Analysis and design of a self-oscillating quasi-digital fluxgate current sensor for DC current measurement

2021 ◽  
Vol 92 (2) ◽  
pp. 025001
Author(s):  
Xiaoguang Yang ◽  
Meiqi Chen ◽  
Zhe Jia
Keyword(s):  
Current Measurement ◽  
Current Sensor ◽  
Analysis And Design ◽  
Dc Current

scholarly journals AC/DC Current Sensor for Rotating Applications

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6811
Author(s):  
Miguel Angel Pardo-Vicente ◽  
Carlos A. Platero ◽  
José Ángel Sánchez-Fernández ◽  
Francisco Blázquez
Keyword(s):  
Computer Simulations ◽  
Direct Current ◽  
Electromagnetic Coupling ◽  
Experimental Tests ◽  
Signal Amplitude ◽  
Current Measurement ◽  
Current Sensor ◽  
External Fields ◽  
Large Size ◽  
Dc Current

There are several techniques for current measurement. Most of them are capable of measuring both alternating and direct current (AC/DC) components. However, they have severe drawbacks for rotating applications (large size, sensitivity to external fields, and low signal amplitude). In addition to these weaknesses, measured signals should be transmitted to a stationary part. In order to contribute solving these difficulties, this paper presents a sensor that can measure AC/DC simultaneously based on the electromagnetic coupling of two coils. To this aim, the measured waveform is analysed. In this paper, the design of such a sensor is presented. This design is validated through computer simulations and a prototype is built. The performance of this sensor prototype is analysed through experimental tests.

scholarly journals Nonintrusive Installation of the TMR Busbar DC Current Sensor

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
X. P. Xu ◽  
T. Z. Liu ◽  
M. Zhu ◽  
J. G. Wang
Keyword(s):  
Supply Voltage ◽  
Development Trend ◽  
Measurement Range ◽  
Current Measurement ◽  
Base Stations ◽  
Current Sensor ◽  
Electronic Systems ◽  
Power Electronic ◽  
Power Stations ◽  
Dc Current

In recent years, new energy vehicles, photovoltaic power stations, communication base stations, energy storage systems, and other power electronic systems have developed rapidly. The development of these systems has the trend of continuously increasing the power density per unit area, reducing the system volume, and continuously increasing using the busbars. More and more new current sensors will be used in these systems and play a key role. Traditional current sensor cannot meet the development trend of power electronic systems due to their large size and high cost. In this paper, a new small coreless tunnel junction magnetoresistance (TMR) busbar dc current sensor adopted differential scheme which improves the sensor’s anti-interference ability that is designed. The current sensor adopts an open-closed structure for easy nonintrusive installation. Four TMRs which adopted differential structure are placed on the edges of the busbar. The peak current measurement range is ±600 A, the rated current measurement range is ±300 A, and the supply voltage is 5 V.

scholarly journals Time-Multiplexed Self-Powered Wireless Current Sensor for Power Transmission Lines

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Hao Chen ◽  
Zhongnan Qian ◽  
Chengyin Liu ◽  
Jiande Wu ◽  
Wuhua Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Current Measurement ◽  
Current Sensor ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Current Sensing ◽  
Self Powered

Current measurement is a key part of the monitoring system for power transmission lines. Compared with the conventional current sensor, the distributed, self-powered and contactless current sensor has great advantages of safety and reliability. By integrating the current sensing function and the energy harvesting function of current transformer (CT), a time-multiplexed self-powered wireless sensor that can measure the power transmission line current is presented in this paper. Two operating modes of CT, including current sensing mode and energy harvesting mode, are analyzed in detail. Through the design of mode-switching circuit, harvesting circuit and measurement circuit are isolated using only one CT secondary coil, which eliminates the interference between energy harvesting and current measurement. Thus, the accurate measurement in the current sensing mode and the maximum energy collection in the energy harvesting mode are both realized, all of which simplify the online power transmission line monitoring. The designed time-multiplexed working mode allows the sensor to work at a lower transmission line current, at the expense of a lower working frequency. Finally, the proposed sensor is verified by experiments.

scholarly journals Development of a contactless DC current sensor with high linearity and sensitivity based on the magnetoelectric effect

2018 ◽  
Vol 27 (6) ◽  
pp. 065012 ◽  
Author(s):  
N Castro ◽  
S Reis ◽  
M P Silva ◽  
V Correia ◽  
S Lanceros-Mendez ◽  
...  
Keyword(s):  
Magnetoelectric Effect ◽  
Current Sensor ◽  
High Linearity ◽  
Dc Current

Inductor Current Measurement and Regulation Using a Single DC Link Current Sensor for Interleaved DC–DC Converters

2011 ◽  
Vol 26 (5) ◽  
pp. 1503-1510 ◽  
Author(s):  
Hongrae Kim ◽  
Milad Falahi ◽  
Thomas M. Jahns ◽  
Michael W. Degner
Keyword(s):  
Current Measurement ◽  
Current Sensor
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