新型非介入式直流电流传感器SS491B的原理与应用

Principle and Applications of Non-Intrusive Hall Current Sensor SS491B

现有的通过取样电阻测直流电流值的方法的主要不足是破坏原电路,安装不便。论文介绍了一种非介入式直流电流传感器SS491B,分析了该传感器在测量电流时误差的主要来源,并提出了相应的解决方案。给出了其在基于无线的汽车电流检测装置中的应用。实验结果表明,SS491B输出线性度高,测量精确,能够满足汽车电子领域的应用要求。

The faults of ultrasonic non intrusive current testing methods in existence are the spoil of the original circuit and the inconvenience of installation. In this paper, the author presents Honeywell＇s low cost sensor-SS491B for measuring direct current. The principle of SS491B is introduced. The author also analyzed where the error comes as applies the sensor for DC measurements and gives the correspond resolution. An application of wireless in car current detect instrument is revealed. The results show that SS491B fits the desire of auto electronics.