Splitting of the Magnetic Loss Peak of Composites under External Magnetic Field

Composite materials filled with ferromagnetic inclusions are useful in the development of various microwave devices. The performance of such devices is determined both by material properties (such as the saturation magnetization and the permeability) and by the demagnetization effects. The paper is devoted to the study of the demagnetization effect on the permeability measurements of composites under external magnetic bias. The microwave permeability of composites filled with flake sendust (Fe-Si-Al alloy) particles is measured as a function of frequency and the external magnetic field. The measurements are carried out by the Nicolson–Ross–Weir technique in a 7/3 coaxial line in the frequency range of 0.1 to 20 GHz by a vector network analyzer. It is found that the magnetic loss peak is split under external fields of more than 1.5 kOe. The main aim of this paper is to study the causes of this splitting and to interpret the observed magnetic loss peaks. To study this effect, the samples of various thicknesses and the samples with isotropic and anisotropic orientations of particles are measured. The particles in the anisotropic samples are oriented by a strong uniform magnetic field. At a small fraction of inclusions, the permanent magnetic field is demagnetized on the individual particles rather than the whole sample. The splitting of the magnetic loss peak of the isotropic sample is caused by different orientations of particles in the sample. At a high fraction of inclusions, the permanent magnetic field is demagnetized on the whole sample and the magnetic loss peak of the isotropic sample is not split. The saturation magnetization of the material is found by measurements under the external magnetic field of the anisotropic sample.

The consequence of magnetic field on the parameters of brackish water in batch and continuous flow system

Background The concept of magnetized water and the historically abbreviated glimpse were discussed. Therefore, the magnetic water treatment method has been summed up and considered a better and cleaner physical technique for water handling. This experimental work is focused on the effect of magnetic treatment on certain water parameters such as temperature, electrical conductivity (EC), total dissolved salts (TDS), and pH by exposing water to a permanent magnetic field (PMF) with a magnetic flux density (B = 1.45 T ± 0.05). Results This technique is realized by using a fixed system that depends on the application of both pump and valve control to induce the required circulation of employed water. Both open loop and closed loop are applied as a function of exposure time. Considering that the type of used water is brackish groundwater. The results showed that at open and closed flow conditions, the PMF causes variations in the values of the measured parameters for the outflow water. The theoretical approach is subjected to measure the molecular interaction of water system H-bonded systems based on DFT level with function B3LYP on Gaussian 09 software with a specific concentration of NaCl. This research focuses on the relation between the molecular structure of water and the dissolved NaCl with respect to applying a magnetic field with a varying force from 1 to 85 T. Conclusion The water's magnetization technique is simple without using extra energy by using a PWT tool to create a permanent magnetic field (B = 1.45 T ± 0.05) when installing it on a water tube system that was previously mounted. This environmentally friendly, renewable technology, therefore, does not need any additional energy requirements.

Experimental Installation for Determination of Attenuation Coefficient of Permanent Magnetic Field by Protective Materials

The permanent magnetic field in addition to electromagnetic radiation has a significant effect on performance of devices. This is particularly true for highly sensitive precision measuring equipment, such as, for example, magnetometers or photomultiplier tubes. In this regard a new high-performance materials for protection against permanent fields and electromagnetic radiation need to be developed. The purpose of this paper is a development of a hardware and software complex for high-precision determination of permanent magnetic field attenuation coefficient and certification of protective materials.This paper describes an experimental installation for determining the attenuation coefficient of a permanent magnetic field using materials and coatings on standard package for electronic equipment. The installation ensures a uniform magnetic field flow in the measurement volume. The advantage of the measuring device is the ability to measure magnetic field in three coordinates due to the use of three pairs of Helmholtz coils and a three-dimensional Hall sensor. The software will enable to control of the magnetic field in all three directions, simulating the real operating conditions of devices that require protection from such influences. In addition, a movable positioning system makes it possible to compensate for the Earth's magnetic field, which increases the accuracy of estimating the attenuation coefficient by protective materials in weak magnetic field.An alternative use of the capabilities of the installation is to test the performance of the devices in a permanent magnetic field and evaluate the electromagnetic compatibility. Experimental results of the work includes determination of the magnetic field attenuation coefficient using standard photomultiplier tube package made of electrolytically deposited permalloy and the sheet of annealed permalloy. Thus, the effect of annealing and closed magnetic circuit on the degree of weakening of the magnetic field is shown. It has been demonstrated that annealing which causes a significant increase in the magnetic permeability promotes an effective attenuation of weak magnetic fields (up to 1 mT). In magnetic fields with an induction of 1 mT or more, effective attenuation is provided by a closed magnetic circuit.

The classification and modern use of magnetic dosage forms in medicine

Currently, quite a large variety of magnetic therapy products, including magnetic dosage forms (MDF), is used in medicine. MDF contain different magnetic materials. MDF either contain or do not contain medicinal substances (MS) in their composition. The therapeutic action of MDF is produced by either a biotropic effect of magnetic field (MF) in case MDF is a source of permanent magnetic field, or mechanic action of MDF based on their interaction with an external source of MF, or a combination of the biotropic and mechanic actions. MDF used in medicine have been reviewed, and their classification by magnetic filler type has been provided.

The classification and modern use of magnetic dosage forms in medicine

Currently, quite a large variety of magnetic therapy products, including magnetic dosage forms (MDF), is used in medicine. MDF contain different magnetic materials. MDF either contain or do not contain medicinal substances (MS) in their composition. The therapeutic action of MDF is produced by either a biotropic effect of magnetic field (MF) in case MDF is a source of permanent magnetic field, or mechanic action of MDF based on their interaction with an external source of MF, or a combination of the biotropic and mechanic actions. MDF used in medicine have been reviewed, and their classification by magnetic filler type has been provided.

INVESTIGATION OF THE EFFECT OF THE PERMANENT MAGNETIC FIELD OF THE MAGNETIC ANTI-PARAFFIN DEVICE ON THE STRUCTURE ASPHALT-RESIN-PARAFFIN SEDIMENT

The limited world oil reserves force to actively develop and use fields with relatively low debit wells, as well as fields with difficult oil production conditions, with high-viscosity oil and with a significant content of foreign inclusions. One of the most unpleasant and serious complications in oil equipment is asphalt-resin-paraffin deposits. Therefore, one of the most important tasks is to study the mechanism and conditions of formation of asphalt-resin-paraffin deposits, as well as the development of effective methods to combat them. Analysis of wells in which asphalt-resin-paraffin deposits are observed, shows that the presence of paraffin, regardless of its amount in oil, poses many technological and technical tasks related to the elimination of complications associated with asphalt-resin-paraffin deposits. The presence of asphalt-resin-paraffin deposits leads to a decrease in the flow rate of wells due to clogging of pores and deterioration of filtration of oil-saturated formations. During downhole oil production, asphalt-resin-paraffins accumulate in the form of deposits on the walls of pump-compressor pipes (tubing) and oilfield equipment, thereby reducing the cross section of pipelines and lead to a decrease in the flow rate of wells. In a given hour, there are close to twenty new ways of fighting with embedded paraffin. Leather with methods of combating paraffin waxing in the process of choosing effective methods for preserving and visualizing paraffin waxes without preserving the trivial mid-repair period of robotics in the drill holes, for improving the efficiency of mathematics. The use of magnetic oil treatment devices is effective in preventing these problems. The high practical efficiency of such devices is evidenced by the increasing attention paid to the development of these devices and their patenting by various foreign firms. One such device, called a magnetic anti-paraffin device, will be discussed in detail in this paper. The device was tested at the Boryslav field from 2002 to 2007, where it gave good results in contrast to other methods. MAP has significantly reduced the percentage of asphalt-resin-paraffin deposits formation in the production area and transferred the process of their utilization to the refinery №10 in Boryslav, which in turn allows to preserve valuable components of asphalt-resin-paraffin deposits for their further use and improve the environmental condition of oil fields. The use of magnetic antiparaffin device can be effective both in the gushing of the well and in the operation of its deep-rod centrifugal and diaphragm pumps, as well as on oil pipelines. The maintenance period due to the use of magnetic antiparaffin device, in particular at OJSC Ukrnafta, increased 1.5-2.6 times. The advanced MAP device differs from other magnetic devices for liquid processing in that no power supply to the device is required for work as it works on permanent magnets. Keywords: pipeline transportation of petroleum products, trunk oil pipelines, high viscosity oil, paraffin deposition, permanent magnetic field.

RESEARCH ON WORK OF A STEPPER MOTOR OF ELECTRICITY METERS UNDER THE INFLUENCE OF AN EXTERNAL PERMANENT MAGNETIC FIELD CREATED WITH THE PURPOSE OF UNCOUNTED CONSUMPTION OF ELECTRIC ENERGY

Research on facts and circumstances of electrical energy uncounted consumption in the practice of conducting electrical engineering forensic examination is one of the most common. Study of the influence of a permanent magnetic field on operation of the electromechanical electricity meters is one of the areas of electrical engineering research, where scientific and practical analysis is absent in electrical engineering forensic examination. The tasks solved by electrical engineering forensic examination of electricity meters subjected to interference in their work due to the influence of an external permanent magnetic field are still being solved indirectly, mainly by examining the state of indicators of the effect of a magnetic field. The Article purpose is to determine the mechanism of interference in the operation of a stepper motor of electromechanical electricity meters of energy accounting meters under the influence of an external magnetic field artificially developed to disregard the consumption of electric power. The article examines the structure of a stepper motor of electronic-mechanical devices metering electric power. A research model of a stepper motor is built. The analysis of distribution of force magnetic lines in the magnetic system and in the magnetic shield of a stepper motor as a result of influence of an external magnetic field artificially created for the purpose of uncounted consumption of electric power in the absence of such an effect on the basis of modeling with the use of software and a mathematical apparatus: the finite element method. The mechanism of interference in the regular operation of a stepper motor of electricity meter is determined when approaching the metering device of an external permanent magnet with a high value of maximum specific energy in order to consume electric power negligently.

Magnetic Field Analysis of Polishing Tools in Permanent Magnetic Field Polishing Device

In order to achieve the polishing of the inner wall of the workpiece with a complex internal cavity structure. In this paper, a planar polishing machine is used as an example to design a polishing device platform. The permanent magnet is used as a magnetic field to drive the polishing tool to polish the inner surface of the workpiece. In this paper, a magnetic field internal polishing analysis method is proposed, which mainly uses the matlab to qualitatively analyze the magnetic force and magnetic moment of the polishing tool, and then qualitatively analyze its motion stability.