437 results about "Saturation (magnetic)" patented technology

The invention relates to a Fe-Si-Nb-B-Cu-Er amorphous alloy and a preparation method and application thereof, and belongs to the technical field of metal materials. The atomic percent expression of the Fe-Si-Nb-B-Cu-Er amorphous alloy disclosed by the invention is (Fe < 83 > Si < 3 > Nb < 4 > B < 9 > Cu < 1 >) < 100-x > Er < x >, wherein x is equal to 3.5 to 4.5. The rare earth element Er is added to optimize the soft magnetic performance of a Fe-Si-Nb-B-Cu amorphous alloy system, the coercive force of the Fe-Si-Nb-B-Cu amorphous alloy system is reduced, the preparation method is simple and easy to implement, and the Fe-based amorphous alloy with the excellent soft magnetization performance is obtained. The magnetization intensity of the amorphous alloy is sharply increased along with increase of a magnetic field under a low magnetic field and then gradually reaches saturation, typical soft magnetic performance is presented, and the amorphous alloy has wide application space in the field of magnetic materials.

The invention belongs to the field of hard alloy materials, and provides a modified high-performance non-magnetic hard alloy and a preparation process thereof. The surface of a WC particle is chemically plated with a Ni-P-B-Cr-Cu amorphous shell layer, and a binding phase is converted into Ni3P and Ni3B nanophase through two-stage sintering. The WC alloy comprises the following components in parts by weight: 85-95 parts of WC, 12-25 parts of a binding phase and 0.5-1.4 parts of a grain growth inhibitor, the nanophase accounts for 35-50% of the volume of the binding phase and 35-50% of the total volume of the binding phase, and the grain size is 80-125 nm; the average grain size of WC is 0.6-1.0 [mu] m; and the thickness of an interface P enrichment layer is 8-15 nm (the coverage rate is 85-95%). Through interface engineering and controlled crystallization from amorphous to nanocrystalline, the relative magnetic conductivity is 1.001-1.015, the hardness HRA is 90.5-93.0, the strength TRS is 2.2-3.0 GPa, the toughness KWP is 300-450 N / mm, and the magnetic saturation strength is 0.02-0.15 T. The problem of decoupling of the magnetic property and the mechanical property of a traditional non-magnetic hard alloy is solved, and the non-magnetic hard alloy is suitable for magnetic sensitive environments such as semiconductor equipment, precise measurement, MRI tools and oil service logging.

The application relates to a method for one-step synthesis of strong magnetic hydrophobic Fe3O4 nanoparticles at low temperature and the Fe3O4 nanoparticles and application, and belongs to the technical field of nano material preparation. The method comprises the following steps: adding a ferrous sulfate solution into a mixed solution of sodium hydroxide and sodium nitrate, heating and stirring to react, adding oleic acid in the reaction process, and obtaining black Fe3O4 crystals after the reaction is completed. The saturation magnetization of the obtained strong magnetic hydrophobic Fe3O4 nanoparticles can reach 85.69 emu / g at most, and the water contact angle can reach 148.95 DEG. The one-step synthesis reaction only needs to use oleic acid as a regulator, avoids an extreme high-temperature and high-pressure environment, does not need to use a toxic chemical solvent, the condition is mild, the process is simple, the operation condition is easy to control, and the method has a wide application prospect.

The invention discloses a ferromagnetic material internal defect leakage magnetic field increasing method based on alternating current and direct current composite magnetization, which comprises the following steps of: fixing a workpiece at the center of a composite exciting coil, and synchronously applying direct current and high-frequency alternating current; after pure direct current magnetization is saturated, current is locked, and a basic leakage magnetic field is established; the surface magnetic conductivity is dynamically reduced by overlapping alternating current, and the magnetic shielding effect is weakened; a leakage magnetic field signal is scanned and collected through a differential Hall sensor array, and background magnetic field deduction, peak value comparison and adaptive filtering processing are carried out; and determining an optimal magnetization parameter combination by adopting a gradient descent method and Bayesian optimization. The system is integrated with a composite excitation coil and a signal conditioning unit, so that synchronous excitation, signal acquisition and real-time analysis are realized. The leakage magnetic field signal at the deep defect is enhanced through alternating-current and direct-current composite magnetization, the problem of signal weakening caused by traditional direct-current saturation is solved, the defect detection sensitivity and efficiency are improved, and the method is suitable for non-destructive detection scenes of ferromagnetic materials.

The present invention comprises a method for jointly processing data from the nuclear magnetic resonant (NMR) response of oil and rock samples in in natura condition, and its main product is the delimitation of the oil saturation (So) present in the rock samples, i.e., the determination of the range of admissible values of the volumetric fraction of the porous volume of the rock occupied by such fluid. The method requires a small volume of oil, originating from or of a composition similar to the oil present in the rock being tested, since it is based on both the measurement of the NMR response of the rock sample and the response of the fluid sample. These two sets of data feed a statistical inference scheme that (1) determines a range of admissible values for the So of the sample, delimited by the minimum and maximum oil saturation values compatible with the two sets of data presented; (2) produces, for each of these extreme values of admissible So, a decomposition of the rock relaxation time spectrum into two complementary spectra, the first highlighting the signatures relating to oil and the second comprising the distribution of the rock relaxometric signatures that cannot correspond to such fluid under the prescribed saturation condition.

The invention provides a composite groove type stator punching sheet and a motor formed thereof.The stator punching sheet comprises M composite grooves distributed in the circumferential direction of the stator punching sheet, each composite groove comprises a first winding groove and a second winding groove which are distributed along the two sides of the center line of the groove, and the first winding grooves and the second winding grooves are different in structure; the inner side wall of the first winding groove comprises at least one section of arc, and the inner side wall of the second winding groove does not comprise an arc and is only enclosed by straight lines; m is an integer greater than or equal to 3. The first winding slots effectively modulate an air-gap magnetic field by utilizing smooth arc-shaped contours of the first winding slots, so that cogging torque and torque pulsation caused by magnetic conductance change are greatly reduced; the second winding groove is used for enhancing the magnetic circuit capacity and ensuring that the main magnetic flux can pass through efficiently without saturation, so that the harmonic content and the stator iron loss are greatly reduced; the first winding groove and the second winding groove complement each other in the aspects of electromagnetic performance and process advantages and are synergistically enhanced, so that a high-performance and low-cost synergistic effect is realized.

The invention discloses a port area flexible load millisecond-level cooperative suppression method based on magnetic flux jump prediction, and the method comprises the steps: obtaining the external vibration and electrical data of a transformer, combining the Bayesian inversion of physical constraint, and reconstructing an internal three-dimensional magnetic flux field; based on time sequence evolution of the magnetic flux field, a dual-mode self-adaptive prediction algorithm is adopted, and a magnetic flux jump early warning vector containing jump time, amplitude and position is generated; and according to the early warning vector, through a multi-layer cooperative control strategy of time sequence decoupling, a control instruction for the flexible load of the harbor district is generated and executed. Advanced early warning and millisecond-level active suppression of the potential magnetic saturation risk are realized, and the operation reliability and equipment safety of a harbor district power distribution system are improved.

The invention relates to the technical field of shale exploitation, and discloses a shale reservoir wettability dynamic determination method, which comprises: S1, selecting a shale plunger core, carrying out supercritical CO2 cleaning and vacuum drying, and carrying out high pressure saturation by using simulated crude oil to obtain an initial oil saturation; and S2, the saturated rock core is loaded into a high-temperature and high-pressure rock core holder, and under the simulated formation temperature and pressure condition, simulated formation water containing the paramagnetic contrast agent is injected at the constant flow speed for displacement till the water content of the outlet end reaches 98%. According to the invention, dynamic and three-dimensional space representation of wettability is realized: three modal data of nuclear magnetic resonance, resistivity and sound wave are synchronously acquired in the displacement process, so that the limitation of a traditional static method is overcome, and the dynamic process of the wettability changing along with the fluid saturation state can be captured in real time; and finally, a high-resolution three-dimensional wettability distribution map is generated, and non-uniform distribution of wettability in the core is visually revealed.

The invention belongs to the technical field of magnetic shielding materials, and particularly relates to a nanocrystalline slotting and soft magnetic alloy powder filling composite magnetic sheet and a preparation method thereof. The composite magnetic sheet comprises a magnetic material layer formed by alternately compounding a nanocrystalline material layer and a double-faced adhesive tape, the magnetic material layer is provided with regularly distributed slotting structures, and the slotting structures are filled with soft magnetic alloy powder. The preparation method comprises the following steps: alternately compounding a nanocrystalline material layer and a double-faced adhesive tape to form a magnetic material layer, and performing die cutting to form a regularly distributed slotting structure; or the nanocrystalline material composite layer is subjected to die cutting to form a regularly-distributed through slotting structure, and then the structure is compounded with the composite layer which is not slotted to obtain the magnetic material layer; and then filling and fixing the slotting structure by adopting soft magnetic alloy powder to obtain the composite magnetic sheet. According to the invention, the defect of easy magnetic saturation due to local lack of magnetic materials after slotting can be avoided, and the obtained composite magnetic sheet has low loss and high saturation current at the same time.

The invention provides an annular segmented iron yoke center magnetic field uniformity optimization method and device, relates to the technical field of superconducting electrical iron yokes, and solves the technical problem that the uniformity of a superconducting magnet center magnetic field is difficult to improve in the prior art. The method specifically comprises the following steps: acquiring physical basic parameters of the superconducting magnet; establishing a two-dimensional axisymmetric calculation model, determining radial and axial calculation ranges, and generating a two-dimensional grid coordinate matrix; calculating an initial static magnetic field by using the two-dimensional grid coordinate matrix based on the Biot-Savart law and the axial symmetry characteristic; constructing an annular yoke multi-parameter optimization problem, and performing global parameter search by adopting a genetic algorithm to obtain yoke optimization parameters; based on the magnetic dipole theory and the saturation characteristic of the ferromagnetic material, a correction model of the yoke to the magnetic field is established by combining yoke optimization parameters, an additional magnetic field generated by the yoke is calculated, the additional magnetic field and the initial static magnetic field are superposed, and the total magnetic field intensity is obtained. The method is used for optimizing the uniformity of the iron yoke center magnetic field.

The invention discloses a high-current magnetic saturation suppression method for a high-temperature-resistant magneto-sensitive element, which belongs to the technical field of electromagnetic measurement and comprises the following steps: acquiring a working temperature parameter and a measured current parameter of the magneto-sensitive element; performing operation by using a nonlinear coupling function to obtain a magnetic circuit control instruction; based on the instruction, adjusting the gradient composite magnetic core to obtain a magnetic conductivity distribution state; when it is monitored that the temperature value of the outer layer material exceeds a temperature threshold value, the thermally-induced deformation magnetic circuit switch is driven to deform; the movable magnetic shunt piece is driven by deformation action to cut into the main magnetic circuit to form a magnetic flux shunt path; the air gap area of the magnetic flux shunting path is used for exciting an eddy magnetic field, magnetic saturation is inhibited, and a stable magnetic field signal is output. According to the invention, a multi-stage cooperative control strategy combining gradient magnetic core dynamic adjustment, thermally induced physical shunting and eddy current suppression is adopted, so that the magnetic saturation phenomenon under high temperature and large current can be effectively suppressed, measurement drift is compensated, and the working stability and precision of the magnetosensitive element are remarkably improved.

The application relates to a nickel-zinc-copper ferrite and a preparation method and application thereof, the nickel-zinc-copper ferrite comprising main components and auxiliary components; the main components comprise Fe2O3 64-66.7 mol%, NiO 9-12 mol%, ZnO 13.5-19 mol% and CuO 3-9.5 mol% with the total mole percentage being 100 mol%; the auxiliary components comprise Bi2O3 0.3-1.5 wt%, Co2O3 0.1-0.6 wt%, CaCO3 0.03-0.08 wt% and ZrO2 less than or equal to 0.1 wt% with the total mass percentage of the main components being taken as a standard. The content of Fe2O3, ZnO, NiO and CuO is controlled, the content of the auxiliary components is matched and adjusted, the prepared nickel-zinc-copper ferrite has high saturation magnetic induction intensity, high magnetic permeability, high Curie temperature, low residual magnetic induction intensity and low specific temperature coefficient, and can be better applied to power inductance or common-mode inductance.

The application discloses a kind of based on magnetic resonance spectrum half-width's magnetic nano particle mass concentration calculation method, belong to magnetic nano material testing technical field, the application with magnetic nano particle induces local magnetic field inhomogeneity and causes magnetic resonance spectrum to produce change as medium, the relationship between the mass concentration of magnetic nano particle and magnetic resonance spectrum half-width is established, since the saturation magnetization intensity of single magnetic nano particle is fixed, so the change of the mass concentration of magnetic nano particle is essentially the change of the number of magnetic nano particle, mass concentration and magnetic resonance spectrum half-width have linear relationship, the change of magnetic nano particle mass concentration can be reflected by measuring magnetic resonance spectrum half-width, realize the measurement of magnetic nano particle mass concentration.

A method of controlling the magnetic saturation of the core of a DC common mode choke comprising a magnetic core 1 and first and second coils 2, 3, comprises: determining the saturation percentage of

The application belongs to the technical field of alloy smelting, and particularly relates to a high-frequency nanocrystalline material and a preparation method and application thereof. The application provides a high-frequency nanocrystalline material, the material is a high-frequency nanocrystalline alloy, and the composition expression of the alloy is: Fe a Ni b Si c M d N e ; the M is one or more of Ti, Mn, Zn and Al; the N is one or more of La, Ce and Tb; wherein a, b, c, d and e respectively represent the atomic percentage content of each corresponding component, 60<=a<=72, 10<=b<=15, 5<=c<=10, 3<=d<=8, and e=100-a-b-c-d. The high-frequency nanocrystalline material utilizes the characteristics of amorphous alloy, and distributes nanocrystalline particles on the amorphous matrix, so that excellent soft magnetic performance is achieved. The material has the characteristics of high saturation magnetic flux density and low coercivity, and has more excellent performance in high-frequency application.

To provide a rotor core capable of suppressing the occurrence of an air gap and efficiently rotating.SOLUTION: The rotor core includes an inner core provided with a magnet insertion hole, and an outer core covering an outer peripheral surface of the inner core. A saturation magnetic flux density of the outer core is less than a saturation magnetic flux density of the inner core. Since the outer core is formed of a magnetic material, it is possible to suppress generation of an air gap between the rotor core and the stator. In addition, since the saturation magnetic flux density of the outer core is less than the saturation magnetic flux density of the inner core, a short circuit of the magnetic flux can be suppressed.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of preparation of nano functional materials, and particularly discloses magnetic nano ferroferric oxide regulated and controlled by polyaspartic acid and a preparation method and application thereof.The preparation method comprises the following steps that 1, a dispersing agent polyaspartic acid or a salt water solution of the polyaspartic acid is added into a Fe < 2 + > / Fe < 3 + > mixed solution, and the mixture is stirred to be uniform to form a precursor dispersion solution; (2) heating the precursor dispersion liquid, dropwise adding an alkali source to adjust the pH value of a reaction system to 8-12, and carrying out a nucleation reaction under ultrasonic treatment; and (3) after the reaction is finished, separating the magnetic particles through an external magnetic field, alternately washing with deionized water and ethanol for 2-5 times, and carrying out vacuum drying to obtain the magnetic nano ferroferric oxide particles. The prepared magnetic nano ferroferric oxide has the particle size of 30-80nm, the saturation magnetization of more than or equal to 36emu / g, stable dispersion and the cell survival rate of more than or equal to 80%. The method solves the problems of particle aggregation, weak magnetism and complex process in the traditional method, can be used for wastewater treatment, and is economical and efficient in process and suitable for large-scale production.

This invention relates to an Fe-Ni based alloy with enhanced soft magnetic properties utilizing a medium-range ordered structure and its preparation method. The chemical formula of the alloy is: Fe bal Ni a Cr y Si b B c M d Cu e X f Its microstructure is as follows: the alloy matrix is ​​mainly amorphous, with dispersed atomic-scale medium-range ordered (MRO) clusters comprising 15%–40% by volume. The size of these clusters is controlled between 1 nm and 5 nm, and no long-range crystalline phases larger than 10 nm are formed. By introducing Ni element to couple magnetic moments with Fe to reduce the saturation magnetostriction coefficient, and by using a low-temperature relaxation annealing process to control the pre-precipitation behavior of Cu element, a high-density MRO-reinforced framework is established in the amorphous matrix. This material possesses high saturation magnetic induction, low coercivity, and excellent high-frequency permeability, which can improve the problems of large magnetostriction coefficients and high high-frequency noise in existing high-Bs iron-based nanocrystalline alloys. It is particularly suitable for high-frequency high-power transformers and wireless charging magnetic shielding modules.

The invention discloses a magnetic coupling surge protection device based on an amorphous ferrite material, which comprises an amorphous ferrite magnetic core, a secondary side inductor, a secondary side resistor, a bias conductor and a bias power supply, is nested outside a high-voltage direct-current transmission line, and forms magnetic field coupling with the high-voltage direct-current transmission line through the amorphous ferrite magnetic core in the device. When suddenly changed surge current flows through the device, a rapidly changing magnetic field is excited in the amorphous ferrite material, the magnetic field provides equivalent inductance for the high-voltage direct-current transmission line, and meanwhile, the rapidly changing magnetic field generates induced electromotive force in the bias conductor and generates induced current; the induced current generates heat loss in the process of flowing through the secondary side resistor, and surge current energy in the high-voltage direct-current transmission line is converted into the heat loss of the secondary side resistor through the process, so that surge protection is realized. The invention has the advantages of high saturation magnetic flux density, high relative permeability, excellent high-frequency performance and the like, and is suitable for the operation condition of magnetic coupling surge protection equipment.

A magnetoresistive stack may include a first electrically conductive material, a fixed region having a fixed magnetic state, a free region configured to have a first magnetic state and a second magnetic state, a dielectric layer disposed between the fixed region and the free region, a spacer region, and a cap layer disposed between the spacer region and the free region. The free region may include a layer of ferromagnetic material, an insertion layer, an iPMA layer, and / or a low saturation magnetization layer.

The invention relates to a current-doubling rectification magnetic integrated transformer. Comprising a magnetic core assembly, a primary winding and a secondary winding, the magnetic core assembly comprises a middle column and two side columns; the primary winding and the secondary winding are respectively wound on the side columns to form a closed magnetic flux loop; the middle column is made of a composite magnetic conductive material; the saturation flux density of the composite magnetic conductive material is greater than 0.5 T; the initial value of the relative permeability of the composite magnetic conductive material is relatively low and is reduced along with the increase of the load current. According to the invention, the problem that it is difficult to balance anti-saturation, filtering and quick response in a full-load range in the prior art is solved; anti-saturation, filtering and quick response in a full-load range are balanced; moreover, the composite magnetic conductive material replaces a centralized air gap, thereby facilitating the reduction of scattered magnetic flux, and further facilitating the reduction of the eddy current loss of the winding.

The invention provides a method for detecting the residual magnetic quantity of a permanent magnetic ferrite magnetic shoe. The method comprises the following steps: carrying out surface cleaning treatment on a permanent magnetic ferrite magnetic shoe to be detected; measuring the volume of the magnetic tile; peelable soft magnetic auxiliary layers are uniformly coated on the inner cambered surface, the outer cambered surface and the bottoms and the side walls of the grooves at the two ends of the magnetic tile, the relative permeability of the soft magnetic auxiliary layers is 10-100 times that of the magnetic tile body, and the spraying thickness is 0.2-0.6 mm; after the soft magnetic auxiliary layer is naturally aired, performing constant-temperature treatment on the magnetic tile; the magnetic shoe is placed in the center of a magnetizing coil, saturation magnetizing is carried out, and the magnetizing direction is consistent with the thickness direction of the magnetic shoe; stripping the soft magnetic auxiliary layer after magnetizing; a Helmholtz coil method is adopted to measure the magnetic flux of the magnetic shoe, and volume data is combined to convert the residual magnetic quantity.

The application discloses a kind of soft magnetic high-precision measurement methods and systems without standard sample traceability, belong to electromagnetic physical material performance measuring instrument and measurement and control technical field.The application calibrates the constant of detection coil by standard volt-ampere method, constructs simulation integration circuit to establish the conversion channel of induced electromotive force to voltage;Input the shape topology classification and three-dimensional geometric characteristic size of the soft magnetic sample to be measured, call soft magnetic space leakage magnetic feedback mapping library to solve morphological mismatch compensation factor;Interchange magnetic field is applied to collect original integral voltage signal, lock the characteristic time window of saturation stage, fit zero-point drift function and deduct, calculate net magnetic flux change and then enter global traceable physical equation to obtain magnetic moment.The application does not need to rely on standard sample, effectively suppresses integral drift, corrects space truncation error, improves measurement precision and universality, realizes the traceable quantitative measurement of magnetic moment of soft magnetic material.

A magnetic property acquisition unit detects an induced voltage caused by vibration of a measurement sample magnetized by an excitation electromagnet and acquires a magnetic property that indicates a relationship between a magnetic flux density and an external magnetic field. The magnetic flux density is a sum of magnetization of the measurement sample and the external magnetic field. When acquiring the magnetic property of the measurement sample to which pressure is being applied, a control device sets a first magnetic field value as a sweep start value, and performs sweeping with a magnetic field equal to or less than the first magnetic field value. The first magnetic field value is smaller than a second magnetic field value that is acquired before the pressure is applied to the measurement sample, and corresponds to a saturation magnetic flux density of the measurement sample to which the pressure is not being applied.

The invention discloses an iron-based nanocrystalline soft magnetic composite material with high saturation flux density, high frequency and low loss. The iron-based nanocrystalline soft magnetic composite material has the chemical composition of FeaCobSicBdPeCufNbg, wherein 72 < = a < = 75, 0 < = b < = 3, 0 < = c < = 9, 0 < = d < = 10, 0 < = e < = 4, 0.5 < = f < = 0.7, 1 < = g < = 1.5, and a + b + c + d + e + f + g = 100. The invention further discloses a preparation method of the iron-based nanocrystalline soft magnetic composite material. The preparation method comprises the following steps that (1) iron-based amorphous alloy powder with the target particle size is obtained based on alloy smelting and atomization powder making; (2) adding the iron-based amorphous alloy powder into an organic solvent containing organic resin, and forming an organic resin coating layer outside the iron-based amorphous alloy powder under continuous ultrasonic oscillation; after coating, drying the powder, and carrying out cold press molding to obtain a green body; and (3) carrying out transverse magnetic field heat treatment on the green body at high temperature to obtain the iron-based nanocrystalline soft magnetic composite material.

This invention provides a new energy core based on wide-width amorphous alloy strip and its preparation method, comprising the following steps: winding the amorphous alloy strip based on a tension-wound diameter linear decreasing function to form a single-frame core; splicing multiple single-frame cores along the magnetic circuit direction to form a core body; and annealing the obtained core body under a protective atmosphere to obtain a new energy core. This invention solves the key technical problems of winding, splicing, and annealing of wide-width amorphous alloy strip in the preparation of high-power new energy cores, and realizes the preparation of large-size amorphous alloy cores with low loss, high saturation magnetic induction intensity, and high structural stability.

To provide an iron-based soft magnetic alloy that possesses Bs≥1.7 T, exhibits low iron loss characteristics, and enables lamination core formation.SOLUTION: An iron-based soft magnetic alloy has a composition expressed by the formula (Fe1-mCom)100-x-ySix(B1-nCn)y, in which the composition ratios x, y, m, and n satisfy 1.0≤x≤3.0 atom%, 11.0≤y≤14.0 atom%, 0.05≤m≤0.5, and 0.0≤n≤0.3. The alloy has a metal structure composed of an α-Fe phase, with an amorphous phase of 20 vol.% or less, a saturation magnetic flux density of 1.7 T or more and 2.0 T or less, and an iron loss of 50 W / kg or less at a magnetic flux density of 1.5 T and a frequency of 1 kHz, wherein the thickness of the iron-based soft magnetic alloy is 18 μm or more and less than 40 μm.SELECTED DRAWING: Figure 2

Provided is a conveyance device that prevents magnetic saturation and reduces the weight of the conveyance device. The conveyance device of the present invention is characterized by including: a conveyance path (65) through which a conveyance object moves; an electromagnet provided on a surface opposite to a surface on which the conveyance object moves; and a drive circuit that causes a current to flow through the electromagnet, the electromagnet having a tooth (22a, 22b) made of a magnetic body and a winding (21a, 21b) wound around a surface of the tooth (22a, 22b), a yoke (26) that supports the tooth (22a, 22b) being provided, a minimum cross-sectional area (Sy) of the yoke (26) being smaller than a minimum cross-sectional area (St) of a portion of the tooth (22a, 22b) on which the winding (21a, 21b) is provided.

The invention discloses processing equipment for concrete doped with waste concrete blocks and concrete prepared through the processing equipment, and relates to the technical field of concrete processing. A concrete stirring component for preparing concrete is arranged below the conveying tail end of the concrete conveying device; the magnetic separation mechanism is arranged above the belt conveying component in a striding mode and used for adsorbing and separating ferromagnetic impurities in the concrete raw materials in the conveying process; the magnetic separation mechanism comprises a mounting frame, a collecting box and a magnetic suction assembly; and the mounting frame is fixed on the base. Through cooperative cooperation of the controller, the magneto-dependent sensor, the lifting mechanism, the overturning component and the scraper blade impurity removal component, after adsorption saturation of the magnetic attraction assembly, the processes of lifting, overturning, power-off impurity removal and resetting can be automatically completed, manual shutdown intervention is not needed, the operation process is effectively simplified, production process interruption is avoided, and continuous concrete processing is guaranteed.

This application provides a hybrid magnetic circuit and intelligent flux distribution current transformer energy harvesting device and method to solve the problems of low sensitivity for small current energy harvesting and weak resistance to large current saturation in current transformer energy harvesting devices. The device includes a hybrid magnetic circuit unit, a magnetic state detection unit, and an intelligent flux distribution unit. The hybrid magnetic circuit unit includes a first magnetic circuit and a second magnetic circuit connected in parallel and magnetically coupled. An energy harvesting winding and an auxiliary control winding are wound on the first and second magnetic circuits, respectively. The magnetic state detection unit monitors the magnetization state of the first magnetic circuit, and the intelligent flux distribution unit injects controllable current into the auxiliary control winding to adjust the flux ratio flowing through the first and second magnetic circuits. By constructing a parallel hybrid magnetic circuit and implementing active flux distribution, this application ensures that the first magnetic circuit operates in the ideal linear region under any transmission conductor current, thereby simultaneously achieving ultra-high sensitivity for small current energy harvesting and extremely strong resistance to large current saturation.