CAJ | 학술논문

首先介绍了目前用于电流有效值转换的方法，分析了每种方法的特点，并以AD637芯片为核心搭建了典型应用电路，通过输入方波信号，发现其输出纹波含量较高，输出结果含有较大误差。在AD637典型应用电路的基础上搭建了基于Sallen-Key滤波电路的非标准正弦电流有效值转换电路，并通过优化滤波电路的参数，使得输出纹波含量降低为典型应用电路的10%以下，提高了非标准正弦电流信号有效值转换的精度。
수선개소료목전용우전류유효치전환적방법，분석료매충방법적특점，병이AD637심편위핵심탑건료전형응용전로，통과수입방파신호，발현기수출문파함량교고，수출결과함유교대오차。재AD637전형응용전로적기출상탑건료기우Sallen-Key려파전로적비표준정현전류유효치전환전로，병통과우화려파전로적삼수，사득수출문파함량강저위전형응용전로적10%이하，제고료비표준정현전류신호유효치전환적정도。
The article first introduces the methods currently used for the current rms conversion, analyses of the characteristics of each method and sets up a typical application circuit with AD637 chip,as a core. By analysing the entering the Rectangular wave signal,the higher levels of output ripple are found,and the output contains a large error. Based on the AD637 typical application circuit, a Sallen-Key filter circuit-based nonstandard sinusoidal current RMS conversion circuit was set up,and by optimizing the parameters of the filter circuit,the output ripple decreases less than 1% of the typical application circuit to improve nonstandard sinusoidal current signal RMS conversion accuracy.