics of the proposed SRM are verified by simulation and experiment.

著者

木下 聡

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.122, no.7, pp.446-449, 2002-07-01 (Released:2008-04-17)

参考文献数

6

著者

福間 勝彦 中村 利孝 塚越 昌彦 竹内 活徳 松下 真琴

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.1, pp.26-32, 2022-01-01 (Released:2022-01-01)

参考文献数

24

---

Application of large synchronous motors started in the early 90; currently the synchronous motors (SMs) are being phased out and replaced with getting old, and they are being replaced with larger capacity motors which are installed on the existing motor-mount basement. These larger capacity motors require higher magnetic flux than the conventional motors, which leads to the problem of magnetic saturation in the SMs. It is time consuming to find suitable parameters related to flux for each motor using the conventional SM control method. In this paper, a method to improve the adjustment of flux parameters using a simplified matrix table is introduced.

著者

堀内 健文

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.94, no.5, pp.375-382, 1974-05-20 (Released:2008-11-20)

参考文献数

26

被引用文献数

1

著者

松沢 清治

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.82, no.880, pp.90-96, 1962-01-01 (Released:2008-11-20)

参考文献数

8

著者

乗松 立木

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.74, no.784, pp.52-59, 1954-01-01 (Released:2008-11-20)

参考文献数

14

著者

谷嵜 徹也 上田 浩次 村部 敏彦 野村 英之 鎌倉 友男

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 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.133, no.5, pp.558-565, 2013-05-01

参考文献数

12

被引用文献数

1 1

---

Traffic regulations mandate the use of winter tires in the interests of smooth traffic flow during heavy snow days. In this situation, road administrators must visually inspect vehicles to ensure summer tires are not being used on expressways. However misjudgment is unavoidable only by visual inspection and heavy traffic jams eventually occur. To avoid such traffic jams, an automatic tire discrimination system is required. In this report, we propose a simple method of discrimination between summer and winter tires using tire/road noises emitted by running vehicles, and evaluate the relationship between road surface roughness and the impact noise patterns of winter tires. Additionally, we consider the influence of road surface conditions such as dry and wet surfaces on the proposed discrimination method. Finally, we confirm the effectiveness of the discrimination system in the field using a number of vehicles with different tires.