New Small-Volume High-Precision TMR Busbar DC Current Sensor

2020 ◽  
Vol 56 (2) ◽  
pp. 1-5
Author(s):  
X. P. Xu ◽  
T. Z. Liu ◽  
M. Zhu ◽  
J. G. Wang
Keyword(s):  
High Precision ◽  
Small Volume ◽  
Current Sensor ◽  
Dc Current

scholarly journals Characterization of DC Current Sensors With AC Distortion for Railway Applications

2020 ◽  
Author(s):  
Helko van den Brom ◽  
Ralph Hornecker ◽  
Ronald van Leeuwen
Keyword(s):  
High Precision ◽  
Dissipative Heating ◽  
Operating Conditions ◽  
Current Profile ◽  
Ratio Measurement ◽  
Current Dependence ◽  
Current Sensors ◽  
Dc Current ◽  
Reference Sensor ◽  
Current Shunt

<div>To assess the reliability of dc energy measurement equipment on-board trains, a setup was developed to characterize current transducers under realistic operating conditions. The operating principle is based on a current ratio measurement technique. The reference sensor is a high-precision zero-flux current transducer in combination with a broadband high-precision current shunt. The influence of ac distortion on this reference sensor was found to be within a few parts in 10<sup>6</sup> using an initial version of the setup, in which ac distortion was applied through a separate winding. A revised version of the setup employs a programmable electronic load to apply dynamic currents up to 600 A. The setup was used to characterize a 100 μohm high-current shunt resistor. The effect of dissipative heating on the dc transresistance error was around 0.03 %, with a settling time of about half an hour. The short-term intrinsic current dependence was also around 0.03 %. The effect of ac distortion was within a few parts in 10<sup>6</sup>. The intrinsic current dependence and the onset of the heating effect were also observed when exposing the sensor to a dynamic current profile that was recorded during a trip between two successive underground train stations on Metro de Madrid. These results demonstrate that the setup described in this paper is very effective for characterizing dc current sensors for practical railway applications. Future work will concentrate on even more demanding current signals, such as chopped signals, and on other types of sensors and measurement systems.</div>

Review of Ejection Seat Electronic Program Controller

2014 ◽  
Vol 551 ◽  
pp. 530-534
Author(s):  
Yu Fei Wang ◽  
Li Lin Han ◽  
Feng Wang
Keyword(s):  
Time Delay ◽  
High Precision ◽  
Small Volume ◽  
Light Weight ◽  
Separation System ◽  
Development Potential ◽  
Life Saving ◽  
Main Component ◽  
Program Controller

Ejector seat program controller is the key device unfolded by the separation of the control people-seat and lifesaving parachute after the seat ejection from the machine, which is the main component of seat separation system. Compared with the mechanical program controller, electronic program controller has many advantages: small volume, light weight, time delay of high precision, good flexibility, strong power, easy to expand, the tremendous development potential and splendid testability. This paper respectively introduces the English MK series seats, American ACES series seat and Russian K-36Дseries seat electronic program controller, focusing on the TWZI type electronic program controller developed by China Aviation Life-saving Institute

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

Parameters Design of Main Circuit of AC Constant Voltage Power Supply Based on Dual Directional Reversible PWM Control

2011 ◽  
Vol 383-390 ◽  
pp. 5771-5777
Author(s):  
Yu Quan Ma ◽  
Li Hong Zhang ◽  
Shu Fen Han ◽  
Zhi Peng Lin
Keyword(s):  
High Precision ◽  
Power Supply ◽  
Small Volume ◽  
High Efficiency ◽  
Pwm Control ◽  
Constant Voltage ◽  
Dc Voltage ◽  
Quality Of Supply ◽  
Parameters Calculation

The constant voltage power supply with dual directional reversible PWM compensation has merits of high precision, high efficiency, small volume, and so on. To ensure the quality of supply, it is important to fix the value of inductance, capacitance in main circuit. From the angle of filtering, and through analysis of the circuit working, detailed formulas of the inductance and capacitance calculation are given and an example of it is given too. In parameters calculation, to reduce the volume, the filter inductance is taken a smaller value but the capacitance is taken a greater value; the DC smoothing capacitance should be chosen according to the amplitude limit of DC voltage rising in inversion, and should be taken as great as possible to maintain voltage stabilizing precision.

Development of Fiber Optic Current Sensor

2014 ◽  
Vol 1040 ◽  
pp. 954-958
Author(s):  
Mikhail G. Grigoriev ◽  
Nikita V. Turushev
Keyword(s):  
High Precision ◽  
Precision Measurement ◽  
Faraday Effect ◽  
Fiber Optic ◽  
Precision Measurements ◽  
Current Sensor ◽  
Accuracy Analysis ◽  
High Precision Measurement ◽  
Modern Engineering ◽  
Current Measuring

Current measuring high-precision methods and devices are one of the most important modern engineering development lines in optimal energy consumption sphere. However, there are a few small-sized instruments which allow conducting precision measurements without breaking the circuit. This paper presents information about conducted Faraday Effect research and general construction of the simple fiber optic current sensor (FOCS). Researched sensor conception is used in prototype which is developing by team of laboratory number 63 of National Research Tomsk Polytechnic University Nondestructive Testing Institute. Required tests and accuracy analysis were conducted. Research results confirm that fiber optic current sensors provide high-precision measurement and proposed methodic is effective.

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