Design method and realization of a closed Rogowski coil for anti-magnetic field interference monolithic pcb

Abstract

The invention provides a designing method and achievement for a single PCB closed rogowski coil resisting magnetic field interference. The single PCB closed rogowski coil is formed by connecting a first coil and a second coil in series, the first coil and the second coil are arranged on a single PCB, and the winding direction of the first coil is opposite to the winding direction of the second coil. The single PCB closed rogowski coil comprises a plurality of same constitutional units which are connected in series, and the centers of the constitutional units are evenly distributed on a magnetic line of a magnetic field produced by current to be detected. Each constitutional unit comprises a circle of wire turn of the first coil and a circle of wire turn of the second coil, wherein the two wire turns are closely attached to each other. Each wire turn comprises an inlet wire, an outlet wire and a winding wire. The two outlet wires of the last constitutional unit are directly connected. The winding wires are formed by wires in different layers and holes among the different layers in a surrounding mode, the plane of each winding wire is perpendicular to the PCB surface, and the wiring routes of the winding wires coincide with one another in the direction perpendicular to the PCB surface. The normal direction of the magnetic line passing through the center of the section of the winding wires is approximately same with the direction of the section of the winding wires, and the tangential direction is approximately perpendicular to the section of the winding wires.

Description

technical field [0001] The present invention generally relates to a PCB (printed circuit board) Rogowski coil in a current sensor, and specifically relates to a design method and realization of a single PCB closed Rogowski coil for anti-magnetic field interference. Background technique [0002] Rogowski coil is a coil formed by uniformly winding wires on a frame of non-magnetic material with uniform cross-section. Rogowski coils have been widely used in current measurement devices because of their light weight, wide frequency band, good linearity and no magnetic saturation phenomenon. Rogowski coils can be divided into closed Rogowski coils and open Rogowski coils according to whether they can be opened during measurement. figure 1 Shown is a closed Rogowski coil. [0003] Closed Rogowski coil 100 includes the following parts: [0004] (1) signal output terminal 125 and signal output terminal 130; [0005] (2) the ring winding 110 from the signal output terminal 130 to t...

AI Technical Summary

Problems solved by technology

[0027] Figure 4A and Figure 4B The shown PCB closed Rogowski coil scheme composed of two sets of coils with opposite winding directions in series on a single PCB can better reduce the effect of external magnetic field interference, but the two coils designed in this way are still not very good. To achieve complete consistency, can not be well achieved to eliminate the influence of external magnetic field interference

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