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IEEE Translation Journal on Magnetics in Japan

Issue 8 • Date Aug. 1990

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Displaying Results 1 - 19 of 19
  • [Front cover]

    Publication Year: 1990, Page(s): c1
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  • List of contributors

    Publication Year: 1990, Page(s): nil1
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  • [Breaker page]

    Publication Year: 1990, Page(s): nil1
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  • Table of contents

    Publication Year: 1990, Page(s): 625
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  • Reduction in Core Loss in Amorphous Cut Cores with Air Gaps

    Publication Year: 1990, Page(s):626 - 632
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (794 KB)

    In order to reduce core losses in amorphous cut cores with air gaps, the effects of ferrite plates attached to the cut surfaces of the cores were investigated. It was learned that the attachment of thin ferrite plates decreases the core loss remarkably in such cores. It was also discovered that this method of reducing core loss is effective for magnetic induction levels up to 0.1 T. Computer simul... View full abstract»

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  • Analysis of Ferroresonant Voltage Stabilizer with Filter

    Publication Year: 1990, Page(s):633 - 639
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    The performance of a ferroresonant voltage stabilizer with a filter connected is described. In carrying out the analysis, a phasor method was adopted for the linear circuit, and a discrete Fourier transform was used for the nonlinear circuit. From the results obtained by numerical analysis, the optimum circuit constants, which stabilize the output voltage and minimize the self-capacitance of the e... View full abstract»

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  • Parallel Operation of Magnetic Frequency Triplers

    Publication Year: 1990, Page(s):640 - 647
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (926 KB)

    Magnetic frequency triplers provide high reliability and a good output waveform, and therefore have been widely. used This paper reports experiments and analyses of the parallel running of two frequency tripler units to increase the capacity of the device. Parallel running creates a problem involving effective loads, in which the frequency tripler whose self-impedance has a proportionately smaller... View full abstract»

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  • Compensation Method for Phase Distortion of Output Voltage in the Three-phase Triport UPS System

    Publication Year: 1990, Page(s):648 - 654
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (611 KB)

    A new three-phase constant-voltage transformer is described. In this circuit, load unbalance and input voltage asymmetry can in principle be removed by ring-connected compensation windings. When the, triac of an Automatic Voltage Regulator (AVR) is controlled to give a constant output voltage, phase differences between the output voltages are kept at 120°. This principle can also be applied to co... View full abstract»

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  • An Analysis of Orthogonal-Core Type Push-Pull Parametric Transformer with Nonlinear Load

    Publication Year: 1990, Page(s):655 - 661
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1152 KB)

    The authors report an analysis of the orthogonal-core type push-pull parametric transformer with nonlinear load. The oscillation voltage and input current of the parametric transformer are calculated when a bidirectional triode-thyristor is connected to the output of the transformer on the basis of the magnetic circuit model of the orthogonal-core. The analytical results show good agreement with t... View full abstract»

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  • Relation between the Exciting Voltage Waveform and the Stability of Oscillation in the Parametric Motor

    Publication Year: 1990, Page(s):662 - 668
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    The relation between the exciting voltage waveforms and the stability of oscillation in the parametric motor is discussed. The main conclusions drawn from this study are as follows: (1) The stable region of the parametric motor excited by square wave voltage is larger than that excited by triangular and sinusoidal wave voltage. (2) The parameter which has a direct effect upon the stability of para... View full abstract»

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  • Analysis of Linear Parametric Motor Based on a New Magnetic Circuit Model

    Publication Year: 1990, Page(s):669 - 675
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    This paper describes an analysis of the behavior of a linear parametric motor. The primary of the linear motor uses a 4-legged laminated iron core and the secondary is constructed with aluminum plate and Fe-Si sheets. The oscillation voltage, currents and static thrust of the linear motor are calculated numerically based on a magnetic circuit model. The calculated values agree well with the measur... View full abstract»

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  • A Method of Estimating Magnetic Reluctivity by Inverse Problems

    Publication Year: 1990, Page(s):676 - 682
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (803 KB)

    We propose a method for estimating magnetic reluctivity for application in nondestructive testing and medical electronics. The combination of the finite element method and the measured data, one of the inverse problems, makes it possible to estimate magnetic reluctivity. Formulations for the estimation and the accuracy of the estimated values are reported. According to numerical experiments using ... View full abstract»

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  • Formation of a Diffractional Grating by Magnetic Lithograph

    Publication Year: 1990, Page(s):683 - 689
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2487 KB)

    A new method to make an optical diffraction grating has been developed using the Bitter method. A periodic magnetic pattern like 0101 ... is written in a magnetic memory medium, and a magnetic fluid is used as magnetic toner to visualize this pattern. To enhance the contrast of the grating, an interfacial active agent in the magnetic fluid is destroyed by a certain organic solvent, and a DC magnet... View full abstract»

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  • Study of a Trial Production of Magnetic Gear with Variable Circular Arc Tooth Profile

    Publication Year: 1990, Page(s):690 - 696
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    The design and overlap area of permanent magnets in meshing area and performance characteristics of circular arc magnetic gear are described. The transmitted torque or circular arc magnetic gear increases by 6% as compared to an involute magnetic gear of the same dimensions. This phenomenon is a result of the increase in the permanent magnet overlap area increasing in the meshing area using a vari... View full abstract»

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  • The Stress-Magnetic Properties of Amorphous Magnetic Alloy

    Publication Year: 1990, Page(s):697 - 703
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (799 KB)

    Effects of internal shear stress applied by torque on the magnetic properties of Fe-based amorphous alloys were studied under weak magnetic fields of less than 800 A/m, where strips were helically bonded onto the shaft so as to form an angle of 45° with respect to the thrust direction. It was found that the permeability of each amorphous alloy in different gluing conditions reached for each sampl... View full abstract»

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  • Effect of Excitation Magnetic Field on Characteristics of Magnetostrictive Torque Sensors

    Publication Year: 1990, Page(s):704 - 710
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1347 KB)

    Characteristics of a magnetostrictive torque sensor were studied in the excitation current range 10~1000 mA and at excitation frequencies from 1 kHz to 100 kHz. Ni-Cr-Mo steel (JIS standard SNCM439) ferromagnetic material was used in an experimental shaft because of its high mechanical strength under applied torques ranging - 1500~1500 Nm. As the excitation current was increased, the sensor sensit... View full abstract»

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  • Development of the Absolute Type Magnetic Encoder Suitable for Thinner Structure

    Publication Year: 1990, Page(s):711 - 719
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1871 KB)

    Rotary encoders are often used as position detectors in robot control systems and are of two types: optical encoders and magnetic encoders. Magnetic rotary encoders have attracted attention for their durability in unclean environments, reliability at low temperatures, excellent shock resistance, and wide variety of designs. Such encoders can function in two different ways; detecting either relativ... View full abstract»

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  • [Advertisement]

    Publication Year: 1990, Page(s): 720
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  • [Advertisement]

    Publication Year: 1990, Page(s): nil2
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Aims & Scope

IEEE Translation Journal on Magnetics in Japan is a publication of the IEEE Magnetics Society published between 1985 and 1994.

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Meet Our Editors

Editor-in-Chief
James E. Opfer
Hewlett-Packard