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IEE Proceedings A - Physical Science, Measurement and Instrumentation, Management and Education - Reviews

Issue 3 • Date May 1985

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Displaying Results 1 - 9 of 9
  • Some aspects of transformer core loss

    Publication Year: 1985, Page(s):113 - 121
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1103 KB)

    The question of total and local measurement of loss in transformer core iron, on load and open circuit, is discussed. Local loss measurement methods are reviewed and one used to find loss levels due to flux normal to the laminations. A mechanism for the generation of such flux is hypothesised and experimental evidence of its existence is presented. Experimental results are given for a test butt-la... View full abstract»

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  • Book review: Reliability and Maintainability

    Publication Year: 1985
    IEEE is not the copyright holder of this material | PDF file iconPDF (94 KB)
    Freely Available from IEEE
  • Error estimation in sampling digital wattmeters

    Publication Year: 1985, Page(s):122 - 128
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (878 KB)

    The problem of estimating the error due to time discretisation in sampling digital wattmeters is dealt with in the paper; in particular, those instruments based on the simultaneous sampling of the voltage and current waveforms at equally spaced time instants in one or more periods are considered. As the discretisation error is a periodic function with zero mean value of the initial sampling instan... View full abstract»

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  • Book review: From Compass to Computer

    Publication Year: 1985
    IEEE is not the copyright holder of this material | PDF file iconPDF (168 KB)
    Freely Available from IEEE
  • An industry-based standards system for the measurement of power loss and apparent power of electrical sheet steel

    Publication Year: 1985, Page(s):129 - 132
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (479 KB)

    Electrical steels, which are used to form the magnetic flux paths of electrical machines, are categorised according to the specific total loss of the material determined by the Epstein frame method, under defined conditions of magnetic excitation. A brief review is given of the types of steels now produced, with a description of the primary magnetic parameters; e.g. permeability, power loss and ap... View full abstract»

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  • Optoelectronic instrument for contour comparison

    Publication Year: 1985, Page(s):133 - 135
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (464 KB)

    A new technique is described for the comparison of two contours which are nominally identical. It is applicable to two-dimensional shapes and is intended to be used in the inspection of nominally identical mechanical components by comparison with a master component. The method uses the medium of a trace generated on a cathode-ray tube, as an exact copy of the master, by an optoelectronic feedback ... View full abstract»

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  • The effect of atmospheric humidity on the corona extinction voltage of circular cylinders

    Publication Year: 1985, Page(s):136 - 138
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB)

    The corona extinction voltage for two cylindrical conductors and a vibration damper as a function of atmospheric humidity using radio influence voltage measurements has been determined. For the 5.0 cm conductor and the vibration damper, the corona extinction voltage increases with increasing humidity. It is postulated that this is due to the capture of free electrons by water-vapour molecules. For... View full abstract»

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  • Electric field measurements in long gap discharge using pockels device

    Publication Year: 1985, Page(s):139 - 146
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1572 KB)

    The optical method using a Pockels device has been used to investigate an electric field distorted by space charges due to discharge development in air. A Pockels device placed in the discharge area has the advantage of directly measuring such a field. This method is successfully applied to the measurement of the electric field in and around the leader column propagating in a rod-plane gap of 1 m ... View full abstract»

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  • Book review: Acoustic Emission

    Publication Year: 1985, Page(s):146 - 147
    IEEE is not the copyright holder of this material | PDF file iconPDF (320 KB)
    Freely Available from IEEE