375 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 magnet assembly and a preparation method and application thereof, the magnet assembly at least comprises two magnet units, and two adjacent magnet units have different magnetization directions; a welding point exists between every two adjacent magnet units; each magnet unit can be provided with a plating layer or not on the combination surface of two adjacent magnet units, and the plating layer contains other elements except Nd, Fe and B. The magnet unit is characterized in that the combination surface of the magnet unit and the two adjacent magnet units can be provided with a plating layer or not provided with a plating layer. According to the magnet assembly, on the premise that the Halbach array mode of magnet arrangement is not changed, the connection strength of the magnet structure and / or the stability in severe environments such as high temperature and high humidity are / is remarkably improved, and unnecessary loss of magnet performance is avoided. In addition, the preparation method of the magnet assembly also remarkably improves the assembly efficiency of the magnet assembly, and can be widely applied to large-scale production.

An arc path-forming part and a DC relay comprising same are disclosed. The arc path-forming part according to various embodiments of the present disclosure comprises a Halbach array and a magnet part that form a magnetic field in a space formed therein. The magnetic field formed by the Halbach array is stronger in the direction toward the space. The magnetic field formed by the Halbach array and the magnet part forms an electromagnetic force together with the current applied to each fixed contactor. Here, the electromagnetic force formed in the vicinity of each fixed contactor is formed in a direction away from the center of the space or in a direction away from each fixed contactor. Accordingly, a generated arc can be quickly extinguished and discharged by being induced by the electromagnetic force.

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.

The invention discloses a Halbach array type permanent magnet auxiliary synchronous reluctance motor rotor structure, and relates to the technical field of motor rotors. The rotor structure comprises three layers of magnetic barrier structures. The three-layer magnetic barrier structure comprises a first-layer U-shaped structure, a second-layer U-shaped structure and a third-layer double-J-shaped structure; wherein each layer of structure comprises Halbach array segments formed by permanent magnets and air slots which are arranged at intervals, and the included angle between every two adjacent permanent magnets in each layer is a fixed angle. Through the design of the three-layer magnetic barrier structure, each layer of permanent magnet is divided into a plurality of sections, and the magnetizing direction of the permanent magnet is changed by adjusting the included angle between each section of permanent magnet, so that a Halbach array structure is formed, and the torque ripple is reduced.

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 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 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.

The invention belongs to the technical field of mechanical transmission systems, and particularly discloses a method and a system for calculating, regulating and controlling the vibration isolation rate of a rigidity-variable magnetic torsional vibration buffer, and the method comprises the following steps: obtaining a real-time working condition, modeling a single permanent magnet magnetic field by adopting an equivalent magnetic charge method, and calculating the vibration isolation rate of the rigidity-variable magnetic torsional vibration buffer; a magnetic block negative stiffness model and a spring torsion sheet positive stiffness model of the annular Halbach array are constructed, the total coupling stiffness is calculated, the vibration isolation effect of the magnetic torsional vibration buffer is solved, vibration suppression effects and resonance interval distribution under different working conditions are obtained, and based on the vibration isolation effect of the magnetic torsional vibration buffer, the vibration suppression effect of the magnetic torsional vibration buffer is calculated. The gap adjustable mechanism adjusts the rigidity of the spring torsion sheet and the gap of the magnetic ring in real time. By the adoption of the technical scheme, the gap between the inner magnetic ring and the outer magnetic ring is flexibly set according to multi-working-condition requirements, so that applicability and reliability are improved, and low-frequency torsional vibration is effectively restrained while efficient torque transmission is ensured.

The invention discloses a shaftless disc type turbine self-powered flow monitoring device. The device comprises a static assembly, a rotating assembly, a bearing and a data collection module which are coaxially arranged. Magnetic induction coils are distributed in the shell in the circumferential direction; the shell end cover is provided with a guide vane; the turbine comprises shaftless fluid power blades and permanent magnets which are uniformly distributed in the circumferential direction, the magnet yoke is rigidly connected with the impeller assembly, and the permanent magnets are arranged in a Halbach array; the dynamic sealing interface adopts a three-stage labyrinth sealing structure; the blade has an NACA airfoil section; the magnetic induction coil is of a three-layer close winding structure. Self-power-generation is achieved through the electromagnetic induction principle, an external power source is not needed, and cost is reduced; the shaftless design reduces mechanical faults, improves the reliability and prolongs the service life; the data processing module can realize high-precision measurement; a three-stage labyrinth sealing structure prevents fluid leakage; the optimized blade parameters adapt to fluid flow; the design of the permanent magnet assembly and the magnetic induction coil enhances the magnetic field and improves the power generation efficiency and the anti-interference capability.

The utility model discloses a magnetic leveling device of a pendulum bob type laser demarcation device, which comprises a hanging bracket and a pendulum body hung in the hanging bracket, a magnetic damping body consisting of a plurality of magnets is arranged on the hanging bracket according to a Halbach array, and a magnetic field which is made of non-magnetic conductive materials and can cut magnetic lines in a magnetic field generated by the magnetic damping body is arranged on the pendulum body. The utility model aims to provide a damping piece which adopts two different forms of Halbach arrays to generate magnetic damping, and compared with the existing common magnet arrangement scheme, the magnetic flux is obviously enhanced, so that a stronger magnetic damping effect is generated, and the magnetic damping effect is improved. The magnetic leveling device can effectively prevent the swinging body from swinging excessively, so that the leveling time is effectively shortened, the leveling speed and precision of the laser demarcation device are further improved, and the working efficiency is 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 provides a linear Halbach array based on a non-uniform permanent magnet and a preparation method of the linear Halbach array, and belongs to the field of permanent magnets. The method comprises the steps that the interior of a mold is divided into an area A1, an area A2 and an area B, wherein the area A1 and the area A2 are symmetrical on the two sides and concave in an arc shape; the B area is loosely filled with low-grade magnetic powder, and the A1 area and the A2 area are loosely filled with high-grade magnetic powder; carrying out compression molding and magnetization orientation to obtain a neodymium iron boron pressed blank; the neodymium-iron-boron pressed blank is subjected to heat treatment after being demolded to obtain the non-uniform permanent magnet, and the heat treatment comprises preheating, gradient sintering of first heating and then cooling, and tempering treatment; and (2n + 3) groups of non-uniform permanent magnets are adhered and fixed by using magnet glue to obtain the linear Halbach array. According to the non-uniform permanent magnet, the non-uniform permanent magnet is manufactured by adopting different marks of magnetic powder partition mold pressing, region strengthening is carried out on the edge, the demagnetization effect of the magnet at the corner angle under the extreme condition is reduced, the local intrinsic coercive force is improved, the service performance of the magnet is enhanced, and the performance of a Halbach array assembled by the non-uniform permanent magnet is promoted to be more excellent.

To provide a compact lens drive capable of suppressing deterioration of an optical performance and an animation performance.SOLUTION: A lens drive has at least one lens, a lens barrel for holding the lens, and N (N is an integer of 2 or larger) linear motors each composed of a first coil and a second coil for generating drive force in a direction parallel with a light axis of the lens in the lens barrel and a magnet assembly in a Halbach array, at least one of the first coil and the second coil has a bend, and the linear motor is disposed at an interval of 360 / N degrees along a circumferential direction with the light axis of the lens as a center.SELECTED DRAWING: Figure 2

A rotor 2 comprises: a rotor body 3 that rotates about a rotational axis X; a plurality of main magnets 41 and a plurality of auxiliary magnets 42 which are arranged, on a peripheral surface of the rotor body 3, alternatingly in a circumferential direction centered on the rotational axis X; and magnetic bodies 43 that, for main magnets 41 and auxiliary magnets 42 which are adjacent in the circumferential direction, are disposed at at least one of a first position L1 which is between an auxiliary magnet 42 and the rotor body 3 and which is further toward a main magnet 41 than the circumferential direction center C2 of the auxiliary magnet 42 and a second position L2 which is between the main magnet 41 and the rotor body 3 and which is further toward the auxiliary magnet 42 than the circumferential direction center C1 of the main magnet 41. The plurality of main magnets 41 are each magnetized along a radial direction centered on the rotational axis X. The plurality of auxiliary magnets 42 are each magnetized in a direction differing from the radial direction. The plurality of main magnets 41 and the plurality of auxiliary magnets 42 are arranged in a Halbach array such that a magnetic field on the opposite side from the rotor body 3 is stronger than a magnetic field on the rotor body 3 side.

A Halbach array assembling method for a motor rotor, and the motor rotor made using that method, can include assembling pre-magnetized magnets, which have magnetization directions, at selected intervals along a tangential direction of a cylindrical rotary body, assembling non-magnetized magnets, which are not magnetized, between the pre-magnetized magnets, placing a magnetization yoke concentric with the non-magnetized magnets and the pre-magnetized magnets, and generating a magnetic field through the non-magnetized magnets and the pre-magnetized magnets using the magnetization yoke to implement a circular Halbach array by magnetizing the non-magnetized magnets.

The invention belongs to the technical field of coal mine tunneling robots, and discloses a strong magnetism gathering type bilateral excitation magnetic field modulation permanent magnet cutting motor for a coal mine tunneling robot. The motor adopts an outer stator and inner rotor structure, and permanent magnets are arranged on the stator side and the rotor side, so that a bidirectional magnetic field modulation effect is formed, a large number of air-gap magnetic field harmonic waves are generated, and the torque density is greatly improved. In addition, the permanent magnets on the stator side form a Halbach array arrangement and a double-spoke array arrangement. The permanent magnets arranged in the Halbach array have the magnetism gathering effect, and meanwhile, the two side permanent magnets of the Halbach array and the stator permanent magnets at the corresponding side edge positions of the inner side ends of the stator teeth form the permanent magnets arranged in the spoke array, so that the other two magnetism gathering effects are introduced; according to the novel strong magnetism gathering type permanent magnet arrangement mode, the magnetomotive force of the permanent magnets on the stator side can be greatly improved, and the torque density is improved. And meanwhile, the stator permanent magnets at the edge parts of the inner side ends of the stator teeth also have a pole changing effect, so that the torque density is higher.

This invention provides a vibration motor. The vibration motor includes a housing with a containment space, a vibration component, and a stator component. The vibration component includes a mass block, a magnet assembly fixed to the mass block, and an elastic component supporting the mass block in the containment space. The magnet assembly includes a magnet fixed to the mass block, which has a magnetized magnetic circuit with a Halbach array structure. By designing the magnetized magnetic circuit in a Halbach array manner, the complex distribution of magnetic pole enhances the magnetic field performance of the magnet assembly and significantly increases the driving force of the vibration motor, providing users with strong vibration feedback and enhancing user experience.

The invention discloses a Halbach array type permanent magnet motor rotor structure for a new energy vehicle, and relates to the technical field of new energy vehicle synchronous motors. And a second layer of No.1 permanent magnet, a second layer of No.2 permanent magnet, a second layer of No.3 permanent magnet, a second layer of No.4 permanent magnet, a second layer of No.5 permanent magnet, a second layer of No.6 permanent magnet and a second layer of No.7 permanent magnet are fixedly mounted on the inner side wall of the rotor silicon steel sheet. The number of effective magnetic poles of the rotor can be increased through the double-layer structure, magnetic leakage of a magnetic field in air gaps can be reduced, the efficiency of the motor is improved, the magnetizing angles of the permanent magnets are different, the magnetic field is more concentrated in a needed area through the design of the magnetic poles with different widths, and the uniformity of the magnetic field is further improved. And the magnetic field fluctuation during the operation of the motor is effectively reduced.

The invention provides an amorphous alloy permanent magnet motor, and relates to the technical field of energy-saving permanent magnet motors, and the motor comprises a housing, a rotating shaft, a stator iron core, a rotor iron core, and permanent magnets. The stator iron core is formed by axially laminating a first silicon steel laminated iron core part and a first amorphous alloy iron core part in a staggered manner, and the rotor iron core is formed by axially laminating a second silicon steel laminated iron core part and a second amorphous alloy iron core part in a staggered manner. An even number of groups of permanent magnets are embedded in the rotor core in the radial direction, and each group of permanent magnets comprises two V-shaped magnetic pole parts to form an annular Halbach array. Each magnetic pole part comprises first, second and third permanent magnet sections which are linearly connected, and the magnetizing directions of the permanent magnet sections are respectively vertical, parallel and deviated from the V-shaped included angle. Magnetic field distribution is optimized, magnetic flux abrupt change is reduced, and motor efficiency and power density are improved. The magnetic saturation intensity can be increased while the size is reduced, and the energy-saving effect of the permanent magnet motor is improved.

The invention belongs to the technical field of gear transmission systems, and particularly discloses a rotating speed, torque and vibration isolation rate self-sensing method and system for a Halbach magnetic coupler and the Halbach magnetic coupler. The real-time acceleration of the position of the sensor rotating along with the coupling is measured, a vibration acceleration component and an angular acceleration component in the real-time acceleration are filtered out, a gravitational acceleration component with the frequency consistent with the rotating frequency of the coupling is obtained, and the angular velocity and angle information of the Halbach magnetic coupling are obtained; and comparing the angle difference between the two connecting shafts of the magnetic coupling, and calculating the torque and the vibration isolation rate of the magnetic coupling at the current moment by using the angle difference at each moment and the inherent parameters of the coupling. By the adoption of the technical scheme, the torque transmitted by the current annular Halbach array magnetic coupler and the vibration isolation rate of the current annular Halbach array magnetic coupler are calculated, and self-sensing of the rotating speed, the torque and the vibration isolation rate of the annular Halbach array magnetic coupler is achieved.

A self-energized rotating part state monitoring device based on a high-power energy capture structure comprises an energy acquisition structure arranged on a rotating part, current output by the energy acquisition structure and a torque signal output by a strain gauge are processed by an independent research and development integrated device and then sent to a wireless signal receiving and processing module, and the wireless signal receiving and processing module is connected with the rotating part. The wireless signal receiving and processing module is connected with the state monitoring module; the energy acquisition structure is connected with the main control module through the energy acquisition circuit and the power management circuit, a signal generated by deformation of the strain gauge is connected with the main control module through the torque sensing conditioning circuit, and the main control module is connected with the wireless signal receiving and processing module through the wireless transceiver module; the energy collection structure adopts a halbach array and a specific arrangement mode, rotation kinetic energy is converted into more electric energy in unit volume, power is supplied to the monitoring part of the rotating part, and then sustainable self-energy supply for health monitoring of the rotating part is achieved.

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 a thin optical anti-vibration motor, a camera module and electronic equipment. The thin optical anti-vibration motor comprises a shell assembly, a focusing module and an anti-vibration module, the focusing module comprises a focusing carrier, a focusing coil and a focusing magnet group; the focusing magnet group comprises at least three focusing magnets arranged in a Halbach array; the anti-shake module comprises an anti-shake carrier and an anti-shake driving assembly, wherein the anti-shake carrier is movably connected with the focusing carrier through supporting balls arranged in a single layer, and the anti-shake driving assembly comprises an X-axis driving unit, a Y-axis driving unit and a displacement detection assembly. The displacement detection assembly comprises two Hall integrated circuits. According to the anti-shake module, the supporting balls which are arranged in a single-layer mode are adopted as connecting media, the overall height of the motor is reduced, the motor has more advantages in space utilization, the motor can better adapt to equipment with strict space size requirements, meanwhile, the assembling procedures and the number of needed components are reduced, the production cost is reduced, and the market competitiveness is improved.

The invention discloses a VCM structure, a lens and a shooting device, and relates to the technical field of VCM structures, the VCM structure comprises a magnetic circuit structure and a coil assembly, the magnetic circuit structure comprises a magnet yoke assembly and a magnet assembly, the magnet yoke assembly forms a mounting cavity with an opening facing a first direction, and the magnet assembly is arranged in the mounting cavity. The magnet assembly comprises a plurality of magnet groups which are sequentially arranged in the second direction, each magnet group comprises four magnets which are sequentially arranged in the second direction, the magnetizing directions of the four magnets are distributed according to a Halbach array and are all perpendicular to the first direction, the magnetizing directions of the two magnets are opposite and are consistent with the second direction, and the magnetizing directions of the four magnets are perpendicular to the first direction. The coil assembly is movably arranged in the installation cavity in the second direction, and when the coil assembly is powered on and acts with the magnet assembly, the coil assembly can move in the second direction. The VCM structure in the scheme is high in magnetic field intensity, uniform in magnetic field distribution and wide in applicability, and the stroke can be changed according to requirements.

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 invention belongs to the field of magnetic attraction devices, and provides a light-weight large-load dynamic magnetic attraction device of a climbing robot and a control method of the light-weight large-load dynamic magnetic attraction device in order to solve the problem that an electromagnetic attraction robot is poor in stability. The lightweight heavy-load dynamic magnetic adsorption device for the climbing robot comprises a permanent magnet protection mechanism and a magnetic adsorption wheel, the magnetic adsorption wheel is arranged at the tail end of a climbing execution mechanism of the climbing robot; the magnetic adsorption wheel comprises a flexible wheel surface, and a Halbach array electromagnet is wrapped in the flexible wheel surface; the Halbach array electromagnet is used for generating magnetic field intensity when the coil is electrified, so that the magnetic adsorption wheel is adsorbed on the steel structure; the magnetic adsorption wheel is also provided with a magnetic field intensity detection module; the magnetic field intensity detection module is connected with the control module; and the permanent magnet protection mechanism is connected with the control module. The energy efficiency requirement under the high-load condition can be met, and meanwhile more complex task adaptation and environment sensing capacity are achieved.