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什么是交流电压变送器?基本原理是什么?

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报价18

发布时间2019-08-13

产品描述:交流电压变送器可将正弦或畸形交流电压转换成独立于负载且与测量值成比例的直流电流或直流电压信号,符合电磁兼容emc和安全性的所有技术要求和规范。

产品概述

交流电压变送器可将正弦或畸形交流电压转换成独立于负载且与测量值成比例的直流电流或直流电压信号,符合电磁兼容emc和安全性的所有技术要求和规范。

基本原理
交流电压变送器是由电压互感器、精密整流滤波、及vi转换电路所组成。电压互感器把0v~100v的交流电压变为所需要的交流电压信号。精密整流电路把交流电压信号放大并整流为相对稳定直流电电压。之后,vi转换器又将稳定的直流电压信号转变为恒定成比例的电流输出。最终目的是将有效值为0v~100v交流电转换为4ma~20ma直流电流输出(≤200Ω负载)。

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