Design of a Rogowski Coil with a Magnetic Core Used for Measurements of Nanosecond Current Pulses

Purpose. An experimental verification of the existence of a range of values for the parameters of the capacitive energy storage of the magnetic-pulse installations with controlled vacuum discharger, in which, with a high probability, there is a «cut» of the discharge current pulses and the expansion of cylindrical thin-walled tubular workpieces using an external coil. Methodology. High voltage magnetic-pulse installation of NTU «KhPI» with controlled vacuum discharger, multiturn coil with inside dielectrical die and inside aluminum alloy workpiece are used. The capacitance and charge voltage of capacitive energy storage are changed. Discharge current pulses are measured by Rogowski coil and the oscillograph. Results. Parts of complicated shape are made by expansion of cylindrical tubular workpieces with help of external coil. Pressed metallic tubular part is removable from inner dielectric rod. Originality. The frequency of «cut» pulse is defined by negative magnetic field pressure amplitude. It is shown that we must coordinate this frequency and charge voltage with capacitive storage parameters by high probability of pulse «cut». Practical value. It is shown how to use installations with controlled vacuum dischargers in magnetic forming technology based on «cut» pulses.

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Influence of Rogowski coil structure for sub-ns current pulses

Review of Scientific Instruments ◽

10.1063/5.0050201 ◽

2021 ◽

Vol 92 (7) ◽

pp. 073303

Author(s):

V. Nassisi ◽

A. Serra

Keyword(s):

Rogowski Coil ◽

Current Pulses ◽

Coil Structure

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Development of a Self-integrating Rogowski Coil with Magnetic Core for High Impulse Current Measurement

10.1109/cieec50170.2021.9510811 ◽

2021 ◽

Author(s):

Wenting Li ◽

Zhaozhi Long ◽

Jiawei Fan ◽

Kangmin Hu ◽

Shaobo Liu ◽

...

Keyword(s):

Magnetic Core ◽

Rogowski Coil ◽

Current Measurement ◽

Impulse Current

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Fast response Rogowski coil with magnetic core

High Power Laser and Particle Beams ◽

10.3788/hplpb20102208.1954 ◽

2010 ◽

Vol 22 (8) ◽

pp. 1954-1958

Author(s):

张瑜 Zhang Yu ◽

刘金亮 Liu Jinliang ◽

白国强 Bai Guoqiang ◽

梁波 Liang Bo ◽

冯加怀 Feng Jiahuai

Keyword(s):

Fast Response ◽

Magnetic Core ◽

Rogowski Coil

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Very Fast Current Diagnostic for Linear Pulsed Beams

EPJ Web of Conferences ◽

10.1051/epjconf/201816702006 ◽

2018 ◽

Vol 167 ◽

pp. 02006

Author(s):

Vincenzo Nassisi ◽

Domenico Delle Side ◽

Vito Turco

Keyword(s):

Transmission Lines ◽

Rise Time ◽

Attenuation Factor ◽

Rogowski Coil ◽

Particle Accelerators ◽

Load Impedance ◽

Double Line ◽

New Device ◽

Current Pulses

Fast current pulses manage lasers and particle accelerators and require sophisticate systems to be detected. At today Rogowski coils are well known. They are designed and built with a toroidal structure. In recently application, flat transmission lines are imploded and for this reason we develop a linear Rogowski coil to detect current pulses inside flat conductors. To get deep information from the system, it was approached by means of the theory of the transmission lines. The coil we build presents a resistance but it doesn’t influence the rise time of the response, instead the integrating time. We also studied the influence of the magnetic properties of coil support. The new device was able to record pulses of more hundred nanoseconds depending on the inductance, load impedance and resistance of the coil. Furthermore, its response was characterized by a sub-nanosecond rise time (~100 ps), The attenuation coefficient depends mainly on the turn number of the coil, while the quality of the response depends both on the manufacture quality of the coil and on the magnetic core characteristics. In biophysical applications often, a double line is employed in order to have a sample as control and a sample stressed by a light source. So, in this case we build two equal plane lines by 100 Ω characteristic resistance connected in parallel. We diagnosed the current present in a line. The attenuation factor resulted to be 11,5 A/V.

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Development of Magnetic Core Framework for Flexible Rogowski Coil Current Transducer

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society ◽

10.1109/iecon43393.2020.9254471 ◽

2020 ◽

Author(s):

Chen Wei ◽

Cheng Lin ◽

Ma Boyang ◽

Guo Yuntao ◽

Yan Shi

Keyword(s):

Magnetic Core ◽

Rogowski Coil ◽

Coil Current ◽

Current Transducer ◽

Core Framework

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Using a Current Shunt for the Purpose of High-Current Pulse Measurement

Sensors ◽

10.3390/s21051835 ◽

2021 ◽

Vol 21 (5) ◽

pp. 1835

Author(s):

Pawel Piekielny ◽

Andrzej Waindok

Keyword(s):

Mathematical Model ◽

Power Supply ◽

Rogowski Coil ◽

High Current ◽

Shunt Resistance ◽

Software Comparison ◽

Current Pulses ◽

Measurement Results ◽

The Mathematical Model ◽

A Current

Measurement of high-current pulses is crucial in some special applications, e.g., electrodynamic accelerators (EA) and converters. In such cases, the current shunts have limitations concerning the frequency bandwidth. To overcome the problem, a method based on the shunt mathematical model is proposed. In the method, the solution of ordinary differential equations for the RL circuit is carried out in order to obtain the real current shape. To check the method, as a referee, a Rogowski coil dedicated to measuring high-current pulses was used. Additionally, the measurement results were compared with the mathematical model of the tested power supply system. Measurements were made for the short power supply circuit, which allows eliminating the nonlinearity. The calculations were carried out using a circuit model. In order to obtain the parameters of the shunt (resistance and inductance), it was modeled using an ANSYS/Q3D Extractor software. Comparison of calculation and measurement results confirms the correctness of our method. In order to compare results, the normalized root mean square error (NRMSE) was used.

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