高压隔离采集电路的设计

Design of high voltage isolation acquisition circuit

分析了霍尔电压传感器在高压隔离采集中的使用方法、工作原理、设计参数的计算以及运算放大器的选用原则。该方案可应用在直流高压采集和交流高压采集场合,考虑在恶劣环境中使用的稳定性和可靠性,在电路设计中增加了调零电路和补偿电路,可将误差降到最小,以保证精度的要求,并能根据使用场合的不同,按需要取舍。

The concrete method,work principle,calculation of the involved parameters,principles of the selection of operational amplifier of hall voltage sensors in high voltage isolation are analyzed in this paper.The design scheme can be applied in the occasion of DC high voltage sampling and AC high voltage.Considering the stability and reliability in poor environment,the zero adjustment circuit and compensation circuit is added in the circuit design,and the error is reduced to the minimum in order to ensure the accuracy requirements on different occasions,and according to different needs.