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1. 发明申请

US20110006779A1 FLUX-GATE LEAKAGE CURRENT SENSOR 审中-公开
标题翻译：漏电流漏电流传感器
公开(公告)号：US20110006779A1
公开(公告)日：2011-01-13
申请号：US12831302
申请日：2010-07-07
申请人： Masakazu KOBAYASHI , Konghui Yu
发明人： Masakazu KOBAYASHI , Konghui Yu
IPC分类号： G01R31/02
CPC分类号： G01R15/185 , G01R31/025 , G01R33/04
摘要： A flux-gate leakage current sensor includes: an annular core; a coil wound around the core; a driving circuit which applies to the coil a voltage with a positive/negative symmetric rectangular wave so as to saturate a density of a magnetic flux of the coil while reversing a direction of the magnetic flux; a comparator circuit which compares a measured voltage changing according to a coil current flowing in the coil with a positive-side reference voltage and a negative-side reference voltage that are positive/negative symmetric to each other, and outputs a positive-side electric signal corresponding to a period in which the measured voltage is higher than the positive-side reference voltage and a negative-side electric signal corresponding to a period in which the measured voltage is lower than the negative-side reference voltage; and a determination circuit which compares the positive-side electric signal and the negative-side electric signal output from the comparator circuit.
摘要翻译：磁通门漏电流传感器包括：环形磁芯; 缠绕在芯上的线圈; 驱动电路，其对线圈施加正/负对称矩形波的电压，以使线圈的方向反转来饱和线圈的磁通密度; 比较电路，其将根据线圈中流过的线圈电流的测量电压与正/负对称的正侧基准电压和负侧基准电压进行比较，并输出正侧电信号对应于测量电压高于正侧参考电压的时段和对应于测量电压低于负侧参考电压的周期的负侧电信号; 以及比较从比较电路输出的正侧电信号和负侧电信号的判定电路。

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