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IEE Proceedings B - Electric Power Applications

Issue 1 • Date Jan 1990

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Displaying Results 1 - 6 of 6
  • Novel synchronous machines: linear and disc

    Publication Year: 1990, Page(s):49 - 58
    Cited by:  Papers (20)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (760 KB)

    The author considers some of the developments that have taken place over the last few years in the field of synchronous machines of unusual geometry. Linear synchronous motors are a comparatively new development; they have the virtue of considerable higher force production but require a variable frequency supply. However, in small sizes, power integrated circuits have become available that can be ... View full abstract»

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  • Calculation of commutation spikes and harmonics on offshore platforms

    Publication Year: 1990, Page(s):35 - 48
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (868 KB)

    The AC-supply voltage waveforms on offshore oil platforms can be heavily distorted during drilling operations. The harmonic and commutation distortion is caused by the drilling rectifiers which drive large DC motors. The authors examine a method of analysing these disturbances, especially the commutation spikes which appear on the high-voltage busbars (the point of common coupling) and are spread ... View full abstract»

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  • Operating characteristics of an unusual single-ended parallel-resonant convertor

    Publication Year: 1990, Page(s):25 - 34
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (656 KB)

    The operation of a class class-E-derived single-ended parallel-resonant convertor is examined both theoretically and practically. The convertor topology is produced from the electric-circuit dual of the class E convertor by the addition of a diode in antiparallel with the switching transistor. The resulting convertor exhibits zero-current-switching characteristics. A fundamental-frequency analysis... View full abstract»

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  • Factors governing the severity of prestriking transients in motor systems

    Publication Year: 1990, Page(s):14 - 24
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (820 KB)

    Computer studies have been carried out to examine what factors determine the severity of switch-closing transients in a cable-connected motor system supplied from a complex source. The studies were based on a single-phase system representation simulating first-pole-to-close conditions. Busbar lengths and configurations were found to be of fundamental importance in defining transient severity. Shor... View full abstract»

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  • Performance prediction of Laws's relay actuator

    Publication Year: 1990, Page(s):1 - 13
    Cited by:  Papers (23)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (972 KB)

    The authors present the results of an investigation into the Laws relay type of limited motion rotary servoactuator. Laws's prediction relations based on magnetic equivalent circuits of the actuator are examined, extended and presented in SI units. Quantitative comparisons between predictions and test results for a large actuator designed for an industrial application are discussed. Design aspects... View full abstract»

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  • Computer-based methods for induced-voltage calculations in AC railways

    Publication Year: 1990, Page(s):59 - 72
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1176 KB)

    Calculations of induced voltage in metallic lineside cables have traditionally been made using simple methods based upon the explicit solution of transmission line equations. These methods were developed about 40 years ago with an emphasis on lead-sheathed cables which were in continuous contact with the ground. The authors review the limitations of the classical approach and conclude that in-sect... View full abstract»

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