303 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 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 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 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.

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.

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.

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 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.

The invention discloses a Halbach array magnetic steel structure, and the structure comprises magnetic steel which is magnetized in the radial direction; the magnetic steel sleeves and the magnetic steel blocks are in one-to-one correspondence, the magnetic steel blocks are installed in the magnetic steel sleeves, the multiple magnetic steel sleeves are distributed along the circumference and form an array circular ring, and the axes of the magnetic steel blocks perpendicularly intersect with the central axis of the array circular ring; the magnetic pole direction of any magnetic steel block deflects around the axis of the magnetic steel block relative to the other magnetic steel block according to a preset angle, and all the magnetic steel blocks arranged in the circumferential direction of the array ring are matched to form a Halbach array. The device has the advantages of being simple in structure, convenient to machine and magnetize, beneficial to saving cost, capable of improving the machining efficiency and convenient to popularize.

The present invention relates to the technical field of motors, in particular to an outer-rotor permanent magnet motor, which includes a fixed base, a stator assembly, a rotor assembly and a rotating shaft assembly. The fixed base includes a fixed connection part and a rotating connection part; the stator assembly includes an inner ring body and a coil assembly arranged on the fixed connection part. The stator assembly includes an inner ring body and a plurality of winding columns arranged on the outer periphery of the inner ring body. A winding groove is provided between two adjacent winding columns; the coil assembly includes winding groups, and the winding groups are wound between two adjacent winding columns; the rotor assembly includes a rotor housing, and a magnetic ring assembly is arranged on the rotor housing facing the stator assembly, and the magnetic ring assembly is a Halbach array magnetic ring. By using the Halbach array magnetic ring as the magnetic ring assembly, the present invention can significantly enhance the magnetic field intensity of the motor, thereby improving the power density and efficiency of the motor.

The invention provides a Halbach array with a double-layer structure. The structure can be divided into an upper layer and a lower layer; the upper layer is a rectangular permanent magnet array, and every four permanent magnet arrays are periodically arranged in a group from left to right along the horizontal direction according to the upper, right, lower and left magnetizing directions; the permanent magnets magnetized up and down are main permanent magnets, the permanent magnets magnetized left and right are secondary permanent magnets, the heights of all the rectangular permanent magnets are equal, the widths of the main permanent magnets are kept consistent, and the secondary permanent magnets are in the same way; the lower layer is a trapezoidal permanent magnet array, the shape is an isosceles trapezoid, the width of the upper bottom is the same as that of the rectangle, regular trapezoids and inverted trapezoids are arranged in a staggered mode in the horizontal direction, the trapezoids and the rectangles are in one-to-one correspondence, and the magnetizing direction is consistent with that of the rectangle in the upper layer; the heights of all the trapezoidal permanent magnets are equal, the sizes of the main permanent magnets are consistent, and the secondary permanent magnets are similar; the shape of the trapezoid main permanent magnet is not limited to be a regular trapezoid or an inverted trapezoid. The double-layer structure permanent magnet array is symmetrically and periodically distributed.

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 invention provides an axial magnetic flux motor which comprises two stators and a rotor, the rotor comprises a rotor iron core and magnetic steel, the two axial sides of the rotor iron core are respectively provided with the magnetic steel composed of a Halbach array, the rotor iron core is formed by winding a silicon steel sheet or pressing an amorphous material, and the rotor iron core is formed by winding the silicon steel sheet or pressing the amorphous material. The magnetic steel on each axial side of the rotor core is opposite to one stator, and an air gap surface is arranged between the opposite magnetic steel and stator, so that the motor has the characteristics that the sinusoidal property of the air gap flux density waveform of the motor is better, the amplitude of the flux density is high, the thickness of the rotor core is small, the torque density is improved, and the like.

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.