A method and system for determining the effect of high frequency signal injection on the electromagnetic field of an electric machine

Abstract

This invention discloses a method and system for determining the influence of high-frequency signal injection on the electromagnetic field of a motor, belonging to the field of motor control technology. The method includes: establishing a spatial distribution model of the magnetomotive force under three-phase sinusoidal alternating current excitation associated with the target motor; establishing a Maxwell magnetic field analytical model; establishing an air gap magnetic field distribution model of the target motor; establishing a mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor; simulating the air gap magnetic field distribution model based on the mapping relationship, and injecting a high-frequency signal of a preset frequency band during the simulation to output a simulated signal of the air gap magnetic field harmonics after the injection of the high-frequency signal; and determining the influence of the high-frequency signal injection on the electromagnetic field of the target motor based on the simulated signal. This invention provides a theoretical basis for selecting the high-frequency signal injected into the motor.

Description

Technical Field

[0001] This invention relates to the field of motor control technology, and more specifically, to a method and system for determining the effect of high-frequency signal injection on the electromagnetic field of a motor. Background Technology

[0002] The motor body with high-frequency harmonic suppression features has certain characteristics in terms of armature winding arrangement, stator and rotor tooth profile. How to understand and design a motor body that meets the control requirements is a key technical problem that needs to be solved. Summary of the Invention

[0003] To address the above problems, this invention proposes a method for determining the influence of high-frequency signal injection on the electromagnetic field of a motor, comprising:

[0004] Based on the influence parameters of the air gap magnetic field harmonics affecting the target motor, a spatial distribution model of the magnetomotive force under three-phase sinusoidal AC excitation associated with the target motor is established.

[0005] The air gap magnetic field distribution of the target motor is determined based on Maxwell's spatial electromagnetic field analysis, and a Maxwell magnetic field analytical model is established based on the determined air gap magnetic field distribution of the target motor.

[0006] The spatial distribution model of the magnetomotive force and the analytical model of Maxwell's magnetic field are fused together, and the cogging effect and magnetic saturation effect are combined in the fusion process to establish the air gap magnetic field distribution model of the target motor.

[0007] The output results of the air gap magnetic field distribution model are verified using sample data. If the accuracy of the results reaches or exceeds the threshold during the verification process, the verification is completed, and the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor is established.

[0008] The air gap magnetic field distribution model is prompted to run a simulation based on the mapping relationship. During the simulation, a high-frequency signal of the preset frequency band is injected to output the simulated signal of the air gap magnetic field harmonics of the target motor after the high-frequency signal of the preset frequency band is injected.

[0009] Based on the simulated signal, the effect of high-frequency signal injection on the electromagnetic field of the target motor is determined.

[0010] Optionally, the method further includes: generating an optimal strategy for injecting a high-frequency signal based on the effect of the high-frequency signal injection on the electromagnetic field of the target motor, and determining a suitable high-frequency signal for injection into the target motor through the optimal strategy.

[0011] Optional, influencing parameters include at least one of the following: winding slotting parameters, short-pitch parameters, and air gap magnetic field distribution coefficient.

[0012] Optionally, the cogging effect refers to the pattern in which the equivalent air gap magnetic reluctance of the target motor changes due to the rotor teeth.

[0013] Optionally, the air gap magnetic field distribution of the target motor is determined based on Maxwell's spatial electromagnetic field analysis, including: establishing Maxwell's diffusion equations for the air gap magnetic field of the target motor, solving the Maxwell's diffusion equations using the variable separation method, and solving the spatial magnetic field vector using Bessel's equations for the solution of Maxwell's diffusion equations, so as to determine the air gap magnetic field distribution of the target motor.

[0014] Optionally, a mapping relationship is established between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor, including:

[0015] Determine the relationship between the harmonics of a single or multiple high-frequency signals injected and the harmonics of the air gap magnetic field of the target motor, so as to determine the influence of the harmonic amplitude characteristics of a single or multiple high-frequency signals on the frequency domain of the air gap magnetic field.

[0016] Based on the harmonic amplitude characteristics of a single high-frequency signal or multiple high-frequency signals, the influence of injecting a single high-frequency signal and multiple high-frequency signals on the frequency domain of the air gap magnetic field is determined, and the influence of injecting a single high-frequency signal and multiple high-frequency signals on the torque and iron loss of the target motor is determined.

[0017] The effects of injecting a single high-frequency signal and multiple high-frequency signals on the target motor torque and iron loss are analyzed.

[0018] Establish the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal to be injected and the equivalent air gap reluctance of the target motor.

[0019] Furthermore, this invention also proposes a system for determining the effect of high-frequency signal injection on the electromagnetic field of a motor, comprising:

[0020] The first model building unit establishes a spatial distribution model of magnetomotive force under three-phase sinusoidal alternating current excitation associated with the target motor based on the influence parameters of the air gap magnetic field harmonics affecting the target motor; it determines the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis; and it establishes a Maxwell magnetic field analytical model based on the determined air gap magnetic field distribution of the target motor.

[0021] The second model building unit integrates the magnetomotive force spatial distribution model and the Maxwell magnetic field analytical model, and combines the cogging effect and magnetic saturation effect during the integration process to establish the air gap magnetic field distribution model of the target motor.

[0022] The third calculation unit verifies the output results of the air gap magnetic field distribution model using sample data. If the accuracy of the results reaches or exceeds a threshold during the verification process, the verification is completed. A mapping relationship is established between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor. The air gap magnetic field distribution model is then prompted to simulate the operation based on the mapping relationship. During the simulation operation, a high-frequency signal of the preset frequency band is injected to output the simulated signal of the air gap magnetic field harmonics of the target motor after the high-frequency signal of the preset frequency band is injected. Based on the simulated signal, the influence of the high-frequency signal injection on the electromagnetic field of the target motor is determined.

[0023] Optionally, the third calculation unit is also used to: generate an optimal strategy for injecting high-frequency signals based on the influence of high-frequency signal injection on the electromagnetic field of the target motor, and determine a suitable high-frequency signal for injection into the target motor through the optimal strategy.

[0024] Optional, influencing parameters include at least one of the following: winding slotting parameters, short-pitch parameters, and air gap magnetic field distribution coefficient.

[0025] Optionally, the cogging effect refers to the pattern in which the equivalent air gap magnetic reluctance of the target motor changes due to the rotor teeth.

[0026] Optionally, the air gap magnetic field distribution of the target motor is determined based on Maxwell's spatial electromagnetic field analysis, including: establishing Maxwell's diffusion equations for the air gap magnetic field of the target motor, solving the Maxwell's diffusion equations using the variable separation method, and solving the spatial magnetic field vector using Bessel's equations for the solution of Maxwell's diffusion equations, so as to determine the air gap magnetic field distribution of the target motor.

[0027] Optionally, a mapping relationship is established between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor, including:

[0028] Determine the relationship between the harmonics of a single or multiple high-frequency signals injected and the harmonics of the air gap magnetic field of the target motor, so as to determine the influence of the harmonic amplitude characteristics of a single or multiple high-frequency signals on the frequency domain of the air gap magnetic field.

[0029] Based on the harmonic amplitude characteristics of a single high-frequency signal or multiple high-frequency signals, the influence of injecting a single high-frequency signal and multiple high-frequency signals on the frequency domain of the air gap magnetic field is determined, and the influence of injecting a single high-frequency signal and multiple high-frequency signals on the torque and iron loss of the target motor is determined.

[0030] The effects of injecting a single high-frequency signal and multiple high-frequency signals on the target motor torque and iron loss are analyzed.

[0031] Establish the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal to be injected and the equivalent air gap reluctance of the target motor.

[0032] In another aspect, the present invention also provides a computing device, comprising: one or more processors;

[0033] A processor is used to execute one or more programs;

[0034] When the one or more programs are executed by the one or more processors, the method described above is implemented.

[0035] In another aspect, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the method described above.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] This invention provides a method for determining the impact of high-frequency signal injection on the electromagnetic field of a motor, comprising: establishing a spatial distribution model of magnetomotive force under three-phase sinusoidal alternating current excitation associated with the target motor based on the influence parameters of the air gap magnetic field harmonics affecting the target motor; determining the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis; establishing a Maxwell magnetic field analytical model based on the determined air gap magnetic field distribution of the target motor; fusing the magnetomotive force spatial distribution model and the Maxwell magnetic field analytical model, and incorporating cogging effect and magnetic saturation effect during the fusion process to establish an air gap magnetic field distribution model of the target motor; verifying the output results of the air gap magnetic field distribution model using sample data; if the accuracy of the results reaches a threshold or above during the verification process, the verification is completed; establishing a mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor; simulating the air gap magnetic field distribution model based on the mapping relationship, and injecting a high-frequency signal of the preset frequency band during the simulation process to output a simulated signal of the air gap magnetic field harmonics of the target motor after the injection of the high-frequency signal of the preset frequency band; and determining the impact of high-frequency signal injection on the electromagnetic field of the target motor based on the simulated signal. This invention provides a theoretical basis for selecting high-frequency signals for motor injection. Attached Figure Description

[0038] Figure 1 This is a flowchart of the method of the present invention;

[0039] Figure 2 This is a schematic diagram of the method principle of the present invention;

[0040] Figure 3 This is a structural diagram of the system of the present invention. Detailed Implementation

[0041] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0042] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0043] Example 1:

[0044] This invention proposes a method for determining the effect of high-frequency signal injection on the electromagnetic field of a motor, such as... Figure 2 As shown, it includes:

[0045] Step 1: Based on the influence parameters of the air gap magnetic field harmonics affecting the target motor, establish a spatial distribution model of the magnetomotive force under three-phase sinusoidal AC excitation associated with the target motor.

[0046] Step 2: Determine the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis, and establish a Maxwell magnetic field analytical model based on the determined air gap magnetic field distribution of the target motor.

[0047] Step 3: The spatial distribution model of the magnetomotive force and the analytical model of Maxwell's magnetic field are fused together, and the cogging effect and magnetic saturation effect are combined in the fusion process to establish the air gap magnetic field distribution model of the target motor.

[0048] Step 4: Validate the output results of the air gap magnetic field distribution model using sample data. If the accuracy of the results reaches or exceeds the threshold during the validation process, the validation is complete. Establish the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor.

[0049] Step 5: Cause the air gap magnetic field distribution model to run a simulation based on the mapping relationship, and inject a high-frequency signal of the preset frequency band during the simulation to output the simulated signal of the air gap magnetic field harmonics of the target motor after the high-frequency signal of the preset frequency band is injected.

[0050] Step 6: Determine the effect of high-frequency signal injection on the electromagnetic field of the target motor based on the simulated signal.

[0051] The method further includes: generating an optimal strategy for injecting high-frequency signals based on the influence of high-frequency signal injection on the electromagnetic field of the target motor, and determining a suitable high-frequency signal for injection into the target motor through the optimal strategy.

[0052] Among them, the influencing parameters include at least one of the following: winding slotting parameters, short-pitch parameters, and air gap magnetic field distribution coefficient.

[0053] Among them, the cogging effect is the law by which the equivalent air gap magnetic reluctance of the target motor changes due to the rotor teeth.

[0054] The method for determining the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis includes: establishing Maxwell's diffusion equations for the air gap magnetic field of the target motor, solving the Maxwell's diffusion equations using the variable separation method, and solving the spatial magnetic field vector using Bessel's equations for the solution of Maxwell's diffusion equations, so as to determine the air gap magnetic field distribution of the target motor.

[0055] Among them, establishing the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor includes:

[0056] Determine the relationship between the harmonics of a single or multiple high-frequency signals injected and the harmonics of the air gap magnetic field of the target motor, so as to determine the influence of the harmonic amplitude characteristics of a single or multiple high-frequency signals on the frequency domain of the air gap magnetic field.

[0057] Based on the harmonic amplitude characteristics of a single high-frequency signal or multiple high-frequency signals, the influence of injecting a single high-frequency signal and multiple high-frequency signals on the frequency domain of the air gap magnetic field is determined, and the influence of injecting a single high-frequency signal and multiple high-frequency signals on the torque and iron loss of the target motor is determined.

[0058] The effects of injecting a single high-frequency signal and multiple high-frequency signals on the target motor torque and iron loss are analyzed.

[0059] Establish the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal to be injected and the equivalent air gap reluctance of the target motor.

[0060] The principle of this invention is as follows: Figure 2 As shown, it includes the following:

[0061] 1) A spatial distribution model of the magnetomotive force under three-phase sinusoidal alternating current excitation is established, considering the influence of winding slotting, short pitch, and distribution coefficient on harmonics; 2) The air gap magnetic field distribution is analyzed using Maxwell's spatial electromagnetic field theory: the Maxwell diffusion equations are solved using the variable separation method, and the spatial magnetic field vector is obtained through Bessel's equations to obtain the magnetic field distribution of the motor body; 3) To facilitate simulation and experimental verification, other parameters are further solved: the losses and output torque of each component are calculated using Boynting and energy conservation theories. In the analysis model, since the salient pole structure of the studied motor is not obvious and the time-varying equivalent air gap between the stator and rotor is not severe, each component is regarded as a coaxial hollow cylinder, simplifying the model construction difficulty. After the model is established, the cogging effect, i.e., the law of equivalent air gap reluctance changing with rotor teeth, is further considered.

[0062] However, the above model assumes that the magnetic field is unsaturated. After this step, it can be verified using the finite element method, taking care to set the BH curve of the silicon steel sheet to an ideal condition. However, when the motor power density increases or the injected high-frequency signal is significant, obvious magnetic saturation will occur at the tips of the stator and rotor salient pole teeth. Therefore, the Cater constant or magnetic circuit model is introduced to estimate the equivalent air gap length. The Cater constant is suitable for situations where the salient pole is not obvious or the magnetic flux density is not high. However, when the motor power density increases, or the injected signal is superimposed or has a significant amplitude, the strong tip magnetic saturation makes it unsuitable to use a constant for estimating the equivalent air gap. In this case, a magnetic circuit model is used, taking care to incorporate the time-varying additional reluctance generated by magnetic saturation into the reluctance element representing the salient pole tooth.

[0063] The magnetic saturation effect is incorporated into the electromagnetic field analysis model to analyze the air gap magnetic field under a given three-phase sinusoidal alternating current excitation.

[0064] After this step is completed, finite element verification can be performed: the BH curve of the ferromagnetic material in the established finite element model can be converted into actual data.

[0065] After the analysis model is verified, the mapping relationship between the amplitude-frequency characteristics of the injected harmonics and the equivalent air gap reluctance is established. This is divided into the following two steps: 1) Analyze the relationship between the injected single and multiple high-frequency harmonics and the air gap magnetic field harmonics, analyze the influence of the signal amplitude-frequency on the frequency domain analysis of the air gap magnetic field, and then qualitatively obtain the influence of the injected signal on torque and iron loss; 2) Study the relationship between the injected signal and the air gap harmonics. Specifically, one and multiple armature harmonic signals with different frequencies and amplitudes are injected sequentially under three-phase sinusoidal AC excitation. Then, the amplitude-frequency characteristics of the injected high-frequency signal that can reduce torque pulsation and iron loss are proposed, and the theoretical basis for the selection of high-frequency injected signals is obtained.

[0066] Example 2:

[0067] This invention also proposes a system 200 for determining the effect of high-frequency signal injection on the electromagnetic field of a motor, such as... Figure 3 As shown, it includes:

[0068] The first model building unit 201 establishes a spatial distribution model of magnetomotive force under three-phase sinusoidal alternating current excitation associated with the target motor based on the influence parameters of the air gap magnetic field harmonics affecting the target motor; it determines the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis; and it establishes a Maxwell magnetic field analytical model based on the determined air gap magnetic field distribution of the target motor.

[0069] The second model building unit 202 integrates the magnetomotive force spatial distribution model and the Maxwell magnetic field analytical model, and combines the cogging effect and magnetic saturation effect during the integration process to establish the air gap magnetic field distribution model of the target motor.

[0070] The third calculation unit 203 verifies the output results of the air gap magnetic field distribution model using sample data. If the accuracy of the results reaches or exceeds a threshold during the verification process, the verification is completed. A mapping relationship is established between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor. The air gap magnetic field distribution model is then prompted to simulate the operation based on the mapping relationship. During the simulation operation, a high-frequency signal of the preset frequency band is injected to output the simulated signal of the air gap magnetic field harmonics of the target motor after the high-frequency signal of the preset frequency band is injected. Based on the simulated signal, the influence of the high-frequency signal injection on the electromagnetic field of the target motor is determined.

[0071] The third calculation unit is also used to: generate an optimal strategy for injecting high-frequency signals based on the influence of high-frequency signal injection on the electromagnetic field of the target motor, and determine a suitable high-frequency signal for injection into the target motor through the optimal strategy.

[0072] Among them, the influencing parameters include at least one of the following: winding slotting parameters, short-pitch parameters, and air gap magnetic field distribution coefficient.

[0073] Among them, the cogging effect is the law by which the equivalent air gap magnetic reluctance of the target motor changes due to the rotor teeth.

[0074] The method for determining the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis includes: establishing Maxwell's diffusion equations for the air gap magnetic field of the target motor, solving the Maxwell's diffusion equations using the variable separation method, and solving the spatial magnetic field vector using Bessel's equations for the solution of Maxwell's diffusion equations, so as to determine the air gap magnetic field distribution of the target motor.

[0075] Among them, establishing the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor includes:

[0076] Determine the relationship between the harmonics of a single or multiple high-frequency signals injected and the harmonics of the air gap magnetic field of the target motor, so as to determine the influence of the harmonic amplitude characteristics of a single or multiple high-frequency signals on the frequency domain of the air gap magnetic field.

[0077] Based on the harmonic amplitude characteristics of a single high-frequency signal or multiple high-frequency signals, the influence of injecting a single high-frequency signal and multiple high-frequency signals on the frequency domain of the air gap magnetic field is determined, and the influence of injecting a single high-frequency signal and multiple high-frequency signals on the torque and iron loss of the target motor is determined.

[0078] The effects of injecting a single high-frequency signal and multiple high-frequency signals on the target motor torque and iron loss are analyzed.

[0079] Establish the mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal to be injected and the equivalent air gap reluctance of the target motor.

[0080] This invention provides a theoretical basis for selecting high-frequency signals for motor injection.

[0081] Example 3:

[0082] Based on the same inventive concept, this invention also provides a computer device, which includes a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to implement corresponding method flows or corresponding functions, thereby implementing the steps of the methods in the above embodiments.

[0083] Example 4:

[0084] Based on the same inventive concept, this invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the steps of the method in the above embodiments.

[0085] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0086] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0089] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0090] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method of determining the effect of high frequency signal injection on the electromagnetic field of an electrical machine, characterized in that, The method includes: Based on the influence parameters of the air gap magnetic field harmonics affecting the target motor, a spatial distribution model of the magnetomotive force under three-phase sinusoidal AC excitation associated with the target motor is established. The air gap magnetic field distribution of the target motor is determined based on Maxwell's spatial electromagnetic field analysis, and a Maxwell magnetic field analytical model is established based on the determined air gap magnetic field distribution of the target motor. The spatial distribution model of the magnetomotive force and the analytical model of Maxwell's magnetic field are fused together, and the cogging effect and magnetic saturation effect are combined in the fusion process to establish the air gap magnetic field distribution model of the target motor. The output results of the air gap magnetic field distribution model are verified using sample data. If the accuracy of the results reaches or exceeds the threshold during the verification process, the verification is completed. The mapping relationship between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor is established. The air gap magnetic field distribution model is prompted to run a simulation based on the mapping relationship. During the simulation, a high-frequency signal of a preset frequency band is injected to output the simulated signal of the air gap magnetic field harmonics of the target motor after the high-frequency signal of the preset frequency band is injected. Based on the simulated signal, the effect of high-frequency signal injection on the electromagnetic field of the target motor is determined.

2. The method of claim 1, wherein, The method further includes: generating an optimal strategy for injecting high-frequency signals based on the influence of high-frequency signal injection on the electromagnetic field of the target motor, and determining a suitable high-frequency signal for injection into the target motor through the optimal strategy.

3. The method of claim 1, wherein, The influencing parameters include at least one of the following: winding slotting parameters, short-pitch parameters, and air gap magnetic field distribution coefficient.

4. The method according to claim 1, characterized in that, The cogging effect refers to the change in the equivalent air gap magnetic reluctance of the target motor due to the rotor teeth.

5. A system for determining the effect of high-frequency signal injection on the electromagnetic field of a motor, characterized in that, The system includes: The first model building unit establishes a spatial distribution model of magnetomotive force under three-phase sinusoidal alternating current excitation associated with the target motor based on the influence parameters of the air gap magnetic field harmonics affecting the target motor; it determines the air gap magnetic field distribution of the target motor based on Maxwell's spatial electromagnetic field analysis; and it establishes a Maxwell magnetic field analytical model based on the determined air gap magnetic field distribution of the target motor. The second model building unit integrates the magnetomotive force spatial distribution model and the Maxwell magnetic field analytical model, and combines the cogging effect and magnetic saturation effect during the integration process to establish the air gap magnetic field distribution model of the target motor. The third calculation unit verifies the output results of the air gap magnetic field distribution model using sample data. If the accuracy of the results reaches or exceeds a threshold during the verification process, the verification is completed. A mapping relationship is established between the harmonic amplitude-frequency characteristics of the high-frequency signal and the equivalent air gap reluctance of the target motor. The air gap magnetic field distribution model is then used to simulate the operation based on the mapping relationship. During the simulation, a high-frequency signal of a preset frequency band is injected to output the simulated signal of the air gap magnetic field harmonics of the target motor after the high-frequency signal of the preset frequency band is injected. Based on the simulated signal, the influence of the high-frequency signal injection on the electromagnetic field of the target motor is determined.

6. The system of claim 5, wherein, The third calculation unit is also used to: generate an optimal strategy for injecting high-frequency signals based on the influence of high-frequency signal injection on the electromagnetic field of the target motor, and determine a suitable high-frequency signal for injection into the target motor through the optimal strategy.

7. The system of claim 5, wherein, The influencing parameters include at least one of the following: winding slotting parameters, short-pitch parameters, and air gap magnetic field distribution coefficient.

8. The system of claim 5, wherein, The cogging effect refers to the change in the equivalent air gap magnetic reluctance of the target motor due to the rotor teeth.

9. A computer device, comprising: include: One or more processors; A processor is used to execute one or more programs; When the one or more programs are executed by the one or more processors, the method described in any one of claims 1-4 is implemented.

10. A computer-readable storage medium, characterized in that, It contains a computer program, which, when executed, implements the method as described in any one of claims 1-4.

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