4748 results about "Magnetic poles" patented technology

There is provided an intravascular blood pump for insertion into a patient's heart. The blood pump comprises a slotless permanent magnet motor contained within a housing, the motor having p magnet pole pairs and n phases, where p is an integer greater than zero, and n is an integer ≥3. The motor comprises a stator extending along a longitudinal axis of the housing and having 2np coils wound to form two coils per phase per magnet pole pair. The stator comprises inner and outer windings each comprising np coils electrically connected such that the current flowing through the coils is in the same direction, the coils of the outer winding arranged on an outer surface of the coils of the inner winding.

The invention belongs to the technical field of rotating motors, and discloses a motor with a self-locking function, and the motor comprises a housing which is internally provided with a polygonal cavity, and the polygonal cavity is provided with at least two groups of corner parts which are oppositely arranged; the stator magnets are arranged in the polygonal cavity in pairs, the stator magnets are installed at the corner parts in a one-to-one correspondence mode, the sides, facing the center, of the stator magnets are provided with arc-shaped faces, the arc-shaped faces are provided with grooves penetrating through the stator magnets in the height direction, and the stator magnets are divided into a plurality of stator magnetic poles through the grooves; the grooves in each stator magnet are formed in the same position; the plurality of arc-shaped surfaces are encircled to form a mounting area, the rotor is rotatably arranged in the mounting area, and the motor shaft is fixed in the center of the rotor and penetrates out of the shell. The motor with the self-locking function is high in self-locking stability, low in abrasion and adaptive to a compact structure.

A double cold rolled non-oriented electrical steel sheet having a composition including: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.2%, 3.1%≤Silicon≤3.6%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, is from 35% to 45% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.64 T to 1.66 T.

A double cold rolled non-oriented electrical steel sheet having a composition including, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.3%, 3.2%≤Silicon≤3.8%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 30% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66 T to 1.69 T.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%,, 0.15% ≤Manganese≤0.2%, 3%≤Silicon≤3.6%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn ≤5.5%, and can contain various optional elements, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet being made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, of 35 to 55% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.635T to 1.670T.

The invention relates to a permanent magnet synchronous motor optimization method and system based on a novel topological structure. The method comprises the steps that parametric modeling is carried out through preset magnetic pole block parameters, preset magnetic barrier groove geometric parameters and preset asymmetric air gap parameters, and a variable topology model library is generated; through multi-physics field coupling simulation, dynamic eddy current distribution, a local demagnetization risk coefficient and a high-frequency vibration mode of the permanent magnet synchronous motor are calculated; constructing a multi-target optimization model for optimization through dynamic eddy current distribution, a local demagnetization risk coefficient and a high-frequency vibration mode, and generating a Pareto optimal solution set; and based on the manufacturing tolerance sensitivity parameter and demagnetization risk coefficient distribution in the solution set, constructing a topology fault-tolerant structure and obtaining a dynamic current compensation strategy, and generating a final optimization scheme. According to the method, through comprehensive application of multi-physical field coupling simulation, multi-objective optimization and a dynamic compensation strategy, the precision and scientificity of motor optimization are improved, and effective technical support is provided for design and manufacturing of the motor.

The invention discloses an axial flux motor, an electric drive system and a vehicle. The axial magnetic flux motor adopts a single-stator and double-rotor structure in which a stator is arranged in the middle and rotors are arranged on two sides, and comprises a stator assembly, and a first rotor assembly and a second rotor assembly which are distributed on two sides of the stator assembly, and the first rotor assembly and the second rotor assembly are respectively connected with the stator assembly through a first rotor bearing and a second rotor bearing. The single-stator double-rotor axial flux motor only comprises one stator assembly, so that the energy loss is low, the heat productivity is low, the power density is higher, and the energy conversion efficiency is higher. One end of the rotor shaft is fixedly connected with the output part of the first rotor assembly, and the other end of the rotor shaft is in transmission connection with the output part of the second rotor assembly. The tolerance of the relative positions of the two rotor assemblies is smaller, the magnetic poles of the magnetic steel of the two rotor assemblies can be in one-to-one correspondence, and the difficulty of motor calibration after the motor assembly is assembled is reduced.

A double cold rolled non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.3%, 3.1%≤Silicon≤3.8%, 0.6%≤Aluminum≤0.8%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition is iron and unavoidable impurities caused by processing. The microstructure ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, of 40 to 50% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66T to 1.7T.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.25%, 3.2%≤Silicon≤3.8%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and various optional elements. The remainder composition is iron and unavoidable impurities caused by processing. The microstructure is ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 33% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.630T to 1.65T.

The invention provides an axial magnetic field modulation type magnetic gear applying a T-shaped modulation ring structure, which belongs to the field of motors and comprises a high-speed permanent magnet rotor, a low-speed permanent magnet rotor and a T-shaped modulation ring. The modulation ring comprises a plurality of T-shaped magnetic modulation pole pieces and T-shaped non-magnetic composite material pole pieces which are alternately arranged and bonded in the circumferential direction. The high-speed permanent magnet rotor and the low-speed permanent magnet rotor each comprise a rotor iron core composed of a plurality of rotor yokes, and N-pole permanent magnets and S-pole permanent magnets embedded between the adjacent rotor yokes in the circumferential direction. The high-speed permanent magnet rotor and the low-speed permanent magnet rotor coaxially sleeve the modulation ring on the two sides of the modulation ring respectively, and form radial and axial air gaps with the modulation ring. Leakage flux at the inner peripheral ends of the rotor yokes of the high-speed and low-speed permanent magnet rotors can enter the T-shaped modulation rings to be linked with magnetic flux generated by the corresponding rotor permanent magnets, the leakage flux at the inner peripheral ends of the rotor yokes on the two sides is reduced, the high-speed and low-speed rotors coaxially rotate, the air gap flux density can be increased, and therefore the gear output torque and the torque density are improved; meanwhile, the modulation ring is easy to process and compact in structure.

The invention relates to a crawler-type magnetic adsorption wall-climbing robot, and belongs to the field of wall-climbing robots. The wall-climbing robot comprises a main body bracket, a control module, a driving module, an adsorption module and a mechanical arm module, the main body support is a frame of a hollow structure and comprises a bottom plate, side plates arranged on the two sides of a chassis and a cover plate connected with the tops of the side plates, and a power source is arranged in the main body support. The control module is arranged in the main body bracket and is electrically connected with a power supply, and the control module comprises a wireless communication unit. The robot is simple in structure and high in obstacle crossing capacity, permanent magnet magnetic poles are arranged in a Halbach array, the upper sides and the lower sides of the magnetic poles are in an upper strong magnetic state and a lower weak magnetic state, and the magnetic adsorption force to the wall face is greatly improved.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.21%≤Manganese≤0.7%, 3%≤Silicon≤3.6%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and can contain various optional elements. The remainder composition being composed of iron and unavoidable impurities. The microstructure is ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, from 35% to 45% and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.63T to 1.66T.

The invention provides a multi-field regulation and control excitation welding device and system and a magnetic field control method. The welding device comprises a welding gun; the excitation magnetic poles are symmetrically arranged on the two sides of the welding gun. The at least one group of common magnetic poles are arranged on one side of the welding gun and are respectively connected with a pair of excitation magnetic poles; in a first power-on state, one of the pair of excitation magnetic poles and the common magnetic pole are communicated with first current at the same time; in a second power-on state, the other one of the pair of excitation magnetic poles and the common magnetic pole are communicated with second current at the same time; and when the welding gun is in a working state, the first current and the second current are alternately started to form double-path pulse current so as to generate a pulse composite magnetic field capable of acting on the electric arc, the molten pool and the molten drops. According to the welding device, molten pool flowing and molten drop transition can be regulated and controlled in the transverse direction, the longitudinal direction and the vertical direction correspondingly, electric arc energy distribution is optimized, the penetration depth and molten pool swinging are increased, the welding speed is increased, root penetration is enhanced, weld joint forming is improved, welding heat input is reduced, welding deformation is reduced, and the manufacturing cost is reduced.

The invention relates to the technical field of space electric propulsion, in particular to an ion thruster discharge chamber magnetic pole optimization method, which obtains an optimized discharge chamber magnetic pole structure by researching plasma generation and evolution behaviors under a specific magnetic pole structure based on a plasma numerical simulation process. On one hand, plasma characteristic parameters which cannot be tested by a test are obtained by using a numerical simulation means and a basic discharge principle of a discharge chamber, and on the other hand, change relationships between electron motion behaviors and the magnetic field intensity of a cathode magnetic pole and the magnetic field intensity of a conical section magnetic field are established; the working process and the working mechanism in the discharge chamber when the ion thruster works are understood more deeply, and data support and technical support are provided for optimization design of the discharge chamber of the ion thruster.

The invention provides a rotor assembly, a motor and a vehicle, and the rotor assembly comprises a rotor main body, the material of the rotor main body is an amorphous material, the rotor main body is provided with a plurality of fan-shaped regions distributed along the circumferential direction of the rotor main body, and each fan-shaped region is provided with a magnetic pole center line along the axial direction of the rotor main body; each fan-shaped area is provided with one magnetic piece set, each magnetic piece set can generate a magnetic field in the fan-shaped area where the magnetic piece set is located, and the magnetic fields are asymmetrical along the center line of the magnetic pole. According to the rotor assembly, the motor and the vehicle provided by the invention, the technical problem of output performance reduction caused by power output saturation can be solved to a certain extent.

The permanent magnet type dual-drive electric vibration exciter comprises a magnetic circuit assembly and a moving coil assembly, the magnetic circuit assembly comprises a magnetic steel ring, an upper permanent magnet, a lower permanent magnet, a center magnetic pole and a bottom connecting plate, a first containing space and a second containing space are arranged in the magnetic steel ring, the upper permanent magnet is arranged in the first containing space, and the lower permanent magnet is arranged in the second containing space. The moving coil assembly comprises a moving coil framework, a first driving coil and a second driving coil, the first driving coil and the second driving coil are wound on the moving coil framework, the upper permanent magnet, the magnetic steel ring and the center magnetic pole form an upper magnetic field ring space, the first driving coil is located in the upper magnetic field ring space, and the second driving coil is located in the lower magnetic field ring space. The lower permanent magnet, the magnetic steel ring and the central magnetic pole form a lower magnetic field ring space, the second driving coil is located in the lower magnetic field ring space, the central magnetic pole is arranged in the magnetic steel ring, and the bottom connecting plate is arranged at the bottom of the lower magnetic steel ring; two independent magnetic field loops are established, a larger magnetic field is achieved, thrust is increased, the utilization rate of the magnetic field is improved, and higher vertical vibration precision and smaller transverse vibration are achieved.

Magnetic coupling devices are disclosed having magnetic field sensors. The magnetic coupling device may include degaussing coils wrapped about pole extension shoes of the magnetic coupling device.

The invention relates to a multi-pole magnetic field magnetizing test method and a spiral winding group thereof, and relates to the field of automatic magnetizing technology, and the method comprises the steps: constructing a test model, importing design parameters of a magnet to be tested, determining a multi-pole magnetic field distribution theoretical model, and defining a magnetic pole region and a key feature contour line; acquiring magnetic field data, scanning the surface of the magnetized magnet by using an array probe, and acquiring magnetic field intensity actual measurement data of a multi-dimensional coordinate; matching a magnetic pole contour, comparing an actually measured contour line with a theoretical contour line, and establishing sampling point mapping; correcting the deviation data, screening the deviation sampling points exceeding the threshold value, and determining magnetizing process adjustment parameters; and evaluating the magnetizing efficiency, carrying out iterative magnetizing based on the correction parameters, and generating an evaluation report containing indexes such as magnetic field uniformity and the like. The method has the effect of improving the magnetic field intensity and stability of the magnet during orientation magnetization.

A structure of a rotor changeable of a magnetic force is provided, which includes a rotor core and a plurality of magnetic pole parts disposed therein. Each magnetic pole part includes a radially-magnetized fixed magnetic-force magnet and a circumferentially-magnetized variable magnetic-force magnet. A cavity part is disposed between the fixed magnetic-force magnet and the variable magnetic-force magnet. The cavity part has a cross-section extending from an end part of the fixed magnetic-force magnet toward an opposing surface. The cavity part is formed so that a distance between the variable magnetic-force magnet and the cavity part in the circumferential direction becomes larger as the cavity part approaches the opposing surface, and a width of the cavity part in the circumferential direction becomes smaller as the cavity part separates from the fixed magnetic-force magnet in the radial direction.

The utility model discloses an ultrasonic composite magnetic field auxiliary polishing device, and belongs to the field of precision machining of curved surfaces of complex structures. The device comprises a six-axis precision machine tool, an electric spindle, an ultrasonic vibration device, a multi-magnetic-pole coupling polishing device, a workpiece, a connecting clamping device and an industrial control host, the electric spindle is clamped on an A-axis indexing table of the machine tool, the ultrasonic vibration device is installed at the tail end of the electric spindle, and the multi-magnetic-pole coupling polishing device is installed at the lower end of the ultrasonic vibration device through a connecting sleeve. According to the types of magnetic poles, the multi-magnetic-pole coupling polishing device is divided into a permanent magnetic pole polishing device, an electromagnetic pole polishing device and a mixed magnetic pole polishing device. The industrial control host controls all the modules to achieve cooperative movement, the multi-magnetic-pole coupling polishing device generates a coupling rotating magnetic field, the ultrasonic vibration device enhances relative movement between the surface of a workpiece and a polishing medium, and the polishing consistency and the machining quality of a complex structure curved surface are improved.

The invention discloses a method for accurately simulating temperature distribution of a cold pole coil in a subarea air of a hydro-generator, belongs to the technical field of hydro-generators, and aims to realize high-precision simulation of temperature distribution of a rotor coil by considering a complex multi-branch flow effect in a motor, change of loss density of the rotor coil along with position and temperature coupling and the like. The constructed three-dimensional model comprises the main characteristics of multi-branch flow formed by a magnet yoke annular gap, a stator air duct, a coil inner cooling air duct and the like, and can simulate the distribution of long and short turns, inner cooling holes and the like of a real rotor coil; the set flowing and heat exchange boundary conditions can simultaneously consider the coupling change of the rotor coil loss density along with the position and the temperature and the air flowing state of a dynamic and static connection area, and the method is realized in AnsysFluent or CFX software by utilizing a self-programming function or an Expression expression.

The invention provides an electro-permanent magnet uncoiling composite magnetic field multi-mode adjustment system which comprises a data acquisition and preprocessing module, a graph structure construction module, a dynamic prediction module, a historical matching prediction module, a magnetic force adjustment strategy module and an electro-permanent magnet execution mechanism. The data acquisition module constructs a multi-modal data cube through a temperature field, deformation, stress and magnesium powder concentration sensing network; the graph structure module discretizes the steel strip coil into a node network and calculates a mechanical association edge weight; the dynamic prediction module updates node features through the graph neural network and then outputs a sliding probability vector through the LSTM network; the historical matching module screens similar working conditions based on a dynamic time warping algorithm and generates magnetic force preset parameters; the strategy model fuses the probability vector and a preset parameter to generate a partition magnetic matrix; and the execution mechanism realizes millisecond-level magnetic field regulation and control through the reconfigurable magnetic pole array. According to the system, the magnetic field control precision can be improved, the interlayer sliding risk is reduced, and the self-adaptive adjustment effect is achieved.

The glass substrate cassette with the supporting cantilever provided with the permanent magnet vibration reduction piece comprises an upper frame and a lower frame which have corresponding transverse width and depth, and a plurality of left and right outer frame columns and rear frame columns which are supported between the upper frame and the lower frame to form a containing space; the left outer frame column and the right outer frame column respectively extend towards the containing space to be provided with a plurality of short supporting rods, the rear frame column is respectively provided with a plurality of supporting cantilevers in an extending mode, the supporting cantilevers are respectively provided with a fixed end and a free end, the free end is provided with a permanent magnet vibration reduction piece, and the permanent magnet vibration reduction piece is respectively provided with an upper magnetic pole and a lower magnetic pole. And the other permanent magnet vibration reduction piece is opposite to the free end of the vertically adjacent supporting cantilevers, so that when the free end deviates from a balance position to start vibration, the permanent magnet vibration reduction pieces can be synchronously driven, combined magnetic restoring force facing the balance position is obtained from the adjacent permanent magnet vibration reduction pieces on the upper side and the lower side, and the permanent magnet vibration reduction pieces return to the balance position more quickly.

The invention provides a double-magnetic-source micro-nano magnetic medium sealing device and a gas turbine, and relates to the technical field of sealing devices.The double-magnetic-source micro-nano magnetic medium sealing device comprises an outer rotor, an inner rotor, a first sealing assembly and a second sealing assembly; the first sealing assembly and the second sealing assembly are matched with the cavity and comprise first pole shoes, permanent magnets and second pole shoes which are sequentially arranged in the first direction, and the magnetic pole direction of the permanent magnets and the direction where the pivoting axis of the inner rotor is located are the first direction. The polarity of the permanent magnet of the first sealing assembly and the polarity of the permanent magnet of the second sealing assembly are opposite, and the permanent magnet of the first sealing assembly and the permanent magnet of the second sealing assembly are spaced in the radial direction of the inner rotor. Micro-nano magnetic media are adsorbed between the first pole shoe of the first sealing assembly and the first pole shoe of the second sealing assembly and between the second pole shoe of the first sealing assembly and the second pole shoe of the second sealing assembly. According to the invention, the stroke of a magnetic loop is shortened by adopting double magnetic sources, the magnetic field intensity at a sealing gap is increased, and the pressure resistance of a micro-nano magnetic medium under a high-speed working condition is improved.

The invention discloses a magnetofluid type silicon controlled rectifier radiator and a heat dissipation control method thereof. The radiator comprises a silicon controlled rectifier, a magnetic fluid chamber is attached to the outer side of the silicon controlled rectifier, the magnetic pole array is installed in the magnetic fluid chamber, and cooling fins are assembled outside the magnetic fluid chamber. When alternating current is introduced into the cavity where the magnetic fluid liquid chamber is located, the alternating current and the magnetic field interact to generate Lorentz force, the Lorentz force drives the magnetic fluid to form directional eddy current so as to achieve convective heat exchange on the silicon controlled rectifier, and heat absorbed by the magnetic fluid and air are subjected to heat exchange through the cooling fins. Junction temperature out-of-control caused by local hot spots of the silicon controlled rectifier can be solved, secondary damage of mechanical vibration of a heat dissipation system to welding spots is eliminated, and the highest junction temperature area of the silicon controlled rectifier is focused and cooled according to needs.

The invention discloses an intelligent ring and a health monitoring method and a charging method thereof, and relates to the technical field of intelligent wearable device.The intelligent ring comprises a ring body, the ring body comprises an inner ring, a rechargeable battery, an outer ring and a master controller, and the periphery of the inner ring is provided with the rechargeable battery, a plurality of charging coils electrically connected with the rechargeable battery and a health monitoring module; the main controller is electrically connected with the rechargeable battery; the outer ring is arranged outside the inner ring in a sleeving mode and matched with the inner ring in a sliding contact mode, a plurality of magnets are arranged on the inner circumference of the outer ring in the circumferential direction at intervals, and the magnetic poles of any two adjacent magnets are opposite. Through cooperation of the charging coil and the magnet, charging is carried out through rotation of the outer ring, the endurance of the intelligent ring is prolonged, meanwhile, through cooperation of the charging coil and the electromagnetic coil, wireless charging of the intelligent ring without external contact points is achieved, and the service life of the intelligent ring is prolonged.

The invention discloses a slotless permanent magnet motor based on a Halbach array, and belongs to the technical field of motor design and manufacturing. A rotor of the slotless permanent magnet motor is coaxially arranged in a stator, the stator comprises a stator iron core and a stator winding, the rotor comprises a permanent magnet and a rotor iron core, the permanent magnet is fixed on the outer wall of the rotor iron core and adopts a two-section Halbach array, the permanent magnet is composed of an auxiliary magnetic pole and a main magnetic pole, and an air gap is arranged between the stator iron core and the rotor. The stator winding is suspended in the air gap; during parallel magnetization, the magnetization directions of the permanent magnets of the Halbach array are along the tangential direction of the rotor, the magnetic pole directions are the same, and the main magnetic poles and the auxiliary magnetic poles both adopt a parallel magnetization mode; during radial magnetizing, the magnetizing direction of the permanent magnets of the Halbach array is in the radius direction of the rotor, the polarities of the adjacent permanent magnets are alternately arranged, the main magnetic poles adopt a radial magnetizing mode, and the auxiliary magnetic poles adopt a tangential magnetizing mode. According to the slotless permanent magnet motor, through directional magnetic field superposition of segmented magnetic poles, reverse magnetic leakage is reduced, air gap flux density is improved, and copper loss and iron loss are reduced.

The invention relates to the technical field of underwater propulsion, and discloses an intelligent control method and system for an underwater magnetic coupling propeller. The method comprises the following steps: detecting a magnetic field of a magnetic coupling unit through a Hall sensor array to obtain magnetic flux density distribution data; permanent magnet array hysteresis characteristics are modeled according to the magnetic flux density distribution data, and hysteresis compensation parameters are obtained; inputting the hysteresis compensation parameter into a magnetic field genetic algorithm to optimize magnetic pole configuration to obtain an optimal magnetic pole phase difference; distributing a torque control instruction according to the optimal magnetic pole phase difference to obtain a target excitation current value; the magnetic field is adjusted through the hysteresis compensation PID controller, and magnetic coupling torque output is obtained. By establishing an intelligent control method of hysteresis characteristic accurate modeling, magnetic field genetic optimization and hysteresis compensation PID control, the control precision and transmission efficiency of the magnetic coupling propeller in a complex marine environment are improved.

The invention provides a multi-dimensional adjustable electromagnetic stabilizing device and a hot galvanizing process production line. The multi-dimensional adjustable electromagnetic stabilizing device is used for preventing materials from shaking and comprises a left upper coil assembly, a right upper coil assembly, a left lower coil assembly and a right lower coil assembly. The upper left coil assembly and the upper right coil assembly are located on the two sides of a material respectively, and the lower left coil assembly and the lower right coil assembly are located on the two sides of the material respectively. Each of the left upper coil assembly, the left lower coil assembly, the right upper coil assembly and the right lower coil assembly comprises multiple pairs of pole coils with the same magnetic pole distribution, and the multiple pairs of pole coils are distributed in the width direction of materials; each pair of pole coils is mounted on the transverse moving mechanism; the transverse moving mechanism is mounted on the longitudinal moving mechanism; according to the electromagnetic stabilizing device, shaking of the strip steel is restrained through electromagnetic force, the shaking amplitude of the strip steel can be greatly reduced through an electromagnetic stabilizing system, and due to the non-contact characteristic of the electromagnetic stabilizing system, the strip steel can be stabilized, and scratches to the surface of the strip steel are avoided.

The utility model discloses an arrangement structure of magnets, and relates to the technical field of Halbach array magnet assembly, a plurality of first single magnets are arranged at intervals along the left-right direction, two second single magnets are embedded between adjacent first single magnets, the length and the width of each second single magnet are half of those of each first single magnet, the magnetic pole direction of each first single magnet is upward, and the magnetic pole direction of each second single magnet is upward. The magnetic pole of the second single magnet located on the left side deflects by 45 degrees towards the upper left, and the magnetic pole of the second single magnet located on the right side deflects by 45 degrees towards the upper right; the length and the width of the third single magnets are the same as those of the first single magnets, the arrangement mode of the third single magnets is the same as that of the first single magnets, the two fourth single magnets are embedded between the adjacent third single magnets, the length and the width of each fourth single magnet are half of those of each third single magnet, and the magnetic pole direction of each third single magnet faces upwards; the magnetic pole of the fourth single magnet located on the left side deflects by 45 degrees towards the upper left, and the magnetic pole of the second single magnet located on the right side deflects by 45 degrees towards the upper right. The magnetic field generated by the utility model is more uniform.