168 results about "Magnetic barrier" patented technology

The invention provides a rotor iron core, a permanent magnet motor and an inverter compressor, and relates to the technical field of motor and compressor design and manufacture, the rotor iron core comprises uniformly distributed permanent magnet grooves, a groove is arranged between two adjacent permanent magnet grooves, each groove extends inwards along the radial direction of the rotor iron core, parallel magnetic bridges are arranged between the grooves and the permanent magnet grooves, and the permanent magnet grooves are connected with the parallel magnetic bridges. A first magnetic barrier groove, a second magnetic barrier groove and a third magnetic barrier groove which are symmetrically distributed are formed in the two sides of the top of each permanent magnet groove respectively, a first arc and a second arc are arranged on the outer side of the rotor core above the magnetic barrier grooves, the second arc intersects with the side edge of the groove, and permanent magnets with alternating magnetism are embedded in the permanent magnet grooves. The radius Rr of the outer side of the rotor iron core, the distance ho from the middle point of the bottom of the permanent magnet groove to the center point of the rotor iron core and the thickness hm of the permanent magnet meet the condition that (Rr-ho) / hm is larger than 2 and smaller than or equal to 3.4. By reasonably arranging the position and the size of the magnetic barrier groove, magnetic circuit distribution can be changed, magnetic flux leakage can be reduced, the power density of the motor can be increased, and electromagnetic vibration noise of the motor and the compressor can be reduced.

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 a motor, a compressor and refrigeration equipment, the motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a plurality of stator punching sheets stacked in the axial direction, the rotor assembly is located at the radial inner side of the stator assembly, and the rotor assembly comprises a plurality of rotor punching sheets stacked in the axial direction. The rotor punching sheet is provided with a plurality of magnetic steel groove groups which are circumferentially arranged at intervals, each magnetic steel groove group is internally provided with magnetic steel with the same magnetic pole, the magnetic poles of the magnetic steel in two adjacent magnetic steel groove groups are opposite, and the radial outer side of each magnetic steel groove group is provided with a magnetic barrier group. And each groove is arranged between two adjacent magnetic steel groove groups, so that the distribution of a magnetic field is changed, the magnetic field is more uniform, the iron loss is reduced, the torque is improved, the stator saturation is relieved, the rotor magnetic field is fully utilized, harmonic waves are reduced, and the efficiency is further improved.

The present invention discloses an asymmetric rotor structure of a permanent magnet-assisted bearingless synchronous reluctance motor. Four groups of U-shaped magnetic barriers are evenly arranged along the circumferential direction inside the rotor. Each group of U-shaped magnetic barriers is divided into an outer layer, a middle layer, and an inner layer. The openings of the three layers of magnetic barriers face outward, and a permanent magnet is embedded in the center of the bottom wall of each layer of magnetic barriers. The outer and middle layers of magnetic barriers are symmetrical about the d-axis. One of the outer sections of the U-shaped side walls of the inner layer of magnetic barriers extends a small rectangular magnetic barrier parallel to the q-axis in the q-axis direction at the end facing the q-axis. A first small rectangular permanent magnet is fixedly embedded in the small rectangular magnetic barrier. A second small rectangular permanent magnet perpendicular to the first small rectangular permanent magnet is fixedly embedded in the outer section of the U-shaped side wall with the small rectangular magnetic barrier, forming a rotor topology in which both the magnetic barriers and the permanent magnets are asymmetric. The reluctance torque and the permanent magnet torque reach peak values ​​at similar or even the same current angles, thereby increasing the output torque synthesized by the reluctance torque and the permanent magnet torque.

The invention discloses an asymmetric permanent magnet auxiliary synchronous reluctance motor rotor structure for a new energy vehicle, and relates to the technical field of motor rotor structures, the asymmetric permanent magnet auxiliary synchronous reluctance motor rotor structure comprises an asymmetric rotor, the right side of the front part of the asymmetric rotor is connected with a first outer side air slot A, and the left side of the first outer side air slot A is provided with a second outer side air slot A; and the bottom side of the second outer side air slot A is connected with a second outer side air slot B. The rotor has the advantages that by constructing a phase coordination mechanism of an asymmetric magnetic circuit topology, optimization of current phase angle difference of permanent magnet torque and reluctance torque is realized, the comprehensive performance of the motor is further improved, the rotor adopts a composite configuration of a double-layer U-shaped magnetic barrier and a spoke type magnetic barrier, and the rotor is more compact in structure and more compact in structure. Differentiation configuration is carried out on permanent magnet space distribution based on the axis asymmetry principle, so that phase cooperation of the maximum value of the reluctance torque and the maximum value of the permanent magnet torque is achieved, and the dual optimization objectives of torque density improvement and pulsation suppression are achieved.

The invention relates to the technical field of motors, in particular to a winding function enhanced wide-area high-efficiency permanent magnet brushless motor and a design method thereof.The winding function enhanced wide-area high-efficiency permanent magnet brushless motor comprises a stator, a rotor and a rotating shaft, the rotor and the rotating shaft are concentrically connected through a key, and the rotor is sleeved with the stator; the stator and the rotor are formed by laminating silicon steel sheets with the same thickness, and the rotating shaft is made of a non-magnetic material; a plurality of pairs of neodymium iron boron permanent magnets are uniformly and fixedly embedded on the rotor along the circumferential direction; an outer arc-shaped segmented magnetic barrier, an elliptical magnetic barrier and an inner arc-shaped segmented magnetic barrier are respectively arranged between two adjacent pairs of neodymium-iron-boron permanent magnets; the outer arc-shaped segmented magnetic barrier, the elliptical magnetic barrier and the inner arc-shaped segmented magnetic barrier are sequentially arranged from outside to inside; each pair of neodymium-iron-boron permanent magnets is composed of two rectangular neodymium-iron-boron permanent magnets, the two rectangular neodymium-iron-boron permanent magnets are arranged in a V shape, and the opening of the V shape faces the air gap. On the basis of a winding function enhancement principle, winding arrangement is determined, direct-axis inductance is improved, and therefore the speed regulation range is widened.

The invention provides a logarithmic spiral motor design method, belongs to the technical field of spiral motor design, and designs logarithmic spiral electromagnetic topology, fuses a plurality of materials, constructs an integrated structure body, and sets an intelligent regulation and dynamic matching control mode. Firstly, a magnetic flux path is optimized, magnetic flux is naturally distributed in the tangential direction of a spiral line by utilizing the characteristic that the curvature of the spiral line is continuously increased or decreased, edge magnetic flux distortion is reduced, then near-field coupling is enhanced, and the magnetic flux superposition phase difference between adjacent spiral units is controlled by adjusting spiral line parameters. The double targets of active enhancement of effective magnetic flux and suppression of magnetic leakage are achieved. Through deep fusion of geometric characteristics and electromagnetic laws of logarithmic spiral lines, pole slot limitation and loss bottlenecks of a traditional motor are broken through, through a logarithmic spiral line electromagnetic topology design normal form, geometric curvature and magnetic field distribution are quantitatively associated, and through a conductive, magnetic conductive and heat dissipation composite winding and an intelligent magnetic barrier structure, multi-field collaborative optimization is achieved.

The invention provides a rotor punching sheet, a rotor iron core, a rotor, a motor and an air conditioner, the rotor punching sheet is provided with more than two magnetic pole forming areas corresponding to rotor magnetic poles, and each magnetic pole forming area is internally provided with a magnetic steel groove which is arranged on a q axis and extends along the radial direction; the rotor punching sheet is provided with a first magnetic barrier groove located on the d axis between every two adjacent magnetic steel grooves. Wherein first magnetic bridges are formed between the first magnetic barrier grooves and the adjacent magnetic steel grooves on the two sides, and the width of each first magnetic bridge is gradually increased in the radial outward direction of the rotor punching sheet. According to the technical scheme of the invention, the magnetic lines of force can be gradually drawn close to the d axis from the two sides of the d axis, and the sinusoidal property of the magnetic flux in the air gap is better, so that the torque pulsation of the tangential motor can be reduced.

The invention discloses a rotor and a synchronous reluctance motor with the same. In the invention, the rotor has an even number of magnetic barrier structures, each magnetic barrier structure comprises a plurality of arc-shaped magnetic barrier layers, the plurality of arc-shaped magnetic barrier layers of each magnetic barrier structure have the same symmetry axis, each arc-shaped magnetic barrier layer comprises five sections of magnetic barriers, two sections of outermost magnetic barriers are mutually symmetrical about the symmetry axis, and two sections of middle magnetic barriers are mutually symmetrical about the symmetry axis. A section of the innermost magnetic barrier is symmetrical about the symmetry axis, so that the reluctance torque of the motor can be fully utilized to improve the output performance of the motor by means of the design of the multiple layers of magnetic barriers with the same symmetry axis. In addition, the two outermost magnetic barriers are not filled with magnetic substances, so that the magnetic substances are far away from the stator winding to reduce the risk of demagnetization of the magnetic substances.

The invention relates to the technical field of motors, in particular to a magnetic conductance motor adopting a magnetic conductance reinforcing material, which comprises a stator assembly and a rotor assembly which are concentrically arranged, and the rotor assembly is arranged in the stator assembly. The stator assembly is formed by radially positioning and splicing 12-24 silicon steel sheet inserts through a dovetail joint structure, traditional lamination gap loss is eliminated, T-shaped teeth (iron-nickel-based magnetically soft alloy 1J34 / 1J36) which are deeply embedded (1 / 3-1 / 2 of the tooth height) are combined, the magnetic circuit conduction efficiency is remarkably optimized through the high magnetic conductivity (larger than or equal to 60,000 H / m) and the saturation flux density (larger than or equal to 1.5 T), and the magnetic saturation risk is avoided; a non-magnetic stainless steel base body (304 / 316) is adopted on the rotor side to block a stray magnetic circuit, and a low-loss magnetic field closed loop is formed by matching the magnetism gathering design of a V-shaped neodymium iron boron insert (Br is larger than or equal to 1.2 T, Hc is larger than or equal to 900 kA / m, and the included angle is 60-90 degrees) and directional magnetism conduction of a 20-30-degree fan-shaped angle magnetic barrier insert, so that the purposes of high efficiency, low consumption, high reliability and low cost are achieved.

The invention discloses a manufacturing process of a radial magnetic flux cylinder type motor iron core, and particularly relates to the technical field of motor iron core manufacturing, and the manufacturing process comprises the steps: employing magnetron sputtering to construct a gradient insulation coating on the surface of a nanocrystalline strip, and enabling the gradient insulation coating and silicon steel sheets to be alternately laminated to form a magnetic conduction-bearing composite structure; a yoke bionic honeycomb runner and a tooth magnetic barrier groove are machined through femtosecond laser, and magnetothermal coupling optimization is achieved; multidirectional progressive stamping forming is conducted in the pulsed magnetic field environment, and grain directional arrangement and interface metallurgical bonding are achieved in combination with femtosecond laser micro-connection; the integrated eddy current detection system regulates and controls press fitting parameters in real time, and stress regulation and control are completed through two-stage microwave annealing and ion beam treatment. According to the method, the magnetic circuit efficiency and the heat dissipation performance of the iron core are effectively improved, through material-structure-process collaborative innovation, the problems of magnetothermal imbalance, grain disorder, assembly accumulative errors and the like in traditional manufacturing are solved, and the operation stability and the service life reliability of the iron core under the high-frequency and high-load working condition are remarkably improved.

The invention discloses a hybrid magnetic barrier design method for improving the average torque of a permanent magnet generator, the motor type is a double permanent magnet vernier motor, a stator and a rotor are provided with permanent magnets, the stator is wound with an armature winding, and an air gap magnetic field is composed of a stator permanent magnet magnetic field, a rotor permanent magnet magnetic field and an armature magnetic field. The average torque is derived from the interaction of an armature magnetic field and stator and rotor permanent magnetic fields. The stator is composed of six E-shaped module units in space, non-air-gap magnetic barriers exist between the module units, air-gap magnetic barriers are added to the two sides of a permanent magnet of the stator and the two sides of a permanent magnet of the rotor respectively, and the average torque is improved by improving the working wave content of an armature magnetic field and the working wave content of a permanent magnet magnetic field through the two types of magnetic barrier structures respectively. The hybrid magnetic barrier is simple in structure, the average torque of the permanent magnet vernier motor can be improved by more than 30%, and meanwhile, the sine property of no-load back electromotive force is improved.

The application discloses a minimum direct-axis flux linkage approximation type permanent-magnet flat wire driving motor and a design method thereof. Eight permanent-magnet groups and eight irregular rectangular magnetic barriers are uniformly arranged on the rotor in the circumferential direction. Each permanent-magnet group is symmetric along the d-axis, and each irregular rectangular magnetic barrier is symmetric along the q-axis. Each permanent-magnet group on the radial cross section is composed of two outer layer permanent magnets and one inner layer permanent magnet. The inner layer permanent magnet is perpendicular to the d-axis. An L-shaped magnetic barrier is arranged between the end of the outer layer permanent magnet on the same side of the d-axis and away from the d-axis and the end of the inner layer permanent magnet. The leakage magnetic component is introduced into the direct-axis flux linkage. The direct-axis flux linkage amplitude is calculated based on the direct-axis flux linkage. The key structure parameters and ranges are determined according to the direct-axis flux linkage amplitude. The key structure parameters are optimized by selecting typical working condition representative points. The optimal key structure parameters are obtained according to the minimum direct-axis flux linkage amplitude approximation 0. The widening of the constant power speed regulation range is realized. The multi-target requirements under different working conditions are met.

The invention discloses a permanent magnet motor based on an auxiliary winding and a temperature detection method, the permanent magnet motor comprises a rotor iron core, a stator iron core is coaxially arranged in the rotor iron core, and a gap is arranged between the rotor iron core and the stator iron core; the rotor permanent magnets are circumferentially arranged along the axis of the rotor iron core; a stator yoke disposed on the stator core; the plurality of stator armature teeth are arranged along the outer wall of the stator yoke, and an armature winding is wound on each stator armature tooth; the stator modulation teeth are of a structure with one open end and one blocked end, the blocked ends of the stator modulation teeth are connected to the end parts of the stator armature teeth, and the open ends of the stator modulation teeth face the rotor permanent magnets; the magnetic barriers are arranged on the stator modulation teeth; and the stator auxiliary teeth are arranged in the open ends of the stator modulation teeth, auxiliary windings are wound on the outer sides of the stator auxiliary teeth, and the stator auxiliary teeth are connected with the stator modulation teeth through auxiliary magnetic bridges. By monitoring the change of the counter electromotive force of the auxiliary winding along with the temperature of the permanent magnet, the temperature information of the permanent magnet can be indirectly and accurately obtained.

The present invention relates to the technical field of synchronous reluctance electric motors. Provided are a wound radial laminated rotor structure of a synchronous reluctance electric motor and a design method. The rotor structure comprises a rotor support, a rotor core, a fixing bolt and a pressing block, wherein the rotor core is formed by alternatingly and radially laminating magnetically-conductive layers and non-magnetically-conductive layers, the rotor core is fixed to the rotor support by means of the fixing bolt and the pressing block, the ratio of the thickness of the magnetically-conductive layer to the thickness of the non-magnetically-conductive layer is smaller than 5:1, the magnetically-conductive layers and the non-magnetically-conductive layers of the rotor core are of a concentric circle structure, the magnetically-conductive layers and the non-magnetically-conductive layers of the rotor core are wound to form a circular ring, and the rotor core is divided into parts with the same number as poles of the electric motor by means of a separation process. The rotor structure breaks through a traditional axial structure, no air magnetic barrier is present on the rotor, and the rotor structure is connected to a high-strength support by means of a high-strength bolt, thereby achieving high mechanical strength, and adapting to a high-speed synchronous reluctance electric motor product.

The application discloses an armature enhanced modular stator vernier permanent magnet motor, belongs to the motor field, and applies a stator magnetic barrier to the vernier permanent magnet motor as a modulation unit of an armature winding, breaks the original understanding of the magnetic barrier through a physical concept, and the stator magnetic barrier can enhance the cross-linking capacity of the armature winding to an excitation magnetic field, simultaneously enhances the magnetic motive force of multiple working armatures of the vernier permanent magnet motor, and thus increases the torque density of the motor; and a split tooth structure is adopted for the first stator tooth, the end length of the winding is shortened, and the motor volume is reduced; in addition, the magnetic barrier shape with the air gap side width being greater than the non-air gap side width can increase the first stator slot area without influencing the air gap structure, more windings are placed, and the torque density of the motor is further improved.

The invention discloses an axial flux permanent magnet synchronous reluctance motor rotor based on modular harmonic counteracting, the rotor is designed in a three-in-one mode of structure modularization, magnetic barrier gradient and phase computable dislocation, a rotor assembly is formed by splicing N fan-shaped rotor modules along the circumference, and the adjacent modules are provided with optimal dislocation angles calculated according to the harmonic counteracting principle. The sum of target harmonic magnetic field vectors generated by each module is zero; a U-shaped magnetic barrier array of which geometric parameters are monotonically changed in a gradient manner is arranged in the fan-shaped rotor module, and a permanent magnet group is embedded in the fan-shaped rotor module; main electromagnetic harmonic waves are offset from the source, magnetism gathering and resistance increasing functions are decoupled, the mechanical robustness and the electromagnetic performance of the motor are improved, meanwhile, overall machining is converted into standardized module assembling, the manufacturing cost and the maintenance difficulty are reduced, different motor pole numbers can be flexibly adapted, and the service life of the motor is prolonged. The method is suitable for high-end application scenes such as new energy automobiles, industrial driving and aerospace.

The invention discloses a rotor structure optimization design method of a low-harmonic synchronous reluctance motor, and belongs to the technical field of synchronous reluctance motors. Comprising the following steps that 1, a rotor is divided into N sectors, each sector comprises a magnetic barrier area and a non-magnetic barrier area, an equivalent magnetic circuit model of air gap flux density and a magnetic barrier position is constructed, and an optimization function is defined; 2, carrying out constraint condition mathematical modeling; 3, performing multi-parameter collaborative optimization by adopting a particle swarm optimization method; and step 4, generating the size of the rotor punching sheet according to an optimization result. In the rotor structure optimization design method of the low-harmonic synchronous reluctance motor, a mathematical relationship between magnetic barrier distribution and harmonic content is established based on a particle swarm optimization method, and the rotor punching sheet structure is optimized, so that air gap flux density harmonics can be remarkably reduced, and the problems of high harmonic content, low efficiency, unstable operation and the like of an existing synchronous reluctance motor are solved; by optimizing the rotor structure, the performance and reliability of the motor are improved, and vibration and noise are reduced.

The invention provides a rotor structure and a motor, magnet grooves comprise two first magnet grooves and two second magnet grooves which are communicated with each other, the two second magnet grooves are located between the two first magnet grooves, and two sides of a D shaft of a magnetic pole are respectively provided with one first magnet groove and one second magnet groove; a first V-shaped groove with an opening deviating from the central point of the rotor core is formed between the two second magnet grooves, and a second V-shaped groove with an opening facing the central point of the rotor core is formed between the adjacent first magnet groove and the second magnet groove; wherein a plurality of magnetic barrier holes are formed between the first V-shaped grooves and the outer peripheral wall of the rotor core, and a plurality of auxiliary grooves are formed in the outer peripheral wall, corresponding to the second V-shaped grooves, of the rotor core; while the high salient pole ratio is ensured, the cogging torque is reduced, magnetic flux leakage and higher harmonics are inhibited, and meanwhile, the power density and efficiency of the motor are not influenced.

The utility model relates to a motor base structure with low eddy current loss, which comprises a cast iron base, a plurality of notches are uniformly distributed on an inner cylinder of the cast iron base, an aluminum magnetic isolation strip is mounted in each notch in a matched manner, and a single aluminum magnetic isolation strip is flat and completely attached to the notch; a driving end machine cover mounting lug, a lead wire lapping area, an iron core area, a fan area and a non-driving end machine cover mounting lug are sequentially arranged on the cast iron machine base in the axial direction, the aluminum magnetic isolation strip is mounted in the iron core area, and mounting ground feet are arranged at the bottom of the cast iron machine base. The motor base is compact and reasonable in structure and convenient to operate, the problem that the cast iron base generates a large amount of eddy current loss in a high-frequency alternating magnetic field can be effectively solved through the design that the magnetic strips are arranged in the cast iron base, meanwhile, the heat dissipation problem of the base can be met, and the working reliability of the whole motor base is greatly improved.

The utility model relates to a five-phase permanent magnet auxiliary synchronous motor, which structurally comprises a stator iron core and a rotor iron core, 40 stator teeth and 40 stator slots are alternately arranged on the stator iron core, the stator iron core is in a single-layer winding layout, a stator circuit is a five-phase winding, each winding part is provided with four slots, and two coil groups connected in series are formed. Six groups of V-shaped embedded permanent magnet structures are uniformly arranged on the rotor core, each group of V-shaped embedded permanent magnet structures is provided with magnetic barriers, the magnetic barriers comprise a left magnetic barrier, a middle magnetic barrier and a right magnetic barrier, and two permanent magnets are embedded in each group of V-shaped embedded permanent magnet structures to form a magnetic pole unit; the two permanent magnets in each magnetic pole unit are a permanent magnet A and a permanent magnet B which are symmetrical and form an included angle of 130 degrees. The motor provided by the utility model has the advantages that through the reasonably designed stator circuit and rotor assembly structure, the torque pulsation and the suspension force pulsation during the operation of the motor can be reduced, thereby improving the performance and the stability of the motor, and improving the production efficiency.

The utility model relates to a synchronous reluctance motor, which comprises a stator core and a rotor core, the stator core is sleeved on the periphery of the rotor core, a gap is reserved between the stator core and the rotor core, a plurality of stator tooth grooves are uniformly arranged on the surface of the stator core along the circumferential direction, windings are arranged in the stator tooth grooves, and ferrite is embedded in magnetic barrier grooves. A plurality of second through grooves are evenly distributed along the circumference of the rotor core, one side of each second through groove is communicated with the corresponding magnetic barrier groove, the other side of each second through groove penetrates to the outer side of the rotor core, a plurality of first through grooves penetrating through the inner side and the outer side of the stator core are formed in the stator core, and connecting grooves are communicated between the stator tooth grooves and the first through grooves. The outer side of the rotor core is uniformly connected with a plurality of fan blades along the circumferential direction of the rotor core. According to the utility model, heat generated during operation of the rotor and the stator can be effectively dissipated, and the aging process of each part of the motor is prevented from being accelerated due to a high-temperature environment generated during continuous operation, so that the service life of the whole system is prolonged.

The invention discloses a rotor assembly, a motor and electric equipment, and relates to the technical field of permanent magnet motors, the rotor assembly comprises a rotor core and a permanent magnet assembly, the rotor core is provided with a magnetic barrier structure, the permanent magnet assembly is arranged on the rotor core, the permanent magnet assembly comprises first permanent magnets and second permanent magnets, and the second permanent magnets are located between two adjacent first permanent magnets; the magnetic barrier structure is located between two adjacent first permanent magnets and is located on one side, facing the edge of the rotor core, of the second permanent magnet. The invention aims to inhibit the quadrature-axis armature reaction through the rotor assembly and improve the motor performance.

The invention discloses a high-speed torque motor based on magnetic circuit optimization and a control method thereof, and relates to the technical field of motors, the motor comprises a motor body and a control system, and the control system is electrically connected with the motor body; the motor body comprises a stator, a rotor and a winding, and the rotor is located on the inner side of the stator and corresponds to the stator; the winding is embedded in a stator groove, and the winding is a six-phase centralized winding. According to the invention, the high-speed torque output of the motor is effectively improved through the collaborative design of the arc-shaped magnetic barrier structure of the stator, the stepped magnetic conductance grooves of the rotor and the six-phase alternating-current and direct-current superposition windings in combination with a dynamic control method based on a magnetic circuit saturation state. The efficiency of the motor in high-speed operation is ensured; and by optimizing the rotor structure and combining the dynamic adjustment of the control system, the vibration level of the motor during high-speed operation is effectively reduced, and the torque pulsation is controlled within a relatively low range, so that the operation stability of the motor is improved.

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

This invention discloses a magnetically decoupled permanent magnet motor with axial active and radial passive levitation, belonging to the field of magnetic levitation motor technology. The magnetic levitation motor includes an axial stator disk assembly, an axial stator sleeve, and a motor unit. The motor unit has a radial air gap, and an axial air gap exists between the motor unit and the axial stator sleeve. The axial air gap contains axial bias flux and axial control flux, while the radial air gap contains torque flux. The rotor's axial translational degree of freedom is actively controlled, while the four radial degrees of freedom are passively stabilized. The axial levitation force and torque are naturally decoupled and independently controlled. The rotor in the motor unit of this invention adopts a "V"-shaped alternating pole structure with built-in permanent magnets, and the rotor core has air magnetic barriers, which improves the utilization rate of permanent magnet materials and the motor's torque output capability, while reducing costs.

The invention discloses a reluctance rotor design method based on a streamline magnetic barrier and a motor, and belongs to the field of synchronous reluctance motors, a reluctance rotor comprises a magnetic barrier main body, a low-magnetic-conductance tail part and a separated magnetic island, and the design method comprises the following steps: drawing the streamline magnetic barrier main body according to the direction of a magnetic line of force of a d-axis magnetic field by taking increase of d-axis inductance and reduction of q-axis inductance as targets; in order to reduce the magnetic flux leakage of the rotor and reduce the influence on a d-axis magnetic circuit at the same time, the tail part of the magnetic barrier is subjected to narrow opening design, and the endpoint of the magnetic barrier main body and the endpoint of the magnetic barrier tail part are connected through a straight line or an arc to form a low-magnetic-permeability magnetic barrier tail curve; taking all design parameters of the rotor as optimization variables, selecting proper optimization targets and constraint conditions, establishing an optimization problem, and solving the optimization problem to obtain optimal design parameters; and selecting a new material or process mode to realize the integrity of the rotor, and completing the design of the reluctance motor based on the streamline magnetic barrier. According to the invention, the dq-axis reluctance difference can be increased, the salient pole ratio is improved, and the torque output capability of the synchronous reluctance motor is improved.

The present disclosure provides a permanent magnet synchronous motor and a rotor pressing plate thereof. The pressing plate body of the rotor pressing plate is made of a material with a magnetic permeability greater than a threshold value. The pressing plate body is provided with through holes corresponding to each permanent magnet on the rotor core. The pressing plate body and the rotor core are axially overlapped by a target angle, so that part of each permanent magnet overlaps with the pressing plate body. The leakage magnetic area of the pressing plate body is provided with a magnetic barrier for blocking the leakage magnetic path of the permanent magnet through the rotor pressing plate. The present disclosure axially overlaps the pressing plate body and the rotor core by a target angle, and sets a magnetic barrier in the leakage magnetic area of the pressing plate body, thereby effectively reducing the rotor end leakage, avoiding a significant drop in back electromotive force, and ensuring the torque output of the motor under the same current excitation.

The application relates to a brushless synchronous motor rotor with built-in distributed magnetic barriers, which comprises a rotor core, an excitation winding and a damping winding, the rotor core is provided with a plurality of magnetic poles, the magnetic poles comprise pole bodies and pole shoes, the pole shoe surfaces are provided with damping grooves, the excitation winding is wound on the pole bodies, and the damping winding is arranged in the damping grooves; the rotor core pole shoes are provided with rotor magnetic barriers, the rotor magnetic barriers comprise cross-axis magnetic barriers and direct-axis magnetic barriers, the cross-axis magnetic barriers are arranged along the radial direction of the rotor core and are connected with the damping grooves, and the direct-axis magnetic barriers are arranged on both sides of the pole shoes. The application is innovative in that the distributed magnetic barriers are arranged in the brushless synchronous motor rotor for the first time to improve the output power quality. The basic principle is that by arranging the magnetic barriers at key positions of the rotor, the cross-axis and direct-axis magnetic resistances are increased, the negative sequence reactance is reduced, the generator anti-unbalanced load capacity is improved under the unbalanced load working condition, and the total harmonic content of the generator output voltage is reduced under the balanced load working condition. Since the magnetic barrier medium density is smaller than the core material density, the weight of the generator with the built-in rotor magnetic barriers is reduced, and the power density is increased.

The invention provides a rotor structure and a motor. The rotor structure comprises a rotor core (2) and permanent magnets (6), magnetic barrier layers (1) and magnetic steel grooves (5) are arranged on the rotor core (2), the multiple magnetic barrier layers (1) are arranged at intervals in the d-axis direction, each magnetic barrier layer (1) comprises an air groove (4) and a filling groove (7), each filling groove (7) comprises q-axis filling grooves (71) located on the two sides of the corresponding air groove (4), and the magnetic steel grooves (5) are located on the radial outer sides of the magnetic barrier layers (1) in the d-axis direction. The permanent magnets (6) are arranged in the magnetic steel grooves (5), under one pole, the radial center line of each permanent magnet (6) forms an offset angle delta relative to the d axis, and delta is larger than or equal to 2 degrees and smaller than or equal to 8 degrees. According to the rotor structure, the utilization rate of the permanent magnets can be improved, the electromagnetic torque and the reluctance torque are improved, and the output capacity of the motor is improved.