Amorphous wire magnetic field and DC current sensor based on the inverse Wiedemann effect

1991 ◽  
Vol 27 (6) ◽  
pp. 5241-5243 ◽  
Author(s):  
E. Pulido ◽  
R.P. del Real ◽  
F. Conde ◽  
G. Rivero ◽  
M. Vazquez ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Current Sensor ◽  
Amorphous Wire ◽  
Dc Current

Influence of Heating Temperature on the ΔЕ-Effect of Amorphous Fe75Si10B15 Wires

2014 ◽  
Vol 215 ◽  
pp. 264-267
Author(s):  
Andrey Semenov ◽  
Evgeniy Golygin ◽  
Alexey Gavriliuk ◽  
Alexander Mokhovikov ◽  
Alexander Gafarov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Inner Core ◽  
Heating Temperature ◽  
Amorphous Wire ◽  
Absolute Value ◽  
Tensile Stresses ◽  
Magnetoelastic Coupling ◽  
Field Magnitude ◽  
Magnetic Field Magnitude ◽  
Dc Current

In the present work we have investigated the influence of the thermocycling on the magnetoelastic parameters (the ΔЕ-effect) of amorphous Fe75Si10B15 wires, which had been pretreated by dc current j with simultaneous applying of the tensile stresses σ. It was figured out the ΔЕ-effect behavior depends strongly on pretreatment circumstances. Namely, we have got the maximum absolute value of the ΔЕ-effect shifted into direction of the higher magnetic field magnitude at j<39 MA/m2 and σ<127 MPa. In addition, the negative ΔЕ-effect was not observed for samples, pretreated at j≥45MА/m2 or σ≥128 MPa . The features of such a behavior of the ΔЕ-effect were explained in terms of the magnetoelastic coupling between the inner core and the outer shell of the amorphous wire.

Electrical conductivity identification of a carbon fiber composite material plate using a rotating magnetic field and multi-coil eddy current sensor

2018 ◽  
Vol 83 (2) ◽  
pp. 20901 ◽  
Author(s):  
Ahmed Chaouki Lahrech ◽  
Bachir Abdelhadi ◽  
Mouloud Feliachi ◽  
Abdelhalim Zaoui ◽  
Mohammed Naїdjate
Keyword(s):  
Magnetic Field ◽  
Neural Networks ◽  
Electrical Conductivity ◽  
Composite Material ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Rotating Magnetic Field ◽  
Current Sensor ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material

This paper proposes a contactless method for the identification of the electrical conductivity tensor of a carbon fiber composite materials plate using a rotating magnetic field and multi-coil eddy current sensor. This sensor consists of identical rectangular multi-coil, excited by two-phase sinusoidal current source in order to generate a rotating magnetic field and to avoid the mechanical rotation of the sensor. The fibers orientations, the longitudinal and transverse conductivities in each ply of carbon fiber composite material plate were directly determined with analysis of the impedance variation of each coil as function of its angular position. The inversion process is based on the use of artificial neural networks. The direct calculation associated with artificial neural networks makes use of 3D time-harmonic finite element method based on the A, V–A formulation.

Low Frequency Measurements in Amorphous Wire for Studying GMI Effect

2011 ◽  
Vol 495 ◽  
pp. 201-204
Author(s):  
Polykseni Vourna
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Major Change ◽  
Wheatstone Bridge ◽  
Amorphous Wire ◽  
Dc Voltage ◽  
Gmi Effect ◽  
Offset Voltage ◽  
Ac Current ◽  
The Magnetic Field

When a soft ferromagnetic material is flown by an ac current and a magnetic field is applied at the same time, a major change of its impedance is occurred. The aim of this paper is to investigate the influence of low frequency (1KHz-12KHz) ac current and the applied magnetic field on an amorphous magnetic wire (Co68Fe4.35Si12.5B15) without glass coating. For this purpose an experimental configuration has been setup, based on a Wheatstone bridge which receives an ac input signal from a frequency generator. The output is connected to the amorphous wire wrapped with a coil supplied by a dc voltage for the generation of the magnetic field. The output voltage pulse is measured for two cases a) The value of ac frequency is changing while the value of dc voltage applied to the coil remains constant (the magnetic field remains unchanged) and b) the magnetic field is changing while the ac frequency remains constant to a predefined value. Experimental results of the first scenario showed that when the frequency is altered a non-linear increase of the ac signal is observed at the output which shows an increase of the GMI effect and is related to the non-linearity of the wire’s permeability. For the second scenario the results showed an increase of the output signal offset (voltage) which also indicates an increase of the GMI effect.

Sensor of Current or Magnetic Field Based on Magnetoresistance Effect in (La0.7Ca0.3)0.8Mn1.2O3 Manganite Film

2009 ◽  
Vol 154 ◽  
pp. 157-161 ◽  
Author(s):  
V.P. Dyakonov ◽  
S. Piechota ◽  
K. Piotrowski ◽  
A. Szewczyk ◽  
H. Szymczak ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Short Circuit ◽  
Operation Time ◽  
Electric Circuit ◽  
Current Sensor ◽  
Detectable Change ◽  
Magnetoresistance Effect ◽  
Manganite Film ◽  
Current Value ◽  
A Current

The main objective of the performed investigations was to enhance sensitivity of a current sensor to weak changes of magnetic field. New design of the sensor of current based on magnetoresistance effect – MRE (MRE = (RH - R0)/R0 , where RH is the resistance in magnetic field and R0 is the resistance without magnetic field) was developed. The sensor was produced in the form of an annular magnet with a gap, in which the (La0.7Sr0.3)0.8Мn1.2О3 manganite film possessing large negative MRE was inserted. Nominal current in a controllable electric circuit can change from a few tenths parts of ampere to a hundred of amperes. The limit detectable change of current value depends on the size of gap in the annular magnet. The operation time of sensor at current overload and short circuit is less than 0.3 sec. These magnetoresistors are thermally stable over the temperature range from (- 50 ° С) to (+ 50 ° С). Proposed sensors based on MRE can be applied in many electrical arrangements and devices.

Compact Design of a Wide Bandwidth High Current Sensor Using Tilted Magnetic Field Sensors

2021 ◽  
Author(s):  
Philipp Ziegler ◽  
Yiru Zhao ◽  
Jorg Haarer ◽  
Johannes Ruthardt ◽  
Manuel Fischer ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Current Sensor ◽  
High Current ◽  
Wide Bandwidth ◽  
Magnetic Field Sensors ◽  
Compact Design ◽  
Tilted Magnetic Field

scholarly journals Magnetic Field Controlled Type Current Sensor

1987 ◽  
Vol 107 (7) ◽  
pp. 673-680 ◽  
Author(s):  
Toshikatsu Sonoda ◽  
Ryuzo Ueda
Keyword(s):  
Magnetic Field ◽  
Current Sensor
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