感性绕组直流电阻快速测试仪的研制

Development of Rapid Inductive Coils of the Directcurrent Resistances Measurement

提出了一种动态测量感性绕组直流电阻的新方法,该方法通过采样被测绕组充电过程中电压、电流信号,借助于V/V、I/V转换、自动程控放大器A1,A2、采样保持器S/H、多路切换开关MPX、模数转换器A/D、单片机等器件,实现了快速测量感性绕组直流电阻的目的。该法对测试电路电源、外串电阻要求不高且不需要预先测量被测绕组的电感量,一次即可完成直流电阻的测量。直流电阻表达式中,不含微分项,简化了要求,从而易实现,易编程,有较高的精度。组成的测量装置表明方法是可行的。

This paper put forward a new way of dynamic measurement system of the directeurrent resistances of inductive coils. That is, by means of , conversion, automatic program controlled amplifer, sampling holder S/H, Multi - Way Switching Device MPX, analog - to - digital converter A/D, MCU and other parts, the charging voltage and current signal of tested coils were measured. A rapid measurement of the directcurrent resistances of inductive coils was realized. DC resistance measurement can be completed one -time, when it does not present a high demand about power supply circuit, and inductance value measured preliminarily. There is no differential term in the direetcurrent resistances expresssion, it can simplify the requirements, it has the advantages of easily realize, program and with high precision. The result showed that the measuring device is feasible.