A well-known method for achieving free levitation of ferromagnetic objects depends on a suspension electromagnetic as the inductive part of a tuned circuit which enables static stability of the suspended object. Dynamic instability appears to be fundamentally inherent to the tuned-circuit system, and causes oscillations of the suspended object. A simplified and economic numerical simulation of tuned-circuit levitators has been obtained by employing the averaging method. The approximate system equations obtained by this method demonstrate the characteristic dynamic instability. A relatively simple analytical tool to deal with the instabilities of a complicated electromechanical system is obtained which may enable further improvements in the design of tuned-circuit levitators. One of the main problems encountered at present is the use of such levitators for heavy duties at mains frequencies.


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    Title :

    The inherent dynamic instability of levitators which employ tuned LCR circuits


    Additional title:

    Die spezifische dynamische Instabilitaet beim Schweben mit abgestimmten LCR-Schaltkreisen


    Contributors:


    Publication date :

    1978


    Size :

    10 Seiten, 15 Quellen


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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