Rogowski线圈信号电阻对纳秒级脉冲大电流的响应  

Sampling resistor's response of Rogowski coil to ns-grade high pulse current

作　　者：张瑜[1] 刘金亮[1] 文建春[1] 殷毅[1] 冯加怀[1] 梁波[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《强激光与粒子束》2009年第10期1583-1588,共6页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目;国家自然科学基金项目(10675168)

摘　　要：研制了一种自积分型Rogowski线圈,从电路理论和电路仿真角度分析了信号电阻的寄生电感和线圈对地电容对测量信号的影响。采用电阻并联的方法,制作了小电感信号电阻。在定标和大电流测量实验中,小电感信号电阻的使用,消除了测量信号的平顶振荡和波形畸变,验证了理论分析的正确性。经定标,采用小电感信号电阻的Rogowski线圈对方波脉冲前沿的响应为11 ns,灵敏度为4.25 mV.A-1。该线圈性能稳定,已用于测量长脉冲强流电子束加速器二极管的电流,测得的电流波型平顶较好,半高脉宽为180 ns,幅度约为15.36 kA。A kind of self-integrated Rogowski coil is designed. Through circuit theory and simulation analyses, the impacts on the measured signal, which are caused by the sampling resistor＇s residual inductance and the coil＇s ground capacitance, have been studied. By shunt-wound method, we have made and calibrated a low-inductance sampling resistor. In the calibration and measure experiments, oscillation and deformation of the measured signal were eliminated resistor. And the theoretical analyses are supported by the experiments. The Rogowski coil＇s responding time to square pulse signal is 11 ns, and its sensitivity is 4.25 mV/A. For its good stability, we use the coil to measure the current of the diode of the long-pulsed intense electron beam accelerator and get the current waveform with flat-top oscillation effectively restrained. The half-height full-width of the current pulse is 180 ns, and the amplitude is about 15 kA.

关 键 词：ROGOWSKI线圈 信号电阻 寄生电感 对地电容 定标 灵敏度 

分 类 号：TM835.2[电气工程—高电压与绝缘技术]