Page 65 - 《含能材料》火工品技术合集 2015~2019

基 于 MOS 控 制 晶 闸 管 的 高 压 电 容 放 电 特 性 425

Characterization of High⁃Voltage Capacitor Discharge Unit Based on MOS Controlled Thyristor

QIN Xin，ZHU Peng，XU Cong，YANG Zhi，ZHANG Qiu，SHEN Rui⁃qi
（School of Chemical Engineering ，Nanjing University of Science and Technology ，Nanjing 210094，China）
Abstract：A capacitor discharge unit（CDU），consisting of domestic Metal‑Oxide‑Semiconductor（MOS） controlled thyristor
（MCT）and high‑voltage ceramic capacitor，was designed and prepared in order to study the discharge characteristics of CDU.
The volume of the CDU is 40 mm（L）×25 mm（W）×8 mm（H）. The CDU circuit inductance is about 10 nH，and the resistance is
about 100 mΩ. The R‑L‑C zero input response equation of CDU circuit was analyzed，and was verified by the experiment of
short‑circuit discharge of CDU load. It is found that the key parameters of CDU，such as the peak current，rise time of peak cur‑
rent and discharge time of high‑voltage capacitor all increase with the increase in capacitance value；the peak current increases
with the increase of discharge voltage，and the peak current rise time remains constant. The function efficiency of CDU was veri‑
fied by micro‑chip exploding foil initiator（Cu bridge foil 35 mΩ）and boron‑potassium nitrate pellet（B/1.50 μm，pressing densi‑
-3
ty/1.57 g·cm ），under the condition of 0.36 μF/1.20 kV，the measured peak current of circuit is 2.032 kA，the voltage at both
ends of the bridge foil is 0.9273 kV，the delay time between peak current and voltage is 32.4 ns，the burst time is 168.2 ns，and
the burst point power is 1.490 MW，and the CDU can reliably ignite BPN pellet by flyer impact. Results show that the CDU
based on the domestic MCT and high voltage ceramic capacitors is basically suitable for high‑current pulsed initiating devices
such as exploding foil initiator，but its comprehensive performance still needs to be improved.
Key words：Metal‑Oxide‑Semiconductor（MOS） controlled thyristor；capacitor discharge unit；exploding foil initiator；boron‑
potassium nitrate pellet
CLC number：TJ45 Document code：A DOI：10.11943/CJEM2018147
（责编：王艳秀）

CHINESE JOURNAL OF ENERGETIC MATERIALS 含能材料 2019 年 第 27 卷 第 5 期 （417-425）