Rogowski coil and current measuring device

Abstract

The invention discloses a Rogowski coil and a current measuring device, and belongs to the field of current transformers. A Rogowski coil of the present invention comprises an upper layer of a coil, aloop layer and a lower layer of the coil, wherein the upper layer of a coil, the loop layer and the lower layer of the coil are provided with a plurality of conductive through-holes and metal platingmaterials. The plurality of conductive through-holes are evenly arranged and aligned in a radial direction to form a ring shape. The conductive through-holes of the annular inner ring of the upper layer of a coil are obliquely connected to the conductive through-holes of the annular outer ring by the metal plating materials. The metal plating materials of the loop layer are annularly formed and plated in the middle of the annular conductive through-holes. The conductive through-holes of the annular inner ring of the lower layer of the coil are radially connected to the conductive through-holes of the annular outer ring by the metal plating materials. The metal plating materials and the through-holes form a loop coil. According to the Rogowski coil and current measuring device, a multi-layer PCB is set on the Rogowski coil, the thickness of the Rogowski coil is increased, so that the mutual inductance coefficient of the Rogowski coil, which is the induced voltage of the output, is increased, the sensitivity coefficient of the coil is increased, which is advantageous for current measurement of a lower amplitude.

Description

technical field [0001] The present invention relates to a current transformer, and more particularly, to a Rogowski coil and a current measuring device. Background technique [0002] Traditional switching devices for pulsed current measurements include shunts and Rogowski coils (Rogowski coils). The shunt is suitable for measuring the pulse current with a narrow pulse width below 100kA; the shunt is a metal film resistor, and the structure includes a strip-folded type, a coaxial type, a disc type, etc., and the design idea is to reduce the stray inductance as much as possible. If the voltage amplitude is large, the pulse width is very wide or the installation position is limited, Rogowski coils are generally used as current conversion devices; traditional Rogowski coils are based on the principle of electromagnetic induction, and the enameled wire is wound on an insulating skeleton or iron core. When the current in the center of the coil passes through, An induced voltage w...

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to solve the problem that the existing PCB board Rogowski coil has a complex structure and is susceptible to environmental interference, and provides a Rogowski coil with a multi-layer PCB board to realize the winding of metal plating, so that the Rogowski coil manufacturing process is simple and improved. measurement accuracy

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