217 results about "Halbach array" patented technology

The invention discloses a high-precision linear vibration feedback motor system, and relates to the technical field of precise electromagnetic driving, and the system comprises a core driving module which is a moving magnet type linear motor of a Halbach array magnetic circuit structure, and is integrated with a multi-physics field sensing unit; the dynamic parameter tracking module is used for acquiring a reed rigidity coefficient, a damping coefficient and a magnetic constant in real time when the motor runs, and establishing a dynamic displacement model based on a recursive least square method; a double-closed-loop control framework is adopted, an inner loop adopts field-oriented control, and an outer loop is based on model prediction control; the aging prediction unit activates a temperature rise compensation algorithm when the accumulated number of vibration times is greater than a set threshold value; the self-adaptive calibration engine is used for injecting a sweep frequency excitation signal when the system is started, and automatically compensating individual difference parameters according to the harmonic peak offset; and the digital twin mapping unit is used for establishing a real-time mapping relationship between the physical parameters of the motor and the virtual model, and dynamically correcting the model parameters by comparing the actual displacement with the model displacement.

The invention discloses a stator double-permanent-magnet flux reverse motor, and belongs to the technical field of motors. The motor comprises a stator, a rotor, tangential permanent magnets, Halbach array permanent magnets and windings, the stator is of a double-salient-pole structure formed by combining T-shaped stator iron core blocks. The rotor and the stator are coaxially assembled, and an air gap is reserved between the rotor and the stator. The tangential permanent magnets are installed between the stator iron core blocks and magnetized in the tangential direction, and the adjacent directions are opposite. The Halbach permanent magnets are arranged at the openings of the stator slots, so that the Halbach permanent magnets have a magnetism gathering effect and can provide relatively high air gap flux density; the winding adopts a double-layer centralized design and is embedded into a stator slot; the tangential permanent magnets and the Halbach permanent magnets form a parallel magnetic circuit, and the air gap flux density and the torque density are improved through magnetic field superposition; the number of winding pole pairs meets a specific formula, and the motor structure can be optimized through a finite element method. Compared with a traditional motor, the motor has higher air gap flux density, no-load back electromotive force and torque, lower torque pulsation and a higher power factor, and the electromagnetic performance and the operation stability are remarkably improved.

The invention provides a 90-degree Halbach array-based magnetic coupler for a reaction kettle, which comprises a sealing cover cylinder, an outer magnet support sleeve is rotatably connected to the outer side of the sealing cover cylinder, a plurality of outer magnets are arranged on the outer magnet support sleeve, an inner magnet support sleeve is rotatably connected to the inner part of the sealing cover cylinder, and a plurality of outer magnets are arranged on the inner magnet support sleeve. A plurality of outer magnets are arranged on the outer magnet supporting sleeve, a plurality of inner magnets are arranged on the inner magnet supporting sleeve, the outer magnets and the inner magnets are arranged according to a 90-degree Halbach array, the outer magnets are arrayed according to the fact that the magnetic induction intensity of the inner sides of the outer magnets is enhanced by the 90-degree Halbach array, and the inner magnets are arrayed according to the fact that the magnetic induction intensity of the outer sides of the inner magnets is enhanced by the 90-degree Halbach array. The invention further provides an optimal design method of the magnetic coupler, and an optimal design combination is found by adopting a multi-target parameterization optimal design method. The invention solves the technical problems of low magnetic field intensity between air gaps, low magnetic steel utilization rate, low maximum transmission torque and low design and development method efficiency of the existing magnetic coupler, and belongs to the technical field of magnetic drive reaction kettles.

The invention relates to the technical field of magnets, and particularly discloses a robot joint motor rotor multi-magnet magnetizing type magnet ring assembly process, which comprises the following steps of: arranging a plurality of magnetic parts to form magnetic units in a Halbach array, sequentially sticking the arranged magnetic units to the inner side of a mold through a sticking layer, and meanwhile, placing a shell on a bearing mechanism; the side edge of the shell is preheated through the heating unit; then the multiple magnetic units with the molds are placed into a magnetic mounting unit according to the sequence of the permanent magnet rings to wait for mounting; in the assembling process, the magnetic units on the mold are sequentially installed in the limiting containing area of the shell through the magnetic installation unit, demolding is conducted after installation is completed, and then the permanent magnet ring and the shell are pressed tightly through the pressing mechanism to form the magnet ring. The magnetic field performance is improved through Halbach array arrangement, the assembling efficiency and the product consistency are improved through the whole process, and the rate of unqualified products is reduced.

The invention discloses a transverse magnetic flux linear motor adopting a Y-shaped iron core and a Halbach array, belongs to the field of permanent magnet linear motor design, and aims at solving the problems that a traditional transverse magnetic flux linear motor is low in permanent magnet utilization rate, large in magnetic leakage and insufficient in power density. The device comprises a primary part and a secondary part, the primary part comprises stator iron cores which are sequentially arranged in the axial direction, each stator iron core is provided with three armature modules which are evenly distributed in the circumferential direction, and each armature module comprises long armature teeth, short armature teeth and armature windings. The tail ends of the long and short teeth adopt an inclined air gap and magnetism gathering pole shoe design; the secondary part comprises a Y-shaped secondary pole iron core and a Halbach permanent magnet array on the surface of the Y-shaped secondary pole iron core, and the permanent magnet array is divided into three areas in the circumferential direction, and the three areas correspond to the three-phase armature modules of the primary part respectively; the permanent magnets in each area are formed by staggering N poles and S poles in the axial direction, and the adjacent areas are staggered in the axial direction.

The invention relates to the technical field of electromagnetic coils, in particular to a Halbach array planar coil structure unit. The Halbach array planar coil structure unit is composed of a first substructure, a second substructure and a third substructure. According to the invention, a planar electromagnetic coil is adopted to form a Halbach array permanent magnetic field effect; the invention discloses a Halbach array permanent magnet structure, and aims to solve the problems that the existing Halbach array permanent magnet structure is difficult to miniaturize and rigid, cannot get rid of the limitation of permanent magnet materials, is difficult to realize a sine distribution magnetic field in a real sense and is low in electromagnetic utilization rate.

An) electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.

The invention provides an ultra-silence direct-current brushless outer rotor motor driving system and a design method. Aiming at the problems of large low-speed vibration, high-frequency howling, sudden load change, sharp noise increase and the like of a household motor, electromagnetic-structure-control triple collaborative optimization is provided: a harmonic-efficiency model is constructed in an electromagnetic side design, and a Halbach array and fractional slot winding design is combined, so that the proportion of a high-efficiency region is greater than or equal to 85%, and the force wave amplitude is reduced by 40%; a heat dissipation path is innovatively designed on the structure side through a thermal resistance equation, G1 is in dynamic balance (residual unbalance lt; 15 mg.mm / kg), the vibration acceleration is reduced to 0.3 m / s < 2 >; the control side HFI / SMO smooth switching (angle error lt; the dynamic PWM frequency modulation avoids the sensitive frequency band, and the load abrupt change responds to the lt; and 10ms. According to the invention, noise at 3000rpm is less than or equal to 32dB, and working condition fluctuation at 60 DEG C is achieved; the ultra-silence high-reliability motor is especially suitable for the requirements of household appliances such as a washing machine and the like on ultra-silence and high-reliability motors.

The utility model discloses an auxiliary suspension and guide system based on a Halbach array. The auxiliary suspension and guide system based on the Halbach array comprises a suspension piece and a fixing piece. The suspension part comprises a T-shaped framework, an adjustable telescopic device, a rotary motor, an annular Halbach array and a rectangular Halbach array; the fixing piece comprises a bottom magnetic rail, a side magnetic rail and a U-shaped frame. When the rotary motor runs, the annular Halbach array is driven to rotate to interact with the side magnetic track, required guiding force and driving force are provided, the distance between the rectangular Halbach array and the bottom magnetic track can be adjusted through the telescopic rod, and required suspension force is provided. According to the utility model, the condition of transportation load is optimized, the equipment loss caused by contact friction is greatly reduced, the energy loss is reduced, and the stability and the precision of operation are improved.

A magnetic coupling mechanism in a downhole flow control tool comprising a first chamber within a flow path of wellbore fluids with a first component comprising a Halbach array of magnets. A second chamber isolated from the wellbore environment comprises a second component with a Halbach array of magnets. The first chamber and the second chamber are coupled with a nonmagnetic separation. The second component is translated with the first component by a strong magnetic flux produced by the array of magnets.

The application relates to a modular magnetic reconfiguration parallel robot joint system for on-orbit autonomous assembly of a spacecraft, and belongs to the technical field of space equipment. The system is aimed at solving the problems of poor flexibility, low reconfiguration efficiency, difficulty in balancing high precision and high stiffness, and low reliability of existing space parallel robots. The technical scheme comprises a Halbach array magnetic ball and an electromagnetic locking ring of a magnetic joint module, a carbon fiber telescopic connecting rod micro servo motor and a harmonic reducer of a distributed drive branch chain, a multi-sensor data fusion unit configuration optimization algorithm module and a real-time control unit of an intelligent control system. The system can realize rapid joint mode switching, improve task response and execution efficiency, autonomously switch between precision mode and high stiffness mode to meet different operation scene requirements, adopt non-contact magnetic transmission to avoid friction and wear and pollution, improve system service life and reliability, and realize modular design for convenient maintenance and upgrading.

An electric machine, in particular a motor or a generator, comprising a rotor and a stator, wherein the rotor comprises a planar, ring-shaped rotor base element and the stator comprises a planar ring-shaped stator base element, wherein the rotor base element and the stator base element are aligned along an axial axis (Z) of the electric machine, wherein a plurality of magnet elements are arranged around the circumference of the ring-shaped rotor base element forming a Halbach magnet-ring assembly, wherein the Halbach magnet-ring assembly generates a magnetic field (BR) with axial and azimuthal components, wherein a plurality of coils are arranged around the circumference (C) of the ring-shaped stator base element.

The invention relates to the technical field of motors, in particular to an angle phase staggered double-harmonic parallel motor which comprises a heat dissipation outer frame and further comprises stator discs, the two stator discs are both arranged in the heat dissipation outer frame and are coaxially arranged, and the two stator discs are distributed at a certain angle relative to the rotation center in the circumferential direction in a staggered mode; and the magnetic flux disc is arranged in the heat dissipation outer frame, the magnetic flux disc is located between the two stator discs, the magnetic flux disc and the stator discs are coaxially arranged, and the magnetic flux disc comprises an isolation plate. The magnetic flux disc is arranged, the permanent magnets on the two sides of the magnetic flux disc are arranged according to a Halbach array, the permanent magnets and the two stator discs with staggered angles form an independent magnetic circuit, and the air gap flux density and the torque density are improved; the two Halbach array permanent magnets are separated through the separation plate, and the permanent magnets are in a fragmentation design, so that the eddy current loss is reduced, and the heat dissipation effect is improved; large magnets and small magnets are alternately arranged to form a Halbach array, and the direction of magnetic lines of force is optimized.

The invention discloses a transmitting coil structure based on a Halbach array and a switching control circuit thereof, which are applied to a dynamic wireless charging system of an unmanned aerial vehicle. When the unmanned aerial vehicle travels in the charging channel, the relative displacement between the transmitting coil and the receiving coil can cause the change of the coupling coefficient between the coils, and the charging of the unmanned aerial vehicle is unstable, so that the device has a relatively high anti-offset characteristic, the change of the coupling coefficient can be weakened, and the charging stability of the unmanned aerial vehicle is improved. And the cooperative control method is utilized to reduce the mutual influence between the stacked coils, so that the unmanned aerial vehicle can be stably charged in the driving process. And secondly, the characteristics of the Halbach array are reasonably utilized, the magnetic field intensity of the receiving coil side can be enhanced by adopting the coil arrangement mode of the Halbach array, meanwhile, the leakage magnetic flux of the transmitting coil is reduced, and the energy transfer efficiency of the dynamic wireless charging system is effectively improved.

This invention discloses a monotonic magnetic ring dual-rotor radial-axis composite modulation magnetic gear. The magnetic gear includes an inner rotor yoke, an inner rotor permanent magnet, a tuning ring, an outer rotor permanent magnet, and an outer rotor yoke. The inner rotor yoke and the inner rotor permanent magnet constitute the inner rotor, and the outer rotor permanent magnet and the outer rotor yoke constitute the outer rotor. The inner and outer rotors are coaxially arranged to form a dual-rotor structure, capable of relative rotation. The tuning ring, a single tuning structure, is positioned between the inner and outer rotors to simultaneously achieve radial modulation and axial differential modulation, thus forming a radial-axis dual-modulation magnetic gear. Both the inner and outer rotor permanent magnets employ an asymmetric Halbach array structure. This application achieves radial modulation and differential modulation, constructing a radial-axis coupled dual-modulation magnetic field structure, improving magnetic field utilization and torque transmission capability.

One embodiment may include a method for mounting magnets: assembling (S10) an arrangement device (120) and an alignment device (110), wherein the alignment device (110) has a cylindrical shape with a rotation axis (c), placing (S20) a plurality of guide pins (131) in a placement recess (121) formed between the alignment device (110) and the arrangement device (120), wherein the plurality of guide pins (131) form a pin structure (130), placing (S20) a plurality of magnets (20) at first mounting spaces (P1) between the plurality of guide pins (131) in the placement recess (121), removing the plurality of guide pins (131) from the placement recess (121), wherein second mounting spaces (P2) are provided, placing (S40) circumferential magnets (20a) at the second assembly rooms (P2),Pressing (S50) the upper ends of the majority of magnets (20) and the circumferential magnets (20a) to align all array magnets according to a specific height, curing (S60) a bonding material (40) between the aligned array magnets, and releasing (S60) the alignment device (110) from the array magnets.

The invention relates to a magnetic type draught fan tower outer wall defect integrated treatment wall-climbing robot and an operation method thereof.The magnetic type draught fan tower outer wall defect integrated treatment wall-climbing robot comprises a vehicle shell, the top of the vehicle shell is connected with a defect treatment mechanism through a six-degree-of-freedom mechanical arm, a magnetic adsorption module is arranged at the bottom of the vehicle shell, and the vehicle shell is in magnetic adsorption fit with the wall face of a tower through the magnetic adsorption module; a passive flexible mechanism and a walking driving mechanism are fixedly installed on the vehicle shell and are in transmission connection with walking wheels used for walking on the wall face together. A composite structure of the Halbach array, the multi-deformation magnetic unit and the conical pole shoe is innovatively adopted, a magnetic field is superimposed through 90-degree gradient magnetizing, the adsorption force is improved by 50% compared with a traditional adsorption force, the adsorption force is matched with the curved surface of a tower drum, and heavy-load stable walking is guaranteed; and meanwhile, the six-axis flexible mechanical arm is integrated with a detection, grinding and spraying integrated module, layout is simplified, the load is reduced, the high-altitude movement risk is avoided, and operation flexibility and safety are both considered.

The invention discloses a dual three-phase asymmetric Halbach array permanent magnet fault-tolerant motor, and belongs to the field of permanent magnet motor design. The stator comprises a stator core, double three-phase centralized windings, armature teeth and fault-tolerant teeth. The rotor comprises a rotor iron core, asymmetric Halbach array permanent magnets and magnetic barriers, the semi-open magnetic barriers with openings facing the air gap side are arranged on the outer circumference of the rotor iron core, and the asymmetric Halbach array permanent magnets are arranged on the iron core in the circumferential direction. The tangential magnetized short permanent magnet is arranged in the magnetic barrier semi-open slot, and the tangential magnetized long permanent magnet extends to the bottom of the magnetic barrier from the magnetic barrier semi-open slot and is partially embedded in the magnetic barrier in the form; and two adjacent magnetic barriers are isolated by a magnetic isolation bridge. The leakage flux path is subjected to shunting regulation and control, so that the end leakage flux of the permanent magnet is reduced, and the effective flux utilization rate and the torque density of the air gap are improved; according to the invention, high torque density and low magnetic flux leakage are considered, the continuous output capability of the motor under a single-phase / multi-phase fault condition is enhanced, and a driving scene with a high reliability requirement is satisfied.

The application belongs to the field of ultra-precision damping, and specifically discloses a Halbach magnetic negative stiffness mechanism with high negative stiffness, which comprises a support frame, a stator permanent magnet assembly, a mover permanent magnet assembly, a spacing adjusting assembly and a linear guide assembly, and the stator permanent magnet assembly and the mover permanent magnet assembly are both Halbach array structures; the stator permanent magnet assembly comprises a first stator permanent magnet group and a second stator permanent magnet group, the first stator permanent magnet group and the second stator permanent magnet group are symmetrically arranged on the support frame, and the first stator permanent magnet group, the second stator permanent magnet group and the mover permanent magnet assembly are parallel to each other; the spacing adjusting assembly is arranged on the support frame to drive the first stator permanent magnet group and the second stator permanent magnet group to move closer to each other or farther away from each other. Through the structural design of the magnetic negative stiffness mechanism, a greater negative stiffness value can be generated in the same space, and the spacing adjusting assembly can be used to adjust the negative stiffness value of the magnetic negative stiffness mechanism, so that the applicability is better.

The application relates to the technical field of Halbach array magnet, and particularly discloses a manufacturing method of a Halbach array magnet assembly, which comprises the following steps: 1) preliminarily processing a blank material to obtain a permanent magnet blank with a thickness not greater than 1.5 mm and a length-diameter ratio greater than 20; 2) performing Halbach array arrangement, marking a fitting surface and a non-fitting surface on the permanent magnet blank; 3) coating an adhesive layer on the fitting surface and an anti-oxidation layer on the non-fitting surface, fitting the fitting surface, and performing diffusion connection treatment under vacuum pressure to obtain an assembly product after heat treatment; 4) performing secondary processing to meet the size requirement of a target Halbach array, and forming a Halbach array magnet assembly semi-finished product; 5) performing surface processing treatment; and 6) performing integrated magnetization according to an orientation direction to obtain the Halbach array magnet assembly. According to the application, the single-piece magnet with a thickness not greater than 1.5 mm and a length-diameter ratio greater than 20 can be uniformly and densely fitted and is not prone to deformation in the process of manufacturing the Halbach array magnet assembly.

The utility model discloses an inclined magnetizing gyromagnetic assembly, which belongs to the technical field of magnetic therapy equipment and comprises two main magnetic poles, the two main magnetic poles are oppositely connected in series in an N-S pole mode, an included angle alpha is formed between the N-S pole magnetizing direction of the main magnetic poles and the horizontal plane, alpha is larger than 5 degrees and smaller than 85 degrees, and preferably, the inclined magnetizing gyromagnetic assembly further comprises two identical auxiliary magnetic pole sets. Each auxiliary magnetic pole group is composed of three auxiliary magnetic poles, namely an auxiliary magnetic pole A and two auxiliary magnetic poles B, the two auxiliary magnetic poles B clamp the auxiliary magnetic pole A to form a Halbach array combination, the magnetizing directions of the auxiliary magnetic poles A and the auxiliary magnetic poles B are perpendicular to each other, and the two auxiliary magnetic pole groups are tightly attached to the side edge of the main magnetic pole; under the condition that the magnetic material with the same volume as the prior art is adopted, the penetration depth of the magnetic material is more than 1.5 times that of the prior art, the surface magnetism is improved to more than 12000 gauss from 9000 gauss in the prior art, and the magnetic therapy effect can be remarkably improved when the magnetic material is used for a gyromagnetic therapeutic instrument.

Two push rod type linear stepping motors in the device are arranged at the two ends of a guide rail through L-shaped push rods, carrying tables are arranged above the L-shaped push rods, telescopic rotating motors are arranged on the carrying tables respectively, the telescopic rotating motors are vertically connected with magnet plates, and the magnet plates are arranged on the carrying tables. A third telescopic rotating motor is arranged at the rear end of one magnet plate, a vertical guide rail groove and a transverse guide rail groove are formed in one magnet plate, and the control module is connected with all the motors. According to the invention, the high gradient magnetic field advantage of the panel Halbach array is utilized, the precise control capability of the motor is combined, the automatic uniform field and gradient field conversion function of the device is utilized, and a microscope with an image acquisition function is matched, so that the degree of phagocytosis of magnetic particles by cells is automatically observed, and multiple sets of magnetic field devices do not need to be additionally arranged; the cell activity can be effectively protected, and the magnetic field application requirements in the fields of biomedical detection, analysis detection and the like are met.

The invention discloses a magnetism gathering type magnetic steel assembly and a manufacturing process thereof, and relates to the technical field of Halbach arrays, and the process comprises the steps: S10, magnetizing each single magnet; s20, the adjacent single magnets are bonded through glue; s30, the magnetic steel assembly is plugged into the tool before the glue is solidified, S40, the magnetic steel assembly is beaten towards the groove bottom direction of the containing groove, and all single magnets of the magnetic steel assembly abut against the side wall of the containing groove; s50, the other opening of the two opposite openings is inversely buckled on the plane, and one end, extending out of the opening of the placing groove in the width direction, of the opening is beaten in the plane direction, so that the magnetic steel assemblies are flush in the width direction; the magnetic steel assembly comprises a plurality of single magnets, the single magnets are sequentially arranged into a strip shape from left to right, the adjacent single magnets are in slope contact, and the magnetic direction generated by the single magnet located on the right side at the position of the single magnet is consistent with the magnetic direction generated by the single magnet located on the left side at the same position. The device is easy to assemble.

Provided is a rotating electric machine comprising: a stator 1 having a slot 9 and a winding 10; and a rotor 2 having a permanent magnet 3 and a rotor core 12, the rotor being disposed with an air gap 13 between the rotor and the stator 1. The permanent magnet 3 comprises: a main magnet 31 that is arranged at a magnetic pole center and that has a magnetic pole oriented in a radial direction of the rotor 2; and an auxiliary magnet 32 that is adjacent to the main magnet 31 and that has a magnetic pole oriented in a circumferential direction. The main magnet 31 and the auxiliary magnet 32 are alternately arranged on an outer peripheral side of the rotor core 12 according to a Halbach array. In a radial direction cross section of the rotor 2, the main magnet 31 is formed in a trapezoidal shape in which the length of one side facing the stator 1 is shorter than the length of the other side located on the side opposite the stator 1. The rotor core 12 has, on the stator 1-side surface thereof, a groove-shaped main magnet fixation part 21 that is formed so as to correspond to the cross-sectional shape of the main magnet 31, and the main magnet 31 is fitted into and fixed to the main magnet fixation part 21.

The utility model relates to the technical field of magnetic induction type keyboards, in particular to a magnetic suction foot support structure of a magnetic induction type keyboard, and aims to solve the problems that a traditional buckle foot support is not attractive and a traditional magnetic suction type foot pad can interfere with the magnetic induction type keyboard, the magnetic suction foot support structure comprises a bottom shell, and a circuit board is fixedly installed on the inner wall of the bottom shell. According to the magnetic induction keyboard, the first Halbach array magnet and the second Halbach array magnet are matched with each other, so that the magnetic field of the sides, close to each other, of the first Halbach array magnet and the second Halbach array magnet is increased, the magnetic field of the sides, away from each other, of the first Halbach array magnet and the second Halbach array magnet is greatly reduced, and interference on the magnetic induction keyboard is reduced; a magnetic field above the first Halbach array magnet can be collected and absorbed again through the magnetic field shielding alloy block, the first Halbach array magnet can be prevented from interfering with a magnetic induction element on the circuit board, the keyboard bottom shell can be taken down at any time, it is ensured that the integrity of the bottom of the keyboard bottom shell is not damaged, the attractiveness is improved, and the keyboard is convenient to use. And the method is suitable for a magnetic induction keyboard.

The invention discloses a portable hydraulic tensioner calibrator, and relates to the technical field of metering calibration instruments, a control system is arranged at the tops of four pulleys, the top of the control system is provided with a magnetic suspension zero-friction calibration assembly and a kinetic energy recovery module, and the kinetic energy recovery module is arranged on one side of the outer wall of the magnetic suspension zero-friction calibration assembly. A magnetic suspension zero-friction verification assembly is arranged, zero-contact transmission of a piston is achieved through the magnetic suspension technology, nonlinear errors caused by mechanical friction can be thoroughly eliminated, a magnet adopts a Halbach array mode, magnetic pole arrangement is optimized, magnetic lines of force are concentrated in the single direction, a higher magnetic field can be output under the condition of the same magnet using amount, and the reliability of the device is improved. Meanwhile, the fiber grating sensor and multiple sensors are fused, force value changes of higher levels can be captured, the accuracy of the verification result is ensured, the magnetic suspension and magnetic fluid sealing technology can avoid physical contact between the piston and the cylinder wall, and the service life of the verification instrument is greatly prolonged.

The present invention discloses a magnetohydrodynamics power system which utilizes low temperature heat source. Variable control of the operation of the system, along with determining configurations for specific cases, are made possible by selecting the refrigerant, liquid metal circuit geometry, and by adjusting the system condensing pressure and / or temperature. Adjustable condensing pressure and / or temperature allows the system to react to changing ambient temperature and maximize power output. Adjusting condensing pressure and / or temperature of the system is made possible with a variable condenser pressure controller. The variable condenser pressure controller allows utilization of the physical properties of the refrigerant over a wide range of condensing temperatures / pressures, including pressures in the vacuum range. Meanwhile rare earth permanent magnets in paired Halbach arrays are used in the magnetohydrodynamics generator to augment the magnetic field, and a series electrode connection is made possible to achieve a high voltage output.

The invention provides an optimization method and system for a magnetic adsorption movement mechanism of a steel structure inspection robot, and relates to the technical field of magnetic adsorption movement mechanisms and optimization design of the magnetic adsorption movement mechanisms. Establishing a finite element simulation model of the magnetic adsorption movement mechanism based on the Halbach array, and obtaining a design variable set; constructing a finite element agent model, introducing auxiliary features, inputting the auxiliary features and the high-quality design variable set as numerical features into the finite element agent model, reasoning by adopting a loss function containing a safety boundary penalty term, and outputting to obtain a prediction result of the magnetic adsorption force and gravity of the magnetic adsorption movement mechanism; a GA-DE hybrid optimization algorithm based on adaptive subgroup proportional adjustment and a constraint annealing mechanism is adopted, the magnetic mass ratio of the magnetic adsorption movement mechanism is maximized on the premise that mechanical constraints are met, and optimal structural design variables meeting constraint conditions are output. Performance maximization of the magnetic adsorption movement mechanism is achieved on the premise that safe adsorption is guaranteed.

The invention discloses an arc path forming portion and a direct current relay including the arc path forming portion. The arc path forming portion and the direct current relay including the arc path forming portion, which can further reduce manufacturing cost and improve manufacturing convenience, include: a magnet frame; and a Halbach array disposed adjacent to an inner circumferential surface of the magnet frame so as to form a magnetic field inside the magnet frame, the Halbach array including a first magnet block, a second magnet block, and a third magnet block disposed aligned in one direction, the surface of each of the first magnet and the third magnet facing the second magnet is magnetized to have the same polarity as the polarity of the surface of the second magnet opposite to the fixed contact.

The invention belongs to the technical field of Halbach magnet assembling, and particularly relates to a Halbach array magnet assembling device and method.The assembling device comprises a bottom plate, a magnet assembly, a gluing assembly, a spacing assembly and a fixing assembly, and the magnet assembly comprises a back plate, a first magnet, a second magnet and a third magnet; the gluing assembly comprises a first gluing frame, a second gluing frame and a third gluing frame which are respectively used for gluing the back plate, so that a first magnet, a second magnet and a third magnet are adhered to the back plate; the spacing assembly is used for isolating the first magnet, the second magnet and the third magnet from the back plate respectively; the fixing assembly is mounted on the bottom plate, is used for mounting a second magnet and a third magnet on the back plate and is connected with the first magnet; and a first magnet, a second magnet and a third magnet are sequentially assembled on the back plate through the gluing assembly, the spacing assembly and the fixing assembly to form the magnet assembly.