In this study of arcing phenomena in transitioned solid armatures it is proposed that following forward acceleration of the arc plasma, re-strikes occur towards the rear of the contact surface resulting in commutation of current to the re-strike arcs. Thus a repetitive sequence of current conduction is predicted at a frequency dependent on the arc transit time along the armature surface. An analytical solution of the proposed theoretical model for the arcing phase evaluates the transient rail/armature gap voltages due to arc voltage, rail and armature resistances and magnetic flux changes. Comparison of the predicted rail/armature gap voltages at the front of the armature with measured muzzle voltage waveforms for a typical 90 mm armature shows sufficiently close agreement to support the validity of the theoretical model. The additional resistive losses as a result of transition are estimated to be >30% of the exit kinetic energy of 10 MJ. The deposition of most of this as thermal energy in the rail/armature gaps is expected to have a significant impact on structural design requirements


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Arcing phenomena in transitioned solid armatures


    Additional title:

    Lichtbogenbildungserscheinungen in übertragenen massiven Armaturen


    Contributors:
    James, T.E. (author)


    Publication date :

    1997


    Size :

    6 Seiten, 14 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Military radar transitioned using commercial technology

    Bayma, R. W. / Trujillo, E. / ERA Technology | British Library Conference Proceedings | 1997


    Non-steady phenomena in railgun plasma armatures

    Jamison, K.A. / Burden, H.S. / Powell, J.D. et al. | Tema Archive | 1986


    Development of transitioned vertical curve I Properties

    Easa, Said M. | Online Contents | 2000


    Optimum contact region geometry of solid armatures

    James, T.E. / James, D.C. | Tema Archive | 1997