作　　者： ; ;

机构地区： 洛阳师范学院物理与电子信息学院

出　　处： 《测控技术》 2014年第3期136-139,共4页

摘　　要： 电流的精确测量和过载保护是跟踪雷达伺服系统设计的关键因素。首先,设计了伺服电机电压和电流测量电路,主要分析了电流采样电阻和放大电路。电流测量电路包括四端子的采样电阻、精密仪表放大器以及电压跟随器。实验结果表明该测量电路实现了较高的电压和电流测量精度。然后,分析了电流过载保护电路原理和相关计算。当电流过载时,它能产生断开方位电机脉冲信号和功放故障信号,满足雷达伺服系统的设计要求。 Accurate measurement and overload protection of current are the key factors in the design of a track ing radar servo system. Firstly, the voltage and current measurement circuits of a servo motor are designed. A current sampling resistor and an amplification circuit are analyzed mainly. The current measurement circuit in cludes four-terminals sampling resistor, a precision instrumentation amplifier and a voltage follower. The experi ment results show that the measurement circuits have higher voltage and current measurement accuracy. Moreo ver, the principle and correlation calculation of the current overload protection circuit are analyzed. When the current overload happens, it can produce a breaking motor pulse signal and a power amplifier fault signal to meet the design requirements of the radar servo system.

关 键 词： 伺服系统 电流采样电阻 过载保护 测量精度

领　　域： [自动化与计算机技术] [自动化与计算机技术]