38 results about "Armature current" patented technology

An electromagnetic transient modeling method and system for a high-efficiency synchronous machine, and, a device. The method comprises: predicting, of a synchronous machine, a first rotor angular velocity, a first rotor angle, and a first current q component of and a first current d component of an armature current, establishing a first Norton circuit for simulating the synchronous machine, and solving at the same time a second Norton circuit after equivalent transformation and a network conductance matrix so as to obtain a three-phase voltage of a synchronous machine port; according to the three-phase voltage, obtaining a second current q component, a second current d component, a second rotor angular velocity and a second rotor angle; and by means of error-controlled iterative solving, determining an electromagnetic transient simulation calculation result of the synchronous machine.

The smart torque simulation device includes: a bracket; a shaft center; a winding wheel which having a winding wheel spinning encoder; an outer flywheel which an outer flywheel spinning encoder, the winding wheel and the outer flywheel are relatively coupled with a magnetic plate and a magnet; an inner flywheel with a field magnet, the inner flywheel has a power transmission relationship with the outer flywheel; a coil set, having a coil fixing frame which has an armature coil, and the armature coil is coupled to the field magnet of the inner flywheel, the armature coil has an electric current regulator; and a control system, receiving a winding wheel spinning data from the winding wheel spinning encoder and receiving an outer flywheel spinning data from the outer flywheel spinning encoder, and then sending an armature electric current control data to the electric current regulator.

This invention belongs to the field of electric vehicle motors, and particularly relates to a flux-controllable hub motor and its design method. This invention simultaneously constructs a "self-leakage magnetic circuit" and an "inter-pole leakage magnetic circuit" on the rotor. By changing the armature current under different operating conditions, the leakage magnetic flux and effective magnetic flux of the motor are jointly adjusted, which helps to improve output torque and widen the speed range. Furthermore, by rationally designing key parameters such as the length of the inter-pole leakage magnetic circuit and the length of the self-leakage magnetic circuit on the motor's leakage magnetic circuit, the d-axis flux linkage is increased in low-speed conditions and decreased in high-speed conditions, ultimately achieving enhanced flux controllability across all operating conditions.

The application relates to the technical field of motor control, and discloses a torque adjustment control method for a magnetic stirrer based on sample characteristics, which comprises the following steps: acquiring three-phase armature currents and a rotor position signal, converting the three-phase armature currents and the rotor position signal into measured cross-axis currents and measured direct-axis currents by using a coordinate transformation logic; extracting a magnetic deflection angle estimation value reflecting the phase lag degree of a stirrer based on an electromagnetic coupling model; calculating a magnetic deflection angle change rate according to the magnetic deflection angle estimation value in a continuous sampling period; generating a transient compensation current by using a nonlinear compensation operator and combining a real-time synchronous torque coefficient; and superimposing the transient compensation current on the cross-axis current instruction to generate a compensation torque by fine-tuning the rotating angular velocity of the armature magnetic field. The application realizes real-time sensing of load disturbance by using the transient characteristics of the magnetic deflection angle, effectively suppresses magnetic force coupling slip caused by sudden changes in sample characteristics, guarantees the stability of the system, and reduces the invalid temperature rise of the motor.

The invention provides an inner stator W-shaped modular magnetic field modulation hybrid excitation motor, which is used for solving the technical problem that the existing hybrid excitation motor cannot adjust the magnetic field. The motor comprises an outer rotor and a modular stator which are sequentially arranged from outside to inside in the diameter direction, and an air gap is formed between the outer rotor and the modular stator; a winding is arranged in the middle of the modular stator, and armature current and direct-current bias current are introduced into the winding; a plurality of virtual slots are formed in the middle of the outer circumference of the modular stator, a plurality of virtual teeth are generated between the adjacent virtual slots and between the outermost virtual slot and the edge of the modular stator, and permanent magnets are arranged in the virtual slots. According to the invention, the modularized stator and the magnetic field modulation hybrid excitation motor are combined, so that the torque density is improved, and the flexible adjustment of the air-gap magnetic field can be realized at the same time; meanwhile, the stator space contradiction can be relieved, the demagnetization risk of the permanent magnet is reduced, the magnetism adjusting efficiency is improved, and the motor loss is reduced.

The invention specifically relates to a dual three-phase permanent magnet synchronous motor winding fault diagnosis and positioning method, and belongs to the technical field of motor fault diagnosis. Comprising the following steps: firstly, collecting armature current and carrying out clark conversion to obtain current components of planes of two sets of windings, calculating a current difference value of the corresponding component, extracting a half-cycle effective value as a fault diagnosis characteristic, and calculating a phase angle of a current vector as a fault positioning characteristic; the method provided by the invention can diagnose whether the winding has a fault on line and determine the type and position of the fault. The method disclosed by the invention is of great significance for improving the operation reliability and the maintenance convenience of the dual three-phase permanent magnet synchronous motor.

The invention provides a permanent magnet synchronous motor for flywheel energy storage, and belongs to the technical field of motor rotor structures. The stator sleeves the rotor, and an air gap is arranged between the stator and the rotor. The rotor fixedly sleeves the rotating shaft. The rotor comprises a rotor iron core, a permanent magnet group, a magnetic bridge, a magnetic barrier group and a magnetic barrier isolation group; the rotor iron core is coaxially assembled on the inner side of the stator iron core, an air gap is formed between the rotor iron core and the stator iron core, the permanent magnet sets are arranged in the rotor iron core, located at the axis position of a rotor straight shaft and connected with the magnetic barrier sets, magnetic bridges are arranged between adjacent magnetic barriers in the magnetic barrier sets, and the multiple magnetic barrier sets are all arranged on the edge of the rotor iron core. And two adjacent magnetic barrier groups are symmetrically arranged on the two sides of the axis of the rotor straight shaft. The magnetic field sinusoidal property can be improved, the iron core loss is reduced, the temperature rise of the motor is reduced, the direct-axis inductance of the motor is larger than the quadrature-axis inductance, the counter electromotive force of the motor is small during no-load, and the corresponding no-load loss is low; and the stable terminal voltage is maintained by adjusting the armature current during loading.

This invention presents a method for improving the torque performance of an electrically excited doubly salient pole motor based on current-coordinated control. By analyzing the influence mechanism of excitation current and armature current on the magnetomotive force, the concept of equivalent current is proposed, and the excitation current and armature current are equivalently converted. Based on this, a current-torque model is established to derive the current distribution ratio that maximizes the output torque, optimizing the allocation of excitation current and armature current. Furthermore, this invention employs an asymmetric current control method, which effectively utilizes reluctance torque for compensation, further improving the average torque and significantly reducing torque ripple. This invention can calculate the optimal current distribution ratio in real time under low-speed and dynamic operating conditions, achieving dynamic adjustment of excitation current and armature current, and significantly improving the torque output capability of the electrically excited doubly salient pole motor. This invention is suitable for applications with stringent requirements for torque output performance, such as aircraft starting systems.

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 stator (20) has a stator core (30) provided with an armature slot (35a) and an excitation slot (35b), an armature winding (40) housed in the armature slot (35a), an excitation winding (50) housed in the excitation slot (35b), and a first excitation magnet (70). The armature winding (40) generates a rotating magnetic field that rotates the rotor (10) by being supplied with an armature current (i40). The excitation winding (50) generates excitation magnetic flux (M50) by being supplied with an excitation current (i50). The first excitation magnet (70) is capable of changing the magnetic force using the excitation magnetic flux (M50).

The invention discloses an electric bicycle motor health assessment system based on multi-sensor fusion, and particularly relates to the technical field of electric bicycles, comprising an intelligent sensor acquisition module for acquiring armature current, terminal voltage, winding temperature and magnetic field change; the data fusion processing module generates a fusion signal sequence representing the transient behavior of the motor through time domain-frequency domain collaborative fusion based on an adaptive weighted multi-source fusion algorithm; the motor health state modeling module constructs an electromagnetic performance, thermal-electric coupling and vibration response multi-physical field coupling health assessment model, and generates a motor health measurement index through cross consistency correction; the adaptive diagnosis output module generates a health level, and triggers a dynamic threshold re-calibration mechanism when the health level is abnormal. According to the method, multi-dimensional and high-precision motor health assessment is realized, the full-load working condition and the full life cycle of the motor are adapted, the rate of missing report and false report is reduced, a precise basis is provided for maintenance, and the problems of single traditional assessment method, poor adaptability and the like are solved.

The embodiment of the present disclosure provides a kind of thermal parameter identification and permanent magnet temperature fast prediction method, equipment and medium, belong to data identification technical field, specifically include: analysis motor structure, abstract main thermal path node;Initial thermal resistance network is constructed;Fitting copper consumption change formula;Fitting iron consumption change formula;According to initial thermal resistance network, copper consumption change formula and iron consumption change formula, construct transient temperature solution matrix;Motor is respectively carried out multiple different armature current, rotational speed temperature rise test;According to test result and transient temperature solution matrix, using particle swarm algorithm to the thermal resistance and heat capacity in initial thermal resistance network are carried out parameter identification and are optimized based on least square objective function, solve the target thermal resistance network of motor;Based on target thermal resistance network, copper consumption change formula and iron consumption change formula, combine motor working condition information, the permanent magnet temperature of motor is carried out real-time prediction.Based on the scheme of the present disclosure, improve the prediction efficiency, accuracy and real-time.

The application relates to the technical field of permanent magnet motors, in particular to a saliency ratio reversible degree enhanced permanent magnet motor and a design method thereof. The permanent magnet motor comprises a rotating shaft, a rotor sleeved on the rotating shaft, and a stator coaxially sleeved on the outside of the rotor. Eight trapezoidal magnetic barriers with the centers on q axes and eight bread-type permanent magnets with the centers on d axes are staggeredly embedded in the rotor along the circumferential direction. The bread-type permanent magnets are magnetized along the thickness directions and the magnetization directions are opposite. A bulb-type magnetic barrier in contact with the bread-type permanent magnet is arranged on the two sides of each bread-type permanent magnet. The application ingeniously introduces multiple variable magnetic resistances in the rotor by changing the armature current under different working conditions, instead of a single magnetic resistance, so that the target of enhancing the saliency ratio reversibility under all working conditions is achieved while the magnetic flux leakage and the effective magnetic flux of the motor are changed, and the performance requirements of different working conditions can be met.

The invention relates to the technical field of motors, in particular to an outer rotor brushless motor suitable for an environmental electric appliance and a pole slot matching method of the outer rotor brushless motor. Comprising a rotor assembly and a stator assembly. The rotor assembly comprises a rotor casing and rotor magnetic steel fixed on the inner wall of the rotor casing, and N poles and S poles of the rotor magnetic steel are uniformly distributed in a staggered manner; the stator assembly comprises a stator iron core and an armature winding wound on the stator iron core; the number of pole pairs of the rotor magnetic steel is P, and P is an even number greater than 7; the number of pole teeth of the stator core is Z, and Z is an integer greater than 12 and can be exactly divided by 3; according to the structure and the method, the number Z of pole teeth of a stator core is matched with the number P of pole pairs of rotor magnetic steel to suppress electromagnetic vibration caused by armature current harmonic waves and reduce cogging torque, so that the outer rotor brushless motor can suppress the electromagnetic vibration caused by the armature current harmonic waves and reduce the cogging torque; the mute performance of the motor is improved, the operation noise is reduced, and the motor can be better suitable for environmental electric appliances.

According to the electric excitation doubly salient motor torque performance improving method based on current coordination control, the concept of equivalent current is provided by analyzing the influence mechanism of excitation current and armature current on magnetomotive force, and equivalent conversion is carried out on the excitation current and the armature current. On the basis, a current-torque model is established, so that the current distribution ratio enabling the output torque to be maximum is deduced, and distribution of exciting current and armature current is optimized. In addition, an asymmetric current control method is adopted, and the strategy effectively utilizes the reluctance torque for compensation, so that the average torque is further improved, and the torque pulsation is remarkably reduced. According to the method, the optimal current distribution ratio can be calculated in real time under the low-speed and dynamic working condition, dynamic adjustment of the exciting current and the armature current is achieved, and the torque output capacity of the electro-magnetic doubly salient motor is remarkably improved. The method is suitable for application occasions with strict requirements on torque output performance, such as an aviation starting system.

The invention discloses a start-stop control method and system for a roller shutter door, relates to the technical field of roller shutter door control, and realizes real-time digital representation of an operation state based on synchronous sampling of a door body linear speed Vrun, a direct current bus voltage Udc, an armature current Iarm and a back electromotive force Uemf. The current displacement Hc is obtained by calculating the proportion of the accumulated pulse number Nc and the total pulse number Nt, the residual stroke Hr is further calculated, the tail section operation interval can be accurately recognized and the tail section entering speed Venter can be extracted before the roller shutter door reaches the physical limit, and therefore the follow-up kinetic energy index Qke can be calculated on the basis of actual operation data. Compared with the prior art, the roller shutter door control method has the advantages that the roller shutter door control method does not depend on fixed preset parameters, adaptivity of energy calculation and control strategies is improved, real-time state-based end section recognition is achieved by continuously collecting and calculating operation parameters in the data set Dat, and the roller shutter door can accurately judge the end section entering moment and perform adaptive adjustment.

The invention provides a model prediction control method and system for efficiency improvement of a permanent magnet synchronous motor, and belongs to the technical field of efficiency improvement of the permanent magnet synchronous motor, and the method comprises the steps: obtaining the armature current of the permanent magnet synchronous motor, and carrying out a series of coordinate transformation on the obtained armature current to obtain dq-axis current; inputting the obtained dq-axis current into a motor circuit model to obtain active current and iron loss current of the dq axis; inputting the active current of the dq axis and the iron loss current into a model prediction equation to obtain predicted active current of the dq axis after the next two time periods; and substituting the dq-axis active current after the next two time periods into a cost function to obtain an optimal switching signal, and controlling the operation of the motor based on the optimal switching signal.

The application discloses a pinch detection method and system based on a motor dynamics model, which comprises the following steps: acquiring the current angular velocity and armature current of a seat motor in real time; based on the motor dynamics equation and the motor electrical model, combining the speed component generated by the current angular velocity and the armature current load component after stripping the inertia component, obtaining the comprehensive pinch force including the speed pinch force and the torque pinch force; judging whether the comprehensive pinch force meets the preset trigger condition; if the trigger condition is met, the corresponding pinch response is executed. The application can accurately eliminate the inertia interference generated by the system acceleration and deceleration without accurate calibration of the rotational inertia, which eliminates the large-scale artificial calibration cost, significantly improves the sensitivity and robustness of the pinch detection in mechanical aging and complex environment, is suitable for the pinch protection of movable parts driven by the motor such as automobile seats, electric doors and windows, and has the advantages of strong self-adaptation, high precision and good robustness.

The invention belongs to the field of electric automobile motors, and particularly relates to a magnetic flux controllable hub motor and a design method thereof. According to the invention, a self-leakage magnetic circuit and an inter-pole leakage magnetic circuit are constructed on the rotor at the same time, and the leakage flux and effective flux of the motor are jointly adjusted through the change of armature current under different working conditions, so that the output torque can be improved and the speed regulation range can be widened; besides, through reasonable design of key parameters such as the interelectrode flux leakage magnetic circuit length and the self-flux leakage magnetic circuit length on the motor flux leakage magnetic circuit, the d-axis flux linkage under the low-speed working condition is improved, the d-axis flux linkage under the high-speed working condition is reduced, and finally the magnetic flux controllability under the full working condition is enhanced.

The invention provides a method for detecting large spark of a shunt excitation direct current motor, and belongs to the technical field of motor control. The method comprises the following steps: acquiring an armature current signal and an exciting current signal of the shunt excitation direct current motor, firstly performing band-pass filtering on the armature current signal and the exciting current signal; noise interference is removed, high-frequency spark pulse signals are reserved, then wavelet analysis is carried out on the signals, the energy change rate of the high-frequency part of detail signals is used as a fault characteristic quantity, a fault diagnosis threshold value is set, real-time online detection is carried out, and the requirements of online monitoring and non-contact detection are met; the sensor is installed in a non-contact mode, data acquisition and processing processes are both carried out in a motor operation state, real-time on-line monitoring is achieved, normal operation of the motor is not affected, and extra mechanical loss caused by contact type measurement is avoided. Meanwhile, the method can identify early latent abnormity with large sparks, overcomes the problem of poor universality of an existing detection method, and is beneficial to popularization and application.

The present invention discloses a brushed DC motor parameter identification method based on fuzzy adaptive control. By providing a high-frequency sinusoidal armature current command to the brushed DC motor and performing fuzzy adaptive PI control, the current loop parameters Kp and Ki are obtained and used for closed-loop control for motor parameter identification. Given two high-frequency square wave armature current commands with different amplitudes, the identification resistor R is obtained using a differential method based on the acquired steady-state flat-top armature current and the corresponding steady-state effective armature voltage. a Given a sinusoidal armature current command, based on the acquired armature current i a and the calculated effective armature voltage u a and identification resistor R a The identification inductance is obtained using the least squares method. Given a step armature current command, the inductance is determined based on the armature current i. a Armature voltage u a Motor speed n, armature resistance R a The back electromotive force constant K is obtained using the least squares method. e The method described in this invention can reliably and accurately identify the parameters of a brushed DC motor when the motor is stationary, and it has versatility.

The application provides a track topology mapping, positioning and predictive control method and system based on electrical load fingerprints, which comprises the following steps: acquiring motor armature voltage signals and motor armature current signals of a motor driving device in real time; estimating the real-time rotating speed of the motor according to the motor armature voltage signals and the motor armature current signals, and time-integrating the real-time rotating speed to obtain real-time virtual mileage; mapping the motor armature current signals in the time domain to the virtual mileage coordinate system to form the motor armature current signals in the space domain, and taking the motor armature current signals in the space domain as the current load characteristic signals; performing sequence matching on the current load characteristic signals and the reference load fingerprint atlas to determine the absolute position of the motor driving device on the track; acquiring the road section characteristics within the predetermined virtual mileage ahead from the reference load fingerprint atlas according to the absolute position; and generating predictive safety instructions if the road section characteristics indicate that the area ahead is a high-load risk area. The application enhances the position sensing and intelligent control functions.

This invention discloses an airborne tree branch cutting control method based on force feedback, relating to the fields of power line channel maintenance and aerial robot contact operation control technology. The method includes collecting contact force component data, armature current data, and feed acceleration data during the cutting process; obtaining an estimated environmental equivalent stiffness using an environmental stiffness observation model; outputting the tree branch fracture probability using a fracture prediction model; mapping desired damping and desired stiffness using an adaptive impedance control architecture; and calculating adaptive position commands for the flight platform and torque limiting commands for the cutting motor. This invention uses the environmental stiffness observation model and fracture prediction model to perceive the tree branch's flexible deformation and fracture trend in real time. It uses the adaptive impedance control architecture and admittance control law to suppress the flight platform's forward momentum at the moment of tree branch fracture and uses current energy spectral density to identify micro-flutter spectrum characteristics in advance to adjust torque and prevent jamming, achieving precise and safe cutting in unstructured high-altitude environments.

A motor control device (12) includes a second setting unit configured to set an armature current command value and a current phase angle command value based on a rotational speed and a motor torque command value, and a current vector setting unit configured to set a d-axis current command value and a q-axis current command value based on the armature current command value and the current phase angle command value. The second setting unit is configured to set the armature current command value and the current phase angle command value so that an armature current vector set based on the d-axis current command value and the q-axis current command value is included in an area enclosed by an armature current vector locus in maximum torque / current control and a vertical axis in a d-q coordinate system.

The invention discloses an electromagnetic force fluctuation suppression method and device of a hybrid excitation motor and a linear motor, and aims to realize magnetic field adjustment of a transverse flux switching linear motor, reduce starting current and widen the speed regulation range of the motor. According to the electromagnetic force fluctuation suppression method, the amplitude, the frequency and the phase of the injected single-phase excitation current are calculated with the aim of introducing the excitation current with the minimum amplitude to suppress the permanent magnet thrust fluctuation to the maximum extent. Electromagnetic force fluctuation suppression can be carried out on the hybrid excitation motor with three-phase sine alternating current introduced into the armature winding by introducing single-phase excitation current into the excitation winding. Permanent magnet thrust fluctuation generated by interaction of the permanent magnet and the armature winding is suppressed by electromagnetic force generated by interaction of the excitation winding and the armature winding, high electromagnetic force density can be maintained while electromagnetic force fluctuation can be effectively reduced, and the injected single-phase excitation current is irrelevant to amplitude and phase of armature current, so that the permanent magnet thrust fluctuation is suppressed. The control method is simple.

The embodiment of the invention relates to the technical field of electric doors, in particular to an electric door control method, a controller, electric equipment and a storage medium. In the embodiment of the invention, the controller can calculate the characterization parameter of the current electromagnetic torque of the driving motor, and triggers an anti-pinch mechanism or an anti-collision mechanism based on the characterization parameter; the characterization parameters comprise a first parameter and / or a second parameter, and the first parameter is an integral value of the instantaneous armature current to time in a preset integral time interval and is used for characterizing the cumulant of the electromagnetic torque on the output shaft of the driving motor in the preset integral time interval; the second parameter is a differential value of the current instantaneous armature current of the driving motor to time and is used for representing the variable quantity of the electromagnetic torque on the output shaft of the driving motor. And the controller triggers an anti-pinch mechanism or an anti-collision mechanism based on the first parameter and / or the second parameter, so that the phenomenon that a user is pinched or the electric door collides with external articles can be improved.

The application discloses a motor temperature measurement method, which comprises the following steps: acquiring motor parameters, wherein the motor parameters comprise a hot spot temperature of a stator, an armature current of a stator winding and an output torque of a rotor; establishing a fuzzy temperature function of the rotor based on the motor parameters, and calculating a fuzzy temperature of the rotor based on the fuzzy temperature function; determining a fuzzy temperature interval of the rotor based on the fuzzy temperature, a temperature interval margin and an influence value of the motor parameters on the rotor temperature; determining a spectrum center wavelength interval of a fiber grating sensor based on the fuzzy temperature interval; and filtering and demodulating a signal reflected by the fiber grating sensor based on the spectrum center wavelength interval, so as to determine a final temperature of the rotor. Through the above arrangement, the measurement accuracy of the rotor temperature can be improved.

The invention relates to the technical field of motor driving, and discloses an alternating current and direct current superposed six-phase inverter design method, which comprises the steps of superposing direct current excitation and alternating current armature current on the same winding through a six-phase inverter, constructing a double three-phase cascade inverter topology, modulating a magnetic circuit, performing dynamic field weakening control, performing double-loop PI control and activating a high output mode. And the function design of each module of the six-phase inverter, such as robustness optimization and efficiency optimization control, is adopted, so that wide-speed-range high-efficiency driving is realized. According to the invention, a six-phase AC-DC superposition inversion topology is provided, a traditional three-phase control algorithm is compatible, efficient superposition of AC and DC in the same winding is realized through a dual-three-phase cascade structure and a voltage superposition mechanism, a basis is provided for wide-speed-range operation of the motor, single-winding dual-function is realized through virtual current reconstruction, and the efficiency of the motor is improved. Six-phase current is converted into virtual three-phase current, interference of direct-current components on a control algorithm is eliminated, and meanwhile, control strategies such as a high-output mode and robustness optimization are combined, so that the motor can keep good performance under different working conditions.

The invention provides a track topology surveying and mapping, positioning and predictive control method and system based on electrical load fingerprints. The method comprises the following steps: acquiring a motor armature voltage signal and an armature current signal of motor driving equipment in real time; estimating the real-time rotating speed of the motor according to the armature voltage signal and the armature current signal, and performing time integration on the real-time rotating speed to obtain a real-time virtual mileage; based on the real-time virtual mileage, mapping the armature current signal of the time domain to a virtual mileage coordinate system to form an armature current signal of a space domain, and taking the armature current signal as a current load characteristic signal; performing sequence matching on the current load characteristic signal and a reference load fingerprint spectrum, and determining an absolute position of the motor driving equipment on the track; according to the absolute position, obtaining road section features in a front preset virtual mileage from the reference load fingerprint spectrum; and if the road section feature indicates that the front is the high-load risk area, generating a predictive safety instruction. According to the invention, position sensing and intelligent control functions are enhanced.

This invention relates to the field of computer-aided design and discloses a magnetic circuit simulation design method for heavy-duty mechanical permanent magnet motors. The method includes: converting a geometric feature topology array into a spatial discrete topology node network; obtaining the transient air gap magnetic flux density tensor based on armature current excitation and extracting the local magnetic flux density distortion rate to determine the transformation ratio scalar; when the transformation ratio scalar reaches a threshold value of 1.15, locking the local grid region formed by the target discrete topology node and its eight neighboring topology nodes; updating the material magnetic energy product matrix using a dynamic state transition matrix, and halving the sampling step size of the local grid region from 100 μs to 50 μs to construct composite time boundary conditions. This invention constructs a spatially coordinated representation relationship of demagnetization evolution in the magnetic field's dedicated physical dimension, smoothing out spatiotemporal mismatches, eliminating numerical divergence, and ensuring that the simulation results are consistent with bench tests.