巻号一覧
124 巻, 2 号
選択された号の論文の17件中1～17を表示しています
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論文
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入江 寿一, 大橋 俊介2004 年 124 巻 2 号 p. 153-159
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーThe immittance converter is the combined word for the impedance-admittance converter. The immittance converter has an input impedance that is proportional to the admittance of the load connected across output terminals. In this converter, the output current is proportional to the input voltage and the input current is proportional to the output voltage. Consequently, it converts a constant voltage source into a constant current source and a constant current source into a constant voltage source.
It is well known that the quarter-wavelength transmission line shows immittance conversion characteristics. However, it has very long line length for the switching frequency, and is not suitable for power electronics applications. So we proposed immittance converters that consist of lumped elements L, C and show improved immittance conversion characteristics at a resonant frequency.
A three-phase constant current source is proposed in this paper. It is possible to realize this by a simple circuit using an immittance converter. In this paper, circuit operation, characteristic equations and results of simulation are described.抄録全体を表示PDF形式でダウンロード (193K) -
CTCSS (Cluster Tool Controller Software System)佐藤 隆, 吉田 栄治, 掛林 康典, 薦田 憲久2004 年 124 巻 2 号 p. 160-167
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーThe semiconductor manufacturing industry has continued drastic growth with frequent change of the process technology. The control system for the SPE (Semiconductor Processing Equipment) requires flexibility for the change of the process equipment and prompt installation. We have developed the CTCSS (Cluster Tool Controller Software System) that could realize flexible restructure of the system by the mediation function between the cluster tool controller (CTC) and distributed lower level process module controllers (PMC). In the framework of CTCSS it is possible for existing CTC to reconstruct control system without detailed information of PMC. It has proved that by the methodology of CTCSS we can make the flexible control system for SPE and delivery could be made half.抄録全体を表示PDF形式でダウンロード (1227K) -
岡 正人, 内堀 晃彦, 長縄 明大, 森岡 弘, 田中 幹也2004 年 124 巻 2 号 p. 168-174
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーIn this paper, we propose PI controller combined with neural network (NN) for position and tracking control of ultrasonic motor (USM). In the conventional fixed gain PID controller, it is difficult to achieve precise control. Because the input-and-output characteristics of USM change with temperature rise or fluctuation of load-mass. In this design method, NN controller is used to compensate these characteristics fluctuation. Weights of NN are adjusted by back propagation method so that control error may be minimized. Moreover, variable frequency method is used for the control input in order to simplify drive circuit and realize quick response. The effectiveness of the proposed design method is confirmed by experiments using the existent USM.抄録全体を表示PDF形式でダウンロード (185K) -
松岡 孝一, 近藤 稔, 清水 康弘2004 年 124 巻 2 号 p. 175-182
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーVentilated type traction motors are widely used for railway vehicles. However, they require overhauls to clean up inside them. Besides, they are a major noise source in railway vehicles. To solve these problems, we propose a totally-enclosed type traction motor using permanent magnet synchronous motor, that have the same weight power ratio as that of conventional ventilated type traction motor. In this paper, we report the test results of the proposed motor. The test results demonstrates that the temperature rise values are within its limit and the noise level is decreased by 10 dB compared to conventional motor.抄録全体を表示PDF形式でダウンロード (1262K) -
川邊 武俊, 谷口 育宏2004 年 124 巻 2 号 p. 183-189
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーThis paper deals with a robust control method for a magnetic-driven-type actuator. The actuator is driven by electromagnets positioned around an armature connected to an actuated object. The armature is suspended by springs with a large spring rate, enabling it to move at high speed. A feedback controller has been designed to adjust the magnetic force so as to moderate the speed of the armature when it comes in contact with the magnets, thereby reducing mechanical shock and noise. Difficulties in designing the controller stem from magnetic force properties, such as severe instability and nonlinearity, which prevent push-pull type actuation. To overcome such difficulties with sufficient robustness, a new control scheme, which is derived from considaration of the armature motional trajectory has been developed. The control sheme is realized as a simple structured controller: a disturbance observer and a pole assignment compensator. The effectiveness of the control scheme is verified by computer simulation results and experimental results using a test rig.抄録全体を表示PDF形式でダウンロード (257K) -
関口 邦男, 安部 可治, 今成 宏幸2004 年 124 巻 2 号 p. 190-195
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーIt is important for hot strip mill to keep finishing mill delivery temperature to it’s target value because of yield strength and tensile strength of rolled strip. We propose a new method for finishing mill delivery temperature control (FDTC) of a hot strip mill using inter stand strip coolant (ISC). FDTC consists of initial setting (before threading) values calculation of ISC flow rate and finishing mill speed, feed forward FDTC (FF-FDTC) and feedback FDTC (FB-FDTC). The mathematical strip temperature model of finishing mill was identified using normal operating data and some tests. Actual mill application with 7 stands finishing mill showed good FDTC results and also it made possible to increase rolling speed which increase production rate.抄録全体を表示PDF形式でダウンロード (320K) -
ゴドレール イヴァン2004 年 124 巻 2 号 p. 196-201
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーSensing of physical quantities is often accompanied by generation of periodic error signals. Especially in the case of rotary type sensors, periodic error signals are difficult to be avoided. In this paper, we present a method to compensate periodic error signals by gain tuning in multiple pick-up sensors. A mathematical model of the periodic error signal and a method to compensate the error is presented. It is shown that gain adjustment in a minimum of three pick-ups is needed to compensate any frequency component of the error signal. Minimum number of pick-ups needed to compensate multiple frequency components of the error signal is also derived. The method is successfully demonstrated on simulated and experimental examples, where one and two frequency components of the error signal are successfully compensated. Reduced periodic error increases the sensors accuracy and allow higher resolution for digital sensors.抄録全体を表示PDF形式でダウンロード (149K) -
小林 貴彦, 武田 洋次, 真田 雅之, 森本 茂雄2004 年 124 巻 2 号 p. 202-207
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーThe recent trend of an interior permanent magnet synchronous motor (IPMSM) is shifting from distributed winding to concentrated winding for the purpose of downsizing, high efficiency and natural resources saving. The IPMSM with concentrated winding, however, is noisy because of the stator frame deformation by the radial forces. This paper reports flux barriers preventing flux short circuit arranged in the rotor for the purpose of preventing demagnetized, reducing the torque ripple and the cogging torque also reduce the radial force that causes the acoustic noise and the vibration. The improvements of reducing the radial force and the torque ripple at high torque operation by making some holes inside the rotor are examined. The vibration, efficiency by the experiments and the analytical results are evaluated. It is cleared that the vibration of the IPMSM with holes inside the rotor is reduced without decreasing the efficiency.抄録全体を表示PDF形式でダウンロード (551K) -
平本 健二, 武田 洋次, 真田 雅之, 森本 茂雄2004 年 124 巻 2 号 p. 208-214
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーInterior permanent magnet synchronous motor (IPMSM) is efficient and can be operated in wide speed region; therefore it is used widely. However, torque ripple of reluctance torque assisted motors, for example IPMSM and synchronous reluctance motor (SynRM), is very large. The skew is known in the prior art as a torque ripple reduction method of AC motors. Although the skew is effective for torque ripple reduction, structure is complicated and it has the disadvantage that average torque will decrease. The discontinuous variation of magnetic resistance between flux barriers and teeth cause the torque ripple. In this paper, in order to ease the discontinuous variation of magnetic resistance, flux barriers are asymmetrically designed so that the relative position relation between flux barriers and teeth may not be in agreement as much as possible. As a result, the torque ripple can be reduced dramatically without the average torque decrease. The experimental motor has been fabricated and the results of measuring torque ripple prove the validity of the torque ripple reduction using asymmetric flux barriers.抄録全体を表示PDF形式でダウンロード (929K) -
岩根 裕典, 舟木 剛, 引原 隆士2004 年 124 巻 2 号 p. 215-222
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーPhotovoltaic power systems (PV systems) are increased. Most of PV systems are controlled with keeping high power factor because the output power ratio to power system capacity is sufficiently small. Recently, single phase PV systems are placed increasingly. They possibly cause an imbalance of three phase voltages and currents. This paper proposes a linkage method for single phase PV systems in order to compensate the imbalance. An estimation of imbalance is introduced based on instantaneous real and imaginary power theory. It is confirmed that the proposed control strategy achieves to minimize the estimation of imbalance theoretically and experimentally.抄録全体を表示PDF形式でダウンロード (593K) -
田中 満, 片岡 正俊, 小泉 寿男2004 年 124 巻 2 号 p. 223-229
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーAs the market changes more rapidly and new products continue to get more complex and multifunctional, product development collaboration with competent partners and leading users is getting more important to come up with new products that are successful in the market in a timely manner. ECM (engineering chain management) and SCM (supply chain management) are supply-side approaches toward this collaboration. In this paper, we propose a demand-side approach toward product development collaboration with users based on the information gathered through user support interactions. The approach and methodology proposed here was applied to a real data set, and its effectiveness was verified.抄録全体を表示PDF形式でダウンロード (1177K) -
山本 勇, 松井 景樹, 森 秀樹, 八尾 祐吾2004 年 124 巻 2 号 p. 230-237
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーA dc-dc converter is being widely used for various household appliances and for industry applications. The dc-dc converter is powered from single battery, and the voltage is varied according to the purpose. In the vehicle, various accessories whose electric power is different are being used. Thus, plural number of dc-dc converter should be provided, so these situations bring complicated circuits, and accordingly, higher cost. Moreover, this is not limited to the vehicle applications. For instance, for analog circuits and digital circuits, various power supplies with different voltages are used sometimes. Under such backgrounds, in this paper, we propose a novel dc-dc converter with simply circuit configuration which can supply to two or more different output loads. This converter can control output voltages by controlling duty ratio by using typically two switching devices, which is composed by single boost-switch and single buck-switch. The output voltage can be controlled widely. A few modified circuits developed from the fundamental circuit are represented including the general multi-load circuit. Theoretical equations are solved, where results are confirmed by simulations and experiments.抄録全体を表示PDF形式でダウンロード (951K) -
寺田 賢治, 山戸 一宏, 宮原 宏幸, 大田 昌平2004 年 124 巻 2 号 p. 238-246
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーThe welding is the important basic technology of joining two materials together. The quality is influenced in the skill of the personwho carried out the welding. Therefore, the welding license examination and the welding skill contest are carried out in each prefecture. The judge checks the height and width of the welding bead by using caliper whether it has satisfied the standard value. In addition, the beauty is evaluated and the score is decided by the visual observation. Therefore if the judge is different, it is different in the decision for the same weld bead. In this paper, the authors propose a system of quantitative evaluation of the welding bead by using three-dimensional data obtained by the slit light projecting method.抄録全体を表示PDF形式でダウンロード (576K) -
中村 太郎, 嵯峨 宣彦, 中沢 賢2004 年 124 巻 2 号 p. 247-254
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーHomogeneous ER fluid is one of the smart fluids, having properties by which their apparent viscosity coefficient can be controlled according to the strength of an electric field applied to them. However, the ER effect of the fluid is easily changed by shear rate variation or temperature variation.
In this study, a viscous coefficient control method using Sliding Mode Control is proposed, to enable a more effective use of the ER fluid, and demonstrate the application of the control method to a developed homogeneous ER clutch. Further, this controller is applied to a robot arm with elastic joints, which the clutch is installed in order to study about the effects of the control system.
The results of our experiment clearly show that the viscous coefficient of the clutch has been accurately and speedily controlled to the desirable viscous coefficient by the proposed control method. Therefore, by applying the proposed control method, it is possible to obtain a reliable ER device without being influenced by variations of this fluid property.抄録全体を表示PDF形式でダウンロード (469K) -
Claudio Y. Inaba, 小西 義弘, 中岡 睦雄2004 年 124 巻 2 号 p. 255-261
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーIn this paper, a two-switch high frequency flyback transformer type zero voltage soft switching PWM DC-DC converter using IGBTs is proposed. Effective applications for this power converter can be found in auxiliary power supplies of rolling stock transportation and electric vehicles. This power converter is basically composed of two active power switches and a flyback high frequency transformer. In addition to these, two passive lossless snubbers with power regeneration loops for energy recovery, consisting of a three winding auxiliary high frequency transformer, auxiliary capacitors and diodes are introduced to achieve zero voltage soft switching from light to full load conditions. Furthermore, this power converter has some advantages such as low cost circuit configuration, simple control scheme and high efficiency.
Its operating principle is described and to determine circuit parameters, some practical design considerations are discussed. The effectiveness of the proposed power converter is evaluated and compared with the hard switching PWM DC-DC converter from an experimental point of view and the comparative electromagnetic conduction and radiation noise characteristics of both DC-DC power converter circuits are also depicted.抄録全体を表示PDF形式でダウンロード (407K)
研究開発レター
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小笠原 悟司, 岡村 晋吾2004 年 124 巻 2 号 p. 262-263
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリーThis paper proposes a flux position estimation of induction motors based on magnetic saturation. It is demonstrated experimentally that the method can estimate the flux position even at zero frequency, and that the estimation has a good accuracy at the rated flux level.抄録全体を表示PDF形式でダウンロード (89K)
errata
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2004 年 124 巻 2 号 p. E1
発行日: 2004年
公開日: 2004/05/01
ジャーナル フリー
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