CAJ | 학술논문

对于分辨率优于0.25 nm的200 kV级透射电子显微镜，要求配备稳定度优于2×10?6/min的高压电源，这是高稳定度输出的重要保证。C?W电路是高压发生的核心部分，其传递函数是高压电源闭环系统中不可或缺的环节之一。由于C?W电路采用级联的整流二极管?电容网络拓扑，受二极管器件本身非线性效应的影响，常规传递函数的求解方法已不符合其非线性的特点。通过研究平衡式C?W电路的原理，结合其物理特征将系统非线性处理为离散时间下的线性系统，建立了离散时间状态空间模型，进行 z变换后推导了三阶平衡式C?W脉冲传递函数通式。应用Matlab仿真一款平衡式C?W电路的幅频特性曲线和相频特性曲线，进一步分析了其频率特性，为平衡式C?W电路系统特性的研究提供了一种理论方法。
대우분변솔우우0.25 nm적200 kV급투사전자현미경，요구배비은정도우우2×10?6/min적고압전원，저시고은정도수출적중요보증。C?W전로시고압발생적핵심부분，기전체함수시고압전원폐배계통중불가혹결적배절지일。유우C?W전로채용급련적정류이겁관?전용망락탁복，수이겁관기건본신비선성효응적영향，상규전체함수적구해방법이불부합기비선성적특점。통과연구평형식C?W전로적원리，결합기물리특정장계통비선성처리위리산시간하적선성계통，건립료리산시간상태공간모형，진행 z변환후추도료삼계평형식C?W맥충전체함수통식。응용Matlab방진일관평형식C?W전로적폭빈특성곡선화상빈특성곡선，진일보분석료기빈솔특성，위평형식C?W전로계통특성적연구제공료일충이론방법。
Since the C?W circuit adopts the cascaded rectifier diode?capacitance network topology,and is affected by non?linear effect of diode devices,the conventional methods for deriving the transfer function are no longer consistent with its non?linear characteristics. By researching the principle of the balanced C?W circuit,the nonlinear system is turned into a linear system un?der the condition of discrete?time in combination with physical characteristics of C?W circuits,and discrete time state space model is built. The pulse transfer formula for a third?order balanced C?W circuits is derived according to z?transform. The characteristic curves of amplitude?frequency and phase?frequency for a balanced C?W circuit prototype are simulated with Matlab software. Its frequency characteristics are also analyzes,which provide a theoretical approach for study on characteristics of the balanced C?W circuit system.