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1. 发明申请

WO1990011529A1 APPARATUS AND METHOD FOR MEASURING ELECTRIC CURRENT IN CONDITIONS OF HIGH INTERFERENCE 审中-公开
标题翻译：用于在高干扰条件下测量电流的装置和方法
公开(公告)号：WO1990011529A1
公开(公告)日：1990-10-04
申请号：PCT/FI1990000076
申请日：1990-03-23
申请人： ABB STRÖMBERG KOJEET OY , SOLANTI, Petri , TENHUNEN, Hannu , KIISKINEN, Esko , SUUTARI, Jukka , SIIKONEN, Martti
发明人： ABB STRÖMBERG KOJEET OY
IPC分类号： G01R15/02
CPC分类号： G01R15/202
摘要： The present invention concerns an apparatus and method for measuring the electric current in current conductors (82) in conditions of high interference in order to control, for instance, an overcurrent trip relay. The apparatus comprises a Hall-effect sensor (81) placed very close to each current conductor (82) and a voltage-measuring element connected to each Hall sensor (81) so that the measurement signal from the element can be used for computing the current level. In accordance with the invention, each current conductor (82) is enclosed by an essentially U-shaped (84a), or alternatively, comb-shaped (84b) core opening toward the Hall sensor and enclosing said sensor, which core is fabricated of a ferromagnetic material capable of concentrating the magnetic flux and additionally operating as an interference filter. With the help of the invention electric current can be accurately measured in conditions of interference.
摘要翻译：本发明涉及一种用于在高干扰条件下测量电流导体（82）中的电流以便控制例如过电流跳闸继电器的装置和方法。该装置包括非常接近每个电流导体（82）的霍尔效应传感器（81）和连接到每个霍尔传感器（81）的电压测量元件，使得来自该元件的测量信号可用于计算电流水平。根据本发明，每个电流导体（82）被基本上为U形（84a）或者替代地，梳状（84b）的芯开口朝向霍尔传感器封闭，并封闭所述传感器，该芯由能够集中磁通量并另外作为干涉滤光器工作的铁磁材料。借助本发明，可以在干扰条件下精确地测量电流。

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