Fault detection of electrical equipment by rapid calculation of the magnetic field from single-circuit twisted three-phase cables

2017 ◽  
Author(s):  
Giovanni Mazzanti ◽  
Leonardo Sandrolini ◽  
Marco Landini ◽  
Effrosyni Kandia ◽  
Alessandro Tacchini ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fault Detection ◽  
Electrical Equipment ◽  
Three Phase ◽  
Rapid Calculation ◽  
The Magnetic Field

scholarly journals STUDY OF THE MAGNETIC FIELD OF THREE PHASE LINES OF SINGLE CORE POWER CABLES WITH TWO-END BONDING OF THEIR SHIELDS

2015 ◽  
Vol 0 (4) ◽  
pp. 56-61 ◽  
Author(s):  
V. Yu. Rozov ◽  
A. A. Kvytsynskyi ◽  
P. N. Dobrodeyev ◽  
V. S. Grinchenko ◽  
A. V. Erisov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Power Cables ◽  
Three Phase ◽  
The Magnetic Field

scholarly journals Modeling the spatial distribution of magnetic fields of low frequency multiple sources

2021 ◽  
Vol 5 (2) ◽  
pp. 34-37
Author(s):  
Larysa Levchenko
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Compatibility ◽  
Three Dimensional ◽  
Low Frequency ◽  
Electrical Equipment ◽  
Technical Equipment ◽  
Multiple Sources ◽  
Matlab Package ◽  
Many Sources ◽  
The Magnetic Field

The work is show that in conditions of dense the location of electrical equipment in the premises, buildings and on territories to ensure the regulatory levels of electromagnetic compatibility of personnel and the population, it is advisable to carry out preliminary modeling of the propagation of electromagnetic fields it is advisable. Considering the insignificant shielding of the magnetic field by the equipment cases, it is advisable to carry out modeling based on the magnetic component of the electromagnetic field. The mathematical ratio of the propagation of the magnetic field of individual sources, taking into account their dipole model, has been determined. The modeling was carried out for sources of the dipole and dipole-quadrupole types. Three-dimensional models of sources with the propagation of dipole, quadrupole and dipole-quadrupole harmonics of the field are provided, using the Matlab package. Application software has been developed in the C environment, using the SQL server database, and modeling of the propagation of the magnetic field of many sources in a certain plane has been carried out. This result is show that even for electrical equipment that operates to determine the reduced magnetic field isolines experimentally very difficult. At the design stages of equipment placement, modeling is the only tool for predicting the electromagnetic environment, which determines the electromagnetic compatibility of technical equipment and the electromagnetic safety of personnel and the public.

Rheology and Behavior of Magnetic Fluids in Alternating/Rotating Magnetic Fields

2003 ◽  
Author(s):  
Carlos Rinaldi ◽  
Xiaowei He ◽  
Adam Rosenthal ◽  
Thomas Franklin ◽  
Cory Lorenz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Fluids ◽  
Rotating Magnetic Fields ◽  
Magnetic Field Rotation ◽  
Three Phase ◽  
Field Rotation ◽  
And Behavior ◽  
The Magnetic Field ◽  
Cylindrical Test

The rheology and behavior of magnetic fluids in the presence of time-varying magnetic fields is illustrated through three sets of experiments. The first involves measurements of ferrofluid torque on a cylindrical spindle under applied uniform rotating magnetic fields. We measure the torque required to restrain a stationary cylindrical test wall in contact with aqueous ferrofluids subjected to the rotating uniform magnetic field generated by a three-phase AC 2-pole motor stator winding. The torque is found to scale linearly with volume, and to be a function of the applied magnetic field amplitude, frequency and direction of rotation. Measurements show that for ferrofluid entirely inside the cylindrical test wall the torque points in the same direction as the magnetic field rotation pseudovector, whereas for ferrofluid entirely outside the cylindrical wall the torque points in the direction opposite to the field rotation pseudovector. The second set of experiments explores the formation of ordered ferrofluid structures in the gap of a Hele-Shaw cell subjected to simultaneous vertical DC and in-plane horizontal rotating magnetic fields. Finally, the third set of experiments illustrates the effect of applied DC fields on the shape of ferrofluid jets and sheets.

scholarly journals Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

2019 ◽  
Vol 28 ◽  
pp. 01007
Author(s):  
Dariusz Kusiak ◽  
Tomasz Szczegielniak ◽  
Zygmunt Piątek
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Proximity Effect ◽  
Eddy Currents ◽  
Skin Effect ◽  
High Current ◽  
Current Frequency ◽  
Three Phase ◽  
The Magnetic Field ◽  
Outer Area

The article shows the total magnetic field distribution in two outer conductors of the flat, three-phase single-pole shielded, high-current busduct is asymmetric. The phase currents in the shielded conductors decide about the magnetic field of such a high-current busduct. The components of this field reflect the magnetic field of the reverse reaction fields of the eddy currents induced in the conductors of the adjacent phases as the results of the proximity effect and the skin effect. The field distribution is shown in the outer area of the outer phases as the function of the parameters reflecting the current frequency, the conductivity, and the transverse dimensions of the tubular conductors.

Research and Design for Three-Axis Electromagnetic Leakage Detector

2012 ◽  
Vol 241-244 ◽  
pp. 223-226
Author(s):  
Jiang Shan Qian ◽  
Zhong Ran Zhou ◽  
Yu Wang ◽  
Tong Guang Shao ◽  
Jin Bo Zhang
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Coupling ◽  
Low Frequency ◽  
Electrical Equipment ◽  
Electronic Products ◽  
Total Magnetic Field ◽  
Leakage Magnetic Field ◽  
Measurement Experiment ◽  
Research And Design ◽  
The Magnetic Field

In order to measure the magnetic field around electronic products, household appliances and industrial electrical equipment, this paper puts forward a new method which makes use of electromagnetic coupling design based on three-axis electromagnetic leakage. This method can overcome the disadvantage of traditional single-axis measurement which needs to get the total magnetic field after several times’ measurement. This paper designs three-axis electromagnetic leakage detector for circuit measurement, which is proved to be correct after circuit measurement experiment. It can easily detect 30-2K Hz leakage magnetic field of low frequency generated from electrical appliances products.Introduction.

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