10 Hz~500 kHz差分式阻容分压器的研制与验证  

Development and Validation of Differential Resistive-Capacitive Voltage Divider from 10 Hz to 500 kHz

作　　者：陈志雄[1] 刘琼芳 CHEN Zhixiong;LIU Qiongfang(The 5th Electronics Research Institute of the Ministry of Industry and Information Technology of China,Guangzhou 511370,China)

机构地区：[1]工业和信息化部电子第五研究所,广东广州511370

出　　处：《自动化仪表》2025年第4期112-116,126,共6页Process Automation Instrumentation

基　　金：海军装备部科研基金资助项目(HJZB-2021013-SJ002)。

摘　　要：为消除水声测试系统中高频共模电压的影响,设计并实现了一种宽频5 kV差分式阻容分压器。创新性地提出了分压器的差分输入架构方案,并分析了制约阻容分压器测量精度的因素。通过对精密电阻器和电容器元件进行参数匹配,采用隔离杂散电容的有源驱动技术,并对整机进行高频响应的匹配调整,从而使分压器样机在10 Hz~500 kHz内具备了良好的低频响应、高频响应和共模抑制性能。校准测试表明,采用该方案的分压器样机在100 Hz下的分压比基本误差优于±0.2%、10 Hz~500 kHz下的频响特性和共模抑制比均达到设计目标要求,从而验证了差分式阻容分压方案的正确性与有效性。该差分式阻容分压器解决了水声换能器发射电压的高精度测量难题。To eliminate the influence of high-frequency common mode voltage in underwater acoustic testing systems,a wideband 5 kV differential resistive-capacitive voltage divider is designed and implemented.A differential input architecture scheme for voltage dividers is innovatively proposed and the factors that constrain the measurement accuracy of resistive-capacitive voltage dividers are analyzed.By matching the parameters of the precision resistor and capacitor components,adopting the active drive technology with isolated stray capacitors,and matching and adjusting the high-frequency response of the whole machine,the voltage divider prototype has good low-frequency response,high-frequency response,and common-mode rejection performance within 10 Hz~500 kHz.The calibration test shows that the voltage divider prototype adopts this scheme,the basic error of voltage division ratio is better than±0.2%at 100 Hz,and the frequency response characteristics and common mode rejection ratio at 10 Hz~500 kHz both reach the design target demand,which verifies the correctness and validity of the differential resistivecapacitive voltage divider scheme.The differential resistive-capacitive voltage divider solves the problem of high-precision measurement of hydroacoustic transducer emission voltage.

关 键 词：阻容分压 差分输入 杂散电感 高频电流 共模电压 共模抑制 

分 类 号：TH-71[机械工程]