93 results about "Transverse magnetic field" patented technology

The invention provides a grounding grid topological structure detection method and device based on adaptive differential. The method comprises the following steps: obtaining a transverse magnetic field component and a longitudinal magnetic field component of an area to be detected; performing peak extraction on the transverse magnetic field component and the longitudinal magnetic field component, and performing peak-dividing fitting to obtain parameters of each peak; and constructing a differential threshold, carrying out adaptive differential based on the parameter of each wave crest to obtain a differential result, and carrying out superposition imaging on all the differential results to obtain a grounding grid topological structure of the to-be-detected area. According to the scheme, different types of magnetic field wave crests of each magnetic field observation line are identified through the KNN algorithm, and adaptive differentiation is carried out on different wave crests through a threshold value judgment mode, so that the grounding topology magnetic field characteristics of a weak peak area are remarkably enhanced.

The invention belongs to the technical field of quantum precision sensing, and particularly relates to an NV color center magnetic detection or temperature measurement method based on a zero field splitting coefficient, which is characterized in that a hypothetical magnetic field vector is calculated according to lattice structure characteristics of a diamond regular tetrahedron, and the zero field splitting coefficient is calculated according to the amplitude of the vector. Frequency deviation introduced by the transverse magnetic field is fully considered, and the accuracy is improved on the basis of the steps. Compared with an existing method, the calculated zero field splitting coefficient is more accurate, an error analysis method is provided, and magnetic field measurement or temperature measurement can be achieved through a more accurate D value by means of the method.

The invention discloses a vacuum arc extinguish chamber structure with large rated current and strong breaking capacity, which comprises a structure body, and is characterized in that the structure body comprises a static contact assembly, the static contact assembly comprises a static end arc contact and a static end main contact, and the static end arc contact is arranged in front of the static end main contact and protrudes for a preset distance d along the on-off direction; and the moving contact assembly comprises a moving end main contact and a moving end arc contact, and the moving end main contact and the moving end arc contact are located on the same plane. According to the invention, the effect that the main contact does not burn arc during breaking is realized, the contact surface of the main contact is protected from being ablated by the arc, and a physical foundation is laid for the high capacity of the vacuum arc-extinguishing chamber. The moving end arc contact is provided with a coil structure so as to generate a transverse magnetic field or a longitudinal magnetic field, and the magnetic lines of force between the static end arc contact and the moving end arc contact have the combined action of the longitudinal magnetic field and the transverse magnetic field, so that the breaking capacity is high.

The invention discloses an integrated circuit magnetic field auxiliary electroplating system which comprises electroplating equipment provided with a cathode assembly and an anode assembly which are opposite to each other; the magnetic field generator comprises a magnet N pole and a magnet S pole, the magnet N pole is arranged on one side of an anode assembly of the electroplating equipment, the magnet S pole is arranged on one side of a cathode assembly of the electroplating equipment, and the magnetic field generator generates a transverse magnetic field between the cathode assembly and the anode assembly. The invention belongs to the field of micro rapid prototyping processing, and particularly relates to a magnetic field auxiliary electroplating system for an integrated circuit. The transverse magnetic field is applied to adjust the electric field through the magnetic force, and according to the electromagnetic induction principle and the Larentz force law, liquid phase mass transfer is accelerated, the deposition speed and the limiting current density are improved, the time of reaction bubbles staying on the deposition surface is shortened, grains are refined, and the deposition quality is improved.

The invention relates to a magnetic field contact for a vacuum arc extinguish chamber and a manufacturing method of the magnetic field contact, and belongs to the technical field of vacuum switchs.The magnetic field contact comprises a contact cup, a contact and reinforcing ribs, the contact covers an opening of the contact cup and is fixedly connected with the contact cup, a spiral groove is formed in the circumferential outer wall of the contact cup, and the reinforcing ribs are arranged in the spiral groove. The spiral groove is used for forming a longitudinal or transverse magnetic field, the reinforcing rib is located in the contact cup and fixedly connected with the inner wall of the contact cup, and the outer diameter of the reinforcing rib is the same as the inner diameter of the contact cup where the reinforcing rib is located. The manufacturing process of the contact structure is reduced, and the use amount of silver-copper solder and contact materials is reduced.

The invention provides a magnetic circuit parallel moving magnetic type cylindrical linear oscillation motor which comprises an inner stator and an outer stator, a rotor is located between the inner stator and the outer stator and comprises permanent magnets, the permanent magnets are divided into a main permanent magnet and auxiliary permanent magnets, and the auxiliary permanent magnets are symmetrically arranged at the two ends of the main permanent magnet. The outer stator comprises an axial magnetic field outer stator and two transverse magnetic field outer stators, the two transverse magnetic field outer stators are symmetrically distributed at the two ends of the axial magnetic field outer stator, the inner stator annular main body, the transverse magnetic circuit outer stator annular main body and the axial magnetic field outer stator annular main body are all of circular ring structures, and the rotor is of a sleeve structure. Compared with a traditional single-phase multi-pole permanent magnet linear oscillation motor, the single-phase multi-pole permanent magnet linear oscillation motor has the advantages that the rotor permanent magnets can be utilized to the greatest extent, the output of the unit permanent magnets is improved under the condition of not increasing the mass of the rotor, and meanwhile, the overall axial length of the motor is kept unchanged, so that the problem that the output of the unit permanent magnets of the existing linear oscillation motor is not high is solved.

The invention relates to the technical field of material heat treatment, and discloses a transverse magnetic field heat treatment furnace which is characterized by comprising a rack, a vacuum pump, a hydraulic push rod, a furnace body, a circulating heat dissipation fan, a heating resistance wire, a second heat preservation layer, a magnetizing coil and a cooling fan. The circulating heat dissipation fan is connected with the top of the furnace body and extends into an inner cavity of the furnace body, the furnace body is connected with the vacuum pump through the hydraulic push rod, the heating resistance wire is wound on the outer surface of the furnace body and is of a spiral structure, the second heat preservation layer wraps the heating resistance wire and the outer surface of the furnace body, and the magnetizing coil is arranged on the outer surface of the second heat preservation layer. And the magnetizing coil is connected with the cooling fan. The temperature difference in the furnace can be reduced, the temperature uniformity in the furnace can be improved, the qualification rate of the annular magnetic core in the furnace can be increased, hot airflow can flow more uniformly in the furnace, heat accumulation is avoided, the phenomenon that the local temperature is too high or too low is reduced, and the temperature stability is improved.

In the device, a rapid vacuum switch comprises a static contact and a moving contact, the static contact and the moving contact are separated to generate plasmas, and a transverse magnetic coil abuts against the static contact and the moving contact to excite a transverse magnetic field in a contact gap so as to accelerate dissipation of the plasmas in a zero region. The transverse magnetic coils are connected in series and reused in the transfer module; the transfer module is connected in parallel with the rapid vacuum switch through the auxiliary switch; the current limiting module is connected in parallel with the transfer module. The structure can enhance the post-arc medium recovery capability of the quick vacuum switch, improves the reliability of quick breaking of fault current of a generator source, has the advantages of strong breaking capability, high breaking speed, complete environmental friendliness and the like, and can meet the operation requirements of a large power generation system.

The present invention belongs to the field of atmospheric pressure glow discharge and relates to a low-temperature plasma processing device controlled by a transverse magnetic field. The device comprises a power supply unit, a discharge unit with a built-in high-voltage spike electrode, an annular ground electrode, and an electromagnetic coil, a gas unit, a gas control unit, a magnetostrictive unit, and a sample unit for holding a treatment liquid or collecting gaseous products processed in the discharge unit. The discharge end of the high-voltage spike electrode is a pointed tip, and the radially inner side of the annular ground electrode is prefabricated with an axially symmetrical cut angle. A magnetic core is provided on the inner surface of the outer cylinder, and the magnetic core includes a first annular magnetic core and a second annular magnetic core. The device improves the efficiency of generating high-energy active particles in the low-temperature plasma by significantly increasing the discharge area. It can either utilize the discharge process of a specific dielectric gas to generate high-energy active particles for subsequent liquid treatment, or directly mix the gas to be treated with the dielectric gas in a certain proportion in the gas unit and then complete the treatment directly in the discharge unit.

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.

The invention discloses an atomic magnetometer longitudinal magnetic field interference resisting method and system based on zero offset point control, and the method comprises the steps: building a system response model containing a zero offset error, and respectively setting the zero offset points of first harmonic and second harmonic response signals as closed-loop control targets of x-axis and y-axis magnetic fields; and the output response of the double-loop closed-loop feedback control system is stabilized at a zero offset point, so that the interference of longitudinal magnetic field fluctuation on transverse magnetic field measurement is isolated in principle, and the real-time decoupling measurement of the transverse magnetic field to be measured is realized. The problem that quasi-static and dynamic longitudinal magnetic field interference cannot be suppressed at the same time in the prior art is solved, and the device has the advantages of being completely free of longitudinal magnetic field interference, biaxial decoupling measurement and long-term stable work.

The invention relates to a device for improving the through-flow arc control of a high-voltage large-capacity gas gap switch, and the device comprises a test cavity which is used for providing a controllable gas insulation environment and serves as a carrier of a high-voltage large-current discharge test; the trigger discharge loop is used for generating a high-voltage pulse to drive the trigger cavity to generate plasma jet and induce the main gap to be broken down and conducted at a preset moment; and the large current generation loop is used for storing energy and generating a high-energy fault current simulating an actual working condition after the main gap is conducted. A main gap can form a stable and controllable initial discharge channel under high-voltage and large-gap conditions, active constraint is carried out on an arc movement track in a high-energy fault current flowing stage, and long-term residence of an arc root in a local area of an electrode is avoided, so that the ablation degree of the electrode is remarkably reduced, the through-flow life is prolonged, and meanwhile, the service life of the electrode is prolonged. A transverse magnetic field generated by the spiral groove structure enables an electric arc to rotate along the surface of the electrode, the stability of an arc column is effectively improved, and the reliability under the condition of large current flow is improved.

The SERF gyroscope multi-parameter in-situ measurement method based on transverse magnetic field resonance first measures the amplitude-frequency characteristic curve of SERF atomic spin gyroscope Bx, By alternating current magnetic field response, then finds the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions respectively, and finally constructs an equation through the ratio of the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions, and obtains the accurate values of the electron magnetic field, the slowing factor and the electron transverse relaxation rate through the global optimization function algorithm. The present application can realize the in-situ accurate measurement of the electron magnetic field, the nuclear magnetic field, the electron polarizability, the nuclear polarizability, the slowing factor and the electron transverse relaxation rate of the SERF atomic spin gyroscope without changing the system state.

The present application relates to a kind of medium voltage DC hybrid circuit breaker in vacuum mechanical switch high arc voltage implementation method, based on the basic principle of natural commutation of DC breaking, form arc voltage promotion method, propose the overall technical scheme based on high arc voltage vacuum fast mechanical switch, provide theory and technical basis for the research and development of natural commutation type medium voltage DC circuit breaker, engineering application.Through external transverse magnetic field (external transverse magnetic field, ETMF) to make up for the shortage of its own magnetic field.When vacuum switch is directly used for low voltage DC breaking, external transverse magnetic field control plays a crucial role.The effect of transverse magnetic field on vacuum arc is to improve the voltage of vacuum arc, force the current of DC loop to zero, thereby realizing the DC breaking of vacuum switch.Improve the rapidity and reliability of current transfer, expand the application scenario of natural commutation mode, improve the arc voltage of fast mechanical switch, improve commutation and breaking performance.

An aspect of the invention includes an optimization unit configured to perform optimization, by stochastic calculation, on a Hamiltonian of a quantum annealing model, which is an Ising model representing the optimization target in a state in which a transverse magnetic field is applied, in which the optimization unit performs the optimization by executing a series of formulas satisfying a state update condition, which is a condition related to an update of a spin state, until a predetermined end condition is satisfied, and the state update condition includes a first condition representing the spin state, a second condition representing a relationship between the spin states obtained at different times, a third condition representing a relationship between adjacent trotter layers, and a fourth condition including an amount representing an intensity of an interaction between the same or different spins existing in the same trotter layer, an amount representing a magnitude of energy of a spin itself, and an amount representing an intensity of an interaction between spins belonging to different trotter layers.

The utility model discloses a quenching coupling ultrasonic vibration double magnetic field auxiliary electric arc material adding device which comprises a control system, a mechanical arm and a material adding unit fixed at the tail end of the mechanical arm, the material adding unit comprises a base plate and a welding gun, and the material adding unit further comprises a liquid nitrogen spray gun, a longitudinal magnetic field device, a temperature sensor, a transverse magnetic field device and an ultrasonic vibration instrument. The liquid nitrogen spray gun is arranged above the substrate; the transverse magnetic field device is arranged on the side edge of the welding gun and used for controlling the electric arc through a generated magnetic field so as to adjust gas flow and the molten pool form in the material adding process. The longitudinal magnetic field device is arranged around the welding gun and used for controlling molten pool flowing and component homogenization through a generated magnetic field so as to improve the additive forming quality and performance; and the ultrasonic vibration meter is arranged below the substrate. According to the utility model, the mixing and uniformity of components in the molten pool can be promoted, the segregation defect is avoided, and further refining of crystal grains is realized, so that the additive forming quality and performance are improved.

The present application discloses a magnetic control coil, comprising: a coil support structure and N pairs of coil assemblies, wherein the coil assemblies are arranged in a planar manner along the surface of the coil support structure; N is an integer not less than 1. The present application employs a plurality of surface-type coils to replace conventional rectangular cross-section circular, racetrack-shaped, or saddle-shaped coils, which can enhance the generation efficiency of transverse magnetic fields, thereby effectively suppressing the introduction of impurities and the generation of defects during crystal manufacturing processes and improving the efficiency and quality of crystal manufacturing.

The embodiment of the invention provides a rotating magnetic field device suitable for a cathode arc target and a multi-arc ion plating device, the rotating magnetic field device comprises a bottom shell, the bottom wall of the bottom shell is provided with a sleeve protruding towards the interior of the bottom shell, and the sleeve is provided with a sleeve hole used for containing the arc target; the rotating frame and the sleeve hole are concentrically arranged, the rotating frame is arranged on the periphery of the sleeve in a sleeving mode, and the rotating frame is rotationally connected with the bottom shell; the annular transverse magnetic field structure is arranged on the periphery of the rotating frame in a sleeving manner; and the driving structure is arranged on the bottom shell and is in transmission connection with the rotating stand, and the driving structure is configured to drive the rotating stand to rotate around an arc target in the bottom shell.

The present invention belongs to the field of magnetic field heat treatment technology, and discloses a magnetic field heat treatment furnace and a heat treatment method. The magnetic field heat treatment furnace can generate a transverse magnetic field and / or a longitudinal magnetic field according to production needs by arranging a second magnetic field generating device and / or a third magnetic field generating device on a material rack assembly, and combining with a first magnetic field generating device in the furnace body, thereby overcoming the limitation that a traditional magnetic field heat treatment furnace can only provide a single-direction magnetic field, so that the workpiece to be processed is magnetized in a more complex magnetic field environment, effectively improving the optimization space of the performance of the workpiece to be processed; the loading and unloading device includes a material rack assembly and a conveying assembly, and the material rack assembly can not only carry the workpiece to be processed, but also be locked with the furnace body and used as a furnace door, making the structure more compact, and through the coordinated movement of the conveying assembly and the material rack assembly, the loading and unloading process is simplified, making the loading and unloading process more simple and efficient, especially suitable for large-scale industrial production, and significantly improving production efficiency.

The embodiment of the invention provides an indoor magnetic field data prediction method and device based on a double-circulation LSTM neural network. The method comprises the steps of collecting magnetic field intensity sequence data; performing transverse feature extraction and longitudinal feature extraction on the magnetic field intensity sequence data through a double-circulation LSTM neural network; carrying out feature splicing and weighted fusion on the extracted transverse features and longitudinal features based on a self-adaptive gating mechanism to obtain dynamic gating fusion features; mapping the dynamic gating fusion feature into a three-dimensional magnetic field value through a full connection layer to obtain a magnetic field prediction result; wherein the magnetic field intensity sequence data comprises transverse magnetic field intensity sequence data representing magnetic field changes of adjacent sampling points in the same floor, and longitudinal magnetic field intensity sequence data representing magnetic field changes of the same sampling point across floors in different floors; the method can effectively improve the precision and efficiency of multi-floor magnetic field prediction, and is suitable for the field of indoor positioning.

The invention relates to the technical field of metal materials, and discloses a high-temperature-resistant high-permeability nanocrystalline soft magnetic alloy strip for a switch cabinet and a preparation method of the high-temperature-resistant high-permeability The preparation method comprises the following steps that S1, Si, B, Nb, Mo, Cu and Fe are taken as raw materials and smelted, molten steel obtained after smelting is sprayed to a copper roller which is provided with a quenching device and rotates at a high speed, and a basic strip is prepared; s2, under a transverse magnetic field, tensile force is applied to the basic strip in the longitudinal direction, annealing is conducted, and a nanocrystalline soft magnetic alloy base material is obtained; s3, the SiO2 sol and the Al2O3 sol are mixed to obtain mixed sol, the surface of the nanocrystalline soft magnetic alloy base material is coated with the mixed sol, heat preservation and sintering are conducted, and the high-magnetic-conductivity nanocrystalline soft magnetic alloy strip is obtained; and S4, the surface of the high-magnetic-conductivity nanocrystalline magnetically soft alloy strip is coated with a damp-heat-resistant coating, curing is conducted, and the high-temperature-resistant high-magnetic-conductivity nanocrystalline magnetically soft alloy strip is obtained.

The invention relates to a double-break isolating switch, which comprises a shell, the shell is also internally provided with a magnetic field control mechanism which is used for constructing a transverse magnetic field between the expansion side fracture and the operation side fracture so as to prevent charged particles after arc extinguishing from axially migrating to the other fracture in the double-fracture isolation switch to cause breakdown. The magnetic field control device is additionally arranged in the air chamber of the double-fracture isolation switch, so that a transverse magnetic field is constructed between the expansion side fracture and the operation side fracture, charged particles after arc extinguishing are prevented from axially migrating to the other fracture in the double-fracture isolation switch to cause breakdown, and the situation that in the non-power-cut expansion operation or test period, the breakdown of the double-fracture isolation switch is caused is effectively avoided. The potential breakdown condition of the extension side fracture leads to the diffusion of charged particles to the operation side fracture, thereby ensuring that the insulating property of the operation side fracture is not affected and the safe and stable operation of the operation side bus under the condition of uninterrupted power supply is ensured. According to the invention, the overall reliability and operation stability of the double-break isolation switch can be significantly improved.

A wireless charging module, an electronic device, and a charger. The wireless charging module includes a charging coil and a magnetic attachment apparatus. A magnetic attachment apparatus includes a plurality of magnetic attachment units where each one includes a first and a second assembly, and the first and the second assembly are disposed on a same surface in a first direction. The first assembly includes a plurality of magnets those magnetic field directions of which are parallel and opposite to each other, so that lateral magnetic fields cancel each other out, to weaken a magnetic field radiated around or to an inside by the magnetic attachment apparatus. Therefore, a soft magnetic material can be omitted or reduced. An enhancement in magnetic field strength on a side of the magnetic attachment apparatus leads to better limit a location of contact between the electronic device and the charger.

The invention discloses a high-entropy amorphous alloy sensor with high sensitivity and high Curie temperature and a preparation method of the high-entropy amorphous alloy sensor, and the high-entropy amorphous alloy sensor comprises the following components in atomic percent: 25-30% of Co, 25-30% of Fe, 15-25% of Ni, 10-15% of Si, 10-15% of B, 1-2% of Cu, 1-2% of Nb and 1-2% of Mo. The preparation method comprises the following steps: proportioning the alloy in proportion, repeatedly melting the alloy in a vacuum induction heating furnace for at least five times to ensure uniform components, preparing an amorphous ribbon through a vacuum single-roller rotary quenching and jet casting system, and preparing the amorphous ribbon into the sensor through photoetching and corrosion methods. And the prepared sensor can be used in the fields of biomedical detection, magnetic signal detection and the like.

A transverse magnetic field configuration optical system for a high magnetic field Fourier transform infrared (HFT) spectrometer includes a tubular sample cavity containing a solenoid superconducting magnet for the HFT spectrometer, and a non-magnetic damping sleeve housed within the tubular sample cavity. The upper part of the non-magnetic damping sleeve houses a non-magnetic mirror-plated gold-coated optical waveguide, and the lower part houses a transverse magnetic field configuration optical module. The transverse magnetic field configuration optical module contains an adjustable sample support stage, which is connected to a decelerated stepper motor outside the transverse magnetic field configuration optical system. The non-magnetic mirror-plated gold-coated optical waveguide includes an input waveguide for the probe light and an output waveguide for the signal light. The transverse magnetic field configuration optical module comprises a transverse magnetic field configuration reflection module and a transverse magnetic field configuration transmission module, respectively adapted to different HFT Fourier transform infrared spectroscopy measurement requirements. This invention proposes an optical system capable of realizing transverse magnetic field configuration magnetic spectroscopy measurements.

A transverse magnetic field contact for a vacuum arc-extinguishing chamber comprises a contact body, the contact body is provided with an arcing surface and an assembling surface, the arcing surface is provided with a plurality of rotating arc grooves which are uniformly distributed in the circumferential direction of the contact body and are arranged in a penetrating mode, and the contact body is allowed to be in a'hot wheel 'structure through the plurality of rotating arc grooves. The arc rotating grooves are formed in the arc burning surface, contact fingers matched with the arc rotating grooves in number are obtained, the arc moving direction is defined by the arc rotating grooves and the contact fingers, continuity is achieved in the moving direction, and groove edges used for being connected with the arc grooves and guiding part of the arc into the arc grooves are formed on the arc burning surface of the contact fingers. And surface edges which are used for connecting the peripheral surface of the contact finger and guiding part of electric arc to the peripheral surface of the contact finger are formed on the arcing surface and the assembling surface of the contact finger. The beneficial effects of the utility model lie in that the static state of the electric arc is reduced, the damage caused by the continuous burning of the electric arc to the arcing surface is reduced, the utilization rate of the arcing surface is also improved, and the whole contact body is really and uniformly covered.

The invention provides a magnetic control multi-pose electric arc additive manufacturing defect suppression method and device in any direction. According to the method, a composite magnetic field generating device and a camera assembly are integrated on a welding gun, side and front images of a molten pool are obtained through a camera, the geometric dimension of the molten pool is calculated, and equivalent gravity of the molten pool is obtained. And a forming path and a space pose are planned according to the three-dimensional model of the to-be-formed component, and an included angle between the positive direction of the axis of the welding gun and the gravity direction is used for representing a pose inclination angle. Transverse excitation current and longitudinal excitation current are calculated according to the pose inclination angle and equivalent gravity of the molten pool, the excitation current is loaded to a transverse excitation channel and a longitudinal excitation channel to form a transverse and longitudinal composite magnetic field, and the transverse magnetic field and the arc current act to generate electromagnetic force to support and restrain the molten pool; the longitudinal magnetic field is used for weakening arc deflection interference, and therefore the problems that in the multi-pose arc additive manufacturing process in any direction, a molten pool droops and falls off due to the gravity effect are effectively solved.

The present invention provides an induction heating system and heating method with alternating transverse and longitudinal magnetic fields, defining a channel for a slab to pass through as a slab channel, and the induction heating system includes a first induction heating unit and a second induction heating unit arranged alternately in the running direction of the slab; the first induction heating unit includes K1 first inductors for generating a transverse magnetic field with a magnetic field direction perpendicular to the surface of the slab, thereby heating the slab located on the slab channel; the second induction heating unit includes K2 second inductors for generating a longitudinal magnetic field with a magnetic field direction parallel to the surface of the slab, thereby heating the slab located on the slab channel. The heating system with alternating transverse and longitudinal magnetic fields of the present invention can effectively reduce the temperature deviation between the corners and the surface of the slab.

The invention discloses an asymmetric longitudinal and transverse magnetic composite contact structure and a vacuum arc-extinguishing chamber. The contact structure comprises a static contact and a moving contact. The static contact comprises a central conductive base, a spiral conductive structure and a first conductive contact part; the central conductive base is used for connecting a static conductive rod; the spiral conductive structure is connected between the central conductive base and the first conductive contact part and is configured to generate a longitudinal magnetic field at the first conductive contact part when current flows through the spiral conductive structure; the moving contact comprises a second conductive contact part and is electrically connected with the moving conductive rod; each of the first conductive contact part and the second conductive contact part comprises a central connecting part and a plurality of conductive arms extending outwards in the radial direction from the central connecting part; and the spiral conductive structure of the static contact is configured to generate a transverse magnetic field when current flows between the conductive arm of the first conductive contact part and the corresponding conductive arm of the second conductive contact part. According to the invention, a more suitable magnetic field can be generated according to the arc position during breaking, and the reliability and operation safety of breaking are improved.

The application discloses a kind of vacuum circuit breaker contact between phase interphase transverse magnetic field measurement method, system and medium.The method comprises: establishing vacuum circuit breaker three-phase model;The magnetic field space-time distribution of each phase of three-phase model and contact plane when current is applied is calculated;Remove the influence of transverse magnetic field generated by conductive rod, and calculate the self-generated magnetic field distribution of each single phase when only current is applied on the single phase;The applied transverse magnetic field of the phase is obtained by subtracting the self-generated magnetic field distribution of each single phase when only current is applied on the single phase from the magnetic field space-time distribution of each phase of three-phase model and contact plane when current is applied.Through the method, the transverse magnetic field applied on the contact between a certain phase of vacuum circuit breaker three-phase by the conductive rod of the other two phases and the phase can be more accurately obtained, which is conducive to further optimizing the three-phase space structure arrangement and contact magnetic field design, accurately mastering the arc ablation characteristics and breaking performance of vacuum circuit breaker, and optimizing the arc-extinguishing strategy and shielding scheme of vacuum circuit breaker.