IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Volume 119 , Issue 11
Showing 1-21 articles out of 21 articles from the selected issue
  • Toshiaki Sasaki
    1999 Volume 119 Issue 11 Pages 1285
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
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  • Kazumasa Ishizu
    1999 Volume 119 Issue 11 Pages 1286-1288
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
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  • Masanori Yamamoto
    1999 Volume 119 Issue 11 Pages 1289-1290
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
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  • Fumio Kitahara, Masayuki Yoshikawa, Akira Kato, Michio Fujiwara, Keisu ...
    1999 Volume 119 Issue 11 Pages 1291-1300
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    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.
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  • Shunsaku Koga, Jun-ichi Kitano, Tsuyoshi Nakashima
    1999 Volume 119 Issue 11 Pages 1301-1306
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper deals with the stopping control of the Maglev train in the Yamanashi Maglev Test Line. There are three important points to evaluate the stopping control. These points are high precision of stopping control, riding comfort and required time for stopping control. Concerning to the high precision of stopping control, the Maglev train requires accurate control of
    stopping within the deviation of 15cm, because the boarding system can not be worked in case the error of stopping position is above 15cm. The boarding system aligns passengers with door in order to guide the passengers during boarding and plays a rote in magnetic shielding. Concerning to riding comfort, we have to prevent the radical variation of retardation in stopping control,
    because we have to keep the riding comfort. Concerning to required time for stopping control, we have to shorten the time for the high speed train system. In this paper, we propose the stopping control method that decreases the retardation with linear relation from the retardation at the starting point of stopping control to Og at the stopping position. Firstly we point out the need and evaluate points of stopping control. Secondly we propose the method of stopping control of Maglev train. Thirdly we report the characteristics of
    stopping control method with simulation and experimental results. Finally we report experimental results controlled with the optimum parameters.
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  • Tamio Okutani, Toshiyuki Shimazoe
    1999 Volume 119 Issue 11 Pages 1307-1314
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper describes the development of a centralized interlocking system (CIS) for railway signalling and its evaluation in terms of safety and availability. The CIS is applied to the Ibara-line (41.7km) connecting Soja, Okayama Prefecture, and Kannabe, Hiroshima Prefecture, which began operations at January 11, 1999. The objectives in developing a CIS were to provide all the facilities available in both interlockings and a CTC (Centralized Traffic Control) system at significantly reduced cost while maintaining high levels of safety and reliability.
    The CIS is regarded as being divided into control center and lineside subsystems (see Fig.1). At the heart of the control center subsystem is the interlocking itself, which is a fail-safe multiple processor system. The lineside subsystem consists of the lineside data cable and trackside functional modules forming a fail-safe local area network.
    The trackside functional modules are connected to the control center subsystem which control them by trackside data links using single mode(SM) optical fiber cables. For the CIS we developed a long distance data transmission system by means of SM optical fiber technology, permitting a direct link over 20km without using a repeater.
    This system enables direct interlocking between starting signals reading into each end of a single line section. Furthermore, a train direction logic featuring a diversity train detection method that was produced in this development improves a safety level and a utilization rate in the single line signalling.
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  • Yoshinobu Nakamichi, Hidenori Shigeeda, Kouji Ajiki, Masao Suzuki
    1999 Volume 119 Issue 11 Pages 1315-1326
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    A superconducting magnetic levitation system (Maglev) employs a linear synchronous motor (LSM) with primary side on ground. In the system, a combined levitation and guidance system arranging propulsion coils on the surface of the sidewall is used. Also, propulsion coils are electro-magnetically coupled to each other because they are attached in double layers. Therefore, propulsion coils on the both sidewalls are electro-magnetically coupled with the combined levitation and guidance system. This means that the surge characteristics of the system will be very complicated.
    As one of the analysis of the electric surge of such an electro-magnetically complicated system of Maglev, we measured the surge between propulsion coils and simulated it using EMTP (Electro-Magnetic Transients Program) in consideration of mutual coupling between coils. After confirming the agreement of the simulated results and the experimental results, characteristics for the practical large system such as Yamanashi Test Line are discussed.
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  • Yoshinobu Nakamichi, Hiroyasu Toda, Shinobu Ikeuchi, Junichi Shinagawa ...
    1999 Volume 119 Issue 11 Pages 1327-1336
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In the superconducting MAGLEV system using a linear synchronous motor (LSM), the power converter for driving LSM is installed above ground. As one useful power converter, a PWM (pulse width modulation) inverter has been developed. The output voltage of the PWM inverter contains much harmonics caused by the PWM controller. Crosslinked polyethylene insulated cable (CV cable) has been adopted as a feeder cable for the MAGLEV power supply system, and accordingly the voltage with much harmonics, which is produced by the PWM inverter, loads on the CV cable.
    The dielectric strength of CV cable under the voltage with much harmonics, which has never been reported so far, has come to be recognized as a very important issue in the development of MAGLEV. The authors have examined the output voltage waveform of PWM inverter and have found that it can be simulated by an AC voltage of commercial frequency upon which high frequency AC voltage is superimposed. Using a special generator capable of generating this particular voltage, the harmonic-superimposed voltage for long-term aging test has applied to CV cables and the dielectric properties of the cables have been investigated.
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  • Hai-Jiao Guo, Hironori Ohashi, Osamu Ichinokura
    1999 Volume 119 Issue 11 Pages 1337-1344
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In recent yeas, various transportation systems have been asked to reduce the energy consumption and so the railway systems are without exception. So far, because the calculation of energy consumption and optimization of the railway systems is so difficult, it is hesitate to consider the effective utilization of the regenerative powers. In this paper, we propose a new simple scheduling method for railway systems that positively utilize the regenerative powers. The main idea is use the areas of the overlap between one train's driving partial and another train's braking partial in a diagram to estimate the regenerative powers. Based on the estimated regenerative powers, we can evaluate some important travel parameters in train traffic scheduling and make up an appropriate train traffic diagram. The simulation results show the proposed method is useful.
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  • Mitsuhiro Numazaki, Akira Miyazaki, Eimei Takahara
    1999 Volume 119 Issue 11 Pages 1345-1352
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    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.
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  • Masafumi Miyatake, Takafumi Koseki, Satoru Sone
    1999 Volume 119 Issue 11 Pages 1353-1360
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Ropeless lifts are needed for vertical transport in the future super skyscrapers whose height is more than 800m because of the limited handling capacity of roped lifts for such buildings. The ropeless lifts have two advantages: multiple car operation in a single shaft and transferability between shafts. The ropeless lifts can be operated like double-track railway systems by making use of these advantages.
    In this paper, we propose designing and operating methods for the ropeless lifts in order to obtain higher handling capacity and save more lift space than conventional roped lifts. The methods contain mainly two ideas: three shaft operation integrated as a unit and application of zonal direct train scheduling. We analyse the lift area of the ropeless lifts and compare it with that of roped lifts. We conclude that the ropeless lifts can save lift area and are enough applicable to present buildings whose number of floors is about 70.
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  • Hiroshi Hoshikawa, Kiyoshi Koyama
    1999 Volume 119 Issue 11 Pages 1361-1370
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Flaw images have recently been utilized in eddy current nondestructive testing in order to improve the evaluation accuracy of the surface flaw depth in the test material. The conventional eddy current testing can provide only blurred flaw images because of the expansion of the eddy current induced in the test material depending on the diameter of the circular test coil. As a result, eddy current testing has mainly been applied only to detect flaws and not to evaluate flaws in nondestructive testing.
    The authors have applied CT inversion technique to the flaw signal by a thin tangential test coil in eddy current nondestructive testing in order to obtain clear flaw images. Since the flaw signals obtained by eddy current testing are totally different from those from X-ray projection, the authors have converted the eddy current testing signals into those analogous to Radon transform and applied CT inversion technique to the resulting signals. The experimental results have indicated that the CT inversion technique provides far clearer flaw images and higher possibility of quantitative flaw evaluation than the conventional method.
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  • Toshiaki Murai, Hitoshi Hasegawa, Takamitsu Yamamoto, Shunsuke Fujiwar ...
    1999 Volume 119 Issue 11 Pages 1371-1376
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    A superconducting Maglev system suspended by EDS has intrinsically a negative magnetic damping. In order to improve the magnetic damping, we have studied a magnetic damper using linear generator by controlling the power factor of those coils. This paper presents the improved type which has larger magnetic damping by changing the arrangement of generator coils and controlling the zero phase current of those coils. By applying to the dqO analysis, we can obtain the relationship between the induced voltage, current of generator coils and magnetic damping. Besides, the characteristics of linear generator and magnetic damping are revealed by numerical examples.
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  • Fumio Yamada, Kenzou Yonezawa, Susumu Sugawara, Nobutaka Nishimura
    1999 Volume 119 Issue 11 Pages 1377-1385
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In the air-conditioning control systems of office buildings, keeping inhabitant thermally comfortable and saving energy have been requested. New control system for room temperature setting using comfort index PMV with neural network and fuzzy theories have been developed. The intelligent air-conditioning control function has been installed as a key function of total building control system as well as other functions. The evaluation of energy-saving and thermal comfort effects have been tested by the process simulator in the first phase. The experimental evaluation has been done later at the real office building. Good results have been obtained for cooling control during summer season. This system will be a powerful control method realizing both energy-saving and comfort to air-conditioning in the office buildings.
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  • Guoguang Zhang, Junji Furusho
    1999 Volume 119 Issue 11 Pages 1386-1392
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    The speed controls of three-inertia system with conventional PI control/PID control are discussed, the analysis procedure based on the parameter plane method is presented. It is shown that the inertia distribution of three-inertia system dominates the dynamic behavior.
    The integrated design of controller and structure is studied, and it is shown that the rational distribution among the three inertias is important to improvement of the dynamic characteristic and reduction of the controller's complexity. In this case, a simple PI control can realize better performance. Furthermore, PID control contributes the rational inertia distribution. The effectiveness is verified by experiment.
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  • Tomohiro Ota, Yoshihiro Kawase, Katsuhiro Hirata, Yoshio Mitsutake
    1999 Volume 119 Issue 11 Pages 1393-1400
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In this paper, the dynamic characteristics of the linear solenoid is analyzed by the 3-D finite element method taking into account the eddy currents. And an auto mesh coupling method for the dynamic characteristics analysis is proposed. The effectiveness of our method is verified through the comparison of the measured results. The influences of the shape and the material of the linear solenoid on the distributions of the eddy currents and the magnetic flux distribution are clarified. Furthermore, the influences of the applied voltage waveform on the response time, the eddy current loss and the copper loss are quantitatively clarified.
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  • Katsumi Satoh, Noritoshi Hirano, Akira Kawakami, Hideo Iwamoto
    1999 Volume 119 Issue 11 Pages 1401-1408
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    At present, switching devices such as GCT (Gate Commutated Turn-off) thyristor and HVIGBT (High Voltage IGBT) are remarkably progressing and able to switch fast at high DC operation voltage above 2.5kV. However, a freewheeling diode which should realize the recovery performance similar to the turn-on performance of switching devices is not developed. In the high voltage diode, a main problem of the recovery performance is to prevent the voltage-oscillation. The voltage-oscillation brings miss-operation of driving circuit or voltage destruction of oneself. As the diode during the recovery operation can be regarded as a combination of one capacitance and two resistances, the oscillation mechanism was studied by replacing the diode to LCR circuit. As this results, it was clear that the diode during the recovery operation made surely the oscillation. On the basis of this analysis, the diode structure to mitigate oscillation was proposed.
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  • Yasuhiko Neba, Ken'ichi Seto
    1999 Volume 119 Issue 11 Pages 1409-1415
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper presents a PWM current source converter and inverter fed induction motor drive system. The system includes photovoltaic (PV) arrays of which the generating power is utilized for the motor drive. The module of the PV arrays is connected to the dc link of the system by using the step-down chopper. The chopper contributes to obtain the maximum power of the PV module in any case of the quantity of the sunlight. The converter is operated by the PWM technique without a phase-shift control and accomplishes the bi-directional power flow for the utility with sinusoidal current. This paper gives the steady-state characteristics and the power relations for the variation of the sunlight quantity and for the changing of the motor load. The transient waveforms of the system operation are shown. The experimental results are compared with the theoretical ones that are calculated by employing the statespace methods. The results prove that the presented system offers good performance in the utilization of the PV generating power.
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  • Takayuki Yokoyama, Vlatko Cingoski, Kazufumi Kaneda, Hideo Yamashita
    1999 Volume 119 Issue 11 Pages 1416-1421
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In this paper, a new adaptive method for finite element analysis using dynamic bubble system taking into account magnitude of magnetic flux density is proposed. The error estimation is performed according to the Zienkiewicz and Zhu error norm estimator and using improved solution of the problem instead of the unknown exact values which is both straightforward and computationally cheap. Mesh density is easily controlled by changing the radii of node bubbles that describe the outline of the analysis region according to the previously performed error estimation. The proposed method produce adaptively generated meshes independent of the initial coarse mesh. The final mesh satisfies the user defined relative error of the solution and takes into account the magnetic flux density distribution. The effectiveness of the proposed adaptive method is investigated for 2-D and 3-D magnetostatic field computations. The obtained results show that the proposed method is suitable and very promising for adaptive electromagnetic field analysis.
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  • Kenji Shiba, Eimei Shu, Kohji Koshiji
    1999 Volume 119 Issue 11 Pages 1422-1423
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper reports on evaluation of radiated emission from transcutaneous energy transmission system for a totally implantable artificial heart. The radiated emission from the coreless type (transformer A) and the externally-coupled type (transformer B) of the transcutaneous transformers are measured, respectively, and compared with German regulation of VDE-0871 for medical electric equipment. From the measurement, the radiated electric field intensities at 100kHz from the transformers A and B are 67.7dBμV/m and 38.7dBμV/m, respectively. As a result, it is found that the radiated emission from the transformer B is sufficiently small compared with the level regulated in VDE-0871.
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  • Masaki Tsuneoka, Nobuyoshi Nakayama, Toshio Asaka, Toshimitsu Iiyama
    1999 Volume 119 Issue 11 Pages 1424-1425
    Published: November 01, 1999
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    High frequency step-up transformers for non-resonant DC-DC converter have been developed. The rated parameters of the transformers are 5kVA of capacity, from 650V, 7.7A of primary to 16.7kV, 0.3A of secondary with squared wave at 5kHz of frequency and the withstand voltage of the transformer is 100kV. Avoiding parasitic oscillation, distributed windings are applied to get low capacitance of the windings and reduce the capacity into about one hundredth. This paper also reports the test result of frequency characteristics of the step-up ratio and phase.
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