小回线大电感负载快关断高重频功率放大器设计  

Design of high repetition frequency power amplifier with small loop and large inductance load

作　　者：徐晨磊 秦涛涛 卞雷祥[1] 何勇[1] 王冲 徐展 胡杰 XU Chenlei;QIN Taotao;BIAN Leixiang;HE yong;WANG Chong;XU Zhan;HU Jie(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]南京理工大学瞬态物理国家重点实验室,南京210094

出　　处：《自动化与仪器仪表》2024年第3期12-17,共6页Automation & Instrumentation

基　　金：国家自然科学基金(61973165)资助项目。

摘　　要：针对瞬变电磁法探测中,功率放大器负载大电感线圈面临关断时间长、充电-放电频率低的问题,本文开展小回线大电感负载瞬变电磁发射系统快速关断与快速充放电技术研究。利用大功率TVS串联的无源恒压钳位技术降低关断时间、同时采用阻尼吸收电阻减小关断振荡,设计了大功率恒压快速充电模式,推导了关断时间与TVS管个数的关系,关断时间随TVS管个数增加而缩短。仿真与实验测试结果表明:对于575μH负载电感,输出峰值电流230 A、2 ms脉冲时的充电时间为72 ms,9个TVS管时关断时间为152μs。为瞬变电磁探测系统减小探测盲区、多脉冲积累提高探测能力奠定了基础。In order to solve the problems of long turn-off time and low charge-discharge frequency in the detection of transient electromagnetic method,this paper studies the fast turn-off and fast charge-discharge technology of transient electromagnetic emission system with small loop and large inductance load.Using passive constant voltage clamp technology of high power TVS in series to reduce turn-off time and damping absorption resistance to reduce turn-off oscillation,a high power constant voltage fast charging mode was designed,and the relationship between turn-off time and the number of TVS tubes was deduced.The simulation and experimental results show that for the 575μH load inductor,the peak output current is 230 A,the charging time at 2 ms pulse is 72 ms,and the turn-off time at 9 TVS tubes is 152μs.It lays a foundation for the transient electromagnetic detection system to reduce the detection blind area and improve the detection ability by multi-pulse accumulation.

关 键 词：瞬变电磁探测 关断电路 大功率 快速关断 无源钳位 小回线 

分 类 号：TH763[机械工程—仪器科学与技术]