IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Volume 112 , Issue 2
Showing 1-15 articles out of 15 articles from the selected issue
  • Hirofumi Akagi
    1992 Volume 112 Issue 2 Pages 93-96
    Published: February 20, 1992
    Released: December 19, 2008
    JOURNALS FREE ACCESS
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  • Atsuo Kuwmara
    1992 Volume 112 Issue 2 Pages 97-99
    Published: February 20, 1992
    Released: December 19, 2008
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  • Susumu Tadakuma, Tokao Kawabata, Ichirou Miyashita
    1992 Volume 112 Issue 2 Pages 100-106
    Published: February 20, 1992
    Released: December 19, 2008
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  • Tetsuo Yamada, Yasuhiro Yamamoto, Tadashi Ichioka, Tohru Niwa
    1992 Volume 112 Issue 2 Pages 107-116
    Published: February 20, 1992
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In the vector control system using the slip frepuency control method, the rotor resistance of an induction motor is used for calculating a slip frequency. So that the change in temperature of the rotor resistance causes the deterioration of the torque control characteristic. This paper presents a new method of the compensation for the rotor resistance change which is robust for the stator resistance change. A Current control loop is composed of the γ-δ axes in which the γ axis is coincident to the stator current. In this method, the stator voltage error on the δ axis which is directly obtainable from this current control loop was used. The change in the stator voltage was able to be detected accurately, therefore the torque control accuracy was improved particularly in the low speed region. The experimental results of the current response and the compensation for the rotor resistance deviation were shown, too.
    Moreover though the mutual inductance has been treated as an invariable value, the value does change by a frequency and an excitine command. In this control method, an initial tuning of the equivalent mutual inductance was achieved by detecting the deviation component of the stator voltage on the δ axis at the no load running condition. Furthermore in the region with the constant power where the field weakening control was achieved, the excellent experimental results of the compensation for the deviation of the equivalent mutual inductance were shown.
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  • Shoji Nishikata, Toshiharu Arai, Teruo Kataoka
    1992 Volume 112 Issue 2 Pages 117-126
    Published: February 20, 1992
    Released: December 19, 2008
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    The dynamic performances of a field-weakening speed control system for a self-controlled synchronous motor are analyzed in detail. The effects of controller constants of the system on the mechanical and electrical dynamic responses are first explored for the case of a small change in speed reference. It is shown that the responses tend to be oscillatory if the controller gains in the system are small. The dynamic performances of the system for larger changes in the speed reference are then discussed. It is clarified that if the parameters of the margin angle control loop of the system are constant, commutation failure occurs even when step-up change in the speed reference is not so large. To enable safe commutation for larger changes in the speed reference, one way of changing such parameters depending on the change in the speed reference is proposed, and it is shown that the method introduced here is very effective. The dynamic responses for various values of inertia constant are also examined, and it is shown that good speed responses with relatively small changes in margin angle of commutation can be obtained for a considerable range of inertia constant.
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  • Hideaki Fujita, Hirofumi Akagi
    1992 Volume 112 Issue 2 Pages 127-135
    Published: February 20, 1992
    Released: December 19, 2008
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    The combined system of a series active filter and a shunt passive filter has been proposed by the authors. It has the ability to eliminate such a disadvantage of a shunt passive filter as a harmonic amplifying phenomina. The series active filter needs much smaller kVA rating than a conventional shunt active filter does. As a result, the combined system shows good filtering characteristics and high efficiency.
    This paper presents an optimum design of the shunt passive filter for a great reduction of the required kVA rating of the series active filter. It can minimize the peak voltage across the series active filter, and reduce the required kVA rating of the series active filter to 60%. The optimized system is compared in compensation characteristics with the combined system using a conventional shunt passive filter by digital computer simulation, paying attention to practical applications to large rated three-phase twelve-pulse thyristor rectifiers. Experimental results obtained by a laboratory model are shown to verify the design theory.
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  • Mineo Tsuji, Eiji Yamada, Katsuhiro Izumi, Jun Oyama
    1992 Volume 112 Issue 2 Pages 136-144
    Published: February 20, 1992
    Released: December 19, 2008
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    The two axis theory and the vector control based on this theory are well known. On the other hand, Yamamura proposed the phase segregation method (spiral vector method) for the analysis of induction motor, and suggested the field acceleration method (FAM). In this paper, the comparison of these analytical and control methods is investigated.
    At first, the equations from which the phase segregation will be derived are interpreted. In these equations, the information from 3-phase stator and rotor equations is involved. Secondly, it is clarified that the vector control system for constant rotor flux is a goal of T-I type FAM which is derived from a zero transient term condition. By using the T-I type transient equivalent circuit, the vector control system is easily obtained, because the circuit is the same as steady-state one when the amplitude of rotor flux is constant. The analytical solution of transient response for the vector control system is obtained for arbitrary initial conditions. Furthermore, the stability of T-II type FAM especially for the effect of stator resistance change is discussed by computing the torque transfer function. When the stator resistance is correctly estimated, the pole-zero cancellation occurs on the imaginary axis.
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  • Tomonori Hashiyama, Takeshi Furuhashi, Yoshiki Uchikawa
    1992 Volume 112 Issue 2 Pages 145-152
    Published: February 20, 1992
    Released: December 19, 2008
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    The face graph method with such varying elements as eyes, eyebrows, mouth, etc. is used for expressing multidimensional data. Since human beings are very sensitive to human faces, one can easily evaluate the multidimensional data expressed by the face graph.
    This paper presents a new approach of the face graph method using a fuzzy neural network (FNN) for expressing conditions of complex systems. The FNN makes it easy to understand the relationships between the parameters of the facial elements and the facial impressions. Experiments are carried out to make the face graphs correspond to the conditions of an electrical circuit.
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  • Kenji Kataoka, Kiyotoshi Komaya
    1992 Volume 112 Issue 2 Pages 153-162
    Published: February 20, 1992
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Railway scheduling is a large-scale combinatorial problem including various kinds of constraints and traffic demands. It is essentially impossible to satisfy all demands, therefore, experts must prepare practical train diagrams by compromising over some demands by trial and error methods.
    This paper describes an interactive support system for train diagram preparation, DIAPLAN (Train Diagram Planning Support System). DIAPLAN is based on expert problem solving process, and prepares a train diagram on simulating running trains and planning local schedules alternately, therefore experts can easily understand solving process and make good diagrams using DIAPLAN. DIAPLAN prepares a complete diagram automatically from given initial conditions for a train under monitoring by the experts. Whenever experts want to modify the diagram, they can take the initiative in preparing, modify and re-prepare it quickly and repeatedly. Therefore, without useless trial and error, experts can prepare the fine diagram which totally satisfies most of demands.
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  • Ken Iriuchijima, Satoru Sone
    1992 Volume 112 Issue 2 Pages 163-171
    Published: February 20, 1992
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This thesis proposes an alternative transportation system for conurbation like Greater Tokyo, assuming off-line stations and automated car operation.
    This system is characterized by group operation of cars, honeycomb network, and pre-assigned operation. It has traffic capacity sufficient to carry all the passengers seated, that are now packed standing in trains. It saves passengers time loss. Finally, the system can be constructed in less space than the present railway network as far as Tokyo downtown area is concerned.
    Group operation of cars shortens the time that passengers must spend when traveling by this system. Several cars operate synchronously to keep time loss short; 5 minutes in peak hours.
    Honeycomb network reduces system space. It covers downtown area. Compared with orthogonal lattice network for a commonly given maximum distance to nearest station, honeycomb network has 10% shorter guideway. Total length of guideway in the downtown area is 404km in this system, which is 74% of that of the present railway.
    Pre-assigned operation ensures traffic capacity sufficient for all the passengers travelling in the conurbation. The system has traffic capacity of 114 thousand passengers/h/direction per suburb-todowntown line.
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  • Takayuki Mizuno, Yukimasa Hisamitsu, Tadashi Ichioka, Takashi Toda
    1992 Volume 112 Issue 2 Pages 172-180
    Published: February 20, 1992
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    The equivalent circuit of the linear induction motor (LIM) is generally expressed as the same that of the rotating induction motor (IM). Then, the starting performance of the LIM is obtained using results of the no-load test and the lock test similar with the IM.
    However, it is almost impossible to perform the no-load test for the LIM in the factory, because it needs a special equipment to move the mover at synchronous speed. Therefore, a new method is required to calculate the performance of the LIM by simple tests without the no-load test.
    In this paper, we propose a new method which does not need the no-load test for the starting performance calculation of the LIM. At first, the results of the no-load test and the lock test for the test machine are shown. And an equivalent circuit which is suitable for the performance calculation of the LIM is proposed. Moreover, a method of determining its constants from results of the lock test is discussed.
    The starting performance calculation for the LIM was made using the proposed equivalent circuit. The calculated results for the thrust vs. speed, the current vs. speed and the power input vs. slip characteristics were satisfactorily agreed with experimental results.
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  • Hirokazu Sato, Nobuyuki Matsui
    1992 Volume 112 Issue 2 Pages 181-182
    Published: February 20, 1992
    Released: December 19, 2008
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  • Tomotsugu Kubota, Genjiro Wakui, Kazumi Kurihara
    1992 Volume 112 Issue 2 Pages 183-184
    Published: February 20, 1992
    Released: December 19, 2008
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  • Katsunori Taniguchi, Masakazu Inoue
    1992 Volume 112 Issue 2 Pages 185-186
    Published: February 20, 1992
    Released: December 19, 2008
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  • Tomonobu Senjyu, Katsumi Uezato
    1992 Volume 112 Issue 2 Pages 187-188
    Published: February 20, 1992
    Released: December 19, 2008
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