WBV/I121高速宽带跟踪型电量隔离传感器原理及其应用

The Principium of WB V/I 121 Electrical Isolation Sensor with High-Speed Wide Band Track and Its Application

WBV/I 121高速宽带跟踪型电量隔离传感器,是针对高压、大电流等强电,或负载能力很差的弱电,或幅值很小的信号,为克服其干扰、不宜直接与系统连接而设计的,分电压隔离或电流隔离2类。其工作原理是:当电压(电流)输入信号送至输入电路后,被转换成标准电压,并赋予较强的驱动能力;光电隔离电路实现输入信号的线性变换及隔离处理;输出电路将信号放大,输出具有较强驱动能力的标准电压以跟踪输入信号。传感器内部还配备了DC/DC转换器,从辅助电源+E提取能量供输入电路使用。并提供了传感器输出端接至后续设备的高速A/D等电路,信号由计算机等控制采样、处理,以及相应传递函数的应用示例。

Aiming at the high voltage, strong current, weak-over-load feeble sign, small-amplitude sign, overcoming the system disturb, WBV/I121 electrical isolation with high-speed wide band track sensor is designed. The sensor is divided into current isolation and voltage isolation two classes. The working principium is: the voltage (current) sign is sent to the input circuit, it is transformed to standard voltage (current) sign, and has powerful drive power. The linear transform of the input sign and isolation processing is achieved in photoelectric isolation circuit. The output circuit magnifies the sign and outputs the standard sign or track sign. The sensor that has DC/DC transformer supplies power that is obtained from additional electrical source to the input circuit. The join circuit between the output port of sensor and the high-speed A/D interface, the sign sampling and sign processing with computer, and the application example for correlative transfer function are presented.