Electromagnetic interference motor drive inverter control method, system, and medium

Abstract

The application provides an electromagnetic interference motor drive frequency converter control method, system and medium, and relates to the field of motor control, wherein the method comprises the following steps: collecting electromagnetic interference signals in real time when a motor drive frequency converter is running, generating interference frequency spectrum data, dynamically adjusting switches of the frequency converter, and generating anti-interference modulation instructions; reconstructing pulse waveforms according to the anti-interference modulation instructions to perform harmonic compensation, performing feedback verification based on optimized driving signals, performing electromagnetic interference determination according to motor torque fluctuation values, and generating determination results; triggering parameter update instructions based on the determination results, driving the frequency converter to perform adaptive control through the parameter update instructions, and generating frequency conversion control results. The technical problem that the resistance of the existing frequency converter control method to electromagnetic interference is limited and the stability of motor operation is affected is solved. The technical effect of improving the electromagnetic interference suppression capability and guaranteeing the stable and reliable operation of the motor is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor control, in particular to an electromagnetic interference motor drive frequency converter control method, system and medium. BACKGROUND

[0002] As the key power source of various mechanical equipment, the stable and efficient operation of the motor plays a decisive role in ensuring the reliability of the entire production system and product quality. As a key device for regulating motor operation, motor drive frequency converter can flexibly change the motor speed and torque to meet different working condition requirements. However, with the increasing number of electronic equipment in industrial environment and the wide application of power electronic technology, electromagnetic interference problems are becoming increasingly prominent, which has become a key defect restricting the improvement of motor drive frequency converter control performance. At present, the frequency converter control method mainly focuses on the basic performance adjustment of the motor, and has limited resistance to electromagnetic interference, lacks adaptive adjustment mechanism, and is difficult to ensure stable operation of the motor in complex electromagnetic environment.

[0003] The prior art has a frequency converter control method, which has limited resistance to electromagnetic interference and affects the stability of the motor operation. SUMMARY

[0004] The present application provides an electromagnetic interference motor drive frequency converter control method, system and medium, which is used to solve the technical problem of the prior art that the frequency converter control method has limited resistance to electromagnetic interference and affects the stability of the motor operation.

[0005] In view of the above problems, the present application provides an electromagnetic interference motor drive frequency converter control method, system and medium.

[0006] In a first aspect of the present application, an electromagnetic interference motor drive frequency converter control method is provided, which comprises: collecting electromagnetic interference signals in real time when the motor drive frequency converter is running, generating interference spectrum data, dynamically adjusting the frequency converter, and generating anti-interference modulation instructions; reconstructing the pulse waveform according to the anti-interference modulation instructions for harmonic compensation, generating an optimized drive signal; based on the optimized drive signal, performing feedback verification to obtain a motor torque fluctuation value, performing electromagnetic interference judgment according to the motor torque fluctuation value, and generating a judgment result; triggering a parameter update instruction based on the judgment result, driving the frequency converter for adaptive control through the parameter update instruction, and generating a frequency conversion control result.

[0007] Preferably, the electromagnetic interference signal during the operation of the motor drive frequency converter is collected in real time, and the method comprises: collecting high-frequency current based on the DC bus end of the frequency converter to capture the common-mode interference current transient waveform; performing fast Fourier transform on the common-mode interference current based on the common-mode interference current transient waveform to extract the harmonic amplitude spectrum; collecting voltage based on the three-phase output end of the motor to obtain the differential-mode interference voltage fluctuation signal; identifying resonance according to the differential-mode interference voltage fluctuation signal to determine the resonance peak parameter; performing electromagnetic scanning on the surrounding area to construct the spatial radiation interference intensity distribution parameter; positioning the circuit based on the spatial radiation interference intensity distribution parameter to determine the radiation exceeding frequency point set; taking the resonance peak parameter as the boundary, and performing interference analysis on the harmonic amplitude spectrum according to the radiation exceeding frequency point set to construct the interference spectrum data.

[0008] Preferably, the interference spectrum data is used for dynamic switching adjustment of the frequency converter to generate an anti-interference modulation instruction, and the method comprises: setting a standard harmonic amplitude, comparing the harmonic amplitude spectrum with the standard harmonic amplitude by traversing the radiation exceeding frequency point set, generating a carrier frequency switching instruction when there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the radiation exceeding frequency point set; extracting the radiation exceeding area according to the carrier frequency switching instruction, dynamically adjusting the frequency converter according to the radiation exceeding area, and constructing a switching frequency strategy; extracting the common-mode interference current phase of the switching cycle based on the switching frequency strategy, performing anti-interference calculation according to the common-mode interference current phase, and constructing the anti-interference modulation instruction.

[0009] Preferably, when there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the radiation exceeding frequency point set, a carrier frequency switching instruction is generated, and the method comprises: when there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the radiation exceeding frequency point set, setting a first frequency band and a second frequency band based on the harmonic amplitude spectrum, and comparing the resonance peak parameter with the first frequency band and the second frequency band; when the resonance peak is located in the first frequency band, activating the adjustment module to increase the carrier frequency to generate a carrier frequency switching instruction; when the resonance peak is located in the second frequency band, activating the adjustment module to reduce the carrier frequency to generate a carrier frequency switching instruction.

[0010] Preferably, the method for reconstructing the pulse waveform according to the anti-interference modulation instruction to perform harmonic compensation and generating an optimized driving signal comprises the following steps: calling an original pulse waveform for decomposition to determine a rising edge interval, a conduction flat-top interval and a falling edge interval; performing analysis and screening based on the anti-interference modulation instruction to extract a slope control identifier; determining a waveform reconstruction mode according to the slope control identifier; when the slope control identifier is in an activated state, adjusting the waveform reconstruction mode to a stepped slope mode; when the waveform reconstruction mode is in the stepped slope mode, equally dividing the rising edge interval to obtain a plurality of target voltage stepped waveforms, injecting a negative compensation pulse into the falling edge interval to obtain a plurality of compensation amounts; and driving and integrating the plurality of target voltage stepped waveforms and the plurality of compensation amounts to generate the optimized driving signal; when the slope control identifier is in an inactivated state, adjusting the waveform reconstruction mode to a standard PWM mode; and when the waveform reconstruction mode is in the standard PWM mode, inserting a high-frequency tremor wave based on the conduction flat-top interval for adjustment to generate the optimized driving signal.

[0011] Preferably, the method for performing feedback verification based on the optimized driving signal to obtain a motor torque fluctuation value comprises the following steps: driving and verifying a motor based on the optimized driving signal to obtain a plurality of driving feedback verification results; performing motor fluctuation analysis according to the plurality of driving feedback verification results to obtain a fluctuation time domain feature; performing correlation matching based on the fluctuation time domain feature and an electromagnetic interference feature to generate a fluctuation-interference correlation coefficient; and performing torque calculation on the motor according to the fluctuation-interference correlation coefficient to obtain the motor torque fluctuation value.

[0012] Preferably, the method for performing electromagnetic interference determination according to the motor torque fluctuation value to generate a determination result comprises the following steps: determining a plurality of target interference types according to the fluctuation-interference correlation coefficient to determine a plurality of target interference types; performing interference verification by traversing the plurality of target interference types to obtain a plurality of interference identifiers; arranging the plurality of interference identifiers in descending order according to interference intensity to determine an interference sequence; performing electromagnetic determination on the motor according to the interference sequence to generate an electromagnetic interference parameter set; and adding the electromagnetic interference parameter set to the determination result.

[0013] Preferably, a parameter update instruction is triggered based on the determination result, adaptive control of the frequency converter is driven by the parameter update instruction, a frequency conversion control result is generated, and the method comprises: interference analysis based on the electromagnetic interference parameter set to generate a switching noise interference parameter, a dead zone effect interference parameter, and a common mode coupling interference parameter; a parameter update rule library is constructed, the switching noise interference parameter is used as an index to search the update rule library, a carrier frequency raising signal is activated, and a tremor wave injection instruction is generated; the dead zone effect interference parameter is used as an index to search the update rule library, a dead zone time reduction signal is activated, and a negative pulse addition instruction is generated; the common mode coupling interference parameter is used as an index to search the update rule library, a reverse voltage injection signal is activated, and a shielding enhancement instruction is generated; the tremor wave injection instruction, the negative pulse addition instruction, and the shielding enhancement instruction are loaded for parameter verification, and when the verification is passed, the parameter update instruction is triggered.

[0014] In a second aspect of the present application, an electromagnetic interference motor drive frequency converter control system is provided, comprising: a frequency converter adjustment module for real-time acquisition of electromagnetic interference signals during operation of a motor drive frequency converter, generation of interference frequency spectrum data for dynamic switching adjustment of the frequency converter, and generation of an anti-interference modulation instruction; a harmonic compensation module for reconstructing a pulse waveform according to the anti-interference modulation instruction for harmonic compensation and generation of an optimized drive signal; an interference determination module for feedback verification based on the optimized drive signal, obtaining of a motor torque fluctuation value, electromagnetic interference determination according to the motor torque fluctuation value, and generation of a determination result; and a frequency converter control module for triggering a parameter update instruction based on the determination result, adaptive control of the frequency converter by the parameter update instruction, and generation of a frequency conversion control result.

[0015] In a third aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program which, when executed, implements the steps of the electromagnetic interference motor drive frequency converter control method of any one of the first aspect.

[0016] One or more technical solutions provided in the present application have at least the following technical effects or advantages:

[0017] The method provided by the embodiment of the application generates interference spectrum data by collecting electromagnetic interference signals in real time when the motor drive frequency converter is running, performs dynamic switch adjustment on the frequency converter, generates anti-interference modulation instructions, reconstructs a pulse waveform according to the anti-interference modulation instructions to perform harmonic compensation, generates an optimized driving signal, performs feedback verification based on the optimized driving signal to obtain a motor torque fluctuation value, performs electromagnetic interference determination according to the motor torque fluctuation value to generate a determination result, triggers a parameter update instruction based on the determination result, and drives the frequency converter to perform adaptive control through the parameter update instruction to generate a frequency conversion control result. The technical effect of improving the electromagnetic interference suppression capability and ensuring the stable and reliable operation of the motor is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A flowchart of the electromagnetic interference motor drive frequency converter control method provided by the application is provided.

[0019] Figure 2 A structural diagram of the electromagnetic interference motor drive frequency converter control system provided by the application is provided.

[0020] The reference signs are explained as follows: a frequency converter adjustment module 11, a harmonic compensation module 12, an interference determination module 13, and a frequency converter control module 14. DETAILED DESCRIPTION

[0021] The application provides an electromagnetic interference motor drive frequency converter control method, system and medium, which is used to solve the technical problem that the resistance capability of the existing frequency converter control method to electromagnetic interference is limited and the stability of motor operation is affected. The technical effect of improving the electromagnetic interference suppression capability and ensuring the stable and reliable operation of the motor is achieved.

[0022] The technical solutions in the application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. It should be understood that the application is not limited to the example embodiments described herein. Based on the embodiments of the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application. In addition, it should be noted that, for convenience of description, only parts related to the application are shown in the drawings rather than all parts.

[0023] As shown in Embodiment One, Figure 1 The application provides an electromagnetic interference motor drive frequency converter control method, which comprises the following steps:

[0024] Real-time collection of electromagnetic interference signals when the motor drive frequency converter is running generates interference spectrum data for dynamic switch adjustment on the frequency converter to generate anti-interference modulation instructions.

[0025] Specifically, the frequency converter is a power control device for controlling an AC motor by changing the frequency of the power supply for the motor. First, the motor drive frequency converter is started to operate normally. High-precision electromagnetic interference signal acquisition equipment is used to collect electromagnetic interference signals generated during the operation of the motor drive frequency converter in real time. After collecting the electromagnetic interference signals, the time-domain electromagnetic interference signals are converted into frequency-domain interference spectrum data through signal processing algorithms, such as the Fast Fourier Transform (FFT) algorithm. The interference spectrum data is used to dynamically adjust the switching frequency strategy of the frequency converter. The switching frequency strategy refers to the control method of the turn-on and turn-off frequencies of power switching devices, such as IGBTs, in the frequency converter. After the dynamic adjustment of the switching frequency strategy is completed, anti-interference modulation instructions are generated.

[0026] Further, the electromagnetic interference signals during the operation of the motor drive frequency converter are collected in real time. The method includes: collecting high-frequency current based on the DC bus end of the frequency converter to capture common-mode interference current transient waveform; performing Fast Fourier Transform on the common-mode interference current based on the common-mode interference current transient waveform to extract harmonic amplitude spectrum; collecting voltage detection based on the three-phase output end of the motor to obtain differential-mode interference voltage fluctuation signal; identifying resonance according to the differential-mode interference voltage fluctuation signal to determine resonance peak parameters; performing electromagnetic scanning on the surrounding area to construct spatial radiation interference intensity distribution parameters; performing circuit positioning based on the spatial radiation interference intensity distribution parameters to determine the radiation exceeding frequency point set; taking the resonance peak parameters as the boundary, and performing interference analysis on the harmonic amplitude spectrum according to the radiation exceeding frequency point set to construct interference spectrum data.

[0027] Specifically, during normal operation of the frequency converter, a high-frequency current sensor located at the DC bus terminal collects the current flowing between the DC bus terminal and ground in real time, obtaining the transient waveform of the common-mode interference current (CMID) as a function of time. The common-mode interference current refers to the current flowing between the DC bus terminal and ground, which can adversely affect the motor drive system, such as causing insulation aging and generating additional noise. Then, a Fast Fourier Transform (FFT) is performed on the collected CID transient waveform to convert the time-domain signal into a frequency-domain representation, thereby extracting the harmonic amplitude spectrum. The harmonic amplitude spectrum refers to the distribution of the interference current amplitude at different frequencies within the common-mode interference current. Based on the harmonic amplitude spectrum, the energy distribution of the common-mode interference current at different frequencies can be clearly understood, identifying which frequency bands have more severe harmonic interference. Simultaneously, a high-precision voltage detection device, such as a voltage probe or voltage sensor, is installed at the three-phase output terminals of the motor. By connecting the voltage detection device to the three-phase output terminals of the motor, voltage changes are monitored in real time, acquiring the differential-mode interference voltage fluctuation signal. The differential-mode interference voltage fluctuation signal reflects the high-frequency fluctuation characteristics of the voltage between phases. Resonance identification is performed on the differential-mode interference voltage fluctuation signal. A bandpass filter is used to suppress low-frequency power frequency components and high-frequency noise, retaining target frequency band signals that may exhibit resonance characteristics. Spectral analysis is performed on the filtered differential-mode interference voltage fluctuation signal, using algorithms such as Fast Fourier Transform or Wavelet Transform to extract frequency components and calculate the amplitude at each frequency point. Peak positions with sudden amplitude increases significantly higher than surrounding frequency points are detected in the amplitude spectrum. The peak frequency, amplitude, and bandwidth of these peak positions are used as resonance spike parameters, where the peak frequency corresponds to the resonance center frequency, the amplitude reflects the resonance intensity, and the bandwidth characterizes the resonance energy distribution range.

[0028] The electromagnetic interference generated by the motor drive frequency converter in operation not only propagates through conduction, but also spreads to the surrounding space in the form of electromagnetic radiation. A comprehensive measurement is performed on the frequency converter and the surrounding area of the motor by using a spatial electromagnetic scanning device, such as an electromagnetic radiation tester. Based on the parameter data obtained by the measurement, a spatial radiation interference intensity distribution parameter is constructed, which refers to the distribution of electromagnetic radiation in space at different directions and distances. Through analysis of the spatial radiation interference intensity distribution parameter, combined with the circuit structure and layout of the frequency converter and the motor, electromagnetic compatibility analysis techniques such as near-field to far-field transformation and circuit simulation are used to locate the circuit part that generates excessive radiation, determine the excessive radiation frequency point set, and the excessive radiation frequency point set refers to the frequency point set whose actual electromagnetic radiation intensity exceeds the electromagnetic compatibility standard limit value. Finally, the resonance peak parameter is used as the boundary condition for spectral analysis, and the amplitudes corresponding to the excessive radiation frequency point set in the harmonic amplitude spectrum are compared and analyzed. The resonance peak parameter and the excessive radiation frequency point set define the key characteristics of the interference from the aspects of conduction and resonance, spatial radiation. With the resonance peak parameter as the boundary, the frequency range that may cause resonance can be focused on. According to the harmonic amplitude spectrum analysis of the excessive radiation frequency point set, the frequency band with serious radiation interference to the surrounding environment can be focused on. Through comprehensive analysis of the harmonic amplitude spectrum in these two dimensions, comprehensive and accurate interference spectrum data is obtained, which includes the harmonic amplitude of common-mode interference at different frequencies, the peak frequency and amplitude of differential-mode interference induced resonance, and the interference intensity corresponding to the excessive radiation frequency point, etc., which comprehensively reflects the interference characteristics of the frequency converter in the running state, provides high-precision data support for subsequent dynamic switching frequency adjustment and anti-interference modulation strategy generation based on interference characteristics, and helps to improve the electromagnetic compatibility of the motor drive frequency converter and ensure its stable and reliable operation.

[0029] Further, the generated interference spectrum data is used for dynamic switching adjustment of the frequency converter, and an anti-interference modulation instruction is generated. The method comprises: setting a standard harmonic amplitude, comparing the harmonic amplitude spectrum with the standard harmonic amplitude by traversing the excessive radiation frequency point set, generating a carrier frequency switching instruction when there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the excessive radiation frequency point set; extracting the excessive radiation region according to the carrier frequency switching instruction, dynamically adjusting the frequency converter according to the excessive radiation region, and constructing a switching frequency strategy; extracting the common-mode interference current phase of the switching cycle based on the switching frequency strategy, performing anti-interference calculation according to the common-mode interference current phase, and constructing the anti-interference modulation instruction.

[0030] Specifically, according to the industry standard, the equipment performance requirement, the electromagnetic compatibility level and the actual operation environment, the standard harmonic amplitude is set to measure whether the electromagnetic interference of the frequency converter is within the threshold range. For example, in an industrial scene with extremely high electromagnetic compatibility requirements, the standard harmonic amplitude is set relatively low to ensure that the surrounding electronic equipment is not disturbed. Then, the harmonic amplitudes corresponding to each frequency point in the set of frequency points exceeding the radiation standard are compared one by one with the standard harmonic amplitude. When there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the set of frequency points exceeding the radiation standard, it indicates that the electromagnetic interference generated by the frequency converter at these frequency points exceeds the allowed range, and then the carrier frequency switching instruction is immediately generated. The carrier frequency is a parameter of the frequency converter when controlling the motor to run, which affects the output waveform and electromagnetic interference characteristics of the frequency converter. By switching the carrier frequency through the carrier frequency switching instruction, the frequency distribution of the electromagnetic interference is adjusted. For example, switching the carrier frequency from a lower value to a higher value will cause some harmonic components to move to higher frequencies, avoiding some frequency bands sensitive to surrounding equipment. Further, according to the carrier frequency switching instruction, the radiation exceeding region is extracted, and the frequency converter is dynamically adjusted according to the current electromagnetic interference of the radiation exceeding region, and a switching frequency strategy is constructed, which is a specific rule and method for dynamically adjusting the switching frequency of the frequency converter to reduce electromagnetic interference and ensure normal operation of the motor. Through a reasonable switching frequency strategy, electromagnetic interference can be effectively reduced while ensuring normal operation of the motor. Finally, based on the switching frequency strategy, a high-precision current sensor is used to collect current signals within the switching period of the frequency converter in real time, the current signals contain common-mode interference current components, the current signals are converted into digital signals through a high-speed data acquisition card, the digital signals are segmented according to the time nodes set by the switching frequency strategy, the signal characteristics of each segment are extracted, and phase calculation algorithms such as Fourier transform or zero-crossing detection are used to analyze and process the segmented signals to obtain the phase information of the common-mode interference current in the switching period. The phase of the common-mode interference current reflects the phase change of the common-mode interference current in the switching period, and through anti-interference calculation based on the phase of the common-mode interference current, the amplitude and phase relationship of each frequency component of the interference current is determined through Fourier analysis, and then a compensation current signal with the same amplitude and opposite phase as the interference current phase is generated according to the amplitude and phase relationship of each frequency component of the interference current. The compensation current signal is converted into a format compatible with the frequency converter control signal through a modulation algorithm such as PWM modulation to construct an anti-interference modulation instruction for controlling the switching action of the frequency converter to offset or weaken the electromagnetic interference. By accurately analyzing the interference spectrum data, dynamically adjusting the switching parameters of the frequency converter, and generating targeted anti-interference modulation instructions, the electromagnetic interference generated by the frequency converter during operation can be effectively reduced, the electromagnetic compatibility can be improved, and the frequency converter and related equipment can be ensured to operate stably and reliably in the electromagnetic environment.

[0031] Further, when the harmonic amplitude spectrum of the radiation exceeding the standard frequency point set has a harmonic amplitude exceeding the standard harmonic amplitude, a carrier frequency switching instruction is generated. The method comprises: when the harmonic amplitude spectrum of the radiation exceeding the standard frequency point set has a harmonic amplitude exceeding the standard harmonic amplitude, setting a first frequency band and a second frequency band based on the harmonic amplitude spectrum, and comparing the resonance peak parameter with the first frequency band and the second frequency band; when the resonance peak is located in the first frequency band, activating the adjustment module to increase the carrier frequency and generating a carrier frequency switching instruction; and when the resonance peak is located in the second frequency band, activating the adjustment module to decrease the carrier frequency and generating a carrier frequency switching instruction.

[0032] Specifically, when the comparison determines that the harmonic amplitude spectrum of the radiation exceeding the standard frequency point set has a harmonic amplitude exceeding the standard harmonic amplitude, it indicates that the electromagnetic interference generated by the current operation of the frequency converter has exceeded the allowed range. At this time, the harmonic amplitude spectrum is divided into a first frequency band and a second frequency band, wherein the frequency band division principle is pre-set according to factors such as the working characteristics of the frequency converter, motor parameters, and electromagnetic compatibility standards. For example, the harmonic amplitude spectrum is divided according to the commonly used carrier frequency range of the frequency converter and the resonance characteristics of the motor winding, the first frequency band corresponds to the high frequency region, and the second frequency band corresponds to the low frequency region. The resonance peak parameter is compared with the first frequency band and the second frequency band. Through the comparison, the frequency range where the resonance peak is located can be accurately determined. When the resonance peak is located in the first frequency band, it indicates that the interference is concentrated in the high frequency region, the adjustment module is activated to increase the carrier frequency, and a carrier frequency switching instruction is generated. By increasing the carrier frequency, the modulation energy is pushed to a higher frequency domain, avoiding high frequency sensitive points, and dispersing harmonic energy at the same time. When the resonance peak is located in the second frequency band, it indicates that the low frequency band interference is significant, the adjustment module is activated to decrease the carrier frequency, and a carrier frequency switching instruction is generated. By decreasing the carrier frequency, the low frequency harmonic amplitude can be reduced, and the interference on low frequency sensitive equipment and the conduction path can be weakened. By using frequency band division and resonance peak positioning, the interference frequency concentration area can be quickly identified and responded to, so that the carrier frequency can be adjusted in a targeted manner while maintaining the stability of the operation of the frequency converter, thereby effectively avoiding the radiation exceeding the standard frequency point, effectively reducing the electromagnetic interference generated by the operation of the frequency converter, and improving the electromagnetic compatibility of the entire motor drive.

[0033] According to the anti-interference modulation instruction, the pulse waveform is reconstructed for harmonic compensation, and an optimized driving signal is generated.

[0034] Further, according to the anti-interference modulation instruction, the pulse waveform is reconstructed for harmonic compensation, and an optimized driving signal is generated. The method comprises the following steps: the original pulse waveform is called and decomposed to determine the rising edge interval, the conduction flat-top interval and the falling edge interval; the anti-interference modulation instruction is analyzed and screened based on the anti-interference modulation instruction to extract a slope control identifier; the waveform reconstruction mode is determined according to the slope control identifier; when the slope control identifier is in an activated state, the waveform reconstruction mode is adjusted to a stepped slope mode; when the waveform reconstruction mode is in the stepped slope mode, the rising edge interval is equally divided to obtain a plurality of target voltage stepped waveforms, and a plurality of compensation amounts are obtained by injecting negative compensation pulses into the falling edge interval; the plurality of target voltage stepped waveforms and the plurality of compensation amounts are integrated to generate the optimized driving signal; when the slope control identifier is in an inactivated state, the waveform reconstruction mode is adjusted to a standard PWM mode; and when the waveform reconstruction mode is in the standard PWM mode, high-frequency tremor waves are inserted into the conduction flat-top interval for adjustment to generate the optimized driving signal.

[0035] Specifically, the original pulse waveform is obtained by directly connecting the motor driving circuit related nodes through an oscilloscope or calling the original pulse waveform from the data record of the frequency converter control system. The original pulse waveform refers to the initial pulse shape electrical signal waveform generated by the frequency converter without any anti-interference modulation processing, which reflects the switching characteristics and current-voltage change law of the frequency converter in the basic running state. After obtaining the original pulse waveform, the original pulse waveform is decomposed, that is, the voltage change trend of the original pulse waveform in a switching cycle is identified to determine the rising edge interval, the conduction flat-top interval and the falling edge interval. Optionally, the time period in which the voltage changes rapidly from low voltage to high voltage is identified as the rising edge interval by threshold judgment method or edge detection algorithm, and the continuous time period in which the voltage is stable at the target amplitude and the change rate is close to zero is defined as the conduction flat-top interval. Finally, the process from the starting point of the voltage rapidly decreasing from high voltage to low voltage to falling back to low voltage is detected as the falling edge interval. The anti-interference modulation instruction is field-analyzed and parameter-mapped to extract the slope control identifier according to the pre-defined data structure and coding rule. The pre-defined data structure and coding rule pre-define the meaning represented by each bit or byte segment in the anti-interference modulation instruction, which includes the position information of the slope control identifier. The slope control identifier is a binary state flag parameter. The data in the position of the slope control identifier is analyzed to determine whether it is in an activated state or an inactivated state, wherein the activated state is represented by binary value 1, and the inactivated state is represented by 0.

[0036] Further, the waveform reconstruction mode is determined according to the slope control identifier: when the slope control identifier is 1, that is, in the active state, the waveform reconstruction mode is adjusted to the stepped ramp mode. The stepped ramp mode is a pulse waveform adjustment mode. The rising edge interval is evenly divided. The number of partitions is determined according to actual requirements and device performance. For example, the interval is evenly divided into 4 parts, and a plurality of target voltage step waveforms are obtained. The plurality of target voltage step waveforms can make the voltage rising process more gentle and reduce the high-frequency harmonic interference caused by voltage mutation. At the same time, a negative compensation pulse is injected into the falling edge interval. The amplitude and frequency of the negative compensation pulse are determined according to the harmonic analysis result, and a plurality of compensation amounts are obtained. The negative compensation pulse functions to offset the harmonic components in the original falling edge waveform, further reducing the harmonic content. Finally, the plurality of target voltage step waveforms and the plurality of compensation amounts are driven and integrated to generate an optimized driving signal. For example, the rising edge is evenly divided into N=4 subintervals, and the target voltage step waveforms are V1, V2, V3, and V4, corresponding to the time durations Δt1, Δt2, Δt3, and Δt4. The compensation amounts C1, C2, C3, and C4 obtained by anti-interference calculation are distributed into sub-windows aligned with the common-mode current phase. Then, the plurality of target voltage step waveforms and the plurality of compensation amounts are driven and integrated. The integration process is first time-aligned, and then amplitude-constrained. The amplitude / voltage slope dv / dt of Vi and Ci is limited and saturated to ensure that it does not overpressure or overcurrent. Subsequently, volt-second balance is performed to generate an optimized driving signal.

[0037] When the slope control identifier is 0, that is, in the inactive state, the waveform reconstruction mode is adjusted to the standard PWM mode. The standard PWM mode refers to a pulse width modulation mode in which a fixed carrier frequency and a modulation ratio are used to generate a duty cycle that continuously changes, the rising edge and the falling edge maintain the original slope, and no step segmentation or additional compensation pulse injection is performed. When the waveform reconstruction mode is in the standard PWM mode, high-frequency tremor waves are inserted into the conduction flat-top interval for adjustment. The high-frequency tremor wave is a pulse signal with a high frequency and a small amplitude. By inserting the high-frequency tremor wave, the fixed frequency distribution of the harmonics can be disrupted, and the harmonic energy can be dispersed to a wider frequency band, thereby reducing the harmonic amplitude at a specific frequency point and achieving harmonic compensation. Finally, an optimized driving signal is generated.

[0038] By accurately analyzing and flexibly reconstructing the original pulse waveform and using different modes and strategies for processing, the performance of the motor drive system is effectively improved, the influence of electromagnetic interference on the equipment is reduced, and the stable and reliable operation of the entire electrical equipment is ensured.

[0039] Based on the optimized driving signal, a feedback verification is performed to obtain a motor torque fluctuation value. Electromagnetic interference is determined according to the motor torque fluctuation value, and a determination result is generated.

[0040] Specifically, the motor is driven by an optimized driving signal, and a plurality of driving feedback verification results are formed by collecting transient data such as torque, speed and current in real time through a plurality of high-precision sensor groups. Then, the plurality of driving feedback verification results are verified to obtain the motor torque fluctuation value. According to the fluctuation and interference correlation coefficient of the motor torque fluctuation value, the type and intensity of the current electromagnetic interference are determined, and a determination result containing the interference type label, intensity level and frequency band positioning information is generated.

[0041] Further, the feedback verification is performed based on the optimized driving signal to obtain the motor torque fluctuation value, and the method comprises: driving verification of the motor based on the optimized driving signal to obtain a plurality of driving feedback verification results; motor fluctuation analysis according to the plurality of driving feedback verification results to obtain fluctuation time domain characteristics; correlation matching based on the fluctuation time domain characteristics and electromagnetic interference characteristics to generate a fluctuation-interference correlation coefficient; torque calculation of the motor according to the fluctuation-interference correlation coefficient to obtain the motor torque fluctuation value.

[0042] Specifically, the generated optimized drive signal is input to the motor driver, and the motor driver drives the motor to operate according to the instructions of the optimized drive signal. During the operation of the motor, various high-precision sensors are used to collect torque, speed, current and other data in real time, and a plurality of drive feedback verification results reflecting the actual operating state of the motor are obtained. The high-precision sensors include but are not limited to torque sensors, current sensors, speed sensors and position sensors. After obtaining the plurality of drive feedback verification results, the motor fluctuation analysis is performed on the plurality of drive feedback verification results by using a signal processing algorithm such as a Fourier transform algorithm, the fluctuation of the motor operating parameters in the time domain is generated, the fluctuation time domain characteristics are obtained, and the fluctuation time domain characteristics include the amplitude, frequency and phase of the fluctuation. The electromagnetic interference characteristic refers to a characteristic parameter set including the interference frequency band, amplitude mode and the influence law of the motor torque under different interference types and intensities, which is established by experiment or simulation in advance. The fluctuation time domain characteristics and the electromagnetic interference characteristics are associated and matched, and a correlation analysis algorithm such as Pearson correlation coefficient and Spearman correlation coefficient is used to calculate the correlation coefficient between the fluctuation time domain characteristics and the electromagnetic interference characteristics, so as to obtain the associated matching result and generate the fluctuation-interference correlation coefficient. The fluctuation-interference correlation coefficient describes the correlation degree between the motor torque fluctuation and the electromagnetic interference, and the larger the coefficient value is, the closer the correlation between them is. Finally, according to the generated fluctuation-interference correlation coefficient, the real-time collected motor current, voltage and other operating parameters are combined, and the motor electromagnetic model or torque analytical formula is used for motor torque calculation to obtain the motor torque fluctuation value. The motor torque fluctuation value reflects the stability of the motor torque under the action of the optimized drive signal. By accurately obtaining the motor torque fluctuation value, potential problems existing in the operation of the motor can be found in time, and based on the correlation analysis of the torque fluctuation value and the electromagnetic interference, the electromagnetic interference of the motor can be predicted in advance, and corresponding measures can be taken to prevent the electromagnetic interference, thereby improving the stability and reliability of the entire device.

[0043] Further, the motor torque fluctuation value is used for electromagnetic interference judgment to generate a judgment result, and the method comprises: determining the electromagnetic interference type according to the fluctuation-interference correlation coefficient to determine a plurality of target interference types; performing interference verification by traversing the plurality of target interference types to obtain a plurality of interference identifiers; arranging the plurality of interference identifiers in descending order according to the interference intensity to determine an interference sequence; performing electromagnetic judgment on the motor according to the interference sequence to generate an electromagnetic interference parameter set, and adding the electromagnetic interference parameter set to the judgment result.

[0044] Specifically, the fluctuation-interference correlation coefficient calculated in real time is compared with the correlation threshold of each interference type in the electromagnetic interference characteristics. When the fluctuation-interference correlation coefficient of the interference type is greater than the preset threshold, it is considered that the interference mode has a significant matching relationship under the current working condition, and it is determined as an effective interference type. Based on this, a plurality of target interference types are determined, including conducted interference, radiated interference, harmonic interference, etc. Then, the interference verification is performed on the plurality of target interference types one by one. By comparing the real-time running data with the characteristic mode of the target interference, it is confirmed whether it actually exists, and a corresponding interference identifier is generated for each interference type. The interference identifier refers to the existence of the interference and the preliminary strength evaluation result. After obtaining a plurality of interference identifiers, the interference strength values corresponding to the plurality of interference identifiers are arranged in descending order to form an interference sequence, and the primary and secondary orders of the interference types and the priority processing objects are determined. Then, the electromagnetic determination is performed on the motor according to the interference sequence, and the verification results and strength evaluation of each interference are combined to generate an electromagnetic interference parameter set containing information such as interference type, strength level, and interference duration. The electromagnetic interference parameter set is added to the determination result to form a complete electromagnetic interference determination result. By accurately determining the electromagnetic interference types and strength that may exist in the motor and generating detailed determination results, the problems existing in the electromagnetic compatibility of the motor can be found in time, and the pertinence and efficiency of interference suppression are improved.

[0045] The parameter update instruction is triggered based on the determination result, and the frequency converter is driven to perform adaptive control through the parameter update instruction to generate a variable frequency control result.

[0046] Specifically, the parameter update instruction is triggered according to the determination result, and the parameter update instruction contains an adjustment scheme for the variable frequency converter control parameters, such as frequency set value, voltage adjustment amplitude, torque compensation coefficient, etc. The variable frequency converter is driven to perform adaptive control through the parameter update instruction to dynamically adjust the output frequency and voltage. For example, if the determination result shows that there is harmonic interference, the parameter update instruction will adjust the modulation mode of the output waveform to reduce the harmonic component, and if there is conducted interference, the phase relationship between the output voltage and frequency will be adjusted to reduce the conducted interference. By driving the variable frequency converter to perform adaptive control, a variable frequency control result is generated, which effectively suppresses the influence of electromagnetic interference on the motor and surrounding equipment, and improves the stability and reliability of the motor operation.

[0047] Further, based on the determination result, a parameter update instruction is triggered, and the frequency converter is driven to perform adaptive control through the parameter update instruction to generate a variable frequency control result. The method comprises: performing interference analysis based on the electromagnetic interference parameter set to generate a switching noise interference parameter, a dead-time effect interference parameter, and a common-mode coupling interference parameter; constructing a parameter update rule library, taking the switching noise interference parameter as an index to search the update rule library, activating a carrier frequency raising signal, and generating a tremor wave injection instruction; taking the dead-time effect interference parameter as an index to search the update rule library, activating a dead-time reduction signal, and generating a negative pulse addition instruction; taking the common-mode coupling interference parameter as an index to search the update rule library, activating a reverse voltage injection signal, and generating a shielding enhancement instruction; and loading the tremor wave injection instruction, the negative pulse addition instruction, and the shielding enhancement instruction for parameter verification, and when the verification is passed, triggering the parameter update instruction.

[0048] Specifically, through an interference analysis algorithm, such as generating a time-frequency spectrogram using a CVAE network, the electromagnetic interference parameter set is analyzed by combining an LSTM classification network to generate a switching noise interference parameter, a dead-time effect interference parameter, and a common-mode coupling interference parameter. The switching noise interference parameter refers to the noise characteristics generated by the frequent on-off of the switching device in the motor control circuit; the dead-time effect interference parameter refers to the interference caused by the dead-time set in the frequency converter control to prevent the upper and lower bridge arms from being short-circuited, and the dead-time is a time interval during which neither the upper bridge arm nor the lower bridge arm is conducting to avoid the simultaneous conduction of the switching devices of the upper and lower bridge arms in the frequency converter control; and the common-mode coupling interference parameter refers to the related characteristics of the common-mode interference existing in the motor system.

[0049] A parameter updating rule library is established through a large amount of experimental data and theoretical analysis, and the parameter updating rule library includes a mapping relationship between different types of electromagnetic interference parameters and corresponding parameter updating strategies. For example, for switch noise interference, the parameter updating rule library records how to adjust the carrier frequency of the frequency converter to reduce the influence of noise under different switch noise intensities. For dead-time effect interference, it records how to adjust the dead-time to optimize motor control under different dead-time effect degrees. For common-mode coupling interference, it records the corresponding reverse voltage injection strategy to suppress common-mode interference. Then, each type of interference parameter generated is used as an index to search the parameter updating rule library. Specifically, the switch noise interference parameter is used as an index to search the parameter updating rule library, a carrier frequency raising signal is activated according to the switch noise interference parameter, a tremor wave injection instruction is generated, the tremor wave injection instruction is a control instruction for injecting a tremor wave with a specific frequency and amplitude into the output signal of the frequency converter, which can improve the current distribution of the motor winding and reduce electromagnetic interference caused by switch noise. When the dead-time effect interference parameter is used as an index to search the parameter updating rule library, a dead-time reduction signal is activated, and by reducing the dead-time, the control accuracy of the frequency converter can be improved, and the influence of the dead-time effect on the motor torque and efficiency can be reduced, and then a negative pulse addition instruction is generated, the negative pulse addition instruction is an instruction for adding a negative pulse to the frequency converter control signal, which is used to compensate for current overshoot and other problems that may occur after the dead-time is reduced, and ensure the stability of motor control. When the common-mode coupling interference parameter is used as an index to search the parameter updating rule library, a reverse voltage injection signal is activated. Through the reverse voltage injection signal, the voltage generated by the common-mode interference can be offset, thereby suppressing the common-mode coupling interference, and a shielding enhancement instruction is generated, the shielding enhancement instruction is an instruction for enhancing the shielding capability of the frequency converter and the motor against common-mode interference, for example, adjusting the grounding mode of the shielding layer or increasing the thickness of the shielding material. Then, the tremor wave injection instruction, the negative pulse addition instruction, and the shielding enhancement instruction are loaded for parameter verification. A simulation model of the motor control system is established by using computer software, the generated tremor wave injection instruction, negative pulse addition instruction, and shielding enhancement instruction are input into the simulation model, the running state and performance indicators of the motor control system are observed, and the effectiveness and rationality of the multiple instructions are verified. Only when the parameter verification is passed, the parameter updating instruction is triggered to drive the frequency converter to perform adaptive control, thereby ensuring the accuracy and safety of parameter updating, effectively suppressing electromagnetic interference, and improving the stability and reliability of motor operation.

[0050] In the second embodiment, based on the same inventive concept as the electromagnetic interference motor drive frequency converter control method in the foregoing embodiments, as shown in Figure 2 The electromagnetic interference motor drive frequency converter control system provided by the present application includes:

[0051] The inverter adjustment module 11 is used to collect electromagnetic interference signals during the operation of the motor-driven inverter in real time, generate interference spectrum data to dynamically adjust the inverter, and generate anti-interference modulation commands. The harmonic compensation module 12 is used to reconstruct the pulse waveform according to the anti-interference modulation commands to perform harmonic compensation and generate optimized drive signals. The interference judgment module 13 is used to perform feedback verification based on the optimized drive signals to obtain motor torque fluctuation values, perform electromagnetic interference judgment according to the motor torque fluctuation values, and generate judgment results. The inverter control module 14 is used to trigger parameter update commands based on the judgment results, drive the inverter to perform adaptive control through the parameter update commands, and generate inverter control results.

[0052] Furthermore, the inverter adjustment module 11 in the electromagnetic interference motor drive inverter control system is also used for: high-frequency current sensing acquisition based on the inverter's DC bus terminal to capture the transient waveform of the common-mode interference current; performing a fast Fourier transform on the common-mode interference current based on the transient waveform of the common-mode interference current to extract the harmonic amplitude spectrum; voltage detection acquisition based on the motor's three-phase output terminal to obtain the differential-mode interference voltage fluctuation signal; resonance identification according to the differential-mode interference voltage fluctuation signal to determine the resonance peak parameter; electromagnetic scanning of the surrounding area to construct spatial radiation interference intensity distribution parameters; circuit positioning based on the spatial radiation interference intensity distribution parameters to determine the radiation exceeding frequency point set; using the resonance peak parameter as the boundary, performing interference analysis on the harmonic amplitude spectrum according to the radiation exceeding frequency point set to construct interference spectrum data.

[0053] Furthermore, the inverter adjustment module 11 in the electromagnetic interference motor drive inverter control system is also used for: setting a standard harmonic amplitude, traversing the radiation exceeding frequency point set and comparing the harmonic amplitude spectrum with the standard harmonic amplitude; when there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the radiation exceeding frequency point set, generating a carrier frequency switching command; extracting the radiation exceeding region according to the carrier frequency switching command, dynamically adjusting the inverter according to the radiation exceeding region, and constructing a switching frequency strategy; extracting the common-mode interference current phase of the switching cycle based on the switching frequency strategy, performing anti-interference calculation according to the common-mode interference current phase, and constructing the anti-interference modulation command.

[0054] Further, the variable frequency converter adjustment module 11 in the electromagnetic interference motor drive variable frequency converter control system is further used for: when there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the radiation exceeding frequency point set, setting a first frequency band and a second frequency band based on the harmonic amplitude spectrum, comparing the resonance peak parameter with the first frequency band and the second frequency band; when the resonance peak is located in the first frequency band, activating the adjustment module to increase the carrier frequency and generating a carrier frequency switching instruction; when the resonance peak is located in the second frequency band, activating the adjustment module to reduce the carrier frequency and generating a carrier frequency switching instruction.

[0055] Further, the harmonic compensation module 12 in the electromagnetic interference motor drive variable frequency converter control system is further used for: decomposing the original pulse waveform to determine a rising edge interval, a conduction flat-top interval, and a falling edge interval; based on the anti-interference modulation instruction, performing analysis and screening, extracting a slope control identifier, and determining a waveform reconstruction mode according to the slope control identifier: when the slope control identifier is in an activated state, adjusting the waveform reconstruction mode to a ladder slope mode; when the waveform reconstruction mode is in the ladder slope mode, equally dividing the rising edge interval to obtain a plurality of target voltage ladder waveforms, injecting a negative compensation pulse into the falling edge interval to obtain a plurality of compensation amounts; driving and integrating the plurality of target voltage ladder waveforms and the plurality of compensation amounts to generate the optimized drive signal; when the slope control identifier is in an inactivated state, adjusting the waveform reconstruction mode to a standard PWM mode; when the waveform reconstruction mode is in the standard PWM mode, adjusting based on the conduction flat-top interval to insert a high-frequency tremor wave to generate the optimized drive signal.

[0056] Further, the interference determination module 13 in the electromagnetic interference motor drive variable frequency converter control system is further used for: driving and verifying the motor based on the optimized drive signal to obtain a plurality of drive feedback verification results; performing motor fluctuation analysis according to the plurality of drive feedback verification results to obtain fluctuation time domain characteristics; based on the fluctuation time domain characteristics and electromagnetic interference characteristics, generating a fluctuation-interference correlation coefficient; and according to the fluctuation-interference correlation coefficient, calculating the torque of the motor to obtain the motor torque fluctuation value.

[0057] Further, the interference determination module 13 in the electromagnetic interference motor drive frequency converter control system is further configured to determine the type of electromagnetic interference according to the fluctuation-interference correlation coefficient, determine a plurality of target interference types; perform interference verification on the plurality of target interference types to obtain a plurality of interference identifiers; arrange the plurality of interference identifiers in descending order of interference intensity to determine an interference sequence; perform electromagnetic determination on the motor according to the interference sequence to generate a set of electromagnetic interference parameters, and add the set of electromagnetic interference parameters to the determination result.

[0058] Further, the frequency converter control module 14 in the electromagnetic interference motor drive frequency converter control system is further configured to perform interference analysis based on the set of electromagnetic interference parameters to generate a switching noise interference parameter, a dead zone effect interference parameter, and a common mode coupling interference parameter; construct a parameter update rule library, use the switching noise interference parameter as an index to search the update rule library, activate a carrier frequency raising signal, and generate a tremor wave injection instruction; use the dead zone effect interference parameter as an index to search the update rule library, activate a dead zone time reduction signal, and generate a negative pulse addition instruction; use the common mode coupling interference parameter as an index to search the update rule library, activate a reverse voltage injection signal, and generate a shielding enhancement instruction; load the tremor wave injection instruction, the negative pulse addition instruction, and the shielding enhancement instruction for parameter verification, and when the verification is passed, trigger the parameter update instruction.

[0059] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The electromagnetic interference motor drive frequency converter control method and specific examples in the first embodiment are also applicable to the electromagnetic interference motor drive frequency converter control system of the present embodiment. Through the detailed description of the electromagnetic interference motor drive frequency converter control method, those skilled in the art can clearly understand the electromagnetic interference motor drive frequency converter control system in the present embodiment. Therefore, for the sake of brevity of the specification, the details are not described here.

[0060] Embodiment three, based on the electromagnetic interference motor drive frequency converter control method in the foregoing embodiments, the same inventive concept is provided. The computer readable storage medium stores a computer program, and the computer program implements the steps of the electromagnetic interference motor drive frequency converter control method in any one of the above embodiments when executed.

[0061] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0062] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the application and its equivalents, the application can be practiced otherwise than as specifically described.

[0063] Any of the methods or steps described above can be stored as computer instructions or programs in various types of computer memories, recognized by various types of computer processors, and implemented accordingly.

[0064] Based upon the above specific embodiments of the present application, any improvements and modifications made by those skilled in the art to the present application without departing from the principles of the present application shall fall within the scope of the patent protection of the present application.

Claims

1. A method for controlling an electromagnetic interference-driven motor frequency converter, characterized in that, The method includes: The electromagnetic interference signal during the operation of the motor drive frequency converter is collected in real time, and interference spectrum data is generated to dynamically adjust the frequency converter and generate anti-interference modulation command. The interference spectrum data includes the harmonic amplitude of common mode interference at different frequencies, the peak frequency and amplitude of resonance caused by differential mode interference, and the interference intensity parameters corresponding to the radiation exceeding the standard frequency. Based on the anti-interference modulation command, the pulse waveform is reconstructed for harmonic compensation to generate an optimized drive signal; Based on the optimized drive signal, the motor drive is verified to obtain multiple drive feedback verification results; Motor fluctuation analysis is performed based on the multiple drive feedback verification results to obtain the time-domain characteristics of the fluctuation. Based on the correlation matching between the wave time-domain characteristics and the electromagnetic interference characteristics, a wave-interference correlation coefficient is generated; The electromagnetic interference type is determined based on the wave-interference correlation coefficient, and multiple target interference types are identified. The multiple target interference types are traversed to perform interference verification and obtain multiple interference identifiers; The plurality of interference identifiers are arranged in descending order of interference intensity to determine the interference sequence; The motor is electromagnetically determined according to the interference sequence, an electromagnetic interference parameter set is generated, and the electromagnetic interference parameter set is added to the determination result. Based on the judgment result, a parameter update command is triggered, and the frequency converter is driven to perform adaptive control through the parameter update command to generate frequency conversion control results.

2. The electromagnetic interference motor drive frequency converter control method as described in claim 1, characterized in that, The method for real-time acquisition of electromagnetic interference signals during the operation of a motor drive frequency converter includes: High-frequency current sensing is performed on the DC bus of the frequency converter to capture the transient waveform of common-mode interference current. Based on the transient waveform of the common-mode interference current, a fast Fourier transform is performed on the common-mode interference current to extract the harmonic amplitude spectrum; Voltage detection and acquisition are performed at the three-phase output terminal of the motor to obtain differential mode interference voltage fluctuation signals; Resonance identification is performed based on the differential mode interference voltage fluctuation signal to determine the resonance peak parameters; Electromagnetic scanning of the surrounding area was conducted to construct spatial radiation interference intensity distribution parameters. Circuit location is performed based on the spatial radiation interference intensity distribution parameters to determine the set of radiation exceeding the standard frequency points; Using the resonant peak parameters as boundaries, interference analysis is performed on the harmonic amplitude spectrum according to the radiation exceedance frequency point set to construct interference spectrum data.

3. The electromagnetic interference motor drive frequency converter control method as described in claim 2, characterized in that, The method for generating interference spectrum data to dynamically adjust the inverter's switching and generating anti-interference modulation commands includes: A standard harmonic amplitude is set, and the harmonic amplitude spectrum is compared with the standard harmonic amplitude by traversing the set of frequency points exceeding the standard radiation frequency point set. When there is a harmonic amplitude exceeding the standard harmonic amplitude in the harmonic amplitude spectrum of the set of frequency points exceeding the standard radiation frequency point set, a carrier frequency switching command is generated. The radiation exceeding the standard area is extracted according to the carrier frequency switching command, and the frequency converter is dynamically adjusted according to the radiation exceeding the standard area to construct a switching frequency strategy; Based on the switching frequency strategy, the phase of the common-mode interference current during the switching cycle is extracted, and anti-interference calculation is performed according to the phase of the common-mode interference current to construct the anti-interference modulation command.

4. The electromagnetic interference motor drive frequency converter control method as described in claim 3, characterized in that, When the harmonic amplitude spectrum of the radiation exceeding the standard frequency point set contains a harmonic amplitude exceeding the standard harmonic amplitude, a carrier frequency switching command is generated, the method including: When the harmonic amplitude spectrum of the radiation exceeding the standard frequency point set contains a harmonic amplitude exceeding the standard harmonic amplitude, a first frequency band and a second frequency band are set based on the harmonic amplitude spectrum, and the resonant peak parameter is compared with the first frequency band and the second frequency band; When the resonant peak is located in the first frequency band, the adjustment module is activated to boost the carrier frequency and generate a carrier frequency switching command. When the resonant peak is located in the second frequency band, the activation adjustment module reduces the carrier frequency and generates a carrier frequency switching command.

5. The electromagnetic interference motor drive frequency converter control method as described in claim 1, characterized in that, The method includes reconstructing the pulse waveform according to the anti-interference modulation command, performing harmonic compensation, and generating an optimized drive signal, comprising: The original pulse waveform is retrieved and decomposed to determine the rising edge interval, the conduction flat-top interval, and the falling edge interval. Based on the anti-interference modulation command, the waveform reconstruction mode is determined by parsing and filtering, extracting the ramp control identifier, and then determining the waveform reconstruction mode based on the ramp control identifier. When the ramp control identifier is active, the waveform reconstruction mode is adjusted to the stepped ramp mode; When the waveform reconstruction mode is in the stepped ramp mode, the rising edge interval is divided equally to obtain multiple target voltage stepped waveforms, and a negative compensation pulse is injected into the falling edge interval to obtain multiple compensation amounts. The multiple target voltage step waveforms and the multiple compensation quantities are driven and integrated to generate the optimized drive signal; When the ramp control identifier is inactive, the waveform reconstruction mode is adjusted to the standard PWM mode; When the waveform reconstruction mode is in the standard PWM mode, the optimized drive signal is generated by adjusting the high-frequency jitter wave inserted based on the conduction flat-top interval.

6. The electromagnetic interference motor drive frequency converter control method as described in claim 1, characterized in that, Based on the determination result, a parameter update command is triggered, and the frequency converter is driven to perform adaptive control through the parameter update command to generate a frequency conversion control result. The method includes: Based on the electromagnetic interference parameter set, interference analysis is performed to generate switching noise interference parameters, dead zone effect interference parameters, and common mode coupling interference parameters. A parameter update rule base is constructed, and the switching noise interference parameter is used as an index to search the update rule base. The carrier frequency boosting signal is activated, and a flutter wave injection command is generated. The dead-zone effect interference parameter is used as an index to search the updated rule base, the dead-zone time reduction signal is activated, and a negative pulse appending instruction is generated. The common-mode coupling interference parameters are used as an index to search the updated rule base, activate the reverse voltage injection signal, and generate a shielding enhancement command. The vibration wave injection command, the negative pulse append command, and the shielding enhancement command are loaded and the parameters are verified. When the verification is successful, the parameter update command is triggered.

7. An electromagnetic interference motor drive frequency converter control system, characterized in that, The steps for implementing the electromagnetic interference motor drive frequency converter control method according to any one of claims 1 to 6 include: The inverter adjustment module (11) is used to collect electromagnetic interference signals during the operation of the motor drive inverter in real time, generate interference spectrum data to dynamically switch the inverter, and generate anti-interference modulation commands. The harmonic compensation module (12) is used to reconstruct the pulse waveform according to the anti-interference modulation command to perform harmonic compensation and generate an optimized driving signal; Interference determination module (13) is used to perform feedback verification based on the optimized driving signal; The interference determination module is used to perform drive verification on the motor based on the optimized drive signal to obtain multiple drive feedback verification results; perform motor fluctuation analysis based on the multiple drive feedback verification results to obtain fluctuation time-domain characteristics; perform correlation matching between the fluctuation time-domain characteristics and electromagnetic interference characteristics to generate a fluctuation-interference correlation coefficient; determine the electromagnetic interference type based on the fluctuation-interference correlation coefficient to identify multiple target interference types; traverse the multiple target interference types to perform interference verification to obtain multiple interference identifiers; sort the multiple interference identifiers in descending order of interference intensity to determine an interference sequence; perform electromagnetic determination on the motor according to the interference sequence to generate an electromagnetic interference parameter set; and add the electromagnetic interference parameter set to the determination result. The frequency converter control module (14) is used to trigger a parameter update command based on the judgment result, drive the frequency converter to perform adaptive control through the parameter update command, and generate frequency conversion control result.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed, implements the steps of the electromagnetic interference motor drive frequency converter control method according to any one of claims 1 to 6.

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