Photoelectric Hybrid Current Sensor Combination of LPCT and FFI

Photoelectric Hybrid Current Sensor Combination of LPCT and FFI
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LPCT和FFI的光电混合电流传感器组合

DOI:
10.1109/lpt.2014.2359091
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发表时间:
2014-12
影响因子:
2.6
通讯作者:
Hongyan Zhao
Hongyan Zhao
中科院分区:
工程技术3区
文献类型:
--
作者:
Jianxiang Tian;Yunjie Xia;Dianguo Cao;Hongyan Zhao

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设计了一种新型光电混合式电流传感器。低功率电流互感器Transformer(LPCT)用作电流转换的初级传感器。光纤斐索干涉仪作为非接触式微振动检测的二次传感器。电动结构作为连接两个传感器的桥梁。采用频率响应分析和线性拟合两种不同的方法,得到了相似的灵敏度结果。当电流频率为50 Hz时,其被认为是3.5152 nm/A。在额定一次电流为450 A时,最大测量比误差<0.25%,最大相位差为0.066 rad。
A new kind of photoelectric hybrid current sensor is designed. The low-power current transformer (LPCT) is used as the primary sensor for current conversion. The optical fiber Fizeau interferometer acts as the secondary sensor for noncontact microvibration detection. An electro-dynamic structure works as a bridge connecting the two sensors. Using two different ways as frequency response analysis and linear fitting method, similar sensitivity results are obtained. It is considered to be 3.5152 nm/A when the current frequency is 50 Hz. When LPCT works at the rated primary current of 450 A, the maximum measurement ratio error and phase displacement are <;0.25% and 0.066 rad, respectively.
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