Abstract
The operation of a thyristor switch triggered in the impact-ionization wave mode was investigated. The switch contained two series-connected Т253-800-24 thyristors of the tablet design with a semiconductor- structure diameter of 56 mm. When a triggering pulse is applied to the switch at a voltage rise rate dU/dt of more than 1 kV/ns, the transition time of the thyristors to the conducting state was shorter than 1 ns. It was shown that the maximum amplitude of the no-failure current increases with an increase in dU/dt at the triggering stage. The possible mechanism of the influence of the dU/dt value on the thyristor breakdown current is discussed. In the safe operating mode at dU/dt = 6 kV/ns (3 kV/ns per single thyristor), the switch discharged a storage capacitor with a capacitance of 1 mF, which was charged to a voltage of 5 kV, through a resistive load of 18 mΩ. The following results were obtained: the discharge-current amplitude was 200 kA, the initial current rise rate was 58 kA/μs, the pulse duration (FWHM) was 25 μs, and the switching efficiency of 0.97.
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Original Russian Text © A.I. Gusev, S.K. Lyubutin, S.N. Rukin, B.G. Slovikovsky, S.N. Tsyranov, 2017, published in Pribory i Tekhnika Eksperimenta, 2017, No. 4, pp. 95–101.
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Gusev, A.I., Lyubutin, S.K., Rukin, S.N. et al. High-current pulse switching by thyristors triggered in the impact-ionization wave mode. Instrum Exp Tech 60, 545–550 (2017). https://doi.org/10.1134/S0020441217030204
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DOI: https://doi.org/10.1134/S0020441217030204