scholarly journals Rogowski Coil for Current Measurement in a Cryogenic Environment

2015 ◽  
Vol 15 (2) ◽  
pp. 77-84 ◽  
Author(s):  
Tao Ma ◽  
Shaotao Dai ◽  
Jingye Zhang ◽  
Lianqi Zhao
Keyword(s):  
Output Voltage ◽  
Rogowski Coil ◽  
Measurement Precision ◽  
Current Measurement ◽  
Current Sensor ◽  
Coil Current ◽  
Large Bandwidth ◽  
Current Sharing ◽  
Primary Current ◽  
Better Than

Abstract A Rogowski coil based sensor for current measurement in a cryogenic environment and results of its application for paralleled high temperature superconducting (HTS) coil current sharing are presented. The current sensor consists of a Rogowski coil and an integrator, where the coil output voltage is proportional to the derivative of primary current and the integrator transfers the differentiation to normal state. The Rogowski coil has promising applicability at cryogenic circumstance because its body is made of low temperature materials. The integrator ensures a large bandwidth with feasible magnitude, which is vital for dynamic current measurement during the quench of the HTS coil. The proposed current sensor is used for current sharing measurement of two paralleled Bi2223 HTS coils, and the experimental results show that the measurement precision is better than 0.5%.

scholarly journals PCB-Embedded Spiral Pattern Pick-Up Coil Current Sensor for WBG Devices

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5747
Author(s):  
Hwa-Rang Cha ◽  
Kyeong-Mo Kim ◽  
Min-Soo Song ◽  
Rae-Young Kim
Keyword(s):  
Semiconductor Device ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Current Measurement ◽  
Circuit Board ◽  
Current Sensor ◽  
Spiral Pattern ◽  
Measurement Sensitivity ◽  
Coil Current ◽  
Parasitic Inductance

This paper proposes a current sensor for wide bandgap (WBG) devices. The current of a power semiconductor device is mainly measured using a Rogowski coil, an active current transformer, and a coaxial shunt resistor. The Rogowski coil and active current transformer are not suitable for the current measurement of surface mount WBG devices due to their operating principle. The coaxial shunt resistor causes parasitic inductance. Since WBG devices are more sensitive to parasitic inductance than silicon devices, parasitic inductance may affect circuit operation. To overcome these problems, this paper proposes a printed circuit board (PCB)-embedded spiral pattern pick-up coil current measurement for WBG devices. The proposed pick-up coil has high mutual inductance compared to the conventional pick-up coil, so the measurement sensitivity is high. In addition, there is no need for additional processing outside the PCB. Experimental results using a double pulse tester circuit are provided to verify the performance of the proposed current sensor.

scholarly journals Projeto experimental de uma placa de condicionamento de sinal para um sensor de corrente diferencial tipo Bobina de Rogowski

ForScience ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. e00797
Author(s):  
Débora Debiaze de Paula ◽  
Andreyna Sárila Ramos Ferreira ◽  
Paulo Jefferson Dias de Oliveira Evald ◽  
Cláudio Dornelles Mello Júnior ◽  
Rodrigo Zelir Azzolin
Keyword(s):  
Printed Circuit Boards ◽  
Rogowski Coil ◽  
Current Measurement ◽  
Measured Quantity ◽  
Circuit Boards ◽  
Signal Conditioning ◽  
Coil Current ◽  
Experimental Project ◽  
And Control ◽  
Physical Quantities

Realizar a medição de grandezas físicas, tais como corrente e tensão, com precisão é de fundamental importância na área da instrumentação para automação, visto que tais medições geralmente realimentam controladores em malha fechada. De modo geral, os sinais aquisitados são de baixa intensidade. Assim, é indispensável o uso de placas de condicionamento de sinal para converter a grandeza medida em uma forma adequada aos sistemas de processamento de dados e controle. Dessa forma, a principal contribuição deste trabalho é apresentar uma metodologia para elaboração de um sistema de condicionamento de sinais para leitura de corrente, por meio de um sensor do tipo Bobina de Rogowski. Assim, espera-se que, como resultado deste trabalho, qualquer pessoa consiga reproduzir o sistema de medição bem como as placas de circuito impresso apresentadas neste documento para a correta medição de corrente. Além disso, também são apresentados, de forma didática, os passos matemáticos que atendam as especificações do projeto de instrumentação proposto. Palavras-chave: Condicionamento de sinal. Bobina de Rogowski. Medição de corrente. Instrumentação.   Experimental project of a signal conditioning plate for a Rogowski coil differential current sensor Abstract Measurement of physical quantities, such as current and voltage, with precision is of fundamental importance in the area of instrumentation for automation, since such measurements generally feedback closed loop controllers. In general, the signals acquired have low intensity. Thus, it is essential to use signal conditioning plates to convert the measured quantity into a form suitable for data processing and control systems. Thus, the main contribution of this work is to present a methodology for the elaboration of a signal conditioning system for current reading, in a didactic way. It is expected that, as a result of this work, anyone can reproduce the measurement system, as well as the printed circuit boards presented in this document for correct current measurement. In addition, the mathematical steps that meet the specifications of the proposed instrumentation project are also presented in a didactic way. Keywords: Signal conditioning. Rogowski coil. Current measurement. Instrumentation.

MEMS Rogowski Coil Current Sensor with TSV Structural Wiring

2021 ◽  
Vol 24 (1) ◽  
pp. 101-106
Author(s):  
Yoshiyuki Watanabe ◽  
Mutsuto Kato ◽  
Toru Yahagi ◽  
Hiroki Murayama ◽  
Kenichi Yoshida ◽  
...  
Keyword(s):  
Rogowski Coil ◽  
Current Sensor ◽  
Coil Current

scholarly journals Implementation of a Dimmable LED Driver with Extendable Parallel Structure and Capacitive Current Sharing

2019 ◽  
Vol 9 (23) ◽  
pp. 5177 ◽  
Author(s):  
Hwu ◽  
Tai ◽  
Tu
Keyword(s):  
Output Voltage ◽  
Current Control ◽  
Parallel Structure ◽  
Current Sensor ◽  
Led Driver ◽  
Capacitive Current ◽  
Current Sharing ◽  
Voltage Stress ◽  
Basic Operating ◽  
Field Programmable

A dimmable LED driver along with an extendable series structure and interleaved capacitive current sharing is presented herein, the LED connection of which is changed from the traditional series structure to the proposed parallel structure. The number of LED strings can be extended. As the number of LED strings is increased, the output voltage of this LED driver and the voltage stress on the main switch are ideally not influenced. Moreover, only one current sensor is needed to achieve current control and dimming. In this paper, the basic operating principle of the proposed LED driver is described and analyzed. Finally, the effectiveness of this LED driver is demonstrated by experiment based on the field-programmable gate array (FPGA).

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