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Compact modulator using inductive energy storage and a solid state opening switch

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3 Author(s)
Dickens, J.C. ; Dept. of Electr. Eng., Texas Tech. Univ., Lubbock, TX, USA ; Bridges, J. ; Kristiansen, M.

A compact modulator system using inductive energy storage and a diode as an opening switch was investigated. The system was designed around a Russian diode that has characteristics similar to those of a step-recovery diode except that the reverse current density is 10-100 times larger than in US manufactured diodes. The main goal of this investigation was to characterize the Russian diode and develop an understanding of its operation for possible improvement and integration into nanosecond pulse generators. The basic modulator circuit designed uses IGBTs in the forward pumping circuit and is capable of delivering 5 kV at 400 A into the diode. Using this forward pumping circuit, diode voltage and current measurements were made at several input power levels. In addition, data obtained using this test stand was used to produce a computer simulation model of the diode for a more thorough circuit analysis

Published in:

Power Modulator Symposium, 1996., Twenty-Second International

Date of Conference:

25-27 Jun 1996