Triggered switches for high repetition rate commutation of capacitive stores

Bublik, N.P.; Isaenkov, Yu. I.; Kuleshov, G.D.; Makeev, P.G.

doi:10.1109/20.911839

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“…This potential is caused by an oscillatory process in the circuit G,, Cy2 ,L,, C,, which occurred at the instant of a diode D closing. L, is a stray inductance of a discharge ciIcuit, L, <c L, ; R, is a load resistance [2]. The pulse repetition rate is adjusted by variation of a space between the pulses controlling the operation of the switch K.…”

Section: Methodsmentioning

confidence: 99%

Triggered spark gap switches and their erosion characteristics

Isaenkov¹,

Bublik²,

Makeev³

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.

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This paper contains the results of experimental study of the process of commutation of a capacitive storage on a resistive load by a triggered spark gap switch with hollow electrodes and air blowing of interelectrode gaps, and the erosion characteristics of the electrodes. Such switch can be used as a base unit in developing of pulse-frequency generators for scientific purposes and for a number of technical applications, e.g., generators for forming a streamer discharge in plasma-chemical reactors [I]. The research was performed for the following range of parameters: long-time average transmitted power, up to 20 kW; switched energy, 1 to IO J per pulse; pulse power, 30 to SO M W voltage rise rate on the load, 2.1 8 kVis;pulse repetition rate, up to 4.5 kHz; electric power for creation of an airflow for conditioning of interelectrode gaps and electrodes cooling, 200 to 800 W. EXPERIMENTAL SETUPThe electric circuit diagram of a experimental setup is given in Fig. 1 . Dc VOLTAGE 0 -15 kV Figure 1. Circuit diagram of experimental setup As a key K an electronic switch is used made np on the basis of IGBT transistors. This key initiates a transient process of resonance charging of a capacitor C, by a capacitor c,. After completion of the charging process, the spark gap switch S is triggered by a sharp change of potential of a switch mediate electrode. This potential is caused by an oscillatory process in the circuit G,, Cy2 ,L,, C,, which occurred at the instant of a diode D closing. L, is a stray inductance of a discharge ciIcuit, L,

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Section: Methodsmentioning

confidence: 99%