57results about How to "Reduce magnetic induction" patented technology

The invention discloses an ion thruster discharge chamber magnetic pole structure which comprises a lower magnetic pole (1), a middle magnetic pole (2), an upper magnetic pole (3), a lower pole shoe (4), a middle pole shoe (5) and an upper pole shoe (6). The lower pole shoe (4), the middle pole shoe (5) and the upper pole shoe (6) are correspondingly connected with the lower magnetic pole (1), the middle magnetic pole (2) and the upper magnetic pole (3). The structure further comprises permanent magnets (9 and 10). A magnetic force line loop is formed among the magnetic poles through the pole shoes (4, 5 and 6) and the permanent magnets (9 and 10). A loop tip cusped magnetic field is formed in a discharge chamber. The structure is characterized in that positive pole cylinders (7 and 8) of the discharge chamber are arranged in the cusped magnetic field, all the magnetic poles extend to the inner surfaces of the positive pole cylinders (7 and 8) and are charged with negative electricity relative to the positive pole cylinders (7 and 8), and a discharge chamber negative pole (11) installed on the lower pole shoe (4) directly extends into the discharge chamber under the circumstance without the positive pole cylinders ahead. The invention further discloses a design method for the ion thruster discharge chamber magnetic pole structure. When the structure is used, the primary electron utilization rate can be increased, and the discharging efficiency and the beam uniformity are improved.

The invention discloses a high-voltage wire magnetic field induction energy taking device for high-voltage transmission line online monitoring. The device comprises a coil (1), a rectification circuit (2), a switching circuit (3), a control circuit (4) and an energy storage circuit (5), wherein the coil is sleeved on a high-voltage wire; alternating current is induced from the high-voltage wire and is fed to the rectification circuit by utilizing the electromagnetic induction principle, the alternating current is converted into direct current through the rectification circuit and charges the energy storage circuit, and the switching circuit (3) is connected in parallel at the output end of the rectification circuit (2); and the control circuit detects output voltage of the energy storage circuit, so that the on / off of the switching circuit is controlled, and the energy storage circuit outputs voltage and current. The application range of the energy taking device is reduced, and the power loss of the switching circuit is reduced; because the switching circuit is positioned in a switch-on state for a long time in actual use, and the magnetic induction intensity in a magnetic core of the coil is low, the power loss of the magnetic core is reduced; and because the whole power loss of the energy taking device is reduced, the service life of the device is prolonged, and the stability and the reliability of the device are greatly improved.

The invention relates to a dual-power electromagnetic head, which comprises coils, a moving iron-core, a static iron-core, a plunger tube and a coil circuit, wherein the coils are round the outside of the plunger tube, the static iron-core is fixedly arranged on the upper part of a tube hole of the plunger tube, the moving iron-core is arranged below the static iron core and is in clearance fit with the pipe hole of the plunger tube, the quantity of the coils is preferably two, and the coils are respectively a holding coil and a starting coil, the winding directions of the starting coil and the holding coil are consistent, the quantity of power supply output ends of a control integration is two, and the power supply output ends of the control integration are respectively connected with a connecting rod of the holding coil and the starting coil, when the valve is started, the two coils are synchronously powered on, and only the holding coil is powered on after the valve is started stably. The dual-power electromagnetic head has the advantages of good safety, little temperature rise and low energy consumption, and is suitable for various kinds electromagnetic valves, especially an electromagnetic valve with high-power and / or large-caliber.

A magnetic core includes an ellipse-shaped central post and two side posts. The ellipse-shaped central post includes a long axis and a short axis. The length of the long axis is greater than the length of the short axis. The two side posts are disposed on two sides of the ellipse-shaped central post and opposite to each other. The two side posts are connected with the ellipse-shaped central post through two connecting portions respectively for defining at least one winding space with the ellipse-shaped central post. By utilizing the ellipse-shaped central post, the volume of the winding space is increased, the diameter of the wire of the winding coil can be increased, the temperature of the winding encapsulation is easy to be lowered, the over-volume issue of the winding encapsulation is avoided, and the safe distance between the bobbin and the winding encapsulation is increased, so that the present disclosure meets the safety regulation.

The invention discloses an Ansys Maxwell software-based electromagnetic induction characteristic simulation analysis method, and belongs to the simulation analysis field. The Ansys Maxwell software-based electromagnetic induction characteristic simulation analysis method comprises the following steps: S1, carrying out pretreatment comprising model building, model material characteristic endowing, grid dividing, boundary condition applying and excitation source applying, analysis preparation and feasible checking; S2, performing parameter setting comprising setting parameters such as a convergence step number, a simulation step length and a fault-tolerant percentage before simulation, setting a solution option and performing simulation after setting; and S3, checking a calculation result of a magnetic force line and magnetic induction intensity through a post-processing module after simulation is finished. The analysis method is more scientific and reasonable, the Ansys Maxwell is used for establishing an electromagnetic field numerical simulation model of a densely-wound solenoid cylinder, simulation analysis is conducted on the induced magnetic field in the body tube under different external excitation frequencies, and the change rule of the magnetic field in the cylinder under different excitation frequencies is obtained.

The invention discloses a passive sensor and a sensing method thereof. The passive sensor comprises a shell, sensitive components, a printed board, outer leads and a sealing material, wherein the sensitive components are arranged in the shell; the sensitive components are connected with the three outer leads electrically by the printed board; the three outer leads are respectively two output ends U1 and U2 and a grounding end G of the sensor; the port of the shell is encapsulated by using an epoxy resin sealing material; the sensitive components comprise sensitive wires, enamelled wire windings and a framework; the framework is cross-shaped; the sensitive wires are embedded into through holes of the framework; the enamelled wire windings are respectively wound on the four arms of the framework; and the enamelled wire windings wound on the same sensitive wire are connected in series to form the induction coil of the wound sensitive wire. The passive sensor performs two types of sensing such as rotary counting and direction identification at the same time, performs the rotary counting on pulses according to the time sequence characteristics of electrical pulses, and performs the rotary counting and the rotary direction identification on an object at the same time according to the time sequence characteristics of the electrical pulses.

The magneto-optical modulator is formed from D.C. magnetic field coil, modulation magnetic field coil, constant temperature cabinet, polarization prisms and rotatory material, in which the cylindrical rotatory material exterior is covered with cylindrical constant temperature cabinet, and the exterior of the cylindrical constant temperature cabinet is covered with cylindrical modulation magnetic field coil and D.C. magnetic field coil successively, and two ends of the cylindrical rotatory material are equipped with a pair of orthogonal polaroids, and the rotatory material adopts the atomic vapor bubble of one of sodium, potassium and cesium.

The invention discloses a molding device for directional steel fiber reinforced ultrahigh-performance concrete and an application method of the molding device and relates to the molding device for the directional steel fiber reinforced ultrahigh-performance concrete and the application method of the molding device. The invention aims to solve the problem that an existing method has high requirements on magnetic induction intensity during the control on directional distribution of steel fibers, the lower layer of steel fibers rotate hardly because of the pressure from the upper layer of concrete, so some steel fibers are distributed disorderly and most of the steel fibers cannot be uniformly distributed in one direction. The molding device for the directional steel fiber reinforced ultrahigh-performance concrete consists of a direct-current power supply, a piston, a push rod, a first switch, a feeding cylinder, a second switch, a cylindrical flow passage, a corner flow passage and a circular platform-shaped flow passage. By utilizing the effects of thrust, a magnetic field and a baffle, the molding device disclosed by the invention is capable of realizing directional distribution of the steel fibers for ultrahigh-performance concrete and is capable of improving the directional distribution effect and the pouring speed of the steel fibers. The molding device disclosed by the invention is applicable to pouring of cement base materials such as ultrahigh-performance concrete.

The invention provides a magnetic field shielding device for machining of a permanent magnet rotating shaft. A permanent magnet rotor comprises the permanent magnet rotating shaft, a permanent magnet, and an iron core, wherein the permanent magnet rotating shaft is sleeved by the permanent magnet and the iron core, the permanent magnet rotor is sleeved by the magnetic field shielding device, a silicon steel sheet layer is arranged in the magnetic field shielding device, and a gap is formed between the silicon steel sheet layer and the permanent magnet rotor. The magnetic field shielding device provided by the invention has the advantages that the outer side of the permanent magnet rotor is sleeved by the silicon steel sheet layer, and the gap is formed between the silicon steel sheet layer and the permanent magnet rotor, so that the magnetic induction intensity outside the silicon steel sheet layer can be greatly attenuated, a magnetic field generated by the rotor can be further shielded, and the processing precision and quality for the permanent magnet rotating shaft and the three-coordinate loss measurement precision are improved.

This invention relates to a high permeability Rogowski coil with air gap iron core including a framework and a secondary winding, in which, the framework is composed of the iron core with air gap opened with at least one gap, the secondary winding is distributed on the framework uniformly and leads out two inductive potential terminals, the coil takes the air gap core as the framework to increase relative magnetic permeability, the uniform distribution of air gaps reduces leakage greatly and secures the constancy of relative magnetic permeability, since the magnet inductive strength of the core is uniform and the ability of anti-interference to outside magnetic fields is strong, the distribution of the windings of the secondary winding needs approximately uniform only so to simplify the production of secondary windings.

Provided is a transportation system comprising (a) a ground-based powered tug vehicle, (b) an airborne vehicle, and (c) a towline with end links connecting the ground-based vehicle and the airborne vehicle. Also provided are methods of transportation utilizing the transportation system.Additionally provided is a transportation system comprising a hybrid vehicle that is propelled on a highway by a linear induction electric motor comprising a stationary motor element (“stator”) and a moving motor element (“rotor”), where the stator is incorporated into a groove in the highway and the rotor is incorporated into the hybrid vehicle and protrudes into the groove in the highway; and where the hybrid vehicle further comprises at least one wing that elevates the hybrid vehicle when propelled to a take-off speed on the highway. Methods of transportation utilizing this hybrid vehicle transportation system are further provided.

The invention belongs to the technical field of surface finishing processing of mechanical parts, in particular to a magnetic grinding tool finishing processing device and method with an adjustable magnetic field and a self-adaptive aperture. The magnetic grinding tool finishing processing device comprises a magnetic field generating device and a self-adaptive aperture mechanism capable of changing the diameter, the self-adaptive aperture mechanism is arranged on the peripheral side of the magnetic field generating device, and the self-adaptive aperture mechanism and the magnetic field generating device are arranged on the inner side of the workpiece to be machined. The magnetic grinding tool finishing processing device can be subjected to finishing processing on the inner hole surface ofthe magnetic material and the non-magnetic material, the whole processing device is simple in structure, simple in process, good in economic benefit and easy to widely apply.

The invention discloses high-grade non-oriented electrical steel which comprises the following elements in percentage by mass: less than or equal to 0.0030% of C, 2.80-3.05% of Si, 0.20-0.30% of Mn, less than or equal to 0.020% of P, less than or equal to 0.0015% of S, 0.50-0.65% of Al, less than or equal to 0.0030% of N, 0.041-0.064% of Sn, less than or equal to 0.05% of Cr, less than or equal to 0.03% of Cu, less than or equal to 0.002% of V, less than or equal to 0.002% of Ti, less than or equal to 0.002% of Nb, less than or equal to 0.002% of Mo and the balance of Fe and inevitable impurities. The invention further discloses a preparation method of the electrical steel. The chemical components of the electrical steel are precisely controlled, the process is optimized, the high-grade non-oriented electrical steel with excellent performance is obtained, the iron loss P1.5 / 50 of the electrical steel is smaller than or equal to 2.70 W / kg, the magnetic induction B5000 of the electrical steel is larger than or equal to 1.69 T, and the performance requirements of large and medium-sized motor iron cores are met.

The invention relates to an enhanced piezomagnetic shoe energy collecting device. A mounting shaft is arranged to approach the left side of the middle part of the inner side of a pedestal and is surrounded by a recession part. Two pressing rod shaft supports are arranged at the left side wall of the pedestal; and a piezomagnetic magnet yoke is embedded into the bottom recession of the inner side of the pedestal and is fixed at the lower bottom of the pedestal. the piezomagnetic magnet yoke has an up-down symmetric structure; circular stepped holes are formed in the upper part and the lower part; small holes cooperate with the mounting shaft arranged at the pesetal at the outer side; and a cylindrical permanent magnet is installed between large holes at the inner sides of the two circular stepped holes of the piezomagnetic magnet yoke and the inner hole of the cylindrical permanent magnet cooperates with the mounting shaft arranged at the pesetal. An enamel-covered copper coil winds around the shaft between the upper and lower parts of the piezomagnetic magnet yoke and the two leading-out ends of the coils are connected with an energy collecting circuit. A pressing rod is fixed to the pressing rod shaft supports of the pedestal by a pressing rod shaft and is in contact with the upper surface of the mounting position of the piezomagnetic magnet yoke. The enhanced piezomagnetic shoe energy collecting device has advantages of high energy conversion efficiency, high structure reliability, and simple mounting.

The invention discloses a vibration power generation device of an automobile. The device comprises a hollow induction coil mechanism and a permanent-magnet telescoping mechanism, wherein the permanent-magnet telescoping mechanism can move to and fro along a central axis direction of the induction coil mechanism; the telescoping direction of the permanent-magnet telescoping mechanism is arranged along the central axis direction of the induction coil mechanism; a plurality of permanent magnets are arranged on the permanent-magnet telescoping mechanism; during the telescoping of the permanent-magnet telescoping mechanism, the permanent magnets can be far away from each other or close to each other to generate magnetic fields with different sizes; a limiting stop which can be in contact with atelescoping end of the permanent-magnet telescoping mechanism is arranged right above the telescoping end of the permanent-magnet telescoping mechanism; and the limiting stop is fixedly connected with a frame of the automobile. According to the device, stable induction current can be output all the time to charge storage batteries, so that the condition that the storage batteries cannot be charged as the vibration amplitude is too small is avoided, and the damages caused to charging systems as the induction current output is too large when the vibration amplitude is too large are avoided.

The invention discloses a shafting transverse vibration large force value inertia type electromagnetic active control device. The device comprises a magnetic conductive shell, an upper end cover, a lower end cover, a wire frame, a spring radial fixing piece, a coil, magnetizers, a non-magnetic-conductive main rod, permanent magnets, a compression spring and a base, wherein the upper end cover and the lower end cover are fixed to the two ends of the magnetic conductive shell, and the wire frame, the spring radial fixing piece, the coil, the magnetizers, the non-magnetic-conductive main rod, the permanent magnets and the compression spring are arranged in the magnetic conductive shell. The base is fixed on the lower end cover. The main rod, the permanent magnets and the magnetizers form a rotor. The main rod is located on the central axis of the magnetic conductive shell, and two ends of the main rod are rotationally connected with the upper end cover and the lower end cover through bearings respectively. The permanent magnets and the magnetizers are alternately arranged on the outer side wall of the main rod in the axial direction of the main rod, the magnets located at the two ends are the magnetizers, the same poles of the adjacent permanent magnets are opposite, and the permanent magnets and the magnetizers located at the two ends of the permanent magnets form a closed magnetic circuit through the magnetic conductive shell. According to the device, the mover output force and the shafting vibration direction are opposite and the frequency is the same by adjusting the electrifying frequency and direction of the coil, so that the shafting transverse vibration is controlled.

The invention is a magnetic yoke and an optical read-write head drive arm using the magnetic yoke. And the magnetic yoke is U-shaped and comprises a bottom wall, a first side wall and a second side wall, where the first side wall comprises a middle region whose permeability is lower than that on its edge, and the optical read-write head comprises a base, an objective seat, a voice coil motor and a hanging system, where the objective seat is provided with a round opening, the voice coil motor comprises a pair of magnetic yokes, a pair of magnets, a focusing coil and several tracking coils, and the hanging system comprises several strings and a fixed piece, where one end of the string is fixed to the objective seat and the other end is fixed to the fixed piece, and the fixed piece is fixed with the base. And the invention makes internal magnetic field of the magnetic yoke more distributed more uniformly and makes the coil bear force more stably.

A free-end magnetic circuit adjusting cantilever beam vibration energy collecting device is disclosed. One end of a cantilever beam is inserted into and is fixedly arranged on the fixing end of the cantilever beam. The cross section of the cantilever beam is in a rectangular shape. The tail of the cantilever beam is provided with a counterweight. Two cantilever beam magnet yokes are installed andfixed on the counterweight. A permanent magnet fixing end is close to the free end of the cantilever beam. The fixing end of a permanent magnet is horizontally and symmetrically installed and fixed with a left permanent magnet yoke and a right permanent magnet yoke. A gap is arranged between the left permanent magnet yoke and the right permanent magnet yoke. One side of the left permanent magnet yoke and one side of the right permanent magnet yoke, which are close to the cantilever beam, are provided with two coil supports which are vertically distributed respectively. The left permanent magnet yoke and the right permanent magnet yoke are installed with the permanent magnets. An induction coil is wound on the installation shaft of the two coil supports in each of the left permanent magnetyoke and the right permanent magnet yoke. The two leading-out terminals of the induction coil are connected to an energy collecting circuit. In the invention, energy conversion efficiency is high andvibration damping is small.

The invention discloses a metal abrasive particle magnetic field anti-interference device. The device comprises a sensing part, an inner shielding layer, a middle shielding layer and an outer shielding layer; the sensing part is arranged in the inner shielding layer; the inner shielding layer is arranged in the middle shielding layer; the middle shielding layer is arranged in the outer shielding layer. According to the device of the invention, multiple different shielding materials are combined to be used, so that the magnetic shielding efficiency of a system can be enhanced; and the influenceof an external interference magnetic field is shielded while an internal magnetic field is protected.

The invention provides a computer hardware maintenance and detection device, wherein a fixed base is fixedly mounted on the upper surface of the worktable; a storage battery is mounted in the worktable; an air pump is arranged on the left side of the storage battery in the workbench; an air storage tank is arranged above the storage battery and the air pump in the workbench; first mounting slidinggrooves are formed in the left side and the right side of the upper surface of the workbench correspondingly. And second mounting sliding grooves are formed in the front portion and the rear portionof the upper surface of the fixing base correspondingly, second connecting sliding blocks are slidably connected to the interiors of the left side and the right side of the fixing base correspondingly, first connecting sliding blocks are slidably connected to the interiors of the first mounting sliding grooves, and first sliding resistors are embedded into the lower ends of the first mounting sliding grooves. According to the computer hardware cleaning device, the cleaning speed of computer hardware can be increased, directional flowing airflow is formed in the cleaning cylinder cover throughthe connecting air pipe and the spray head, dust on the surface of the computer hardware is stripped, the cleaning efficiency is improved, the two sides of the computer hardware are fixed while cleaning is conducted, and the clamping time is saved while labor force is saved.

The invention relates to an alpha surface pollution simulation method based on magnetic nanoparticles. The method specifically comprises the following steps: S1, preparing a magnetic nanoparticle simulation source for alpha surface pollution simulation detection; S2, simulating operation of presetting the distance effect of the magnetic induction intensity as the distance effect of the alpha particles in air; S3, quantitatively measuring the magnetic induction intensity of a simulation source at a preset distance through a simulation source detection device to obtain a voltage value corresponding to the magnetic induction intensity at the preset distance, and judging a preset distance change condition or an erasing condition; S4, performing a distance change test; and S5, performing a simulation source erasing experiment. The corresponding alpha activity value is obtained by measuring the magnetic induction intensity.

The invention provides bicycle part machining and grinding equipment with a dust removal function. The bicycle part machining and grinding equipment comprises a supporting seat, mounting frames are fixedly connected to the front end and the rear end of the upper surface of the supporting seat, a mounting seat is mounted in the middle of the upper surface of the supporting seat, a dust removal fan is mounted on the left side of the upper surface of the supporting seat, a baffle is fixedly connected to the right side of the upper surface of the supporting seat, a dust removal groove is formed in the position, located on the left side of the baffle, of the upper surface of the supporting seat, and a collection box is slidably connected to the position, below the dust removal groove, in the supporting seat. The magnetic induction intensity of an iron core can be adjusted according to the position of a cleaning plate, the surfaces of parts are cleaned while fixing and dismounting are conducted, the machining efficiency is improved while manpower is saved, a metal bar can be driven to rotate to cut a magnetic field when the dust removal fan is started, dust is collected through a generated electric field, the overall automation degree is high, cleaning efficiency is improved, meanwhile, chippings generated by polishing are recycled, and waste and pollution are avoided.

A busbar having a magnetic shielding structure arranged between conductor bars and an outer casing. The magnetic shielding structure includes a first shielding element and a second shielding element each having a U-shaped cross-section. The shielding elements are made of ferromagnetic material and enclose—on opposite sides—conductor bars so that each fin of the first shielding element is at least partially superimposed on a homologous fin of the second shielding element. The shielding elements can consist of anisotropic ferromagnetic strips with oriented grains.

The invention relates to a magnetic conductance type shoe energy collection device. A base is provided with a permanent magnet magnetic yoke limiting clamp, a coil magnetic yoke limiting clamp and pendulum magnetic yoke limiting clamps; a permanent magnet magnetic yoke is located in the permanent magnet magnetic yoke limiting clamp; a permanent magnet is cylindrical; one end of the permanent magnet is arranged in the permanent magnet magnetic yoke, and the other end of the permanent magnet is connected with an upper magnetic yoke; a hole matched with the permanent magnet is formed in one end of the upper magnetic yoke; a mounting hole is formed in the other end of the upper magnetic yoke; an enameled copper coil is arranged below the mounting hole of the upper magnetic yoke; a coil lead-out end is connected with an energy collection circuit; a coil magnetic yoke is located in the coil magnetic yoke limiting clamp; the coil magnetic yoke is provided with a mounting shaft; the coil is wound on the mounting shaft; the mounting shaft is inserted into the mounting hole of the upper magnetic yoke; and a pendulum magnetic yoke is located between the pendulum magnetic yoke side limiting clamps. The magnetic conductance type shoe energy collection device of the invention has the advantages of high energy conversion efficiency, structural reliability, and simplicity and convenience in installation.

A shape change type footwear energy harvesting device is disclosed. Two identical lower magnet yokes are mounted on a bottom part of an inner side of a pedestal, the lower magnet yokes are fixed on alower bottom and a side wall of the pedestal, each of the lower magnet yokes is provided with two cylindrical installation shafts, an enameled copper wire coil is mounted on each installation shaft ofeach lower magnet yoke, a pair of wire coils are used as lead-out ends for electric energy collection, two lead-out ends are connected with an energy collection circuit, two ends of permanent magnetsare provided with round holes, installation shafts of the lower magnet yokes are mounted in round holes of the two permanent magnets, the permanent magnets are positioned above the wire coils, a nonmagnetic shape change rubber mat is embedded into a groove jointly formed by two lower magnet yokes and the pedestal, an upper part of the shape change rubber mat is provided with a rectangular blind hole, a bottom part of the rectangular blind hole is provided with a protruding stripe, an upper magnet yoke is mounted in a rectangular blind hole in the upper part of the shape change rubber mat, andthe upper magnet yoke is in contact with the protruding stripe of the bottom part of the rectangular blind hole of the shape change rubber mat. The shape change type footwear energy harvesting deviceis high in energy conversion efficiency, compact and reliable in structure, and simple and convenient in installation.

The invention provides a color steel tile shearing mechanism with an ASA base film as a film coating material. A first driving roller is movably connected to the left side of the upper surface of a supporting seat, a second driving roller is movably connected to the right side of the upper surface of the supporting seat, a mounting frame is arranged in the middle of the upper surface of the supporting seat, and a cavity is formed in the supporting seat; an air cylinder is mounted in the middle of the upper surface of the mounting frame, a shearing blade is arranged below the air cylinder, a discharging port is fixedly connected to the upper surface of the cavity, and a storage battery is arranged on the left side of the cavity. Chippings generated by shearing can be collected, falling chippings are classified through magnetic force and gravity, chippings of metal and ASA base films are distinguished, subsequent recycling and utilization are facilitated, the efficiency is improved whilemanpower is saved, a switch of a power source can be controlled according to opening and closing of a movable door, the overall automation degree is high, and meanwhile, direct contact between workers and the switch is avoided, and the safety is improved.

The invention belongs to the technical field of hot dipping, and particularly relates to a double-frequency electromagnetic field cooperative flow sealing device and system for hot dipping. The flow sealing device comprises a three-phase traveling wave magnetic field generator and a single-phase alternating magnetic field generator, wherein the three-phase traveling wave magnetic field generator is arranged on the outer side of a flow sealing distribution channel, and the single-phase alternating magnetic field generator is arranged below the three-phase traveling wave magnetic field generatorand below the liquid level of a plating solution at the bottom of the flow sealing distribution channel. And the frequency of the three-phase alternating current introduced into the three-phase traveling wave magnetic field generator is lower than that of the single-phase alternating current introduced into the single-phase alternating magnetic field generator. The flow sealing device can generate traveling wave electromagnetic force based on a traveling wave magnetic field and electromagnetic repulsion based on a single-phase alternating magnetic field, and through the combined action of thetraveling wave electromagnetic force and the electromagnetic repulsion, large electromagnetic force can be provided to counteract the gravity borne by the plating solution, the plating solution can be stabilized, and liquid leakage caused by uneven stress due to flowing deformation of the plating solution under the influence of workpiece movement is avoided.