公开(公告)号：EP2665071A1

公开(公告)日：2013-11-20

申请号：EP11855603.4

申请日：2011-09-15

申请人： Noark Electrics (Shanghai) Co., Ltd.

发明人： HU, Yinglong ,  XU, Zeliang

IPC分类号： H01F38/28 ,  H01F27/24 ,  H01F41/02

CPC分类号： H01F27/24 ,  H01F3/12 ,  H01F38/30

摘要： A current transformer supplying a power for an electronic controller comprises two independent core magnetic circuits, wherein a first core magnetic circuit is a closed loop formed by connecting a U-shaped core and a linear core, a primary conductor extends through the closed loop, and a secondary winding for power supply is wound on the linear core; a second core magnetic circuit having an opening shape is disposed in parallel to the linear core of the first core magnetic circuit, and the open end of the second core magnetic circuit is coupled to the first core magnetic circuit through air gaps. The area of the cross section of the linear core is less than that of the cross section of the U-shaped core, so that the linear core can be magnetically saturated earlier than the U-shaped core. The centerline length of the U-shaped core is 1.5 to 4 times of that of the linear core. The current transformer of the present invention can not only normally start and work in case that a primary current is far lower than a rated current In, but also achieve the purpose of inhibiting rapid increase of an output current of the secondary windings and smoothing the output current in case that the primary current is far more than the rated current In.

摘要翻译： 为电子控制器提供电力的电流互感器包括两个独立的核心磁路，其中第一磁芯磁路是通过连接U形磁芯和线性磁芯而形成的闭环，主导体延伸穿过闭环，以及 用于电源的次级绕组缠绕在线性芯上; 具有开口形状的第二磁芯磁路平行于第一磁芯磁路的线性磁芯设置，第二磁芯磁路的开口端通过气隙与第一磁芯磁路耦合。 直线芯的横截面面积小于U形芯的横截面面积，因此线性芯可以比U型芯早期磁饱和。 U形芯的中心线长度为线芯的1.5〜4倍。 本发明的电流互感器不仅能够在初级电流远小于额定电流In的情况下正常启动和工作，而且还达到抑制次级绕组的输出电流的快速增加和平滑输出的目的 初级电流远大于额定电流In时的电流。