Theoretical and Experimental Evaluation of Equivalent Initial Inductance and Resistance of Helical Flux Compression Generators and their Dependence on Frequency Using 2-D Filamentary Meth

Document Type : Original Article

Abstract

This  paper  presents  an  approach  to  calculate  the  initial  equivalent  inductance  and  resistance  of  helical  flux     
compression  generators  and  their    dependence  on  frequency  accurately.  This  approach  is  based  on  the            
2-D filamentary method in frequency domain. By using this method, it is possible   to consider both the effects of the
armature presence and frequency on the inductance and resistance of helical flux compression generators. In order to
consider the eddy current effects on the equivalent resistance and inductance of the helical coil, we introduce an eddy
current coefficient using the filamentary method. The  calculation results show that the presence of the armature not
only  decreases  the  equivalent  inductance  of  the  HFCG, but  also  increases  its  equivalent resistance.  The  latter  effect
has  not  been  discussed  previously  in  the  open  literature.  To  verify  our  derived  equations,  a  small  scale  HFCG  was
built  and  its  inductance,  resistance  and  impedance were  measured  at  different  frequencies.  It  is  shown that  the       
calculation results demonstrate a good agreement with measurement results.

Keywords


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  • Receive Date: 17 February 2016
  • Revise Date: 06 March 2019
  • Accept Date: 19 September 2018
  • Publish Date: 23 October 2014