Cho Chuhyun, Jin Yun-Sik
Korea Electrotechnology Research Institute, 12 Bulmosan-ro, 10 Beon-gil, Seongsan-gu, Changwon-si, Gyeongsangnam-do 51543, South Korea.
Rev Sci Instrum. 2018 Aug;89(8):084707. doi: 10.1063/1.5035467.
High-voltage, repetitive pulse generation technology plays a key role in underwater discharge applications such as water treatment and metal nanocolloid production. For these applications, a high-voltage, high-speed switching technology was crucial to swiftly transfer the energy stored in the capacitor to the electrodes in water. A rotary-triggered double spark gap switch was developed for this purpose in this study. Two spark gaps dedicated for charge and discharge were arranged in this switch, and they eliminated the irregular and unstable pulse generation due to the simultaneous charging and discharging in the pulse-generating circuits. Using this technique, pulses with 12 kV and 100 ns rise time were generated at a repetition rate of 150 pulses per second and applied to underwater discharge to produce silver nanocolloids.
高压、重复脉冲产生技术在诸如水处理和金属纳米胶体生产等水下放电应用中起着关键作用。对于这些应用，高压、高速开关技术对于迅速将存储在电容器中的能量传输到水中的电极至关重要。本研究为此开发了一种旋转触发式双火花隙开关。该开关中设置了两个分别用于充电和放电的火花隙，消除了脉冲产生电路中同时充电和放电所导致的不规则和不稳定脉冲产生。利用该技术，产生了上升时间为100 ns、电压为12 kV的脉冲，重复频率为每秒150个脉冲，并将其应用于水下放电以生产银纳米胶体。
