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    Improvement of AC electronmagnet performance

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    Main article (903.1Kb)
    Date
    1999
    Author
    Litchev, A.I.
    Yanev, K.M.
    Publisher
    University of Botswana
    Type
    Published Article
    Metadata
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    Abstract
    Electromagnets are essentials for the operation of relays, contactors and other electromagnetic apparatus and take part in driving control and protective circuits of industrial processes and power systems. Performance of each electromagnet affects the driving time and the stability of operation of such circuits. This paper examines the improvement of the performance of AC electromagnets by using two diodes. The theoritical analysis lead to expressions for calculating the maximum, average and minimum values of coil-currents. Due to the electromagnetic processes in the coil, the current becomes pulsating but unidirectional and better force-gap characteristics are achieved. Consideration are made for reduction of the mass ferromagnetic and copper materials in the electromagnets and for decreasing teh responding time.
    URI
    http://hdl.handle.net/10311/683
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    • Research articles (Dept of Electrical Engineering) [18]

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