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Indexed by:会议论文

Date of Publication:2008-06-10

Included Journals:EI、Scopus

Page Number:518-521

Abstract:Triggered vacuum switch (TVS) is one of the important switch apparatuses in the fields of high-pulsed power system. Its working lifetime is due to trigger failure of the trigger pin, so the parameters of trigger source become the key of lifetime dilatation. A sample of field-breakdown TVS coated with nothing is fabricated, which has much longer lifetime than the TVS coated with trigger materials, but more trouble in the trigger process. A trigger system and a LC test circuit are designed to find the operational characteristics of the TVS sample. The trigger system generates a negative pulse with peak value of 30kV/500A, the system delay and its scatter is controlled in 70-100μs, and the triggered rate of success reaches 96%. Test results show that the sample has a wide working voltage range of 0.3-40kV. The delay of its switching-on is stable in hundreds of nanoseconds, which will be reduced with the increase of main gap voltage. The arcing is steady in the conducting process, keeping arc voltage at 20V approximately. The arc current drops to zero as current zero is approached, leading to a voltage remained in the capacitance. ©2008 IEEE.