CAJ | 학술논문

在核聚变实验中，积分器是还原磁探针微分信号的基本手段。传统的模拟积分器为单端输入积分器，无共模抑制能力。本文设计了一种差分积分器，采用与标准差分放大器类似的结构，实现了差分输入积分；进而分析了差分积分器对差分信号积分和对共模信号抑制的工作原理，设计了调节积分漂移的电路，有效抑制了差分积分器的积分漂移。测试结果表明，该差分积分器积分正确，积分漂移稳定且易于调节，在共模电压为1.5 V时，100 s积分漂移为80μW b ，共模抑制比高达125 dB ，效果明显优于单端积分器。该差分积分器已成功应用于2012年EAST实验中单匝环信号的相对测量。
재핵취변실험중，적분기시환원자탐침미분신호적기본수단。전통적모의적분기위단단수입적분기，무공모억제능력。본문설계료일충차분적분기，채용여표준차분방대기유사적결구，실현료차분수입적분；진이분석료차분적분기대차분신호적분화대공모신호억제적공작원리，설계료조절적분표이적전로，유효억제료차분적분기적적분표이。측시결과표명，해차분적분기적분정학，적분표이은정차역우조절，재공모전압위1.5 V시，100 s적분표이위80μW b ，공모억제비고체125 dB ，효과명현우우단단적분기。해차분적분기이성공응용우2012년EAST실험중단잡배신호적상대측량。
In fusion experiments ,the integrators are fundamental instruments to recover differential signals from magnetic probes .The conventional analog integrators are sin-gle-ended input , w hich have low common mode rejection ratio (CM RR ) . A kind of difference integrator was developed which has the same structure as the standard differ-ence amplifier in this paper .The principles of the integration for difference input signal and rejection for common mode signal were analyzed .A zeroing circuit was designed to reduce the integration drift .The test results show that this kind of difference integrator works well with stable and adjustable integration drift ,when the common voltage is 1.5 V ,its integration drift in 100 s is 80 μWb ,and its CMRR is up to 125 dB ,which is much better than single-ended integrator .The difference integrators were successfully used for flux loop measurement with the anti-series connection in 2012 Experimental Advanced Superconducting Tokamak (EAST ) campaign .