18 results about "Electromagnetic design" patented technology

The invention relates to the technical field of safe operation of power systems and motors, and particularly discloses a method for calculating a safe operation boundary of a high-inertia energy storage type phase modifier under a fault, and the method comprises the steps: building an electromagnetic field calculation model of a two-dimensional linear part and a three-dimensional end part region according to an electromagnetic design scheme of the high-inertia energy storage type phase modifier; establishing a frequency and voltage support excitation control system of the high-inertia energy storage type phase modifier, carrying out bidirectional dynamic coupling on the excitation control system and the electromagnetic field calculation model, and obtaining the frequency and voltage of a power grid through a phase-locked loop; determining the loss value of each structural member in the fault process through an electromagnetic field calculation model; according to the ventilation system structure of the high-inertia energy storage type phase modifier, a fluid and thermal coupling calculation model is established, and the loss value of each structural member is used as a heat source to be introduced into the fluid and thermal coupling calculation model; and determining the safe operation limit time of the high-inertia energy storage type phase modifier under the system frequency or voltage fault according to the maximum temperature rise allowed by each structural member.

The invention discloses a reflection offset compensation method for an outer surface coating of a high-transmission A interlayer structure radome, and belongs to the field of radomes. The invention provides a reflection cancellation compensation method for an outer surface coating of a high-transmission A interlayer structure radome, and aims to solve the problem of poor wave permeability of electromagnetic design of an existing A interlayer radome. The reflection cancellation compensation method comprises the following steps: determining respective thickness values of the coating and an outer skin; defining the initial thickness value of the inner skin, and obtaining the initial thickness value of the core layer according to the initial thickness value; performing univariate optimization on the initial thickness value of the inner skin; performing univariate optimization on the initial thickness value of the core layer to obtain a first optimal solution of the core layer; and performing simulation verification on parameter combinations of the coating thickness value, the outer skin thickness value, the first optimal solution of the inner skin and the first optimal solution of the core layer. According to the method, the thickness of the inner skin serves as an independent compensation variable to be optimized in advance, the initial characteristics of bottom reflected waves are effectively remodeled, then collaborative optimization is carried out on the thickness of the core layer, finally, the wave transmission performance far exceeding that of a traditional method is achieved, the process is simple, and the computing power cost is low.

This application discloses a method and apparatus for obtaining coil electromagnetic parameters. The method includes: obtaining second-level parameters of a superconducting maglev train; the second-level parameters include the levitation force and guiding force characteristics generated by the vehicle and the figure-eight coil, the drag characteristics generated by the vehicle and the figure-eight coil, and the traction force characteristics of the vehicle; determining third-level parameters of the superconducting maglev train based on the second-level parameters; the third-level parameters include the centerline dimensions of the superconducting magnetic poles, the distance between the centerline and the figure-eight coil, the distance between the centerline and the stator coil of the linear motor, the magnetomotive force of the superconducting magnetic poles, the pole pitch of the superconducting magnetic poles, the coil operating temperature, and the overcurrent and over-limit safety margin of the superconducting coil; and determining the coil electromagnetic parameters of the superconducting magnet based on the third-level parameters; the coil electromagnetic parameters include the coil operating current and the coil dimensions of the superconducting magnet. This application provides a modular design method for coil electromagnetic design, which facilitates continuous iteration and optimization between different parameter indicators.

The invention discloses a one-branch odd-layer stator of a flat wire motor and a stator winding manufacturing method.The one-branch odd-layer stator of the flat wire motor comprises a stator iron core and a stator winding, the stator iron core comprises a stator inner circle and a stator outer circle, Q axially-through stator grooves are evenly formed in the inner circumference of the stator iron core in the circumferential direction, the stator slots are internally provided with slot insulation paper and flat wire windings, each stator slot is internally provided with an odd number of flat wire layers with the layer number of 2n-1, n is an integer greater than or equal to 1, the slot number of each pole and each phase of the stator is q = Q / (2p * m) = 2, Q is the slot number of the stator, p is the pole pair number of the motor, and m is the phase number of the motor; compared with the prior art, through the integral slots with the slot number q of each pole and each phase being 2 and the flat wire layer number 2n-1 being odd layers (n is an integer greater than or equal to 1), the limitation of even layers is broken, the number of turns of the winding is continuously adjustable, and the electromagnetic design freedom degree and the whole machine performance consistency are remarkably improved.

The utility model relates to a motor technology field for washing machine especially a kind of high-speed permanent-magnet motor for washing machine, including stator core, rotor core;The stator core has 12 stator slots, define outer diameter as OD, inner diameter as ID, its split ratio K1=ID / OD, and 0.6≤K1≤0.7;And / or the stator core has 12 first teeth, define first tooth width as W1, its first tooth diameter ratio K2=S*W1 / (π*ID), and 0.36≤K2≤0.46, wherein S is the stator slot quantity.The utility model gives the change relation of motor slot pole ratio, split ratio, tooth diameter ratio, yoke width, magnetic steel slot width, rib width and relevant performance from the angle of electromagnetic design, simultaneously also gives the stator tooth outer edge multi-segment line and rotor tooth outer edge multi-segment line structure design thought, to reach in promoting motor low-speed output torque, high-speed output power while, promote motor efficiency when low speed and high speed respectively, and the purpose of promoting motor anti demagnetization ability.

The invention relates to a flat wire stator assembly containing odd-number-layer windings and a wiring method thereof, the stator assembly comprises a stator core and stator windings, the stator core is provided with a plurality of winding grooves, the stator windings are inserted in the winding grooves, the number of conductor layers in each winding groove is 2n + 1, n is a positive integer, and n is a positive integer. The conductor on the innermost side in each winding groove is the (2n + 1) th layer of conductor, each phase winding comprises at least two branches, and the two branches are connected in series or in parallel. According to the odd-number-layer flat wire stator winding, the electromagnetic design is more flexible, the power and torque requirements of customers can be better met, accurate matching is achieved, allowance is reduced, and the cost is reduced; according to the scheme, the innermost layers of the crown end and the torsion head end of the flat wire stator with odd layers do not intrude into the inner diameter, and shafts can be inserted in the two directions; the crown end is regular in line type, and automatic wire insertion can be realized; and the in-phase slots are uniformly distributed, and the out-phase windings are completely the same, so that the circulating current risk is low.

The invention relates to the field of electromagnetic design and optimization of transformers, in particular to a multi-winding phase-shifting transformer design method based on multi-objective optimization, which comprises the following steps: establishing a model required by multi-objective optimization, constructing a multi-objective optimization model, and setting constraint conditions; an improved NSGA-II algorithm is adopted to solve the multi-objective optimization model; and a Pareto optimal solution set is extracted, and a compromise solution is screened and selected by adopting a TOPSIS method. According to the method, a transformer electromagnetic design theory, a thermal analysis model and an economic cost model are uniformly incorporated into a multi-objective optimization framework, and overall optimization is carried out on design variables such as iron core geometric parameters, winding turn number configuration and wire cross sections; the phase-shifting transformer obtains a Pareto optimal compromise solution set among a plurality of mutually restricted targets such as total loss, material cost, transformation ratio precision, temperature rise margin and the like, and intelligent numerical design of the transformer is realized.

This invention provides an energy-saving motor, a lithium mica ball mill, and a lithium extraction process from lithium mica, relating to the field of energy-saving grinding technology. The invention includes a grinding motor; the output shaft of the grinding motor is keyway connected to a drive gear, and a driven gear is meshed with one side of the drive gear; the grinding motor is electrically equipped with a load sensing module, which includes a current sensor, a torque sensor, and a power sensor; the load sensing module is electrically connected to a controller via wires, and the controller is electrically connected to an actuator via wires. This solution optimizes electromagnetic design and reduces mechanical losses. Grinding load often fluctuates with material hardness and feed rate. The energy-saving motor, combined with an optimized start-up and speed regulation design, exhibits more significant energy-saving effects under light loads. The energy-saving design meets "dual carbon" compliance requirements, reducing corporate carbon emissions, complying with industrial energy-saving renovation policies, and lowering the environmental compliance costs of the grinding production line.

The invention, which relates to the technical field of the permanent-magnet synchronous motor, discloses a rotor weight-reduced permanent-magnet synchronous motor structure comprising a permanent-magnet synchronous motor rotor which is formed by assembling magnetic steel, a rotor punching sheet, a rotor iron core, a shaft body and a shaft key. The weight of the magnetic steel is reduced by adopting a surface-mounted structure during electromagnetic design, the total weight of the rotor punching sheet is further reduced by adopting a radial plate structure, the radial plate structure mainly plays roles in supporting a rotor iron core and transmitting torque in the rotor, the connection strength is ensured by adopting a titanium alloy material, and the connection strength is improved under the condition that the strength is ensured. The middle part of the radial plate structure is processed to realize further weight reduction, and the structural strength of the radial plate structure is verified through software simulation. According to the invention, the overall structural strength of the rotor is increased under the condition that the weight of the rotor is effectively reduced, so that the reliability of the permanent magnet synchronous motor during operation is ensured.

The invention relates to the technical field of permanent magnet motors, and discloses a solving method for the electromagnetic design of a surface-mounted permanent magnet motor with a tooth socket and a computer readable storage medium, and the method comprises the following steps: constructing an equivalent linear motor model through embedding an equivalent current sheet; dividing sub-domains, and establishing a magnetic field equation of each sub-domain including an undetermined coefficient; constructing a coupling equation set according to a physical condition at an interface of adjacent sub-domains, and integrating the coupling equation set into a unified multi-dimensional matrix equation about an undetermined coefficient; iterative solution is carried out based on a sub-domain method and a magnetic circuit method; according to the method, an actual nonlinear stator is converted into a linear stator model, a subdomain method is adopted to carry out refined area modeling and boundary coupling, local magnetic flux distortion and disturbance such as tooth tip saturation and notch magnetic leakage are captured, a closed-loop iteration process is constructed, and the performance parameters of the permanent magnet motor are calculated. Magnetic field changes caused by saturation are dynamically corrected, and it is ensured that key dynamic performance is highly matched with physical reality.

The invention relates to an energy efficiency-time collaborative optimization design method for a servo permanent magnet synchronous motor, and belongs to the technical field of servo motor system design and control. The method comprises the following steps: setting a target working condition, and setting periodic energy consumption and a shortest time target according to long-time scanning and short-time fast response working conditions; ontology optimization: based on a target trajectory and an energy consumption model, establishing a finite element optimization sample by adopting optimal Latin hypercube sampling, and solving a local optimal design scheme through a numerical agent model and an evolutionary algorithm; trajectory optimization: constructing a cost function based on a local optimal design scheme, taking a 9-degree polynomial as a trajectory function, and solving an energy optimal trajectory under constraint by adopting sequence least square programming; and setting a termination criterion, and carrying out collaborative iteration by taking the energy optimal trajectory as a new target trajectory until the energy consumption reduction percentage is lower than a set value. According to the method, the global optimal combination scheme of the SPMSM electromagnetic design and the energy optimal trajectory is obtained under the condition of considering the positioning time through the collaborative iteration of the body and the trajectory.

The invention provides an energy-saving motor, lepidolite ball-milling equipment and a process for extracting lithium from lepidolite, and relates to the technical field of energy-saving grinding. A key groove of an output shaft of the grinding motor is connected with a driving gear, and one side of the driving gear is connected with a driven gear in an engaged mode. And a load sensing module is electrically installed on the grinding motor, a current sensor, a torque sensor and a power sensor are arranged in the load sensing module, the load sensing module is electrically connected with a controller through a wire, and the controller is electrically connected with an executing mechanism through a wire. According to the scheme, electromagnetic design is optimized, mechanical loss is reduced, grinding load often fluctuates along with material hardness and feeding amount, energy-saving motor matching optimization starting is combined with speed regulation design, the energy-saving effect is more prominent during light load, the energy-saving design can meet the double-carbon compliance requirement, enterprise carbon emission can be reduced, the industrial energy-saving modification policy is met, and the energy-saving effect is better. And the environment-friendly compliance cost of the grinding production line is reduced.

The invention provides an electromagnetic design analysis method and system for a pulse coaxial coil system of an FRC device, a computer readable storage medium and electronic equipment. The electromagnetic design analysis method comprises the steps that target physical requirement parameters of the coaxial coil system are acquired; establishing a parameter calculation model, wherein the model comprises a simplified analysis formula group used for describing a mapping relation between the target physical demand parameter and the power supply key electrical parameter; based on the parameter calculation model, parameter space scanning is carried out with the number N of the coils as a variable, and a parameter space scanning graph at least containing the maximum current Imax, the maximum voltage Umax and the maximum current change rate di / dtmax changing along with the number N of the coils is generated; obtaining a key performance parameter threshold value of the solid-state switching device, and performing comparative analysis on the parameter space scanning graph and the key performance parameter threshold value; and determining the number N of coils meeting the performance parameter constraint of the solid-state switching device according to the comparison and analysis result. According to the method, the calculation amount is greatly simplified, so that the efficiency of forward design and engineering analysis of the system is improved.

The application belongs to the field of microwave technology and electromagnetic optimization design, and particularly discloses an electromagnetic device optimization design method based on a particle swarm optimization algorithm assisted by multi-view semi-supervised learning. The method disclosed by the application comprises the following steps: defining design variables and optimization objectives, and generating initial samples; updating particle positions by using an improved social learning particle swarm algorithm, selecting a prediction model to perform real simulation on potential particles, and storing the remaining particles in an unlabeled sample pool; screening high-confidence samples by using a multi-view model, generating pseudo-labels by using convex combination optimization, and expanding a training set; constructing a semi-supervised learning model, calculating a prediction error, and setting a tolerance interval; selecting a prediction model according to a three-mode decision rule, iteratively updating the model and the particle swarm, and stopping until the design objectives are met. The application can efficiently optimize the performance of electromagnetic devices with a small number of simulation times. The application is suitable for electromagnetic design problems with high-cost simulation evaluation.

According to the permanent magnet synchronous motor and the robot joint, a three-phase asymmetric double-layer winding structure is combined, and the amplitude of cogging torque is remarkably reduced by optimizing the electromagnetic design of the motor. According to the scheme, the defects of a traditional skewed slot or skewed pole technology in production process and cost control are overcome, and the robot joint motor structure can be matched, so that the purposes of light weight, high integration level and low torque ripple of the robot joint motor are further achieved. By adopting the technical scheme of the invention, the permanent magnet synchronous motor can effectively weaken the cogging torque on the basis of keeping the original performance. The manufacturing difficulty and the cost input in the production process are reduced, more stable and reliable power output is provided for a robot joint driving system, and therefore the technical requirements for the multiple aspects of high precision, low noise and the like are met.

The invention relates to the technical field of wireless electric energy transmission and electromagnetic design, and provides a wireless energy supply device which is installed in an insulator and comprises a transmitting coil and a receiving coil. The transmitting coil is used for transmitting a high-frequency electromagnetic field. The receiving coil and the transmitting coil are coaxially arranged, and the receiving coil is used for receiving the high-frequency electromagnetic field and converting the high-frequency electromagnetic field into electric energy. Moreover, the transmitting coil and the receiving coil are both planar spiral coils with gradually-changed turn intervals, and the planar spiral coils are sequentially provided with dense winding areas, transition areas and sparse winding areas from the centers to the peripheries of the planar spiral coils. The turn spacing of the dense winding area is smaller than the turn spacing of the transition area, and the turn spacing of the transition area is smaller than the turn spacing of the sparse winding area. According to the embodiment of the invention, the problems of non-uniform magnetic field distribution, low coupling efficiency and low energy transmission efficiency of the coupling coil for supplying energy to the power transmission line monitoring equipment in the prior art can be solved.

The invention discloses a double-winding double-speed motor wiring method and a positive-pressure shell type three-phase asynchronous motor, and relates to the technical field of motor design and electrical control. In order to solve the problems that in the prior art, when a double-winding double-speed motor operates at different pole numbers, the efficiency of the motor is reduced, the temperature rise is increased, and the operation performance is unstable, two sets of independent three-phase symmetrical windings are arranged in a motor stator and correspond to the operation states of different pole pair numbers respectively; determining a winding pole pitch and a slot pitch angle according to the relationship between the number of stator slots and the number of pole pairs, and arranging the two sets of windings in the stator slots in a mutually staggered and embedded manner; in the electromagnetic design stage, the induced potentials of the non-working windings are mutually counteracted; in the parallel winding design, the number of branches and the connection sequence are optimized to eliminate parallel circulating current; and independent access and safe switching of different windings are realized through the wiring terminal box and the control system. The method is suitable for design and manufacturing of the positive-pressure shell type double-winding double-speed asynchronous motor.