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A Repetitive Solid State Marx-Type Pulsed Power Generator Using Multistage Switch-Capacitor Cells | IEEE Journals & Magazine | IEEE Xplore

A Repetitive Solid State Marx-Type Pulsed Power Generator Using Multistage Switch-Capacitor Cells


Abstract:

This paper reports on the novel development of a fully solid state Marx-type circuit to achieve output voltage pulses with adjustable voltage levels, pulse width, and fre...Show More

Abstract:

This paper reports on the novel development of a fully solid state Marx-type circuit to achieve output voltage pulses with adjustable voltage levels, pulse width, and frequency using a series connection of half-bridge or full-bridge switch-capacitor cells (SCC). Modularity of the circuit allows independent control of each SCC, resulting in more freedom to control the pulsed power parameters. A 3-kW laboratory prototype of the proposed generator topology was implemented using 1700-V insulated gate bipolar transistors (IGBTs) and a 1-kV power supply. The SCC unit circuit board is stacked to increase the maximum output voltage. The control unit for the output pulse parameters was performed using an field-programmable gate array unit.
Published in: IEEE Transactions on Plasma Science ( Volume: 40, Issue: 10, October 2012)
Page(s): 2316 - 2321
Date of Publication: 16 April 2012

ISSN Information:


I. Introduction

Repetitive high-voltage pulse generators have found extensive use in industrial and medical applications [1]–[3]. Switching devices are the key components in pulsed power systems. A number of techniques have been used to generate repetitive high-voltage pulses with optimized performance and characteristics by taking advantage of solid-state technology, which offers characteristics such as high operational frequency rate, reduced costs and losses, and a smaller footprint. A limitation of semiconductor switches is the blocking voltage; to overcome this, the use of either a series connection of switches or a step-up transformer has been proposed in different configurations [4], [5]. The former presents the risk of voltage breakdown of the switches due to lack of proper balancing and protection circuits; the latter causes a dramatic decrease in system efficiency due to transformer losses, size, and difficulties matching load impedance.

References

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