Pulse width lengthening technique for compact pulsed power generator

Abstract

Recent trends in the further development of pulsed power technology are towards higher power, longer duration and more compact structures. Compact pulsed power generators based on a Tesla transformer, configured using coaxial pulse forming lines, are widely used in the application of pulsed power systems. It is significant to lengthen pulse width of the pulsed power generator. In this paper, the high permittivity liquid dielectric and a spiral structure are adopted to lengthen the pulse width of a compact pulsed power generator. Firstly, the operation principles of the compact pulsed power generator are described. The techniques used to lengthen the pulse width are then presented and analyzed. Prior to its use, the propylene carbonate was purified by filtering to remove particles, de-ionizing, and de-gassing. The high voltage insulation was designed using insulation matching to ensure optimal distribution of the electromagnetic field. Finally, a compact pulsed power generator with longer output pulse duration was developed. For a generator length of 1 m, an output voltage of 100 kV was developed across a 10 Ω resistive load, with a pulse duration of 33 ns. This paper sets the foundations for the future development of compact pulsed power generators using propylene carbonate as an energy storage medium.