基于错频法的介质损耗测试研究  

Research about Dielectric Loss Detector Based on Frequencyconversion Method

作　　者：郭华[1] 申忠如[1] 

机构地区：[1]西安交通大学城市学院,陕西西安710018

出　　处：《电子测试》2016年第11期42-44,共3页Electronic Test

摘　　要：采用错频法可将同频干扰的问题转变为对异频干扰的滤除;在本测试系统中,选用微处理器外置DAC的方法产生准确的激励电源,并进行程序再校验,避免了输入信号相位漂移产生的误差;利用同步分离法将待测的试品(电阻电容串联等效)的实部和虚部分离,经A/D转换器送入微处理器计算介质损耗因数。测试结果表明,该系统工作稳定,介质损耗因数的绝对误差小于0.01%。Adoptingfrequency-conversion method, the same frequency interference problemturned into filter for different frequency interference.In this measurement system, accurate test power-source gained by microprocessor external DAC and routine check, to avoid error of the input signal phase drift.According to the synchro separation method, the test item utilizing capacitance and resistance to simulate as dielectric loss measurement sample divided into real and imaginary part.A/D converter sent data to microprocessor to calculate dielectric loss factor. Test results show that the system working stability,the absolute error of dielectric factor less than 0.01%.

关 键 词：介质损耗因数 错频法 同步分离法 滤波 

分 类 号：TM934.32[电气工程—电力电子与电力传动]