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

北川 亘 服部 陽助 藤原 耕二 石原 好之 戸高 敏之

出版者

The Institute of Electrical Engineers of Japan

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.129, no.11, pp.1016-1021, 2009-11-01

参考文献数

5

被引用文献数

2

---

This paper describes the preliminary investigation of the database of magnetic properties of magnetic materials to realize the highly accurate magnetic field analysis. By showing the various measured properties, the contents of database, which are possible to be prepared by means of current measurement techniques, were shown.

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

大島 正明 中村 文則 玉井 伸三 山本 融真 森 治義

出版者

The Institute of Electrical Engineers of Japan

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.120, no.1, pp.104-111, 2000-01

参考文献数

12

被引用文献数

3 1

---

This paper proposes a novel single-phase UPS inverter modulated by Error-Tracking Mode PWM scheme. An ac voltage regulation scheme which matches the PWM scheme is newly developed in a theoretical way. Since Error-tracking Mode PWM is based on constantly-sampled data, the controller is suited to be digitally implemented. The equivalent circuit of the UPS inverter controlled by the schemes is derived. The output impedence is found to be composed mainly of resistance differently from general ac apparatus.<br>According to the newly-developed schemes, a 3kVA, 100V, 50Hz UPS inverter is experimentally fabricated in which the sample period is 10μs and the average switching frequency is 6kHz. No load, linear load and non-linear load characteristics are measured. The output voltage remains almost sinusoidal even for the rated non-linear load. The output impedences are also measured and well agreed with the intended values.

著者

沼崎 光浩 宮崎 玲 高原 英明

出版者

The Institute of Electrical Engineers of Japan

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.119, no.11, pp.1345-1352, 1999-11

参考文献数

12

被引用文献数

1 2

---

This paper describes improvement for wheel slip and re-adhesion control for electric locomotives with induction motor vector control. Compared with the conventional slip frequency method, the torque response is much improved by the vector control. By referring the re-adhesion process for the traditional rectifier controlled do-motor locomotives, suitable torque reduction to an induction motor is applied in accordance with the wheel slip speed. The test results by the series EH500 locomotive for Japan Freight Railway Company, show much improvement for the re-adhesion process especially when a steeper torque reduction ratio is applied.

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

---

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

Yoshifumi Mochinaga Yoshio Akatsuka Kohichi Arai Masaru Ono

出版者

The Institute of Electrical Engineers of Japan

雑誌

IEEJ Transactions on Industry Applications (ISSN:09136339)

巻号頁・発行日

vol.111, no.3, pp.237-244, 1991-03-20 (Released:2008-12-19)

参考文献数

6

被引用文献数

1 3

---

Auto-transformer feeding system is standard equipment for power supply to high-speed trains on the AC electrified Shinkansen lines in Japan.Feeder side voltage of feeding transformer is 60kV on Shinkansen lines, and power supply to vehicle by an auto-transformer is stepped down from 60kV to 30kV. In the present autotransformer feeding system in which the feeder side of the feeding transformer is not grounded, the insulation level on the feeder side of the substation is set at class 60.For the purpose of economy on the substation power system, it is effective to adopt a three-winding transformer which makes the insulation level on the feeder side equal to 1/2 of the present value. Therefore, authors propose a new three-winding transformer connection that permits neutral direct grounding for the substation receiving extra-high voltage.This paper describes a theoretical study and results of a test on a mini-model of the proposed new type transformer connection. According to the result of examination, impedance characteristics of the transformer satisfy the terms of insulation level reduction. There are good prospects that the new type transformer can be introduced in practical use.

著者

伊東 淳一 藤井 崇史 星野 哲馬 小高 章弘 佐藤 以久也 田中 大輔

出版者

The Institute of Electrical Engineers of Japan

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.128, no.8, pp.1005-1012, 2008-08-01

参考文献数

12

被引用文献数

4 9

---

This paper proposes analysis a dead-time error voltage compensation method with a disturbance observer for vector control, and analyses the proposed method. The dead-time compensation is very important to improve performances in the low speed region. The proposed compensation method is composed in the d-q rotational frame with the disturbance observer. As a result, a disturbance transmission characteristic becomes same as a high-pass filter. Then a stability of the proposed controller is hardly affected by controller parameters. In this paper, the validity of analysis is confirmed by experimental results under some conditions. The experimental results are similar to analyzed characteristics and indicate a validity of the analysis results.

著者

並木 政人 中村 壮亮 橋本 秀紀

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.136, no.7, pp.485-493, 2016

---

Recently, wireless charging via magnetic resonance coupling has gained attention because it has the potential of efficient midrange wireless charging. Here, functions such as sensing at the transmitter and wireless communication from the target are the essential elements to realize a standard wireless charging system. Currently, the sensing and communication protocol of the hardware (i.e., the high-frequency power source and antenna configuration) compatible with wireless charging is gaining attention in terms of its cost and space reduction due to the use of common components for multiple functions. However, this protocol has the problem of narrow effective areas due to the fact that the sensing range depends on the fixed Q factor of the antenna. To overcome this problem, the concept of wide-area sensing based on a Q controllable antenna is proposed, and the effectiveness is verified through a theoretical analysis and an experiment. As a result, it is clarified that the effective area can be expanded up to a ratio of the distance g between the transmitting and receiving antennas to the inner diameter d of the antenna g/d =5.0.

著者

森貞 晃 小林 孝之 蓬原 弘一

出版者

The Institute of Electrical Engineers of Japan

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.9, pp.839-846, 2005

被引用文献数

1

---

In this paper, construction logic of a man/machine safety work system is presented. Especially in a system where the human and machine cooperatively work on the time axis, safety assurance requires the human and machine to maintain different positions or states. A control of this positional relationship or state change is defined as block section control. In Chapter 3, the safety of the platform door system composed of train doors and platform doors is discussed. These systems are characteristic in that it has two or more safe areas and that its hazardous area change to safety area. The concept of the man/machine safety work system is applied to the station platform door system, and the conditions for assuring the safety of the control the station platform door system are derived.

著者

後藤 幸夫 駒谷 喜代俊 福田 豊生

出版者

The Institute of Electrical Engineers of Japan

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.116, no.5, pp.569-577, 1996-04-20

参考文献数

16

被引用文献数

25 6

---

Increasing vehicular traffic are causing traffic jam and social economic loss in recent years. Dynamic traffic management systems based on actual traffic conditions are expected to reduce these problems. Computer simulation is a powerful tool to evaluate the system performance of new traffic management system, since it is difficult to evaluate it under various traffic conditions in the real world due to huge costs and safety concerns.<br>In this paper, we propose a new microscopic traffic simulation model by object-oriented programming style. In this model, the street network is composed of nodes and links and vehicles run autonomously in the street network. The autonomous vehicle movement model is composed of decision model that depends on the driver's character and vehicle motion model that depends on the attribution of the vehicle. Then, we analyze the quality of our proposed model and show the effectiveness for evaluating the performance of the traffic management systems.

著者

北原 文夫 吉川 政之 加藤 彰 藤原 道雄 戸次 圭介

出版者

The Institute of Electrical Engineers of Japan

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.119, no.11, pp.1291-1300, 1999-11-01 (Released:2008-12-19)

参考文献数

12

---

East Japan Railway Company (JR, EAST) has developed the new type of electronic interlocking device which was applied the general-purpose information technology, and portable radio terminal which was added fail safe function. These new developments contribute to success of the modernization of the railway company and securing the safety fully. This paper informs these fail-safe methods of first practical using in Japan.The new type of electronic interlocking device and portable radio terminal have already installed for many stations, and these effects are not able to be said in a word fully. The new railway signaling technology which is based on the general-purpose information has come to new stage to apply the new railway signaling system. Accordingly this paper informs the significance of applying for the such field and possibility in the future.

著者

小林 大太 居村 岳広 堀 洋一

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.136, no.6, pp.425-432, 2016

被引用文献数

14

---

Transmitting efficiency is one of the most important characteristics in dynamic wireless power transfer for electric vehicles. In this paper, a simple and efficient topology for a transmitting system called the DC bus system is introduced. Its simplicity maximizes the potential transmitting efficiency. Moreover, a receiving circuit topology and a maximum efficiency control, which is a method to maximize the transmitting efficiency by controlling the secondary voltage, are proposed. A real-time coupling coefficient estimation method is necessary to calculate the secondary voltage command for the control. A simulation and experimental evaluation of the maximum efficiency control was performed using an experimental setup. The results indicate that it provides a large improvement in efficiency and its implementation in a real dynamic power transfer system for electric vehicles is feasible.

著者

武井 貴義 下野 誠通 大西 公平

出版者

The Institute of Electrical Engineers of Japan

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.129, no.6, pp.601-607, 2009-06-01

被引用文献数

5 4

---

Recently, minimally invasive surgery (MIS) has become apparent. Research has been performed on surgical robots needed in MIS. In the case of MIS, it is effective to express environmental impedance as numerical data in order to preserve it for establishing standard reference values of the conditions of internal organs. In this paper, we propose a novel method for the estimation of stiffness in real environments in which bilaterally controlled robots are needed. By using the proposed method, environmental stiffness can be estimated dynamically regardless of the initial position of slave system. The viability of the proposed method is confirmed from the experimental results.

著者

外山 浩司 竹下 隆晴 松井 信行

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.3, pp.354-360, 1996-02-20 (Released:2008-12-19)

参考文献数

9

被引用文献数

2 4

---

The authors already proposed the new control scheme of the PWM converters where the control scheme was performed on the estimated voltage and phase of the source, thus eliminating the voltage sensor.The paper deals with a stability problem of a sensorless PWM converter control. Under consideration of the parameter error, the stability analysis of the proposed control is examined. In addition to that, a design procedure of the estimation gains is also examined. For the stable starting of the system, the initial estimation of the amplitude and phase angle of the source voltage is proposed.The effectiveness of the theoretical stability and estimation gain design has been confirmed by experiments.

著者

森本 茂雄 上野 智広 武田 洋次

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.114, no.6, pp.668-673, 1994-06-20 (Released:2008-12-19)

参考文献数

8

被引用文献数

9 27

---

Permanent magnet synchronous (PM) motors are widely used for industrial applications. In the PM motor drives, it is difficult to achieve the wide speed and constant power operations, which are desired in traction and spindle drives, because the field-flux of PM motor is uncontrollable and as a result the field-weakening control is not available. The air-gap flux, however, can be weakened by the demagnetizing effects due to the d-axis armature reaction (flux-weakening control). In this paper, the wide speed control method of the interior PM (IPM) motor, which includes the maximum torque-per-ampere control and the flux-weakening control, is proposed. In the high-speed flux-weakening region, there are some cases where the control performances become worse and the control system becomes unstable because of the saturation of current regulator and the effects of magnetic saturation. The high performance current regulator compensating these effects is also proposed. The control performances of the proposed control system are confirmed by the several drive tests with respect to the prototype IPM motor.

著者

近藤 陽介 泉地 正人 山本 貴生 平野 尚彦

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.133, no.5, pp.510-517, 2013-05-01 (Released:2013-05-01)

参考文献数

13

---

This paper provides a new method to estimate very high frequency (VHF) conducted noise from power electronic devices using numerical analysis. The switching waveforms generated by power semiconductor devices, which are the main noise sources, are calculated by a circuit simulation that uses semiconductor device models. The transfer functions from noise sources to voltage measurement points are calculated by the S-parameters on a power electronic device. The S-parameters are calculated by a 3D electromagnetic simulator. The combined results of circuit simulation and electromagnetic analysis create a good correlation with the actual experimental result in the frequency range of 200MHz and below.

著者

酒井 茂

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.111, no.8, pp.626-632, 1991-08-20 (Released:2008-12-19)

参考文献数

4

著者

開道 力 竹田 和年 脇坂 岳顕 溝上 雅人

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.119, no.7, pp.1010-1015, 1999-07-01 (Released:2008-12-19)

参考文献数

3

被引用文献数

1 4

---

Magnetic and mechanical characteristics of adhesive coating non-oriented electrical steel sheet cores were measured in the conditions of motor, comparing with those of welded cores. The deteriorations of iron losses and exciting currents by adhesion are less than those by welding. The noise levels and vibrating levels of adhesive coating cores are about 10dB lower than welded cores. The results of modal analysis of adhesive coating core and welded one support the results of noise and vibration tests. The heat conductivities of adhesive coating cores in lamination direction are higher.