Abstract
Technical details about intermittent pulse rectifiers for large-capacity pulsed power supply have rarely been reported in the literature. In this paper, a new thyristor triggering scheme for this application is proposed. This proposed scheme adjusts gate trigger pulses according to the real-time variation of thyristor anode-to-cathode voltage to optimize the triggering performance. Accurate triggering is possible under big line voltage distortions and large frequency changes. Integrated real-time diagnostics can provide valuable information regarding thyristor triggering. The scheme can also prohibit unnecessary trigger pulses to reduce the gate power dissipation. Thus, gate trigger pulses can be designed with high amplitude to enhance the thyristor turn-on characteristics. The validity and superiority of the proposed scheme is verified through experiments. In actual operation, the scheme performs satisfactorily even under sudden load changes.
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