122 / 2024-04-13 21:11:18

A novel high-capacity fast vacuum switch with precise closing control

triggered vacuum gap,fast mechanical switch,conduction control,current transfer circuit breaker,pulsed power technology

To achieve precise conduction control and low on-state resistance, a high-capacity and precise-closing fast vacuum switch based on triggered vacuum gap is proposed, which can be triggered into conduction during the closing process of the moving electrode. This paper analyses the physical process of vacuum gap triggering and studies the effects of trigger polarity and electrodes arrangement on delay time dispersion. Experimental results demonstrate that this approach offers high triggering stability, with a current switching-on time dispersion in the microsecond range and a stable on-state resistance in the micro-ohm range. Compared to conventional trigger vacuum gap and power electronic device, it presents significant advantages including low cost, high current capacity and high reliability, providing a more efficient solution for pulsed power release such as current transfer in circuit breakers.