IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Volume 115 , Issue 8
Showing 1-20 articles out of 20 articles from the selected issue
  • Yoichi Kaya
    1995 Volume 115 Issue 8 Pages 957
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (1129K)
  • Nobuyuki Kaya
    1995 Volume 115 Issue 8 Pages 958-968
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (2197K)
  • Tokuo Ohnishi, Masaya Furuhashi
    1995 Volume 115 Issue 8 Pages 969-977
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    We propose a new multi-functional single phase PWM inverter for solar power generation system. In this case, it is important to construct the main circuit with simple circuit configuration and control. The proposed single phase inverter with an AC line switch can be constructed only by a three phase inverter module. The functions of the inverter are as follows; 1) an inverter to send the solar cell energy to the utility line, 2) a power line conditioner with an active filter and a reactive power compensator and line voltage controller at the line connecting mode. and 3) an uninterrupted power supply at the line power failer and so on. These are desirable from view points of improving the cost performances of the system.
    In this paper, the proposed control circuit and the principle of operation, the control functions and their control characteristics are described. Then some simulation results of the system with many functions are shown. The feasibility of the inverter system are verified by experimental results.
    Download PDF (3605K)
  • Takumi Matsuo, Toshiji Kato
    1995 Volume 115 Issue 8 Pages 978-983
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    The series resonant type DC-DC converter with clamped tank capacitor voltage is very effective to reduce the resonant tank voltage and to avoid inverter arm short-through due to diode recovery times. However, the clamping diodes make the operation complex, which is difficult to apply the conventional analytical method. In this paper, a numerical method is applied to investigate the operation. The circuit is found to have 108 topological modes and 32 operation modes. The results are validated through experimental results of a proto-type MOS FET circuit.
    Download PDF (1678K)
  • Tokuo Ohnishi, Yoshikazu Minamoto
    1995 Volume 115 Issue 8 Pages 984-990
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    New PWM technique for the current fed type PWM Converter is proposed. As the control variables, the instantaneous active and reactive power are used instead of the line current. They are proportional to the instantaneous active and reactive current vector. The switching state of the PWM converter is given by the selection method of the appropriate current vector among the 7 kinds of the current vectors with the zero current vector. The active current is controlled by the zero current vector and the reactive current depends on the kind of the selected current vector. These variables are basically controlled by PWM switching from two kinds of the hysteresis comparator. In addition to this, the compensation of the filter circuit can be automatically obtained by the PWM control based on the active and reactive current detected from the source current.
    In this paper, the principle of the PWM technique for the current source PWM converter is proposed. Then, some simulation results are shown. After that, the feasibility of the system is verified by experimental results.
    Download PDF (1199K)
  • Naoki Oda, Toshiyuki Murakami, Kouhei Ohnishi
    1995 Volume 115 Issue 8 Pages 991-998
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper describes a decoupling force control strategy of redundant manipulator by workspace observer. In general, the calculation process of the redundant manipulator becomes complicated as the number of degree-of-freedom motion increases since the controller includes the pseudo inverse Jacobian matrix. To improve this issue, we develop a simplification method of the inverse kinematics solution including null space calculation by using the transposed Jacobian matrix, and the workspace observer. Here the stable condition of the proposed controller is also shown. Its condition is an important index to construct the stable workspace observer.
    The validity of the proposed method is confirmed by the numerical and experimental results in the 3link planar redundant manipulator.
    Download PDF (933K)
  • Bangji Gong, Michio Nakano, Takashi Koga
    1995 Volume 115 Issue 8 Pages 999-1005
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Servo system that is tracking the reference input fastly and finely is demanded in industries. For the realization of this, many control methods using an nonlinear element have been presented. The characteristic of servo system designed by these mothods is improved in contrast to linear ones. But these systems are too sensitive to parameter variation, so the effect of variation must be considered.
    To solve this problem we proposed Nominal Model Tracking System. In this method, a robust compensator is designed with H control theory. As a result, the robust system that is less sensitive to parameter variation is obtained. But since we didn't consider the structure of parameters in the method where all variation is regarded as a single variation of plant's transfer function, the variation that doesn't exist is included. Therefore the scope of robust stability may be narrowed.
    In this paper, We discuss Nominal Model Tracking System again with μ-synthesis control theory. Through considering structured variation, we expect that the new system will have robust performance in a wider scope of parameter variation.
    As an application, we use the method to the speed control of motor system. From computer simulations, we can show that the method is effective.
    Download PDF (1098K)
  • Tsutomu Yokozuka, Hideomi Sekine, Eiji Baba, Shuaiwen Hu, Takashi Kenm ...
    1995 Volume 115 Issue 8 Pages 1006-1014
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Equivalent circuit parameters are obtained on 19 test motors, whose outputs are in 5.5KW to 6100 hp range of sizes, by which the calculated characteristics such as current, input and slip coincide quite closely with measured ones, and characteristic errors are obtained. Variation of the secondary equivalent circuit parameters with the secondary frequency f2 is obtained. It is shown that the secondary resistance r2 increases with f2 decreases in some motors. Effects of the shape of the rotor slot and magnetic saturation on the secondary circuit parameters are investigated. Effects of the no-load test voltage on the secondary equivalent circuit parameters, and characteristic errors are discussed.
    Download PDF (1530K)
  • Katsumi Kesamaru, Sakutaro Nonaka
    1995 Volume 115 Issue 8 Pages 1015-1020
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper proposes two types of new structures for the brushless self-excited single-phase synchronous generator. Both stator and rotor of generator are eqiupped with the concentrated windings. The rotor consists of field winding short-circuited with a diode. These generators are simple and robust, so that the generator can be easily producted. The voltage induced in the field winding by the reverse revolving field due to single-phase armature reaction is half-wave rectified. Then the self-excitation is achieved. The output voltage can be almost kept constant without AVR.
    To investigate the characteristics of these generators, the fmite element method, by which the electromagnetic and electric circuit equations are solved directly, is applied. The generator is strictly simulated, taking into account of magnetic saturation and diode's interruption phenpmena. It is confirmed that the results of theoretical analysis agree well with the experimental results.
    Download PDF (1697K)
  • Takeshi Katagi, Junya Matsuki, Takao Okada
    1995 Volume 115 Issue 8 Pages 1021-1029
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    With the recent advancement of power elentronics technology, thyristor-controlled equipments have been largely introduced to the electric power system. These devices generate harmonics which cause voltage distortion and undesirable effects on the power system components. On the other hand, the damper windings of synchronous generator are basically designed to reduce harmonics as well as to damp out system oscillations. However, up to now, the effects of damper windings on harmonics have not been fully clarified quantitatively.
    In this paper, the results of experimental study on harmonics reduction effect of damper windings have been presented. A specially designed 6kVA generator was connected to an infinite-bus system to investigate the characteristics of damper windings. A new method to measure induced voltages between damper bars, damper bar currents and air-gap flux densities in the tested generator was established. By comparing these measurements with and without the presence of damper windings, the effect of damper windings was quantified. Thus the reduction effects of the damper windings on slot ripples and harmonics caused by armature current mmf were investigated and were made clearer than before by the proposed method.
    Download PDF (1643K)
  • Tsutomu Matsui
    1995 Volume 115 Issue 8 Pages 1030-1037
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper presents a high-performance, three-axis lens actuator for high-density disc players, for instance, MUSE (Multiple SubNyquist Sampling Encoding) disc players. The sustained lens position stability at the designed point was improved by inventing a wire-spring suspension system, which has been introduced to gain a high-quality, signal-to-noise ratio (SNR) video signal that equalled 45 dB in baseband Hi-Vision. Compared to the rubber-spring suspension, the wire-spring suspension has better in temperature stability and pull-in servo in the jitter direction. The damping methods invented are double-wire suspension in the jitter direction, gel-box damping in the tracking direction and both methods in the focusing direction.
    Download PDF (1879K)
  • Takayuki Torikai, Yoshikuni Akiyama, Yukihiro Toyoda, Takayoshi Oyama, ...
    1995 Volume 115 Issue 8 Pages 1038-1045
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Diesel engines have been widely used as electrical power sources for small islands and also as mechanical power sources for ships under the isolated circumstances. Therefore, failure diagnosis is of great importance. The paper pays a great attention to the abnormal sealing of exhaust valves, because it occurs frequently and tends to grow into a serious failure.
    Based on the data obtained from artificial failure tests using an actual engine, pattern recognition theory was applied to the time series of the longitudinal vibration signal measured by accelerometers on cylinder heads. The paper proposed a method to discriminate between failures in sealing of exhaust valves and in fuel injection timing. Effectiveness of the method was finally verified with experiments.
    Download PDF (2700K)
  • Ken Kato, Yasuhiro Kasuga, Masanori Fujiwara, Kazuo Onda
    1995 Volume 115 Issue 8 Pages 1046-1053
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Laboratory-scale and parametric experiments of SO2, and NOx, removal from the simulated combustion gas by pulsed corona discharge have been performed changing the combustion gas composition and temperature, the electrode configuration of plasma reactor and the polarity of high-voltage electrode. The following results are obtained, 1) the higher the concentration of H2O and O2, the higher the efficiency of desulfurization and denitrification at the same specific input, 2) the pulsed corona discharge with a voltage pulse-width as short as 200 ns of negative polarity shows the possibility to attain almost 90% deSOx and de NOx efficiency at the specific discharge input of 20 J/g, which is almost the same as the specific input in the electron-beam process, 3) the de NOx characteristics shows a little temperature dependence in the range of 70_??_130°C, but the de SOx efficiency increases rapidly in the temperature region below 100°C suggesting the thermochemical dependence of deSOx reaction, 4) when desulfurization and denitrification proceed, the white dendritic powder deposits on the plasma reactor which composition is identified to be 49 mol % of (NH4)2SO4 and 47 mol % of 2NH4NO3 • (NH4)2SO4, and the ratio of SO2, NO and NH3 of the deposit is almost equal to that of supplied gas.
    Download PDF (3347K)
  • Takesi Sugimoto
    1995 Volume 115 Issue 8 Pages 1054-1063
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Many types of regenerative braked cars are being introduced in dc electric railway for energy saving. Recently specially inverter cars are being placed in service. In East Japan Railway Company inverter control cars (type 209) have their regeneration coefficient mutch increased from about 25% to about 33% as compared with cars (type 205) with superposed field excitation control.
    We may expect the regenerative coefficient to be lowered by invalidation on particular sections or particular time zoon, so we must search for the dc feeding system which can level up the regenaration coefficient. On the other hand, recently thyristor rectifier substations are being built to superannuated silicon rectifier substations. We can control the feeding voltage of substation. In the case of inverter cars such as type 209 the author has studied the quantitative effect of saving enegy with many kinds of feeding voltage control system, and demonstrated with simulation the increase in regenerative power and decrease in power consumption without levellig down the acceleration ability of cars.
    Download PDF (2046K)
  • Hayato Oishi, Hidehiko Okada, Kouichi Ishizaka, Ryozo Itoh
    1995 Volume 115 Issue 8 Pages 1064-1065
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (1059K)
  • Hideki Kishimoto, Mitsunao Okumura
    1995 Volume 115 Issue 8 Pages 1066-1067
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (1894K)
  • Hideo Sekimoto, Yasuhiro Nakashima
    1995 Volume 115 Issue 8 Pages 1068-1069
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (905K)
  • Seiji Hashimoto, Kenzo Kamiyama
    1995 Volume 115 Issue 8 Pages 1070-1071
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (1179K)
  • Masakazu Isogai, Kenzo Kamiyama
    1995 Volume 115 Issue 8 Pages 1072-1073
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (1272K)
  • Masahiko Akiyama, Kohji Kobayashi, Ichiro Miki
    1995 Volume 115 Issue 8 Pages 1074-1075
    Published: July 20, 1995
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Download PDF (1041K)
feedback
Top