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IEE Proceedings B - Electric Power Applications

Issue 5 • Sep 1989

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Displaying Results 1 - 5 of 5
  • Single-phase sinusoidal convertor using MOSFETs

    Publication Year: 1989, Page(s):237 - 242
    Cited by:  Papers (24)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    The authors present circuit configurations of a single-phase voltage-source AC-DC convertor for applications with a small output power, in which a regenerative capability is not required. In this circuit, MOSFETs are employed so that their integral reverse-conducting diodes are available for use. The supply current can be sinusoidally controlled with a near unity power factor by means of current r... View full abstract»

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  • High-voltage stator insulation assessment by measurement of loss tangent and capacitance

    Publication Year: 1989, Page(s):229 - 236
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (724 KB)

    The measurement of the capacitance and associated loss tangent over a range of voltages is a common method of assessing insulation condition. The author considers the use of such techniques for establishing aging trends and detecting abnormalities in high-voltage rotating plant stator insulation. Whereas the inherent accuracy of the technique, as determined by laboratory measurements, is good, mea... View full abstract»

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  • Computer simulation of first pole-to-close multiple prestriking transients in motor systems

    Publication Year: 1989, Page(s):213 - 227
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (980 KB)

    Multiple prestriking transients are frequently produced in systems controlled by vacuum switching devices. The authors describe solution methods for evaluating multiple prestriking transients in a source/cable/motor controlled with a vacuum switching device. A solution method based on the Fourier transform is developed. The multiple prestriking condition is simulated by the reiterative use of volt... View full abstract»

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  • Current-forced single-phase reversible rectifier

    Publication Year: 1989, Page(s):205 - 211
    Cited by:  Papers (138)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (544 KB)

    A 7 kW voltage-sourced reversible rectifier (VSRR) which achieves bidirectional power flow between a single-phase AC supply and a DC busbar voltage is described. A current-forced control (CFC) strategy is used to switch two power transistors, enabling the device to operate with a unity power factor and a sinusoidal line current to produce a regulated DC busbar voltage. The advantages of the scheme... View full abstract»

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  • Input impedance of inverter equipment and its significance in low-frequency track circuits

    Publication Year: 1989, Page(s):243 - 248
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    The authors look at the disturbance mechanisms which may exist between inverter-controlled asynchronous traction drives and low-frequency track circuits which commonly operate at industrial frequency. They present a model for determining the input impedance of inverter-controlled equipment, such that the magnitude of a potentially disturbing interference current, due to substation-generated harmon... View full abstract»

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