250 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 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 relates to the technical field of permanent magnet motors, in particular to a salient pole rate reversible degree enhanced permanent magnet motor and a design method thereof. The salient pole rate reversible degree enhanced permanent magnet motor comprises a rotating shaft, a rotor sleeving the rotating shaft, and a stator coaxially sleeving the rotor; eight trapezoidal magnetic barriers with centers on a q axis and eight bread-type permanent magnets with centers on a d axis are embedded in the rotor along the circumferential direction in a staggered manner; the bread-type permanent magnets are magnetized along the inner and outer thickness directions, and the magnetizing directions are opposite; and two sides of each bread-shaped permanent magnet are respectively provided with a bulb-shaped magnetic barrier contacted with the bread-shaped permanent magnet. According to the invention, a plurality of variable magnetic resistances instead of a single magnetic resistance can be innovatively introduced into the rotor by ingeniously changing the armature current under different working conditions, so that the leakage magnetic flux and the effective magnetic flux of the motor are changed, meanwhile, the target of enhancing the reversible degree of the salient pole rate under all working conditions is achieved, and the diversified performance requirements under different working conditions can be met.

The invention discloses a permanent magnet auxiliary synchronous reluctance motor magnetic barrier asymmetric rotor structure, which comprises magnetic barrier groups arranged on a rotor core along the axial direction of the rotor core, each stage of magnetic barrier group comprises three layers of radially arranged air magnetic barriers, and the air magnetic barriers are a third magnetic barrier, a second magnetic barrier and a first magnetic barrier in sequence from the center of a rotating shaft in the rotor core to a stator core; a first permanent magnet is embedded in the magnetic barrier bottom edge of the first magnetic barrier, a second permanent magnet and a sixth permanent magnet which are arranged in an axial symmetry mode are embedded in the two magnetic barrier arms of the second magnetic barrier respectively, and a third permanent magnet and a seventh permanent magnet which are arranged in an axial symmetry mode are embedded in the two magnetic barrier arms of the third magnetic barrier respectively. And a fourth permanent magnet and a fifth permanent magnet which are asymmetrically arranged are respectively embedded in the magnetic barrier bottom edges of the second magnetic barrier and the third magnetic barrier. The magnetic barrier asymmetric rotor structure has the advantages of the magnetic barrier asymmetric rotor structure, can perform offset correction on the magnetic resistance shaft, and is adaptive to optimized motors of different models.

The invention discloses a robot servo motor based on magnetic assistance characteristics, which comprises a stator core, a rotor core and magnetic steel, the stator core comprises laminated stator punching sheets and windings, the rotor core comprises multiple layers of laminated rotor punching sheets, spoke type magnetic steel grooves and multiple layers of air magnetic barriers are arranged on the rotor punching sheets, and the magnetic steel is arranged in the magnetic steel grooves; the multiple layers of air magnetic barriers comprise a plurality of arc-shaped magnetic barriers symmetrically arranged on the two sides of the magnetic steel grooves, the arc-shaped magnetic barriers comprise a first arc-shaped magnetic barrier, a second arc-shaped magnetic barrier, a third arc-shaped magnetic barrier and an interelectrode arc edge triangular large magnetic barrier, and a rotor excircle magnetic barrier is arranged at the top of each spoke type magnetic steel groove on the rotor punching sheet. The motor has the advantages that the anti-demagnetization performance and the torque output stability of the motor can be improved while the heat dissipation area of the motor is not changed and the cost of the motor is not additionally increased.

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.

An axial active magnetic bearing includes a rotating shaft, a magnetic yoke, a permanent magnet, a magnetic barrier structure and an electromagnetic coil. The rotating shaft includes a main shaft and a thrust plate; first and second air gaps with a projected area size having an error smaller than 5% are formed between the magnetic yoke and the thrust plate; the permanent magnet is provided on the magnetic yoke, and a third air gap is formed between the thrust plate and the permanent magnet; a permanent magnet magnetic flux is formed between the permanent magnet and the magnetic yoke; the magnetic barrier structure is provided on the magnetic yoke and positioned in the path of the permanent magnet magnetic flux, the permanent magnet magnetic flux is passed through the barrier structure, the first air gap and the third air gap; the electromagnetic coil is provided in a magnetic yoke chamber.

The invention relates to the technical field of high-torque permanent magnet motors of electric automobiles, in particular to a high-torque permanent magnet motor with the optimal quadrature-direct axis inductance difference value in a full-speed domain and a design method of the high-torque permanent magnet motor. Eight double-layer rectangular permanent magnets with the centers on the d axis are embedded in the rotor in the circumferential direction, each double-layer rectangular permanent magnet is magnetized in the inner and outer thickness direction, and the magnetizing directions of every two adjacent double-layer rectangular permanent magnets are opposite. Eight small trapezoid magnetic barriers with the centers on the q axis are embedded in the rotor in the circumferential direction, and the two sides, in the tangential direction, of each small trapezoid magnetic barrier are each provided with a small rectangular permanent magnet which is not in contact with the small trapezoid magnetic barrier. According to the method, the relation among the quadrature-direct axis inductance / quadrature-direct axis inductance difference value, the motor torque / rotating speed range and the key size in the hybrid inductance unit is deduced, and the key parameters of the motor are accurately and rapidly determined on the basis of the full-speed domain quadrature-direct axis inductance difference value optimal principle.

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 relates to the technical field of motors, in particular to a synchronous reluctance motor rotor and a synchronous reluctance motor, the synchronous reluctance motor rotor comprises a rotor core, a plurality of magnetic barrier layer groups are arranged on the rotor core, the plurality of magnetic barrier layer groups are uniformly distributed along the circumferential direction of the rotor core, and each magnetic barrier layer group comprises a plurality of magnetic barrier layers arranged at intervals along the Q-axis direction; the magnetic barrier layers are asymmetrically arranged on the rotor core relative to the Q axis and are divided into strong magnetic resistance sides and weak magnetic resistance sides, and the strong magnetic resistance sides and the weak magnetic resistance sides in the plurality of groups of magnetic barrier layers are alternately distributed along the extension path of the magnetic barrier layers so as to form a magnetic flux path of an S structure. According to the invention, the characteristic that the magnetic flux is always closed along the path with the minimum magnetic resistance in the synchronous reluctance motor is utilized, and the strong magnetic resistance sides and the weak magnetic resistance sides in the plurality of groups of magnetic barrier layers are alternately distributed to form the magnetic flux path of the S structure, so that the magnetic flux is more concentrated and uniform, and the S-shaped structure can reduce the torque pulsation caused by the non-uniform magnetic field.

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 discloses an asymmetric rotor structure and a permanent magnet motor thereof. The asymmetric rotor structure comprises a first iron core, a second iron core, a rotating shaft and magnetic steel. The first iron core comprises a plurality of preset areas, each preset area is provided with a first installation groove, a first magnetic barrier and a second magnetic barrier, and the first magnetic barrier and the second magnetic barrier communicate with the two ends of the first installation groove correspondingly. The second iron cores and the first iron cores are of a mirror symmetry structure, and the number of the second iron cores is consistent with that of the first iron cores. The magnetic steel is installed in one first installation groove of each first iron core, and the magnetic steel penetrates through all the second iron cores and is fixed to the second iron cores. The first iron cores located on the two sides of the symmetry plane are symmetrically arranged about the symmetry plane, and the second iron cores located on the two sides of the symmetry plane are symmetrically arranged about the symmetry plane. The permanent magnet motor comprises the asymmetric rotor structure. Through the arrangement, the torque pulsation, the vibration noise and the axial unbalanced force generated by the permanent magnet motor can be reduced, and the operation reliability of the permanent magnet motor is improved.

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 relates to the technical field of permanent magnet synchronous motors, and discloses a built-in asymmetric rotor structure and a permanent magnet motor, and the structure comprises a rotor core which is provided with a plurality of magnetic poles in the circumferential direction; the magnetic barrier assembly comprises a plurality of magnetic barrier structures, the plurality of magnetic barrier structures are respectively arranged on the plurality of magnetic poles, each magnetic barrier structure comprises a first magnetic barrier piece and a second magnetic barrier piece, the first magnetic barrier piece and the second magnetic barrier piece are connected through a magnetic bridge, and the first magnetic barrier piece and the second magnetic barrier piece are asymmetrically arranged; and the permanent magnet assembly comprises a plurality of first permanent magnets and a plurality of second permanent magnets, the first permanent magnets are arranged in the first magnetic barrier pieces, the second permanent magnets are arranged in the second magnetic barrier pieces, and the first permanent magnets and the second permanent magnets are made of different materials. By optimizing the combination of the rotor structure and the magnetic material, larger torque output and higher efficiency are achieved, torque pulsation is remarkably reduced, and the manufacturing cost is not remarkably increased in the process.

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 relates to an asymmetric magnetic pole rotor and a motor. Arc-shaped magnetic barriers are asymmetric about the geometric center line of an N-pole magnetic pole, and arc-shaped permanent magnets are asymmetric about the geometric center line of the N-pole magnetic pole; the N pole and the S pole of the asymmetric magnetic pole rotor topology are asymmetric about the geometric center line of the two magnetic poles; the arc-shaped magnetic barrier is divided into three layers; and the S pole topology is asymmetric, namely, the N pole is obtained by rotating 45 degrees. A reinforcing rib is designed at the geometric center of a magnetic pole of the rotor topology; according to the asymmetric magnetic pole rotor design, the magnetic field can be shifted, under the condition that the permanent magnet torque is basically unchanged, the asymmetric magnetic pole rotor topology increases the reluctance torque through the magnetic field shifting effect, and then the output torque is increased; the magnetic field distribution is optimized, and the sine degree of the air gap flux density waveform is improved, so that compared with the original scheme, the optimized scheme has the advantages that the peak torque is obviously improved, and the torque ripple and the radial electromagnetic force are obviously reduced.

The present application provides a synchronous reluctance motor. The synchronous reluctance motor comprises a stator core (1) and a rotor core (2), wherein the stator core (1) comprises stator teeth (3), and the rotor core (2) comprises a plurality of magnetic barrier groups arranged along the circumferential direction, each magnetic barrier group comprises a plurality of magnetic flux barriers (4) arranged at intervals along the radial direction, and a magnetic conductive channel (5) is formed between adjacent magnetic flux barriers (4) under the same pole, wherein the number of stator teeth N is s 、Number of flux barriers under each pole B s and the number of rotor poles 2p have the following relationship: N s / 2p=B s +1. The synchronous reluctance motor according to the present application can effectively reduce torque pulsation and improve motor performance.

The invention discloses an armature-enhanced modular stator vernier permanent magnet motor, which belongs to the field of motors, applies a stator magnetic barrier to a vernier permanent magnet motor as a modulation unit of an armature winding, breaks the original understanding of the magnetic barrier through physical concepts, and can enhance the interlinking capability of the armature winding to an excitation magnetic field. Meanwhile, the magnetomotive force of a plurality of working armatures of the vernier permanent magnet motor is enhanced, so that the torque density of the motor is increased; moreover, the first stator teeth adopt a split tooth structure, so that the length of the end part of the winding is shortened, and the size of the motor is reduced; in addition, the magnetic barrier shape in which the width of the air gap side is larger than that of the non-air-gap side is adopted, so that the area of the first stator slot can be increased and more windings can be placed under the condition that the air gap structure is not influenced, and the torque density of the motor is further improved.

A sensorless built-in permanent magnet synchronous motor comprises a rotor, the rotor comprises a rotor iron core and a plurality of permanent magnets embedded in the rotor iron core, and the magnetic poles of every two adjacent permanent magnets in the same end face of the rotor are different; the rotor core is provided with a plurality of magnetic barriers and magnetic isolation bridges, the magnetic barriers and the magnetic isolation bridges are respectively close to the outer side of the rotor, each permanent magnet is provided with a magnetic barrier corresponding to one side close to the outer side of the rotor, one pair of two adjacent permanent magnets is not provided with a magnetic barrier, and the two magnetic barriers respectively close to the two adjacent permanent magnets form a magnetic barrier group. The widths and the thicknesses of the magnetic barrier groups are respectively the same, and the widths of the magnetic barrier groups are different; a magnetic isolation bridge is arranged between each permanent magnet and the outer side of the rotor, the two magnetic isolation bridges close to the two adjacent permanent magnets respectively serve as a set of magnetic isolation bridges, the lengths and the thicknesses of the magnetic isolation bridge sets are the same, and the thicknesses of the magnetic isolation bridge sets are different. The invention has the advantages of low cost and small space volume. The invention also provides a rotor mechanical angle detection method.

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 invention discloses a segmented hybrid symmetric laminated rotor, a preparation method and a motor, the rotor comprises a sub-shaft and a rotor core, the rotor core comprises a plurality of laminated assemblies symmetrically arranged relative to the middle of the rotor core, each laminated assembly is composed of a plurality of laminated individuals arranged in a stacked manner, and the laminated individuals are arranged in the sub-shaft. A plurality of groups of magnetic steel grooves are circumferentially formed in the surfaces of the lamination individuals, the shapes and sizes of the groove tops at the two ends of the magnetic steel grooves located on different lamination assemblies are different, and different magnetic barrier structures are formed between the different magnetic steel grooves and the lamination individuals. The magnetic steel grooves with different shapes are arranged on the lamination assembly, so that the lamination assembly has different magnetic barrier structures, the lamination assembly can form the rotor core of the motor rotor in various combination modes according to use requirements, and when the rotor rotates, torque harmonics with different phases generated by the lamination assembly with different magnetic barrier structures are mutually counteracted, so that the rotor core is more stable and reliable. The torque ripple of the synchronous reluctance motor can be effectively reduced.

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.