160 results about "Copper loss" patented technology

The invention provides a biphase composite magnetic material magnetically controlled reactor electromagnetic transient simulation method, device and equipment and a medium, and relates to the technical field of power equipment magnetic material testing and electromagnetic transient simulation. According to the invention, the test winding is arranged on the excitation winding of the magnetically controlled reactor, and multi-dimensional means of obtaining total iron loss through an open circuit test, obtaining magnetic hysteresis loss through a frequency reduction test, obtaining copper loss and leakage reactance through a short circuit test and the like are combined, so that separation of magnetic hysteresis loss, eddy current loss and additional loss can be realized; a high-fidelity hysteresis loop and a magnetic conductivity change rule are obtained, and the nonlinear characteristic and hysteresis response of the magnetic core can be accurately captured, so that the predictive capability of equipment performance and the sensing capability of an operation state are improved.

The invention relates to the technical field of electromechanical hydraulic systems, and particularly discloses a low-temperature cold start control method based on high-frequency injection, which comprises the following steps: analyzing a motor state, and carrying out observation and feed-forward compensation on disturbance caused by the motor state to a load torque and a viscosity coefficient through a sliding mode observer algorithm; according to the motor state, obtaining a state equation, constructing an extended sliding mode observer equation, deriving to obtain an observer error equation, and observing the load torque; analyzing the obtained load torque, wherein the motor load torque reflects the oil viscosity; high-frequency current injection, injection frequency control, skin effect enhancement and current amplitude control are carried out in a low-temperature state according to an oil viscosity result, copper loss and a high-frequency magnetic field eddy current effect are used for assisting heat generation, and according to a final oil viscosity result, when electromagnetic heat generation viscosity is reduced and a load is reduced, an injection voltage amplitude is gradually reduced. And after a normal starting condition is reached, switching to normal id = 0 control.

The invention discloses a performance analysis method for a topological structure of a multi-topology axial flux permanent magnet motor based on electromagnetic-thermal coupling, and the method comprises the steps: firstly building three-dimensional electromagnetic finite element models of four typical axial flux permanent magnet motors, and calculating electromagnetic loss including iron core loss, copper loss and permanent magnet eddy current loss; importing the loss data into a three-dimensional fluid-thermal coupling model, and simulating the temperature rise of the motor under a natural cooling condition; the performance of the motor is subjected to double constraints of winding insulation and irreversible demagnetization temperature of a permanent magnet, so that the maximum current density of safe steady-state operation of the motor is determined and identified by adopting an iterative electromagnetic-thermal coupling analysis method, and the maximum torque density of each topological structure is evaluated under thermal constraints. The electromagnetic performance and the thermal constraint can be coupled, so that the optimal performance achieved by different axial magnetic flux permanent magnet motor topological structures can be compared, and the problem of inaccurate performance evaluation caused by neglect of the thermal constraint in the existing motor design is solved.

The invention discloses a smooth transition method and system for sensorless field directional control, and relates to the technical field of permanent magnet synchronous motor sensorless control. According to the method, an error between an I-f starting virtual synchronous reference coordinate system and a sensorless observer estimation coordinate system is eliminated through a dual-core mechanism of a robust transition strategy and a position error compensation strategy, and then rotor position deviation caused by non-ideal factors is corrected through an exclusive compensation module; the system constructs a multi-stage switching control framework based on the method, and seamless transition from I-f open-loop starting to sensorless FOC closed-loop control is achieved. Complex parameter adjustment is not needed, transition is fast and stable, torque magnetic flux control precision can be optimized, copper loss is reduced, system efficiency and robustness are improved, and the method is suitable for industrial driving scenes such as air conditioner compressors.

The invention provides an intelligent network connection reactive power energy management system, which belongs to the technical field of power system energy conservation and comprises an original low-voltage power supply system in a power grid, and I-type reactive power difference compensation equipment, II-type reactive power difference compensation equipment and III-type reactive power difference compensation equipment which are connected with the original low-voltage power supply system, the difference compensation results of the three reactive difference compensation devices are transmitted to the intelligent network connection technology platform through the remote transmission terminal; the I-type reactive compensation equipment is used for low-load compensation in a system transformer and reactive compensation of excitation and copper loss of the transformer; the II-type reactive compensation equipment is used for high-load reactive compensation in the system transformer; and the III-type reactive power difference compensation equipment is connected with the single electric equipment of which the load reactive power is greater than a specific value, and is used for reactive power in-situ difference compensation of the single electric equipment. Layered precise energy compensation is realized from the transformer to the terminal equipment, extensibility of macroscopic compensation is avoided, and compensation precision is greatly improved. Compared with the traditional problem that missing compensation is not easy to perceive, equipment abnormity and a compensation gap can be found in time, a fault point can be rapidly positioned, the pain point that maintenance is difficult to carry out in time is solved, and compensation continuity and stability are guaranteed.

Disclosed are systems and methods for motor control using optimal efficiency reference generation. An electronic controller can determine current values of a motor in a rotating reference frame. Each current value can be associated with a dimension of a set of dimensions of the rotating reference frame. The electronic controller can further determine flux linkage values for each dimension of the set of dimensions of the rotating reference frame based on the current values using an optimization cost function that accounts for motor speed, copper loss, and core loss. The electronic controller can further determine target flux linkage values for each dimension of the set of dimensions of the rotating reference frame. The electronic controller can then control a power switch network coupled between a power source and the motor based on the flux linkage values and the target flux linkage values.

The application provides a motor winding, comprising: a multi-phase winding, each phase winding comprising a plurality of branches, each branch comprising: a forward coil group comprising a plurality of U-shaped coils, the span of the U-shaped coils of the forward coil group being y, y-2 or y+1, y representing a pole pitch of the motor; a reverse coil group comprising a plurality of U-shaped coils, the span of the U-shaped coils of the reverse coil group being y, y-1 or y+2; and a same-layer jumper with a span of y-2 or y+1, the same-layer jumper connecting the forward coil group and the reverse coil group; wherein the U-shaped coils of the forward coil group are connected in a circumferential direction for one turn and then connected in a radial direction to the next turn; the reverse coil group has the same winding mode as the forward coil group and has an opposite winding direction. The application improves the slot fill rate of the stator winding stator slot, reduces the resistance of the stator winding, reduces the copper loss of the motor, and improves the efficiency of the motor.

The present application relates to the technical field of transformer evaluation, and particularly relates to a light-weight medium-high frequency transformer conversion efficiency evaluation method and system, which comprises the following steps: obtaining structure winding parameters, light-weight parameters and operation condition parameters of a transformer to be evaluated, and constructing an evaluation data set; constructing an efficiency evaluation model, which at least comprises an iron loss sub-model and a copper loss sub-model, and setting model parameters of the iron loss sub-model and the copper loss sub-model as to-be-identified parameters; obtaining test data corresponding to the transformer to be evaluated, and performing parameter calibration on the to-be-identified parameters; inputting the evaluation data set into the calibrated efficiency evaluation model, outputting loss decomposition results and efficiency results of each working condition point, and obtaining conversion efficiency evaluation results. Through the present application, the problem that the efficiency evaluation of a light-weight medium-high frequency transformer in the prior art relies on experience or single-point testing and is difficult to model and calibrate in multiple working conditions, thereby leading to large deviation, is effectively solved, and accurate evaluation of multiple working condition loss decomposition and conversion efficiency is realized.

The utility model relates to the technical field of gear motors, and discloses a gear motor protection device which comprises a gear motor body, a connecting shaft is installed at the front end of the gear motor body, a sliding groove is formed in the surface of the connecting shaft, and a fixing plate is fixedly connected into the sliding groove. One end of the fixing plate is fixedly connected with a limiting rod, the tail end of the limiting rod is fixedly connected with the interior of the sliding groove, the surface of the limiting rod is slidably connected with a sliding block, the interior of the sliding groove is rotatably connected with an arc-shaped plate, and the top end of the sliding block is rotatably connected with a connecting plate. According to the gear motor protection device, automatic heat dissipation can be carried out when the gear motor main body runs, so that the gear motor main body can be kept at a moderate temperature when running, the aging of an insulating material, the copper loss of a winding and the damage of parts such as a bearing are reduced, and the effective protection of the gear motor main body is realized.

The utility model discloses a kind of power inductors, by the cooperation base assembly of a group of magnetic ring splicing into annular cylinder with prefabricated flat coil, wherein flat coil is annular winding with turn gap zero under prefabricated state, flat coil is reversed and folded to show fin ring under assembly state, two free ends of flat coil are extended in parallel in two states, magnetic ring is inserted in fin ring and is bonded to receive port, under the state that flat coil wraps closed loop magnetic ring, two free ends are penetrated and fixed to base. The inductor effectively solves the production problem of using flat wire to wind circular power inductor by optimizing the variable shape of flat coil prefabrication and assembly and splitting and splicing magnetic ring for embedded assembly, effectively improves the current-carrying capacity of inductor device, improves its DC-DC Converter Buck circuit conversion efficiency under the condition of reducing copper loss and iron loss.

The invention provides a stator, a motor, a pump body and a vehicle. The stator comprises a stator iron core, and the stator iron core comprises a first punching sheet and a second punching sheet, the first punching sheet is located between the two punching sheet groups, and each punching sheet group comprises n second punching sheets; each of the first punching sheet and the second punching sheet comprises a yoke part; each tooth part comprises a tooth body and a tooth boot, and the tooth bodies are connected between the inner peripheral wall of the yoke part and the tooth boots; in the circumferential direction of the stator core, the width of the tooth body of the first punching sheet is recorded as t0, and the width of the tooth body of the ith second punching sheet is recorded as ti; along the axial direction of the stator iron core, the thickness of the first punching sheet is recorded as d0, and the sum of the thicknesses of the two punching sheet groups is recorded as d1; wherein 0.7 < = ti / t0 < = 0.85, 0.1 * d0 < = d1 < = 0.3 * d0, i and n are positive integers, i < = n, and n > = 1. According to the invention, the relation among ti, t0, d1 and d0 is reasonably set, so that the performance of the motor is considered under the condition of reducing the size of the end part of the winding of the motor, and the reduction of copper loss and the improvement of the efficiency of the motor are facilitated.

The invention discloses a double-short-distance stator winding, a motor stator and a motor, the double-short-distance stator winding is wound in iron core grooves of a stator iron core, the number of layers of the iron core grooves of the stator iron core is n, the number of the grooves of each pole and each phase is m, the number of pole pairs is p, the number of the grooves is s, and the pole distance is tau; wherein m is equal to s / (2p * 3), and tau is equal to s / 2p; a phase winding on the stator core comprises a plurality of winding units, each winding unit comprises a plurality of winding cycles, each winding cycle comprises x interlayer span tau-1 coils, one same-layer span tau coil and x interlayer span tau-1 coils which are sequentially connected, and the winding cycles are sequentially connected through the same-layer span tau-1 coils; if the number n of layers is an even number, x = (n-2) / 2, and if the number n of layers is an odd number, x = (n-1) / 2. Through the winding structure of mostly short-distance linear coils, the overall tidy winding structure realizes the effects of reducing the copper consumption of the stator winding and reducing the resistance and the copper loss.

The application discloses a kind of self-adapting permanent magnet synchronous motor fault-tolerant control methods based on dynamic phase-locked loop, first, by analyzing the operating characteristics under minimum copper loss mode and maximum torque mode, a unified reference current strategy is constructed in harmonic subspace.Second, the second-order generalized integrator phase-locked loop is used to extract the fault current angle, ensuring that reliable angle estimation can be achieved under light load conditions.In addition, the fault angle information obtained by identification is used to adjust the current reference parameters, allowing flexible switching between minimum copper loss and maximum torque operating modes without the need for additional control structures related to fault types.The application has a smooth dynamic process when the motor switches from the fault state to the fault-tolerant running state without additional hardware.

This invention proposes a power modulation system, comprising: a rectifier unit having a first input terminal, a second input terminal, a first output terminal, and a second output terminal, wherein the first input terminal and the second input terminal are connected to an AC power grid, and the rectifier unit is used to convert AC power into DC power; a power factor correction unit connected in parallel between the first output terminal and the second output terminal; the power modulation system further includes a filter unit having a third capacitor element and a switching element, and connected in parallel between the first output terminal and the second output terminal. The power modulation system proposed in this invention effectively improves the power factor when the brushless motor is running at high speed, and ensures output torque and reduces motor copper losses when the brushless motor is running at low speed.

The application provides a method and system for separating and measuring AC copper loss and iron loss of a motor, comprising: manufacturing a partial stator body of an N-line and 2N-line motor per slot as a test object; testing total loss data and external circuit characteristic parameters of the partial stator body per slot under a load operation; obtaining a difference value of AC copper loss; correcting a simulation model of AC copper loss of the motor by using the obtained difference value of AC copper loss, and outputting AC copper loss of the motor per slot under different rotating speeds and different torques; performing no-load testing by using a non-magnetic rotor to obtain no-load loss; obtaining iron core loss according to the total loss, copper loss and no-load loss obtained by testing the N-line and 2N-line stator; correcting an iron core loss simulation model of the motor by using the obtained iron core loss value, and outputting the iron core loss of the motor per slot under different rotating speeds and different torques. The application can separate and calculate the AC copper loss and the iron core loss of the motor.

The embodiment of the application discloses a kind of average torque / suspension force control methods for bearingless motor, it is related to motor control technical field, for bearingless motor high-speed operation when suspension winding current is difficult to track, instantaneous suspension force is difficult to control, and the current distribution of traditional control method is not optimized torque and suspension force, resulting in the problem of higher motor copper loss, a kind of bearingless motor average torque / suspension force control method is presented.According to motor control target and constraint condition, current collaborative optimization algorithm is used to distribute winding current, while ensuring motor electric and suspension performance under high-speed operating condition, reduce system copper loss, improve motor efficiency.

The invention discloses a permanent magnet synchronous linear motor optimal current control method based on a magnetic equivalent circuit model, and the method comprises the steps: considering the nonlinear behavior of a motor, building an accurate MEC model suitable for a PMLSM for a stator part, an air gap part and a rotor part through the electromagnetic quantity of the motor, and building an electromagnetic parameter and thrust balance equation; therefore, an accurate motor thrust expression is obtained, and an optimal current control strategy considering thrust accuracy and coil copper loss minimization is further designed based on the motor thrust expression. According to the MEC model and the corresponding optimal current control strategy, the calculation burden can be reduced on the basis that the model precision is ensured, meanwhile, accurate control over the position and thrust is achieved, the optimal current strategy can further reduce copper loss and improve the efficiency of the system, and high research value and application value are achieved.

This invention provides a permanent magnet synchronous motor rotor and a permanent magnet motor. The permanent magnet synchronous motor rotor includes a rotor core and permanent magnets. The permanent magnets include a primary permanent magnet and a secondary permanent magnet connected to each other. The rotor includes multiple magnetic poles, with a magnetic pole boundary line between two adjacent magnetic poles. The center line of the primary permanent magnet is inclined with respect to its nearest magnetic pole boundary line, forming a non-zero angle A. The center line of the secondary permanent magnet is also inclined with respect to its nearest magnetic pole boundary line, forming a non-zero angle M. M and A satisfy the following relationship: 0.3 ≤ M / A. According to this invention, the angle between the primary and secondary permanent magnets and the armature magnetic field lines can be increased, reducing the demagnetization rate of the primary and secondary permanent magnets, thereby improving the motor's anti-demagnetization capability. Simultaneously, it increases the magnetic flux supplied by the primary and secondary permanent magnets to the air gap, increasing the motor's flux linkage, reducing the motor's operating current, reducing copper losses, and improving motor efficiency.

The invention discloses an axial flux motor for flywheel energy storage, which comprises a stator, three-phase double-layer armature windings and paired rotors, the three-phase double-layer armature windings are all arranged on the stator, and the stator is arranged between the paired rotors; each of the paired rotors comprises a rotor iron yoke and a permanent magnet ring, the permanent magnet ring is arranged on the rotor iron yoke, the permanent magnet ring comprises a plurality of permanent magnets, the permanent magnets abut against one another to form the permanent magnet ring, and the magnetizing directions of the permanent magnets corresponding to the paired permanent magnet rings in the axial direction of the axial magnetic flux motor are the same, so that the paired permanent magnet rings form an NN type magnetic circuit structure. The axial magnetic flux motor not only can utilize axial magnetic flux, but also can utilize circumferential magnetic flux, so that the power density of the motor is effectively improved; and a vertical winding structure in the three-phase double-layer armature winding is arranged at the end part of the inner side of a traditional winding, so that copper consumption is reduced while copper is saved, the heat dissipation difficulty of a flywheel energy storage system running in a vacuum environment is reduced, and the overall efficiency of the system is improved.

The application discloses a kind of high-efficiency magnetic power device for large-tonnage loader and design method thereof, the stator lamination of the stator is provided with at least 60 stator slots uniformly distributed in the circumferential direction, and the corresponding motor slot number;The magnetic power device is a three-phase motor;The rotor adopts 10-pole permanent magnet rotor structure, the armature winding adopts double-layer lap winding structure, the pole pitch τ of the motor is set to 6, short-pitch winding is used, the rotor lamination of the rotor adopts V-shaped magnetic steel topology structure, each pole corresponds a group of V-shaped arrangement of embedded permanent magnet, and the opening of V-shaped arrangement of permanent magnet faces the annular air gap side, the tip of V-shaped arrangement of permanent magnet faces the rotating axis of the rotor, and the magnetic barrier structure is formed between the two permanent magnets of the same pole.The application significantly reduces the motor load copper loss, and finally realizes the highest operating efficiency of the motor reaches 98%, adapts to the working condition of large-tonnage loader.

The invention discloses a motor control method and device, a motor, a storage medium and a computer program product, and the method comprises the steps: building a multi-type loss model of a driving system of the motor, and the multi-type loss model at least comprises copper loss, iron loss, switching loss and conduction loss; determining an initial current reference value of the motor based on a multi-type loss model; injecting a preset signal into the current loop, and performing online optimization on a current angle corresponding to the initial current reference value; and adopting a preset current prediction control strategy to adjust the optimized current so as to control the operation of the motor. According to the scheme, the global loss of the permanent magnet synchronous motor system is minimized, the high dynamic response capability of a current loop is improved, and the problem that high efficiency and high performance are difficult to consider in a complex working condition is solved.

This motor includes: coils (3a to 3i) of a plurality of electromagnetic actuators among which the values of one of an electric resistance and an induced voltage constant are different; a movable element (1) being a driven body driven by the coils (3a to 3i) of the electromagnetic actuators; and a current command value determination unit (23) that determines a command value of a current caused to flow through the coil of each of the electromagnetic actuators in order to control an operation of the movable element (1). The current command value determination unit (23) determines the current command value for the coil of each of the electromagnetic actuators, so as to minimize a total sum of copper losses occurring in the coils (3a to 3i) of the plurality of electromagnetic actuators, on the basis of the values of the one of the electric resistance and the induced voltage constant of the coils (3a to 3i) of the electromagnetic actuators.

The invention provides an intelligent cooling control method and system for a wind generating set. The method comprises the steps that current, voltage and rotating speed signals of a motor stator are collected; copper loss power and iron loss power are calculated according to the motor loss model, and comprehensive heating power is obtained; a heat balance equation is established according to the heating power change rate and the environment temperature, the motor temperature rise trend is predicted, and the cooling power requirement is calculated. According to the method, a motor loss model is introduced in the cooling control process, and the copper loss power and the iron loss power are calculated by using real-time electrical parameters such as stator current, voltage and rotating speed of the motor, so that the comprehensive heating power of the motor is calculated, a heat balance equation is established, and the dynamic prediction of the actual heat load is realized; the main control unit adjusts the operation power of the cooling fan and the liquid cooling pump according to the predicted cooling power, so that the cooling energy consumption and the heating power are kept in a self-balance state, and the problems of overcooling and energy waste in a traditional constant power or threshold starting and stopping mode are effectively avoided.

The invention discloses a two-phase open-circuit fault-tolerant control strategy under a minimum copper loss constraint of a dual three-phase SynRM, and the strategy comprises the steps: respectively deducing the synthetic magnetomotive force of a residual winding, constructing a quadratic optimization model with linear constraint, and optimizing the current amplitude for the open-circuit faults of orthogonal and non-orthogonal two-phase windings, so as to enable the direction of the synthetic magnetomotive force to meet the requirements; establishing a static coordinate and a rotation transformation matrix after the fault, and performing orthogonality correction; a virtual voltage vector is synthesized based on weighted superposition of the original vectors, and a corresponding virtual voltage vector set is constructed for the two faults; and on the basis of the corrected transformation matrix and the virtual voltage vector set, constructing a voltage vector distribution diagram and a switch table in a fault state, dividing an alpha-beta subspace into 16 sectors, and selecting an optimal virtual voltage vector to realize accurate control of the flux linkage amplitude and the electromagnetic torque. Stable operation of the motor can be maintained, and the fault-tolerant capability and the operation reliability of the system are remarkably improved.

The application belongs to the technical field of power electronic components and devices, and relates to a linear high-current high-integration plane transformer, which comprises a magnetic core and a winding of PCB material, the magnetic core columns are arranged in two rows and multiple columns, and two magnetic core columns corresponding to a row position form a core column group in pairs; the winding comprises a primary winding and a secondary winding; the primary winding is arranged in the inner layer of the PCB, and the primary winding is folded back to form a closed loop after penetrating through all the magnetic core windows in sequence; the secondary winding comprises a PCB surface layer secondary winding and a PCB inner layer secondary winding; the secondary winding is provided with a secondary alternating current via hole and a secondary direct current via hole, the secondary alternating current via hole is arranged at the shortest path of alternating current, and the secondary direct current via hole is arranged at the shortest path of direct current; the application greatly reduces the number of winding turns, shortens the conductive path of the winding, effectively reduces the copper loss of the winding under a high-current working condition, and adapts to a low-voltage high-current output scene.

The invention discloses an average temperature rise calculation method for a variable-speed constant-power permanent magnet synchronous motor, and belongs to the technical field of motor temperature field calculation. The method comprises the steps of deducing a motor total loss model with a variable being a rotating speed under a variable-speed and constant-power working condition based on an iron core loss and winding copper loss calculation formula of the motor, so as to obtain a loss-rotating speed characteristic curve of the motor under the constant-power working condition; calculating the average loss of the motor in the constant-power rotating speed interval based on an area equivalence principle, and obtaining an equivalent rotating speed point corresponding to the average loss of the motor according to the loss-rotating speed characteristic curve; and calculating the steady-state temperature rise of the motor at the equivalent rotating speed point through a finite element method, and taking the steady-state temperature rise as the average temperature rise of the variable-speed constant-power permanent magnet synchronous motor in the rotating speed interval. The method for calculating the average temperature rise of the permanent magnet synchronous motor under the variable-speed constant-power working condition has the remarkable advantages that huge consumption of calculation resources by a finite element method is avoided, the solving time is remarkably shortened, and meanwhile high calculation precision is kept.

The application belongs to the technical field of vehicle braking system, and discloses a segmented pole arc motor for an electronic mechanical braking system, a use method and a vehicle.The motor comprises a stator and an inner rotor, the stator adopts a split tooth structure, is provided with an alternating current armature winding and a direct current excitation winding, and the rotor is provided with segmented pole arc permanent magnets, so that the motor forms a hybrid excitation structure in which a permanent magnet magnetic field and an excitation magnetic field are superposed.Through segmented optimization of the pole arc of the permanent magnet, the air gap magnetic flux waveform is improved, the cogging torque and torque ripple are reduced, and the running stability is improved; equivalent flux linkage is controlled by adjusting the excitation current, the no-load speed is improved in the braking gap elimination stage, and the armature current and the locked-rotor copper loss are reduced in the clamping force following and maintaining stage.The cogging torque, torque ripple and locked-rotor copper loss are reduced in the structural level and the control level, and the application is suitable for stable and reliable work of the electronic mechanical braking system under various working conditions.

The application discloses a coreless double-rotor axial flux motor and belongs to the technical field of axial flux motors. The coreless double-rotor axial flux motor comprises a shell assembly, a rotor assembly and a stator assembly. The shell assembly is formed by a first shell body and a second shell body which are mutually butted to form a cavity. The rotor assembly comprises a rotating shaft which axially passes through the shell assembly, a rotor yoke and a circular ring magnet which are symmetrically fixed on the rotating shaft. The stator assembly is fixed between the two circular ring magnets and comprises a stator potting glue body and a stator coil inside. The stator coil is arranged in a ring array and adopts a cross-pole continuous winding structure to form a geometric shape closed loop which has a closed end on one side and has no end on the other side. The application eliminates the inter-phase bridge wire in the traditional winding, simplifies the automatic winding and stator assembly process, reduces the connection failure risk, reduces the invalid copper wire segment, effectively reduces the direct current resistance and copper loss of the motor by shortening the overall wire length of the winding, suppresses the operation heat and improves the operation efficiency of the motor.

This invention belongs to the technical field of magnetic levitation motion control and conveying systems. It provides a method and system for real-time distribution of six-degree-of-freedom generalized forces in a magnetic levitation planar motor. First, a physical model of the magnetic levitation planar motor is established, and the real-time position coordinates of the mover in the stator coordinate system are obtained. A constraint coefficient matrix representing the balance of the six-degree-of-freedom generalized forces is constructed. A quadratic convex optimization projection model is used, with minimizing coil copper loss as the objective function and generalized force balance as the constraint condition. Based on the Lagrange multiplier method, the forces on each coil in the model are optimized to obtain the minimum force on each coil group at any position of the mover throughout its stroke, thereby reducing the coil current and achieving low power consumption for the six-degree-of-freedom motion of the mover. This invention has the advantages of low computational complexity, real-time processing of force distribution tasks at any position of the mover throughout its stroke, and effective reduction of system heat dissipation.

This invention discloses a method for rapidly calculating and generating a high-fidelity efficiency MAP for a permanent magnet synchronous motor (PMSM). The steps are as follows: 1. Construct a saturated flux linkage model and a speed-scalable iron loss model in parallel, and calculate the torque matrix model without considering the iron loss effect; 2. Calculate the speed-torque envelope of the PMSM using the model from step 1; 3. Select the speed-torque combination required for calculating the efficiency MAP within the speed-torque envelope, and use the efficiency-optimal current search method for the PMSM considering the iron loss effect to search for the current operating point and corresponding iron loss for each operating condition, and calculate the copper loss; 4. Generate the efficiency MAP using the iron loss and copper loss from step 3. This method can accurately and quickly calculate the motor efficiency MAP under efficiency-optimal current control, MTPA, and field weakening control modes, requiring only a small amount of finite element calculations, avoiding a large number of repeated experiments or finite element calculations. The calculation process considers the influence of iron loss on torque, and the calculated efficiency MAP has high fidelity.