115 results about "Torque density" patented technology

The invention belongs to the technical field of motors, and discloses a rotor claw pole shaft radial hybrid excitation torque motor which comprises a radial magnetic field armature stator and a shaft radial magnetic field rotor. And a radial air gap is formed between the radial magnetic field armature stator and the radial magnetic field rotor. Wherein the axial-radial magnetic field rotor comprises two claw pole type rotor iron cores, a plurality of radial magnetic flux permanent magnets and axial magnetic flux permanent magnets. The two claw-pole type rotor iron cores are arranged in opposite directions, so that the claw-pole type rotor tooth parts are staggered with each other. The radial magnetic flux permanent magnets are sequentially inserted between the claw pole type rotor tooth parts, the magnetizing directions of the radial magnetic flux permanent magnets repel each other, and the axial magnetic flux permanent magnets are arranged between the two claw pole type rotor yoke parts. Through the action of the tangential permanent magnets and the axial permanent magnets on the claw pole rotor, cross coupling of magnetic circuits is realized, the air gap flux density is enhanced, the torque density and efficiency are improved, and the integration level and the space utilization rate of the motor are improved.

This invention provides an axial-radial composite flux permanent magnet motor, relating to the field of motor technology. It includes a rotor assembly and a stator assembly. The rotor assembly includes multiple permanent magnets uniformly arranged circumferentially. Each permanent magnet includes an integrally formed axial pole segment, a first transition segment, and a radial pole segment. The stator assembly includes a stator core and stator windings. The stator core includes stator teeth uniformly arranged circumferentially. Each stator tooth includes an integrally formed axial tooth body segment, a second transition segment, and a radial tooth body segment, corresponding to the axial pole segment, the first transition segment, and the radial pole segment, respectively. The stator windings are wound on the corresponding axial tooth body segments. This invention not only reduces magnetic energy loss and improves magnetic field coupling efficiency but also increases the effective coupling area between the permanent magnets and the stator teeth, improving the motor's torque density and power density. Furthermore, it ensures stable operation and has a wide range of applications.

The invention provides a control method and system for a high-torque-density robot joint module and relates to the technical field of robot joint module control, and the method comprises the steps that three-dimensional image information of waste to be compressed is obtained; determining a compression resistance degree three-dimensional distribution diagram of the to-be-compressed waste based on the three-dimensional image information of the to-be-compressed waste; based on the multiple sets of test fixing schemes, a high-torque-density robot joint module is controlled to fix and shake waste materials to be compressed; determining an initial fixing scheme and a preliminary compression depth based on the shaking video of the to-be-compressed waste fixed by each test fixing scheme; and based on the adjusting and fixing scheme, a high-torque-density robot joint module is controlled to fix the to-be-compressed waste, and a compressor is controlled to conduct compression. According to the method, the optimal fixing and compression cooperative control scheme of the to-be-compressed waste can be efficiently and accurately determined.

The application provides a folding wing rope drive ball reverse helix folding and unfolding device, which comprises a folding and unfolding mechanism, a rope drive mechanism and a pulley steering mechanism; the rope drive mechanism supports the folding and unfolding mechanism and the pulley steering mechanism, the rope drive mechanism keeps the steel wire rope in a tension state by adjusting the distance, the pulley steering mechanism is used for changing the direction of the steel wire rope, the rope drive mechanism outputs rotary motion, the direction of the steel wire rope is changed, reciprocating tension action is realized, the folding and unfolding mechanism is pulled to drive the folding wing and the fixed wing to rotate around the axis. The rope drive mechanism and the pulley steering mechanism are used to realize the loosening and tension action of the connecting end of the steel wire rope, the sliding and rolling contact of the ball in the linear groove, the helical groove and the linear / helical composite groove structure is used to realize the rotary motion of the folding wing under a large lead, and the large-scale high-efficiency driving, the large-angle high-torque density folding and unfolding effect under the compact height wing space are achieved.

An actuator comprises a sun wheel roller (104), a planet wheel roller (102), an auxiliary roller (103) and a fixed gear ring (101), the sun wheel roller (104) is located in the center, and the fixed gear ring (101) is located outside all elements. The auxiliary roller (103) is positioned between the planet wheel roller (102) and the fixed gear ring (101), and the planet wheel roller (102) is in contact with the sun wheel roller (104), the auxiliary roller (103) and the fixed gear ring (101), characterized in that the sun wheel roller (104), the planet wheel roller (102), the auxiliary roller (103) and the fixed gear ring (101) all have a truncated cone geometry or a truncated cone geometry. According to the invention, a transmission device is realized, which provides a simple method for changing the pre-tightening force on the rolling contact element, thereby providing an effective means for improving the torque density and the mechanical efficiency of the transmission device.

The application discloses a claw pole stepping motor with an integrated stator core, and belongs to the field of permanent magnet stepping motor design. The application is used for solving the problem that the equivalent air gap of the main magnetic circuit is increased and the torque density is decreased due to the split stator structure of the micro claw pole stepping motor. The application comprises a stator and a rotor. The stator adopts an integrated stator core which is integrally bent and formed from a single plate material, and sequentially forms an inner claw pole, a stator tooth bottom, a stator wall, a stator tooth top and an outer claw pole from inside to outside along the radial direction. The stator tooth bottom is provided with a positioning hole for inserting and fixing a coil framework. The coil framework is provided with a wire outlet structure, so that the coil can be led out from the gap of the core. The rotor comprises a rotating shaft and a permanent magnet. The integrated stator core design eliminates the assembly joint of the split structure, effectively reduces the equivalent air gap, reduces the magnetic flux leakage, and thus significantly improves the torque density and electromagnetic load of the motor.

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 a hollow joint planetary gear motor, which realizes internal wiring by designing an integrated hollow channel penetrating through a motor rotor shaft and a final output planet carrier; meanwhile, the double magnetic encoder assemblies directly installed on the rotor shaft and the output shaft respectively are adopted, and high-precision position and speed detection without an intermediate transmission link is achieved; and in combination with an optimized two-stage planetary speed reduction structure and a special bearing support and torque transmission design, compact joint driving with high torque density and high control precision is realized on the premise of ensuring the strength and rigidity of the hollow structure. Back clearance errors, elastic deformation and abrasion caused by movement transmission through intermediate links such as a gear in the prior art are fundamentally eradicated, the control problems that precision is low and high-precision absolute position and multi-turn counting cannot be considered at the same time due to single or indirect encoder feedback are solved, high-torque-density transmission is ensured, and meanwhile the control precision is improved. And neat integrated wiring and ultrahigh-precision motion control capability are realized.

The embodiment of the utility model discloses a motor and a vehicle with the same, the motor comprises a stator assembly, the stator assembly comprises a stator core and a stator winding, the stator core comprises a yoke part and a tooth part located at one side, facing the axis of the motor, of the yoke part, the yoke part and the tooth part define a winding groove, and the stator winding is arranged in the winding groove; wherein the stator winding comprises a winding wire wound in a winding groove, and the cross section contour of the winding wire is square. According to the motor provided by the embodiment of the invention, by adopting the square winding, the slot fullness rate can be improved, the torque density and the power density of the motor are higher, the energy efficiency of the motor is improved, the size of the motor can be reduced, the space occupation of the motor is reduced, and the arrangement difficulty of the motor is reduced.

The invention relates to a precision self-adaptive control system for a high-torque-density cycloid speed reducer joint, and belongs to the technical field of robot joint driving and control. The method comprises the steps that a robot joint is driven to reach a designated position through a communication device and a positioner, and collected joint posture data are transmitted to a main control device; through a joint encoder equipped on an angle driving framework, attitude data during equipment movement are analyzed based on the joint encoder, and precision self-adaptive adjustment in the joint angle direction is carried out according to the input attitude data; calculating the actual deviation between the cycloid speed reducer and the target joint through a backlash deviation model; based on the actual deviation, a motor is controlled to drive the framework to move in combination with the corresponding initial compensation parameters; and real-time precision evaluation is carried out on the collected joint postures through a precision evaluation framework, and the optimal compensation position and related posture data are recorded after the evaluation is passed. Under the same output capacity, the small size, the small weight and the large output torque are achieved.

The invention discloses a cycloid type permanent magnet gear composite motor, which comprises a fixed pin shaft assembly, a stator and a rotor, and is characterized in that the stator comprises a stator iron core and a stator winding with ps antipode pairs, and the stator winding is located at the inner side of the stator iron core; and the fixed pin shaft assembly comprises a fixed disc and a fixed pin shaft. The cycloid type permanent magnet and the permanent magnet motor are combined into a whole, so that driving and speed changing are integrated, a mechanical gear transmission device is omitted, space is saved, low-speed large-torque transmission can be directly achieved, the structure is more compact, loss of an intermediate speed changing device is reduced, fundamental wave speed changing transmission is utilized, and generated magnetic field loss is small; the cycloid type permanent magnet motor has the advantages that torque is further improved, the cycloid type permanent magnet motor is more suitable for low-speed large-torque transmission, the torque density of the motor is higher, the cycloid type permanent magnet motor also inherits the advantage of large transmission ratio of the cycloid type permanent magnet, and electric energy consumption can be reduced by controlling the stator winding to be powered on at the position with the air gap smaller than 2 mm instead of being powered on completely.

The invention provides an axial magnetic flux hub motor with an embedded planetary reducer, and belongs to the technical field of hub motors. The hub motor comprises an axial magnetic flux motor and a planetary reducer integrated at the driving end of the axial magnetic flux motor. The axial magnetic flux motor adopts a structure that a rotor is clamped by double stators, a rotor output shaft of the axial magnetic flux motor is directly connected with a sun gear of the planetary reducer, and a planet carrier flange of the planetary reducer serves as a complete machine output end. The planetary reducer is highly integrated in the internal space of the axial magnetic flux motor, and a shell integrated connection structure is adopted, so that the axial size of the whole machine is shortened; meanwhile, the torque increasing effect of the planetary reducer is utilized, high-torque output is achieved in a compact space, and the contradiction between the limited hub installation space and the driving torque requirement is solved. In addition, the driving end shell and the non-driving end shell are both integrated with cooling water channels, and good heat dissipation performance is ensured. The hub assembly is compact in structure, high in torque density and capable of being directly matched with the hub space of an existing vehicle.

The invention discloses a method for optimal design of a transmission chain of a wind power gear box and a related product. A gearbox transmission chain comprises at least one planetary transmission stage, and the method comprises the steps that an optimization model is established according to the wind power gear transmission chain design problem, and the objective function of the optimization model comprises the maximum transmission chain torque density; the decision variables of the optimization model comprise the number of planetary gears in each planetary transmission stage, and the transmission ratio, modulus, helical angle, tooth width and total displacement coefficient of each planetary transmission stage; and solving the optimization problem by using an optimization algorithm to obtain an optimal decision variable value. According to the method, the mathematical model is established with the purpose of maximizing the torque density of the transmission chain, the optimization algorithm is used for solving, the optimal decision variable value is obtained, and then the design of the high-torque-density wind power gear transmission scheme is rapidly completed.

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.

The invention provides a compact high-torque two-stage speed reducer for a vehicle active stabilizer bar. The compact high-torque two-stage speed reducer comprises a shell, a first-stage planetary gear train, a second-stage planetary gear train, a sealing assembly and an output flange. The first-stage planetary gear train and the second-stage planetary gear train are installed in the shell, and a first-stage sun gear of the first-stage planetary gear train serves as an output end. The output flange is connected with a second-stage planet carrier of the second-stage planetary gear train, and the output flange serves as an output end; a first-stage planet carrier of the first-stage planetary gear train is fixedly connected with a second-stage sun gear of a second-stage planet carrier, so that the first-stage sun gear rotates to drive the output flange to rotate; the first-stage planetary gear train and the second-stage planetary gear train are sealed in the shell through the sealing assembly. The problems that an existing active stabilizer bar driving system is low in torque density, long in axial size, insufficient in torsional rigidity and the like can be solved.

This invention relates to the field of motor technology, and particularly to a motor drive assembly and a robot hand using the same. The motor drive assembly includes a rotating shaft, a transmission device, a housing, and a drive unit housed within the housing. Specifically, the drive unit may be an axial flux motor. The transmission device includes a transmission bracket, an eccentric wheel, a first bearing, a second bearing, and a reduction gear assembly. Along the axial direction of the rotating shaft, the second bearing, the eccentric wheel, and the drive unit are arranged sequentially. The outer ring of the reduction gear assembly is fixedly connected to the inner wall of the housing, and the inner ring of the reduction gear assembly is sleeved with the eccentric wheel through the first bearing. The end of the rotating shaft extends out of the housing and is provided with a transmission bracket, which is connected to the second bearing and linked to the reduction gear assembly. The transmission bracket is also connected to a linkage motor. The entire drive assembly features a compact structure, small size, and achieves high torque density and a low reduction ratio.

The invention provides a high-torque-density permanent magnet synchronous motor for an unmanned aerial vehicle, and belongs to the technical field of high-torque-density radial-flux stator-yoke-free double-rotor permanent magnet synchronous motors. The motor comprises an outer rotor, a stator, an inner rotor and a rotating shaft. Segmented permanent magnet groove units are evenly distributed in an inner rotor yoke in the inner rotor in the circumferential direction, the segmented permanent magnet groove units are of radial symmetrical structures, and a rotor N pole and a rotor S pole are arranged adjacently and embedded into the segmented permanent magnet groove units respectively. An outer rotor permanent magnet in the outer rotor is fixedly arranged on the inner side of an outer rotor yoke; the stator comprises stator iron core modules and stator coils, the stator iron core modules are evenly distributed between the outer rotor and the inner rotor in the circumferential direction, and the stator coils are wound around the stator iron core modules. According to the invention, the torque density can be effectively improved, the rotor weight is reduced, the torque ripple is reduced, and the thrust-weight ratio of an unmanned aerial vehicle power system is improved; the dislocation angle of the inner rotor and the outer rotor enables the output torque to reach the maximum.

The application relates to an integrated joint and exoskeleton robot, the integrated joint comprising a ring motor structure, a planetary gear reducer and an output adapter connecting the two, the ring motor structure being sleeved outside the planetary gear reducer. The ring motor structure comprises a rotor connector, a first rotor assembly, a second rotor assembly and a stator assembly sandwiched between the two, the first rotor assembly and the second rotor assembly being fixedly connected through the rotor connector, so that the first rotor assembly and the second rotor assembly can synchronously rotate. The first rotor assembly, the second rotor assembly and the stator assembly are all annularly arranged outside the planetary gear reducer around the axis of the ring motor structure. The integrated joint and exoskeleton robot provided by the application solve the problems that the integration degree of the driving joint motor and the reducer is low, the structure of the transmission mechanism between the motor and the reducer is complex and heavy, and the driving joint is oversized, the torque density is too low and the performance is poor.

The invention relates to an amorphous lamination for improving magnetic flux and a preparation process thereof, and belongs to the technical field of motor manufacturing. According to the method, high-purity iron, boron, silicon, carbon, cobalt, copper, niobium and rare earth metal serve as raw materials, an amorphous alloy belt is obtained through single-roller rapid quenching belt manufacturing, and an amorphous structure with the grain size being 10-20 nm is formed through primary annealing and magnetic field auxiliary annealing and cooling to the room temperature; when the prepared amorphous lamination is used for a motor, magnetic flux can be improved, eddy current can be reduced, and therefore the torque density of the motor can be improved.

The application relates to an optimal design method of a modular axial flux permanent magnet synchronous wind generator, and belongs to the field of wind power generation. The generator comprises a stator and a rotor; torque pulsation and torque density are used as optimization targets, and stator slot depth, rotor permanent magnet thickness and rotor permanent magnet pole arc coefficient are used as to-be-optimized design variables; constraint conditions of the design variables are determined, a Latin hypercube sampling experiment is carried out, a DNN proxy model of the optimization target and the to-be-optimized design variables is established; a Bayesian optimization algorithm is used to optimize hyperparameters of the proxy model, and optimal hyperparameters are obtained; the proxy model adopting the optimal hyperparameters is trained to obtain an optimal proxy model, and based on the optimal proxy model, an NSGA-II optimization algorithm is used to optimize the to-be-optimized design variables, and finally, an optimal combination of the to-be-optimized design variables is determined. The application can reduce modeling errors, improve calculation efficiency, robustly process multi-target trade-off under complex parameter coupling conditions, and effectively improve the performance of the modular generator.

The invention provides a double-disc double-axial-double-radial mixed magnetic flux permanent magnet motor. The double-disc double-axial-double-radial mixed magnetic flux permanent magnet motor comprises a double-disc stator, an H-shaped block iron core, four stator teeth, an endless annular winding, a middle rotor non-magnetic-conductive fixing frame and a straight cooling water jacket. The H-shaped block iron core is of an arc-shaped silicon steel lamination structure with the two ends communicated. The double-disc stator comprises two single-disc stators of the same structure, each single-disc stator is of a circumferential integrated combined structure of a plurality of H-shaped block iron cores, and the two single-disc stators are connected at an inner ring. The single-disc stator is provided with a plurality of four-stator teeth and a plurality of core columns, the four-stator teeth are of a biaxial-biradial mixed magnetic flux structure, the core columns are provided with endless annular windings, and the peripheries of the endless annular windings are provided with straight cold water jackets. A stator support, a direct cooling water jacket, a stator peripheral restraint and a middle rotor non-magnetic fixing frame are arranged by using a heat-conducting carbon fiber composite material. By means of the double-disc double-axial-double-radial mixed magnetic flux structure, iron loss can be reduced, and the winding utilization rate and the torque density can be improved.

This invention relates to the field of motor technology and discloses a six-phase coil and motor, comprising: a coil winding mechanism, wherein the coil winding mechanism includes silicon steel sheets, insulating bushings, toothed plates, winding slots, and six-phase winding coils. The insulating bushing is fixedly connected to the inner wall of the silicon steel sheet, the toothed plates are integrally disposed on the surface of the silicon steel sheet, the winding slots are disposed between two adjacent toothed plates, and the six-phase winding coils are wound inside the winding slots. Through the coil winding mechanism, stator support mechanism, rotor hub mechanism, lubrication pump mechanism, and lubrication seepage mechanism, torque pulsation can be reduced, torque density increased, and single-phase current pressure reduced, thereby improving the stability of the hub rotation. Simultaneously, the star-delta connection mode of the six-phase winding coils can be dynamically switched, ensuring that the motor switches between light-load start-up and high-torque, high-speed operation, thus ensuring that the output of the motor in each frequency range meets the requirements of practical applications.

This invention belongs to the field of rotor motor technology, and particularly relates to a three-rotor motor structure. It can significantly increase the magnetic load of the motor within a limited space, thereby improving the utilization rate of motor materials and space, and thus increasing power density and torque density. It includes a three-rotor motor body; the three-rotor motor body includes a stator housing, a modular stator core A, two modular stator cores B, winding coils, two axial flux rotors B, and a radial flux rotor A; the modular stator core A is located between the two modular stator cores B, and the winding coils are wound on the modular stator core A and positioned within the cavity formed by the stator cores A and B; together, they form the wound stator core; the stator housing is installed outside the wound stator core to form a stator assembly; the radial flux rotor A is located between the two axial flux rotors B, and the three together form a rotor assembly; the stator assembly and the rotor assembly are connected and positioned to form the three-rotor motor body.

This invention discloses an asymmetric hybrid surface-embedded-salient pole permanent magnet motor, belonging to the field of permanent magnet motor technology. It includes an outer stator core with an air gap in the middle and an inner hybrid surface-embedded-salient pole permanent magnet rotor. Three-phase armature windings are mounted on the stator core, and a shaft is surrounded by the rotor and located on the motor's central axis. The rotor includes rotor salient pole teeth, a rotor yoke, an inner air slot, permanent magnets, and an outer slot. The permanent magnets are placed in the outer slot, offset at an angle relative to the central axis of the outer slot. This invention combines the advantages of surface-embedded permanent magnet motors (simple structure, high permanent magnet utilization, high power density) and salient pole motors (high reluctance torque). By utilizing the asymmetric distribution of the permanent magnets, the peak values ​​of the permanent magnet torque and reluctance torque components can reach their maximum values ​​at similar current angles, improving torque component utilization and thus increasing torque density.

The invention provides a high-performance driving axial yoke-free segmented stator magnetic flux switching type permanent magnet motor, which adopts an axial double-rotor-single-stator structure, rotors are coaxially arranged on two sides of a stator in parallel, the stator is composed of a plurality of separated modular stator units, the modular stator units are connected without stator yokes, and the modular stator units are connected with the single-rotor-single-stator structure. Each modular stator unit comprises a tangential magnetized permanent magnet and two iron cores clamping the permanent magnet, and armature windings are wound on the outer sides of the iron cores. According to the invention, through the combination of the yoke-free stator unit and the dual-rotor topology, the space limitation of a traditional magnetic flux switching permanent magnet motor winding is broken through, and the torque density is improved; the fractional-slot concentrated winding is adopted, so that copper loss is effectively reduced; the improved magnetic flux modulation principle and deviation angle design realize collaborative optimization of high torque and low pulsation.

The application discloses a coaxial rotor linear variable-pitch motor servo system and a low-altitude aircraft, relates to the field of servo motor driving, and aims to solve the problem of low power density and torque density of a driving motor in the existing low-altitude aircraft servo system. The motor servo system comprises a double-rotor driving unit, which has the functions of a rotor and variable pitch at the same time, and improves the power density and torque density; a linear variable-pitch transmission unit, which adopts a reverse planetary roller screw assembly to realize efficient linear variable-pitch movement and has self-locking performance; and a closed circulation heat dissipation unit, which contacts the motor and the transmission unit through internal circulation lubricating oil to improve the heat dissipation efficiency. The application can be used for the servo system of a low-altitude aircraft.

The invention discloses a coaxial rotor linear variable pitch motor servo system and a low-altitude aircraft, relates to the field of servo motor driving, and aims to solve the problems of low power density and low torque density of a driving motor in an existing low-altitude aircraft servo system. The motor servo system of the present invention comprises: a dual-rotor driving unit which has rotor and variable pitch functions at the same time and improves power density and torque density; the linear variable-pitch transmission unit adopts a reverse planetary roller screw assembly to realize efficient linear variable-pitch movement and has self-locking performance; the closed circulation heat dissipation unit makes contact with the motor and the transmission unit through internal circulation lubricating oil, and the heat dissipation efficiency is improved. The method can be used for a servo system of a low-altitude aircraft.

The invention relates to the technical field of motors, and provides a motor and clothes processing equipment. The motor comprises a stator core and a rotor core, the stator core is provided with a through hole penetrating in the axial direction, the stator core is provided with a plurality of stator tooth parts at intervals in the circumferential direction, and a stator tooth groove is formed between every two adjacent stator tooth parts; the rotor core is arranged in the through hole, a plurality of mounting grooves are formed in the rotor core at intervals in the circumferential direction, the mounting grooves extend in the radial direction of the rotor core, the groove width of the mounting grooves close to the center part of the rotor core is larger than the groove width of the mounting grooves close to the edge part of the rotor core, and permanent magnets are arranged in the mounting grooves; and the permanent magnets are matched with the mounting grooves in shape. Compared with a traditional motor adopting equal-width mounting grooves, the motor can optimize the magnetic circuit structure, increase the rotor magnetic flux, improve the air gap flux density fundamental wave amplitude and reduce the waveform sine distortion rate, thereby improving the torque density of the motor, reducing the torque ripple and further improving the overall efficiency of the motor.

The invention discloses a load migration type strong overload double-stator vernier permanent magnet motor, and belongs to the field of permanent magnet motors. The motor comprises an inner stator, an outer stator and a rotor which are coaxially sleeved; a permanent magnet and a ferromagnetic pole array which are magnetized tangentially and radially are embedded in the rotor, so that relatively large primary magnetomotive force and relatively large tertiary magnetomotive force can be generated in an inner air gap and an outer air gap respectively; the outer stator utilizes three times of magnetomotive force, so that armature reaction can be reduced, and saturation is not easy in a high-load range; the inner stator utilizes primary magnetomotive force and adopts a directional design structure, so that the counter electromotive force of the inner stator is larger than that of the outer stator under low load, and as the load is increased, the counter electromotive force of the inner stator is smaller than that of the outer stator due to the fact that primary armature harmonic of the inner stator of the motor is high in content and easy to saturate and the counter electromotive force of the inner stator is smaller than that of the outer stator, the load is transferred to the outer stator from the inner stator. The problem of motor saturation can be relieved, torque density maximization in a wide load range is achieved, and the overload capacity of the motor is improved.

The application belongs to the technical field of motor design, and discloses a mine vernier motor topology construction method based on magnetic conductance harmonic reconstruction. First, a mathematical representation model of torque density, power factor and torque fluctuation about the characteristic parameters of magnetic conductance harmonic is established to reveal the internal correlation mechanism. On this basis, by actively introducing new-order beneficial magnetic conductance harmonics in the initial magnetic conductance harmonic set, a comprehensive optimized target magnetic conductance harmonic set is constructed, and the amplitude and phase of each key magnetic conductance harmonic in the target magnetic conductance harmonic set are reconstructed to enhance the positive contribution to the average torque, suppress the torque ripple component and optimize the armature flux distribution, so that the collaborative improvement of high torque density, high power factor and low torque fluctuation is realized in the mine low-speed direct drive scene. The application breaks through the limitations of traditional forward design, realizes the reverse construction from the electromagnetic performance target to the topology structure, is easy to achieve global optimization, shortens the design cycle and reduces the development cost.