IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Volume 120 , Issue 11
Showing 1-20 articles out of 20 articles from the selected issue
  • Munehiro Kamiya, Kaoru Kubo
    2000 Volume 120 Issue 11 Pages 1251-1256
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
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  • Dae-Woong Chung, Jung-Ik Ha, Seung-Ki Sul, Kozo Ide, Ikuma Murokita, T ...
    2000 Volume 120 Issue 11 Pages 1257-1264
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper describes a new sensorless induction motor drive scheme by injecting high frequency voltage signal. The signal is not a rotating one, but a fluctuating one at a synchronous rotating reference frame with the fundamental stator frequency. The difference of impedance between the flux axis and the quadrature axis at high frequency signal injection on the rotor flux angle is used to track the rotor flux angle. Since the injection signal is independent on the stator frequency, the monitoring of the differences of impedance can be done even at stand still condition of motor. Speed and current controller suitable for high frequency voltage injection are designed and verified by experiments.
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  • Shibata Kyoko, Kawaguchi Tadao
    2000 Volume 120 Issue 11 Pages 1265-1276
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Natural laws (physical laws, effects, and so on) are important information for supporting invention and development of artifacts. Then, the purpose of this study is to present a concrete “Artifact Invention Supporting System” to engineers. In this study, function denotes the core of theoretical knowledge on inventions and developments. So, a function is represented by process knowledge combining some natural laws and changing some constraints on natural laws. The research procedure is to reanalyze existing functions and to derive the aspect for new function using previous result. As a result, this paper shows three concrete examples and investigates a system to create automatically these useful knowledges adopting methods.
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  • Hirotami Nakano, Yoshinori Aono, Masanobu Naitoh, Ryou Kondou, Hiroshi ...
    2000 Volume 120 Issue 11 Pages 1277-1282
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In a 3-phase power supply, analysis of a 3-phase spectrum can be done using a conventional single-phase spectrul analyzing method. However, precise analysis of the 3-phase spectrum is difficult by the conventional analyzing method. For instance, the conventional single-phase analytic method cannot distinguish between positive-phase-sequence and negative-phase-sequence in the 3-phase power supply. To solve above problem, this paper proposes a novel 3-phase spectrum analyzer on a rotating coordinate transformation. The proposed 3-phase spectrum analyzer is quite effective for analysis of the 3-phase spectrum.
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  • Tatsumi Utsumi, Isao Yamaguchi
    2000 Volume 120 Issue 11 Pages 1283-1288
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Summary: The finite length of primary iron of linear induction motor (abbr., LIM) causes the end effect which induces unbalanced distribution of magnetic flux density in the gap varying with the velocity of secondary conductor. This fact also unbalances input currents at 3-phase terminals of LIM.
    In this paper, the authors propose an analytical method for LIM by using a 3-phase equivalent circuit instead of by using a usual single-phase one which does not represent the characteristics of unbalanced 3-phase LIM sufficiently. The estimation of all the parameter-values of the 3-phase equivalent circuit under starting condition is made by phase voltages, line currents and magnetic fluxes measured at no-load test as well as at load test. It is shown that a starting thrust calculated by using obtained parameter-values is in good agreement with the measured one. Differently from a usual LIM, the primary core of tested LIM is constructed by oriented cores in order to increase degree-of-freedom of the core configuration and to decrease the slot leakage flux.
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  • Morimasa Kajioka, Ken'ichiro Oka, Masanori Maruyama, Masaya Watada, Su ...
    2000 Volume 120 Issue 11 Pages 1289-1294
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    Currently, some of transportation systems that are in the field of the Factory Automation (FA) and Logistics practically uses direct linear motors as to driving actuator instead of conventional rotary motors. For those transportation systems, linear Induction motor (LIM) is used in popular. Recently, that systems requires higher requirements such as higher load weight, slope, vertical guide way transportation and even positioning weight load. In this paper, we present a proposal that use of the permanent magnet type linear synchronous motor (PM-LSM) for that new transportation system. Usually, the stator of the PM-LSM is arranged continuously along to the guide way (rail). It is obvious, that discontinuously arrangement of the PM-LSM's stator is effective for cost reduction to the new transportation system. However, require some new technical points.
    In this paper, we describe the results of the study to realize the discontinuously arranged PM-LSM for transportation system. At the first section, we study the effect of the magnetic attraction force between the primary part, silicon steel core stack, and permanent magnets installed in the secondary part. In following section, have proposed a simple synchronizing method and presented experiments results. At last section, presented some critical factor for the synchronization of that proposed method and utility of the new system..
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  • Yasuyuki Sugii, Michihiko Watanabe
    2000 Volume 120 Issue 11 Pages 1295-1304
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    A new traffic system, in which travel energy is supplied to electric vehicles without electrical contacts during trans-city travel, is described. On-board batteries are charged while the vehicle is traveling. A design method of this contactless power supply system is proposed. The inductive power transfer method is employed to achieve this contactless power supply system. A simulation code to optimize the magnetic circuit and the system is developed and evaluated by a miniature prototype. The estimated energy transfer rate in real scale vehicles exceeds 90%.
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  • Masaru Hasegawa, Hisanori Yamasaki, Shinji Doki, Shigeru Okuma
    2000 Volume 120 Issue 11 Pages 1305-1312
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In this paper, a new vector control system of an induction motor is proposed to suppress influences of iron loss, which has been difficult to deal with to achieve high accuracy torque control.
    Recently many methods have been proposed to improve the torque accuracy, concentrating identification of parameters and adjustment of compensators in the controllers. Thus, it's necessary to tune some parameters and compensators initially by experts.
    New method is proposed to suppress the influence of the iron loss by using a robust flux observer. By adding the decoupling control of a current corresponding to the iron loss, the vector control system with high torque control linearity can be constructed.
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  • Tetsuya Tanizaki, Koji Ueda, Masahiko Wakai
    2000 Volume 120 Issue 11 Pages 1313-1320
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    The fire detection is very important to prevent a secondary disaster and to save the assistance for safe driving in the master plan of ITS. At present, the fire detectors, which have a high sensitivity, are used in order to detect the fire in tunnels. It has problems such that the detection area is very narrow and sensor head is fouled by exhaust fumes. Compared with the fire detectors, image sensor is suitable to detect the fire, because it can cover two-dimensional wide space. We had attempted elsewhere the fire detection, which compares two histograms with various shades of gray level, by means of image processing. However, there remained problems about the influence of passing vehicle in the actual outdoors environment. The flame has characteristic such that its state is unstable and repeats growth and decay. A new approach toward the fire detection based on fluctuation of the flame has been described in this paper. Conventional fire detectors could detect only a phenomenon of the fire. However, proposal method could detect not only the flame but also its position. We conducted simulation and field tests to verify the accuracy of this method, and confirmed the effectiveness.
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  • Xing Gao, Satosi Komada, Takamasa Hori
    2000 Volume 120 Issue 11 Pages 1321-1327
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    When a closed-loop control system especially with integral compensators, has an input saturation in control object, it will become unstable for the worst case, of which unstable phenomenon is called wind up. To realize a high-speed and high-accuracy trajectory control, disturbance observer and controller are used in this paper. Because the characteristics of positive feedback of disturbance observer cause the unstable phenomenon in control system with input saturation in control object, a method, adding saturation model to disturbance observer is used to reduce its unstable phenomenon. Even if the saturation model is used, response may still deviate from the desired path because the tracking error can't be suppressed. To prevent it, a predictive control is proposed in this paper, which offers a torque input first and then inverts it at proper time respectively based on a result of future response prediction. This method is applied to both intermittent and repetitive motions. Also, to improve the predictive control, some methods are discussed, which use an estimated disturbance to modify the predictive control accuracy and adjust the inverted torque waveform and value to reduce jerk of control object. The simulation results and the experimental results show the effectiveness of the proposed methods.
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  • Chandan Chakraborty, Muneaki Ishida
    2000 Volume 120 Issue 11 Pages 1328-1334
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    A new resonant rectifier is introduced in this paper. Due to the suitability of operation in the lagging power factor mode, the series parallel CLL topology is utilized. The converter has been analyzed and simulation results have been obtained by using MATLAB. Control requirements have been identified and two new control schemes have been developed. The first scheme does not require any current sensor to improve the current drawn from the supply. The technique is to use a PI controller to maintain the output voltage constant, with an additional gain proportional to the rectified AC input voltage to create a fixed frequency modulation to improve the input current waveform. The second scheme uses a current sensor and forces both the output voltage and the input current to follow the corresponding desired references using two PI controllers. A laboratory prototype has been fabricated to realize the proposed converter topology along with the control schemes and satisfactory results have been found.
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  • Keiji Wada, Hideaki Fujita, Hirofumi Akagi
    2000 Volume 120 Issue 11 Pages 1335-1342
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper discusses harmonic propagation and damping in a long-distance distribution feeder having many capacitors for power factor correction, and presents harmonic damping characteristics of a shunt active filter based on voltage detection. A distributed-constant-circuit model for the feeder is derived to perform analysis with the focus on harmonic propagation and damping. As a result, it is clarified by theory and experiment that harmonic propagation throughout the feeder can be mitigated by installing the active filter, which acts as a harmonic terminator, on the end terminal of the feeder.
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  • Toshiro Kumon, Makoto Iwasaki, Tatsuya Suzuki, Tomonori Hashiyama, Nob ...
    2000 Volume 120 Issue 11 Pages 1343-1350
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper presents an evolutionary system identification strategy for mechatronics systems which include various nonlinearities. In the research, the saturation in power converters and the friction in mechanisms are considered as the nonlinear elements, some of which are generally difficult to detect and/or identify directly. The proposed scheme can evolutionally determine the structure of both linear and nonlinear elements in the system, where the observable input/output variables with time delay are used to express the linear components, and power series of the variables and nonlinear functions are used to express the nonlinear ones, respectively. In the evolutionary process, Genetic Algorithm (GA) is applied to optimize the combination of these variables and, as a result, the sub-optimal mathematical model for the whole system can be achieved. The effectiveness of the proposed scheme is verified by experiments using a 2-mass resonant vibration system.
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  • Kazuo Tsuboi, Isao Hirotsuka, Takayuki Mizuno, Tadashi Ashikaga
    2000 Volume 120 Issue 11 Pages 1351-1359
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    We have already proposed a six-phase pole change induction motor (a six-phase PCIM) for electric vehicles (EVs), and studied its operating principle, steady state and transient characteristics. As the results, it was clarified that the constant power operation range of the six-phase PCIM could be expanded using the pole change technique without mechanical contactors; therefore it possesses superb characteristics for miniaturizing EV driving systems. And, we have also proposed a new analysis method derived from a basic equation for the six-phase PCIM. This analysis method can be used to analyze the voltage, the current and the torque characteristics in the transient state as well as in the steady state of the six-phase PCIM.
    In this paper, it is clarified that the smooth pole change operation of the six-phase PCIM is possible under some conditions. And the close agreement between measured and simulated results of the pole change operation of the six-phase PCIM driven by a six-phase INV is obtained. Also, it is found that the six-phase PCIM driven by the six-phase INV can operate the smooth pole change operation. As the results, the characteristics at the pole change operation of the six-phase PCIM are clarified. And, it is shown that six-phase PCIM has very high practicability.
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  • Kazuyoshi Hitosugi, Hiroyuki Kaneda, Shoji Moriyasu, Noriyuki Nanba
    2000 Volume 120 Issue 11 Pages 1360-1368
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    The bus transfer is an operating system to improve the plant reliability by the quick changing-over of the operating bus. The large transient current and torque occur at the time of the bus transfer. Transient analysis of induction motor with squirrel cage winding is usually calculated with the constant impedance of the secondary circuit. But, it needs considering the skin effect of the cage bars for the analysis, because the secondary impedance changes with the secondary frequency by the skin effect.
    This paper proposes about transient phenomena at the time of the bus transfer by using the secondary circuit models of the induction motor with squirrel cage winding by considering the skin effect.
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  • Shinji Shinnaka
    2000 Volume 120 Issue 11 Pages 1369-1375
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper proposes a newly developed frequency-hybrid (FH) vector control scheme with monotonously-increasing-region (MIR) strategy for sensorless cylindrical synchronous motor drive. It is confirmed through tests using a 750 (W) motor that the proposed sensorless scheme has the following high potential: 1) it operates in both torque and speed controls, 2) it operates in both motoring and regenerating modes, 3) torque producing characteristics has good linearity over the rated torque range under constant speed, 4) for steady speed performance with correct flux orientation, its speed ratio based on rated speed is about 1/300 under motoring rated load and 1/200 under regenerating rated load, 5) for transient speed performance, its servo-tracking ability allows to track speed command of acceleration±5, 000 (rad/s2) under no-load.
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  • Junichi Miyashita, Masayuki Mitsuzawa, Toshiyuki Karube, Kiyohito Yama ...
    2000 Volume 120 Issue 11 Pages 1376-1381
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    On the reducing procedure of conducted emissions, it is helpful to know the noise source impedance. This paper presents a method to measure noise source complex impedances of common and differential mode separately. We propose a line impedance stabilization, network (LISN) to measure common and differential mode noise separately without changing LISN impedances of each mode. With this LISN, conducted emissions of each mode are measured inserting appropriate impedances at the equipment under test (EUT) terminal of the LISN. Noise source complex impedances of switching power supply are well calculated from measured results.
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  • Hirotaka Sasaki, Ryo Watanabe
    2000 Volume 120 Issue 11 Pages 1382-1390
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In this paper, we study the active rolling control of ships by active mass dampers. As the movable range of the mass on the ship is finite, the control system must include restriction on the mass position to protect the device and the ship. This restriction usually causes windup phenomenon and control performance is deteriorated seriously. We adopt anti-windup technique to improve the control performance and demonstrate its efficacy by simulation.
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  • Hiroyuki Ogiwara, Mutsuo Nakaoka
    2000 Volume 120 Issue 11 Pages 1391-1392
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    In recent years, soft-switching resonant type DC-DC converters using the latest power semiconductor switching devices have attracted their special interests in the specific power electronics application fields. This paper describes the zero-current soft-switching (ZCS) DC-DC converter topology incorporated resonant switches into the conventional series resonant half-bridge inverter circuit configuration. The proposed soft switching DC-DC converter can effectively operate under a ZCS transition on the basis of a fixed frequency and phase-shifting control strategy for output voltage regulation. The trially-produced resonant type DC-DC converter using B-SIT is presented for the switching DC power supply and its performances are discussed from a practical point of view.
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  • Yoshihiro Konishi, Mutsuo Nakaoka
    2000 Volume 120 Issue 11 Pages 1393-1394
    Published: November 01, 2000
    Released: December 19, 2008
    JOURNALS FREE ACCESS
    This paper presents a novel type flyback DC-DC converter using snubber energy regenerative circuit. The proposed snubber regenerative circuit consists of passive circuit components such as auxiliary transformers, inductors, capacitors and diodes, and has a high reliability. The operation principle is described on the basis of simulation evaluations. The turn-on and -off soft-switching operations of active power switch can be achieved by the proposed new snubber circuits with auxiliary transformers
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