著者

小笠原 悟司 沢田 直 阿部 慶一 赤木 泰文

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.111, no.11, pp.930-936, 1991-11-20 (Released:2008-12-19)

参考文献数

12

被引用文献数

2 3

---

This paper describes a vector control system of an induction machine using a neutral-pointclamped voltage source inverter (NPC-VSI) that is one of double series connected inverters.The NPC-VSI is able to output 5 levels step-shaped line to line voltage without output transformers or reactors, and it may reduce harmonic currents corresponding to torque ripples. However, the NPC-VSI has a problem that excessive high voltage is applied to swiching devices when a neutral point of two DC capacitors of the NPC-VSI varies from the center of the DC link voltage, because the neutral point is floating.This paper proposes a current controller to which the space vector theory is applied. This can reduce harmonic currents to 1/4 of those of a conventional voltage source inverter using 6 swiching devices, and regulate the neutral point potential within a preset range. To simplify the current controller, information about voltage space vectors is given from the vector controller to the current controller. Validity of the current controller is confirmed by a prototype using an induction machine of 2.2 kW.

著者

新中 新二

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.128, no.9, pp.1147-1148, 2008-09-01 (Released:2008-09-01)

参考文献数

7

被引用文献数

1 1

---

This paper gives a new analysis about the minimum current under the flux saturation for efficient drive of synchronous reluctance motors. This paper shows that the asymmetric flux saturation of the mirror-phase inductance causes the nonlinear minimum current trajectory, and derives newly the general analytical trajectory and a concrete approximated analytical trajectory.

著者

加藤 利次 井上 馨 秋山 佑介 大橋 功基

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.9, pp.615-621, 2016-09-01 (Released:2016-09-01)

参考文献数

11

被引用文献数

4 2

---

A grid-connected inverter is indispensable for photovoltaic power generation and smart grid systems, and it must be designed for stable operation. The impedance method based on the Nyquist criterion is often utilized to analyze the stability of grid-connected inverter systems. The impedance method is based on the eigen values of the product of the inverter output admittance and the line impedance matrices in the frequency domain. However, the frequency characteristics have so far been derived only for inverters with analog control systems. A new frequency analysis method for inverters with digital control systems is proposed in this paper. First, a stability analysis example for a three-phase LCL-type inverter controlled digitally is shown and the results are compared and validated with those by simulation using a Saber simulator. Finally, they are also compared and validated with experimental results digitally controlled by a DSP-based system.

著者

舟木 剛 福永 崇平 井渕 貴章 福田 典子 中村 孝 柳澤 佑太

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.9, pp.636-643, 2023-09-01 (Released:2023-09-01)

参考文献数

21

被引用文献数

1

---

This study develops a transformer-less power supply for AC railway vehicles. The rail on the permanent route of an AC electric railway is grounded. The proposed power supply circuit takes advantage of this feature and performs AC-DC power conversion without using a bridge circuit. The circuit topology is a combination of indirect type DC-DC converters. The operation and control of power conversion from AC to DC power run and from DC to AC regeneration is confirmed using numerical simulations. In addition, the operation of the proposed circuit is validated experimentally.

著者

吉川 祐一 村上 浩 森本 茂雄

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.136, no.2, pp.126-133, 2016-02-01 (Released:2016-02-01)

参考文献数

12

被引用文献数

2 1

---

This paper proposes a new structural dual rotor SPMSM (Surface Permanent Magnet Synchronous Motor) using ferrite magnets having high torque density, small size, and low noise. In addition, the advantages of having a toroidally winding and adual rotor are examined through analysis, and it is confirmed that the torque density of the proposed motor is competitive to the rare-earth IPMSM (Interior Permanent Magnet Synchronous Motor).

著者

嶋田 陽 能美 雄貴 近藤 圭一郎

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.134, no.1, pp.10-18, 2014-01-01 (Released:2014-01-01)

参考文献数

13

被引用文献数

3 7

---

An unbalanced input voltage three-level inverter can be applied to boost the input voltage by employing energy storage devices, such as the electric double layer capacitor (EDLC), in order to enhance the motor output performance. However, the unbalanced input DC voltage limits the output power and generates particular voltage harmonics. In this paper, the harmonic characteristics, a method to change the power distribution and the limit of the power distribution when the ratio of the DC source voltage to the EDLC voltage is changed are discussed.

著者

福田 典子 渡邉 朝紀

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.121, no.2, pp.196-203, 2001-02-01 (Released:2008-12-19)

参考文献数

10

---

Shinkansen trains are now being operated under the Automatic Train Control (ATC) system and are automatically decelerated and stopped at stations when necessary by the ATC system. The ATC system is based on the on-board signal transmitted from wayside equipment via track circuits. The ATC brake is activated when a train received a signal speed lower than the train speed and is released when the train speed becomes lower than the signal speed. Because the length of block section is determined by the ATC brake force in the worst case, the train normally decelerates so fast that it coasts a certain period up to the end of the block section as shown in Fig. 1.We studied the control method of on-board ATC system for Shinkansen train to shorten the operation time and reduce the adverse effects of changes in deceleration on ride comfort, while maintaining the safety and reliability of present ATC signal system. We propose an on-board pattern brake control system based on the present ATC data without changing wayside equipment. When compared with the simulated operation time under the present ATC brake control system, the operation time by this proposed method is 47.6 seconds less, after brake is applied until the train stops at the Hakata Terminal station, with series 500 Shinkansen train. This paper discusses the system and effects of the on-board pattern.

著者

引原 隆士 上田 〓亮 上之園 親佐

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.108, no.3, pp.253-260, 1988-03-20 (Released:2008-12-19)

参考文献数

8

著者

釜我 昌武 成 慶〓 大橋 弘通

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.128, no.5, pp.569-576, 2008-05-01 (Released:2008-05-01)

参考文献数

31

被引用文献数

1 6

---

In this paper, a power converter in combination of 1200V Si-IGBT and SiC-SBD is investigated for decrease of devise loss in compare with Si-PiN diode. To use device simulation which is based on considering of switching experimental results and static characteristics is employed to estimate device loss. In device simulation, also, we adjust an anode injection efficiency of Si-IGBT to increase switching speed and optimize trade-off relation between on-state voltage and switching loss of Si-IGBT due to minimize total device loss. As the device simulation result, the switching frequency of in combination optimized Si-IGBT and SiC-SBD has approximately three times as high as Si-IGBT with Si-PiN diode. Moreover, in this paper, the limitation of switching frequency by comprehensive total device loss with present heat cooling ability is discussed.

著者

胡 帥文 永井 俊一 富田 剛 馬場 英治 横塚 勉

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.114, no.11, pp.1162-1168, 1994-10-20 (Released:2008-12-19)

参考文献数

7

---

One of the most important design problem of the permanent magnet (PM) motor is the reverse rotation. The conditions for the reverse rotation with a square-wave drive are investigated experimentally. Relations between the applied voltage and the pulse rate fp at which the probability Pb of the reverse rotation takes a maximum are discussed. Effects of the initial rotor position δ and the delay-time td of the first pulse on the value of Pb are discussed. Calculations of reverse rotating performance are made with various conditions, and clarified the mechanism of the reverse rotation.

著者

飯島 伸一 石塚 亮介 吉田 征夫 曽禰 元隆

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.122, no.6, pp.640-645, 2002-06-01 (Released:2008-12-19)

参考文献数

3

---

The high reliable timer is required in a synchronous measurement and in a distributed processing that uses the network computers. The precision of it is expressed with the stability of the frequency. The easiness of embedding, the low cost and down sizing are requested to the timer that is required in these various fields in addition to its precision. In this paper we propose a technique that realizes a high precision timer, which enables the synchronization in a many point with the low cost and with the small size. The proposed technique adopts a general PI control of VCO (Voltage Controlled Oscillator) based on GPS (Global Posi-tioning System). Also the controller of the timer that was developed is realized by software by using a DSP (Digital Signal Processor). The frequency stability that was obtained by the timer that was developed was 2.3×10-13

著者

宮地 正和

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.107, no.3, pp.344-350, 1987-03-20 (Released:2008-12-19)

参考文献数

5

著者

坂本 泰明 柏木 隆行 田中 実 長谷川 均 笹川 卓 藤井 信男

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) (ISSN:09136339)

巻号頁・発行日

vol.129, no.3, pp.342-349, 2009-03-01 (Released:2009-03-01)

参考文献数

17

被引用文献数

5 6

---

One type of braking system for railway vehicles is the eddy current brake. Because this type of brake has the problem of rail heating, it has not been used for practical applications in Japan. Therefore, we proposed the use of a linear induction motor (LIM) for dynamic braking in eddy current brake systems. The LIM reduces rail heating and uses an inverter for self excitation.In this paper, we estimated the performance of an LIM from experimental results of a fundamental test machine and confirmed that the LIM generates an approximately constant braking force under constant current excitation. At relatively low frequencies, this braking force remains unaffected by frequency changes. The reduction ratio of rail heating is also approximately proportional to the frequency. We also confirmed that dynamic braking resulting in no electrical output can be used for drive control of the LIM. These characteristics are convenient for the realization of the LIM rail brake system.

著者

中野 孝良 岩金 孝信 赤木 泰文

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.114, no.1, pp.1-7, 1994-01-20 (Released:2008-12-19)

参考文献数

26

被引用文献数

1 1

著者

持永 芳文 小山 義夫 竹内 竹次

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.110, no.5, pp.570-579, 1990-05-20 (Released:2008-12-19)

参考文献数

10

被引用文献数

1 1

---

Auto-transformer feeding system is standard equipment for power supply to high-speed trains and prevention of inductive interference with the telecommunication lines on the AC electrified Shinkansen lines in Japan.In the present AT feeding system in which the feeder side of the feeding transformer is not grounded, the insulation level on the feeder side at the substation is set twice as high as the vehicle voltage.For the purpose of economizing on the substation power system, the authors have developed new methods adopting a three-winding Scott-connected transformer to make the insulation level on the feeder side a half of the present value and additionally employing a series capacitor with a simplified structure to compensate for the voltage drop.This paper describes the structure and characteristics of the three-winding transformer, and insulation level reduction method using it.Specifically various features of the system are discussed through simulation of feeding performance by multi-circuit networks analysis and study of various phenomena under use of the series capacitor.Furthermore by confirmation tests executed in the Osaka area of the Tokaido Shinkansen line, the practical applicability of the system is proved.

著者

松井 信行 武田 洋次

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.118, no.6, pp.685-690, 1998-06-01 (Released:2008-12-19)

参考文献数

38

被引用文献数

22 32

著者

沼野 稔夫 仲津 英治 木俣 政孝

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.114, no.6, pp.608-611, 1994-06-20 (Released:2008-12-19)

被引用文献数

1 1

著者

堤 雄飛 小田 篤史 前川 景示

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.11, pp.800-807, 2022-11-01 (Released:2022-11-01)

参考文献数

34

---

At present, there is a growing demand for energy saving to prevent global warming. Thus, the railway industry is also focusing on energy saving methods. Power consumption of running trains has a large variation of approximately 20% caused by drivers' operation. Therefore, improving the running profile can considerably reduce energy consumption. Numerous algorithms for generating energy saving running profiles have been researched and developed. To adapt energy saving operation to various environments, we developed a technology that maintains punctuality without reducing the energy efficiency when temporary differences occur in driving conditions. We propose a method that determines the re-creation command point to complete the re-creation at the switching point of the driving operation in the existing energy-saving target pattern, to achieve both punctuality and ride comfort. As a result of verifying the effect of the proposed method on the conventional method via a simulation, it was confirmed that the proposed method can prevent the increase in the number of operation changes when the driving conditions change, whereas the conventional method increases the number of operation changes.

著者

小山田 将亜 國松 禎明 水本 郁朗

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.11, pp.859-865, 2022-11-01 (Released:2022-11-01)

参考文献数

10

被引用文献数

1

---

When designing electric motors, many types of performances (electrical and mechanical characteristics) must be predicted with good accuracy. In general, these performances are determined based on complex theoretical calculations, but theoretical calculations include various assumptions. Therefore, it is difficult to eliminate prediction errors when predicting performance, and it is necessary to improve accuracy by referring actual test data. Recently, with the digitalization of the manufacturing process, a large amount of actual data has been converted into a database, and it is expected to be put to effective use. Here, a neural network that predicts various performances of electric motors using a large amount of actual data as a training dataset, is constructed to achieve uniform and high-precision performance prediction via deep learning. Its practical use for actual design work is verified in this study.

著者

綿引 正倫 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.11, pp.835-844, 2022-11-01 (Released:2022-11-01)

参考文献数

14

---

It is known that the harmonic current of a motor affects torque ripple. Therefore, to take into account the harmonic current in finite element analysis, the voltage input needs to be evaluated however, voltage input analysis is more time-consuming than current input analysis. In this paper, we propose a method to predict the harmonic current and torque ripple of the voltage input analysis of the sine wave by only using the result of the current input analysis of the sine wave in the surface permanent magnet synchronous motor.