激光触发变磁超导断路开关和功率脉冲电源

为了实现超导环境下电感储能的快速释放,设计了一种基于Meissner效应的激光触发变磁超导断路开关,基于该断路开关的电感式功率脉冲电源采用外置工频供电常温充电器,采用LCC逆变电路,省去中间的高频变压器,逆变输出直接整流对中间储能电容充电、再由电容向超导电感放电储能的拓扑结构。首先进行变磁超导断路开关的结构设计,说明其基于Meissner效应的工作原理及进行影响断路性能的因素分析。之后利用有限元分析的方法,对超导薄膜失超前后开关内磁场分布进行仿真分析,并动态地模拟了耦合电感次级所获得的脉冲电流输出。在给出整个电感式功率脉冲电源系统的电路结构并简单分析了LCC逆变充电器的工作原理和参数选择方法后,对用固态开关模拟超导开关断开脉冲变压器初级最大电流而得到次级高压脉冲输出的工作进行了仿真和实验分析。结果表明,按所选取的参数,电源可实现前沿1.0μs、幅值30kV、脉宽(90%幅值)1.5μs的高压脉冲输出,重复工作频率可>2.5kHz;也可实现前沿8ns、幅值4.8kA的电流脉冲电流输出,充电器不仅实现了对中间储能电容的快速充电,而且稳态工作时的损耗不超过输入供电的5%。

Optically Triggered Changing Flux Superconducting Switch and the Inductive Pulsed Power Supply

In order to realize the rapid release of superconducting magnetic energy storage,a laser-triggered flux superconducting opening switch based on Meissner effect was designed and the pulsed power supply of inductive energy storage was constructed based on the opening switch.Without the high-frequency transformer,the LCC inverter output was directly rectified and charged to the storage capacitor,and then the energy was transferred from the capacitor to the superconducting inductance.The structure of the superc...