234 results about "Motor noise" patented technology

The embodiment of the invention relates to the technical field of fans, and particularly discloses an active noise reduction fan which comprises a shell which is a portable shell, a cavity is formed in the shell, and an air inlet and an air outlet which are communicated with each other are formed in the two ends of the shell respectively; the fan assembly is arranged in the cavity and used for rotating to generate wind pressure so that air can be sucked in from the air inlet, passes through the cavity and then is blown out from the air outlet; the noise reduction assembly is arranged in the cavity and used for collecting noise signals inside and outside the cavity in real time when the fan assembly operates and sending out noise reduction signals according to the noise signals; wherein the noise reduction signal is a dynamic comprehensive noise signal including air inlet noise, air outlet noise, fan blade noise and / or motor noise. Through reasonable design of functions of the noise reduction assembly, active noise control is performed on the noise signal by using the noise reduction signal, and the noise level during operation of the fan is reduced.

The invention discloses a motor abnormal sound detection method and system based on contact acquisition and small sample learning, and the method comprises the steps: directly coupling a motor housing through a contact vibration sensor, collecting an original vibration signal, and generating an anti-interference vibration signal; inputting the anti-interference vibration signal into a nonlinear resonance enhancement module to generate an enhanced sound signal; performing wavelet packet decomposition on the enhanced sound signal, extracting a multi-scale frequency band energy entropy, and generating a motor abnormal sound feature matrix by combining singular value decomposition dimension reduction; on the basis of a dynamic weight distribution element learning algorithm, a small number of normal samples and abnormal samples are utilized to construct an abnormal sound classification model; and inputting the motor abnormal sound characteristic matrix into an abnormal sound classification model, detecting transient abnormality through a sliding window time sequence matching algorithm, and outputting an abnormal sound judgment result. According to the embodiment of the invention, high-precision and low-false-alarm motor abnormal sound detection under complex working conditions can be realized.

The invention discloses a stator assembly, a motor and a household appliance, and relates to the technical field of motors. The stator assembly comprises a stator iron core and a plastic coating part, the stator iron core is coated with the plastic coating part, the plastic coating part is provided with a spigot boss on the end face of the opening part, and the spigot boss is matched with the end cover in an abutting mode. The height of the stator core is h0, the distance between the first end face of the opening part and the second end face of the stator core is h, when h0 is larger than or equal to 20 mm, h = h0 * 0.5 + S1, and S1 is larger than or equal to 6 mm and smaller than or equal to 10 mm. When h0 is smaller than 20 mm, h = h0 * 0.65 + S2, and S2 is larger than or equal to 5 mm and smaller than or equal to 8 mm. The value of h is designed according to the calculation result of the formula, so that the relationship between the material consumption of the plastic coating part and the noise of the motor can be balanced, the noise of the motor meets the requirement, the material consumption of the plastic coating part can be in a proper range, and the production cost is reduced.

The invention discloses a rotor punching sheet, a motor, a compressor and refrigeration equipment, the rotor punching sheet comprises a punching sheet body, the end face of the punching sheet body is provided with a plurality of structure groups, each structure group comprises a first magnetic isolation groove, a magnetic isolation bridge and a mounting groove, the mounting groove is internally provided with a permanent magnet, and the length of the permanent magnet is w1; a mounting groove is formed in the punching sheet body, a first magnetic isolation groove is formed between each of two ends of the mounting groove and the outer peripheral surface of the punching sheet body, so that a magnetic isolation bridge is formed between each first magnetic isolation groove and the outer peripheral surface of the punching sheet body, the length of the magnetic isolation bridge is w2, and the relation range of w1 and w2 is that w2 / w1 is greater than or equal to 0.3 and less than or equal to 0.6. According to the technical scheme, on the premise that the mechanical structure strength of the rotor is guaranteed, the optimal pole-arc coefficient of the motor can be achieved, the no-load back electromotive force harmonic distortion rate, the cogging torque and the torque pulsation of the motor are reduced, the noise vibration of the motor is reduced, and the magnetic leakage is reduced, so that the performance of the motor is improved.

The invention discloses a fault prediction method and system based on motor noise, and the method comprises the steps: 1, defining a sampling time length, obtaining the noise in the sampling time length, and carrying out the framing operation to generate a noise frame sequence; 2, extracting spectrum feature data of each frame of noise in the noise frame sequence to generate a noise feature sequence; 3, inputting the noise feature sequence into a self-attention neural network model, and outputting a noise representation sequence by the self-attention neural network model; 4, acquiring a set composed of samples of the standard fault noise of the motor, generating a feature vector of each sample, performing cross attention mechanism calculation with the noise representation sequence, and generating a judgment representation of a fault corresponding to each sample; and 5, inputting the judgment representation of the fault corresponding to each sample into the feedforward neural network model to generate the judgment probability of each fault, thereby realizing accurate judgment of the working state of the motor, and simultaneously judging multiple fault types under the condition of not increasing the calculation amount.

The utility model discloses a vibrating water pump, and belongs to the technical field of water pumps. The technical problems that an existing water pump is large in size, complex in structure and large in motor operation noise are solved. According to the technical scheme, the water purifier is characterized by comprising a shell, a one-way valve, a vibrator, a diaphragm and a rigid support, the vibrator is installed on the diaphragm to provide diaphragm vibration energy, the diaphragm is fixed in the shell through the rigid support and divides the shell into a water inlet area and a water outlet area, and the one-way valve is further fixed to the rigid support; the one-way valve is communicated with the water inlet area and the water outlet area and keeps water flowing into the water outlet area from the water inlet area in a one-way mode. The water purifier has the advantages of being long in service life, easy to overhaul, adjustable in power and convenient to use.

The invention discloses a motor noise detection method and system based on waveform analysis, and relates to the related field of motor fault diagnosis, and the method comprises the steps: carrying out the time domain collection of an original noise signal during the operation of a motor, obtaining an original waveform signal, carrying out the Fourier transform of the original waveform signal, extracting the spectrum characteristics, and obtaining the spectrum energy distribution; performing threshold segmentation on the frequency spectrum energy distribution, screening out motors which meet a preset quality standard but have preset abnormal indications, and obtaining critical qualified motors; extracting an original waveform signal of the critically qualified motor, and extracting a transient impact component from the original waveform signal to obtain a transient feature; and matching the transient feature with an early fault mode in a pre-constructed fault feature library, and outputting a potential fault detection result. The technical problem that the current qualified motor with potential faults cannot be identified in the existing motor noise detection is solved, and the technical effect of accurately identifying the qualified motor with the potential faults is achieved.

The invention discloses a frequency converter, a current sampling circuit thereof and a three-phase current sampling method of a motor, the frequency converter is suitable for driving the motor in a compressor, and the current sampling circuit comprises a single-resistance sampling unit configured to perform current sampling at a voltage effective vector moment so as to obtain three-phase current of the motor; the multi-resistance sampling unit is configured to perform current sampling at a voltage zero vector moment so as to obtain three-phase current of the motor; and the switching control unit is configured to acquire parameters of the motor, determine a switching index according to the parameters of the motor, and select one of the single-resistor sampling unit and the multi-resistor sampling unit to perform current sampling based on the switching index. The current sampling circuit can solve the problems that the noise of the motor is large due to single-resistor sampling and the performance of the motor is reduced due to multi-resistor sampling, so that the performance of the motor is improved.

The invention discloses a stator assembly, a motor and a household appliance, and relates to the technical field of motors. The stator assembly comprises a stator iron core and a plastic coating part, the stator iron core is coated with the plastic coating part, and the plastic coating part is provided with a spigot boss on the end face of the opening part. The height of the stator core is h0, the distance between the first end face of the opening part and the second end face of the stator core is h, when h0 is larger than or equal to 20 mm, h = h0 * 0.85 + S1, and S3 is larger than or equal to 3 mm and smaller than or equal to 5 mm. When h0 is smaller than 20 mm, h = h0 + S2, and S2 is larger than or equal to 3 mm and smaller than or equal to 5 mm. Under the condition that the axial size of the motor is not changed, the axial size is substituted into a corresponding formula to calculate the distance h from the first end face to the second end face, the strength and rigidity of the rear end of the plastic coating part are increased, the noise of the motor meets the requirement, meanwhile, the material consumption of the plastic coating part is within a proper range, the production cost is reduced, and the production efficiency is improved. And the relationship between the material consumption of the plastic coating part and the motor noise can be balanced.

The invention discloses a high-precision identification method and system for a noise source of an asynchronous motor, and relates to the technical field of asynchronous motor detection, and the method comprises the following steps: constructing a finite element model of a to-be-analyzed asynchronous motor, dividing the surface into a plurality of detection sub-regions, and carrying out the operation simulation of the finite element motor, analyzing vibration speed and sound pressure signal data of each sub-region, synchronously acquiring actual signals, calculating relative differences with simulation data, evaluating detection priorities by combining historical fault times, forming a detection sequence according to the priorities, and sequentially performing sound-vibration coherence analysis and coherence function calculation to obtain a sound-vibration coherence detection result; according to the method, noise frequency bands are classified into structural noise and air noise, order tracking analysis is performed on the structural noise obtained through classification, an amplitude stability index and an amplitude change gradient are calculated, automatic classification and identification of electromagnetic noise and mechanical noise are realized based on a preset threshold value, and the efficiency and accuracy of fault processing are remarkably improved.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, the number of poles of a rotor is 2P, the number of stator slots is Q, the longest distance between the slot bottom of a first magnetic adjusting slot and the circle center of a stator punching sheet is Ls, and the minimum inner diameter of the stator punching sheet is Di, the included angle between the connecting line of the point A and the circle center of the stator punching sheet and the center line in the length direction of the stator tooth is alpha, the two farthest end points of the tooth boot part along the circumferential direction of the stator punching sheet are respectively a point B and a point C, the included angle between the connecting line of the point B and the circle center of the stator punching sheet and the connecting line of the point C and the circle center of the stator punching sheet is beta, 0 degree < = 1.27 degrees, and 0 mm < = 0.2 mm. According to the technical scheme provided by the invention, the torque ripple of the motor is reduced, the noise of the motor is reduced, and the energy efficiency of the motor is improved.

The utility model relates to the technical field of motor noise detection, specifically provides a motor noise detection simulation load device and a motor noise detection device, and aims to solve the problem of inaccurate motor noise detection data in the prior art. In order to achieve the purpose, the motor noise detection simulation load device comprises a shell, a driving shaft, a transmission mechanism and a pressure adjusting mechanism, the driving shaft is rotatably arranged on the shell, one end of the driving shaft is connected with the driving end of the motor, the other end of the driving shaft is connected with the transmission mechanism, and the transmission mechanism is arranged in the shell; the pressure adjusting mechanism is arranged to be capable of making contact with the transmission mechanism and adjusting the acting force between the pressure adjusting mechanism and the transmission mechanism. According to the utility model, the actual load-carrying state of the motor can be simulated, no extra noise is generated like a fan, and the accuracy of motor noise detection is improved.

The application relates to the technical field of motor noise reduction, in particular to a motor noise reduction method for a portable fan. The handheld fan is internally provided with a driving motor. The method comprises the following steps: obtaining motor noise generated by the portable fan during operation; the motor noise comprises mechanical vibration noise, electromagnetic noise and aerodynamic noise of the driving motor; when the signal strength of the motor noise is greater than a preset strength threshold, generating a noise control instruction based on the motor noise; generating and emitting noise reduction signals for the mechanical vibration noise, the electromagnetic noise and the aerodynamic noise based on the noise control instruction, so as to perform destructive interference on the motor noise. The motor operation noise level is reduced through active noise reduction and accurate processing of the fan motor noise.

The present disclosure relates to the field of noise reduction technologies, and specifically a motor noise control method and apparatus, a computer device and a storage medium are provided. The method includes: determining a current driving mode of a vehicle and a total torque required by the vehicle in the current driving mode; acquiring an electric drive noise distribution matrix of the vehicle in the current driving mode, where the electric drive noise distribution matrix includes correspondences among target motor noises, target motor speeds, and target motor torques of respective motors in the current driving mode; and distributing a torque of each motor according to the electric drive noise distribution matrix, where a sum of torques of the respective motors is equal to the total torque required by the vehicle.

The utility model discloses an outer rotor permanent magnet synchronous motor, which comprises a rotor component arranged in a motor shell, a stator component arranged in the rotor component, and a heat dissipation and noise reduction structure arranged on the stator component, the first bearing is arranged on one side of the outer rotor casing, and the plurality of permanent magnets are arranged in the outer rotor casing; the stator punching sheet group is arranged in the inner stator rack; the second bearing is arranged on one side of the stator punching sheet group; the plurality of stator teeth are arranged on the outer ring of the stator core, the stator accommodating grooves are arranged between the adjacent stator teeth, and the excitation windings are arranged in the stator accommodating grooves; in the heat dissipation and noise reduction structure, the heat dissipation part is arranged on the stator teeth, and the noise reduction part is arranged at one end of the stator teeth; the heat dissipation part comprises a first heat dissipation hole, a second heat dissipation hole and a third heat dissipation hole which are arranged on the stator teeth. According to the utility model, the heat radiation area of the stator surface can be effectively increased, convection heat radiation efficiency can be enhanced, stator temperature rise can be reduced, noise generation and transmission can be effectively weakened, and motor noise can be reduced.

The invention relates to the technical field of propulsion motor noise control, in particular to a propulsion motor noise control method based on short-time Fourier transform, and the method comprises the following steps: S1, collecting a vibration signal during the operation of a ship propulsion motor through a sensor, and obtaining a signal sequence; s2, converting the signal sequence into a time-frequency two-dimensional signal sequence by adopting short-time Fourier transform; and S3, obtaining an output signal by processing the time-frequency two-dimensional signal sequence. The propulsion motor noise control method based on short-time Fourier transform can continuously monitor the noise level of the motor during the operation period through combining the advantages of the sum, and quickly adjust the control strategy according to real-time feedback, thereby achieving the purpose of automatically regulating and controlling the noise, effectively reducing the operation noise of the motor, facilitating the reduction of the structural fatigue, and improving the reliability of the propulsion motor. The service life of equipment is prolonged, so that the long-term maintenance cost is reduced.

The invention relates to a wiper structure capable of reducing wind resistance lifting force, and belongs to the technical field of wipers, the wiper structure comprises a wiper and a wiper arm, the wiper arm comprises a wiper rod and a connecting piece on one side of the wiper rod, and the connecting piece is provided with a second windward side and a third windward side. According to analysis and verification, the pressure coefficient of an original windscreen wiper is designed to be 17n / m, after the wind lifting force is reduced through a new structure, the downward pressure of the windscreen wiper can be designed to be about 12N / m, the pressure of the windscreen wiper is greatly reduced, and therefore the purposes of reducing the sound generated when the windscreen wiper is used for brushing glass and reducing the noise generated when the windscreen wiper is used for brushing the glass are achieved. And meanwhile, the downward pressure of the wiper arm is small, the load of the wiper motor is reduced, so that the noise of the wiper motor is reduced, the size and the power of the motor can be reduced by reducing the load of the motor, the power consumption of the wiper can also be reduced, and the effects of energy conservation and emission reduction are achieved.

A built-in tangential mixed magnetic steel magnetism gathering type permanent magnet rotor relates to the technical field of motors, the rotor comprises a rotor iron core and a rotating shaft, the rotor iron core is provided with a plurality of permanent magnet units which are symmetrically arranged around the axis of the rotor iron core, and the permanent magnet rotor is characterized in that each permanent magnet unit comprises a middle magnetic steel, middle air permanent magnet grooves and radial magnetic steel are arranged between the adjacent permanent magnet units, the middle air permanent magnet grooves and the radial magnetic steel are arranged on the q shaft, the middle air permanent magnet grooves are arranged on the inner sides of the radial magnetic steel, and the middle magnetic steel and the adjacent radial magnetic steel on the two sides of the middle magnetic steel are arranged in a U shape. The rotor provided by the utility model can reduce motor noise and torque ripple.

The invention relates to a low-wind-noise wind wheel structure, a fan assembly and a dehumidifier, a wind wheel comprises a support, the support comprises a hub, a mounting part and a flow guide part connected between the hub and the mounting part, the flow guide part and the mounting part are both located on the air inlet side of the wind wheel, the flow guide part is in a hollow circular truncated cone shape, and a containing cavity for at least containing part of a motor is defined by the flow guide part; the mounting part is used for mounting a driving shaft of the motor; and the inner ends of the blades are connected to the circumferential outer surface of the hub. According to the low-wind-noise wind wheel structure, the fan assembly and the dehumidifier, the flow guide part with the specific through-flow opening is arranged in the wind wheel, airflow organization in the wind wheel is optimized, airflow is more regular and smoother when entering the containing cavity and acting with the blades, and pneumatic noise is effectively reduced while the air volume is increased; meanwhile, the motor can be partially wrapped by the containing cavity formed by the flow guide part, and leakage of noise of the motor is reduced.

The invention relates to the technical field of foaming materials, in particular to a polyurethane foaming material for motor noise reduction and a preparation method thereof.The preparation method comprises the steps that part of an amine catalyst and polyol mixture, a foaming agent, a metal catalyst, a surfactant, expanded graphite, an anti-aging agent and the like are mixed, and a first component is obtained; isocyanate and the first component are subjected to high-pressure mixing according to a preset proportion, and a mixed system is obtained; and injecting the mixed system into a mold, carrying out gradient foaming to obtain a foaming body, carrying out surface hot pressing twice, and carrying out product curing and cutting to obtain a finished product of the motor wrapping part. The polyurethane foam material provided by the invention simultaneously meets the requirements of medium-high frequency sound absorption, vibration damping and oil stain protection.

The invention discloses a roller shutter equipment, a motor and a brake device, The brake device is used for braking motor rotor. The brake device includes a permanent magnet and a magnetic conductor, one of the permanent magnet and the magnetic conductor is used for connecting the motor rotor and the other one is used for connecting the motor stator. The permanent magnet includes N magnetic poles, the magnetic conductor includes N slots, the brake device constitutes a N poles N slots structure, where N is an integer greater than 1. The brake device is applied to motor and roller shutter equipment, it realizes rapid braking, at the same time it can effectively reduce the vibration frequency of the motor and avoid the vibration frequency of the cover shell of the roller shutter equipment. It avoids resonance, ensures normal operation of the motor and reduces motor noise during operation.

The utility model relates to the technical field of motor middle plates, in particular to a grounding middle plate with a novel structure, which comprises a middle plate frame, a power connection terminal mounting rack and a power connection terminal slot, the outer end of the middle plate frame is provided with a grounding terminal mounting rack, the inner side of the grounding terminal mounting rack is provided with a grounding terminal slot, and the grounding terminal slot is provided with a grounding terminal. An alignment column is arranged at the position, close to the power connection terminal installation frame, of the upper side of the middle plate frame, an alignment hole is formed in the outer side of the middle plate frame, a middle plate hole is formed in the upper side of the middle plate frame, and an elastic arm installation groove is formed in the position, close to the power connection terminal installation frame, of the inner side of the middle plate hole. And a grounding terminal main body is mounted in the grounding terminal slot. According to the utility model, the grounding terminal main body is mounted through the grounding terminal mounting rack and is used for connecting the grounding wire, so that the connection of the grounding wire is firmer, the convenience of the connection of the grounding wire is improved, the grounding effect is improved, the motor can better prevent external electronic interference, and the noise of the motor can be reduced under the condition of reducing the interference.

The present invention discloses a noise reduction control method and system for a permanent magnet synchronous motor based on wide-spectrum high-frequency injection, which belongs to the field of motor control technology. The existing sensorless control scheme based on high-frequency injection in the zero-low speed domain has the problem of large noise. The present invention is based on a noise reduction control method for a permanent magnet synchronous motor based on wide-spectrum high-frequency injection. By constructing a signal acquisition model, an amplitude dynamic processing model, a signal frequency domain processing model, and a rotor position calculation model, the audio signal is adaptively compressed and processed, and the amplitude of the audio signal is reduced while retaining the main audio characteristics, thereby obtaining a wide-spectrum high-frequency injection signal that can reduce motor noise; then, based on the Hilbert transform mechanism, the wide-spectrum high-frequency injection signal is frequency-domain transformed to obtain a mixed signal; and then the mixed signal is processed to obtain rotor position information, thereby effectively solving the noise problem caused by the high-frequency injection current and effectively improving the estimation accuracy of the rotor position.

The invention discloses an electromagnetic noise suppression method, which comprises the following steps: S1, designing an asymmetric magnetic pole winding: the pole-arc coefficient is the ratio of the magnetic pole arc length to the pole distance, the pole-arc coefficient of odd teeth is 1.2, the pole-arc coefficient of even teeth is 1.0, the symmetry of a magnetic field is broken through asymmetric magnetic field distribution, and low-order harmonics in cogging torque pulsation are suppressed; s2, winding optimization of the winding: adopting a distributed winding technology, adopting a precise winding process with the error of the number of conductors in each groove being less than or equal to + / -2%, and reducing the content of higher harmonics by adjusting the pitch and the distribution mode of the winding (adopting a short-pitch winding or a fractional-slot winding); and S3, designing a nanocrystalline alloy shielding layer: additionally arranging the nanocrystalline alloy shielding layer with the thickness of 0.3 mm between the back side of the stator yoke part and the rotor magnetic steel. According to the invention, the design is reasonable, through the multi-physical field collaborative design of the asymmetric magnetic poles and the nanocrystalline shielding layer, the motor noise is systematically suppressed from both an electromagnetic force harmonic source and a high-frequency magnetic leakage path, and both efficiency and reliability are considered.

A combined magnetic pole surface-mounted outer rotor of a permanent magnet hub motor relates to the technical field of motors, a rotor core of the rotor is provided with a plurality of magnetic steel groups, each magnetic steel group is symmetrically arranged around a rotating shaft of the rotor core, and each magnetic steel group comprises first magnetic steel, second magnetic steel and third magnetic steel which are sequentially arranged at intervals along the circumferential direction of the rotor core. The pole arc widths of the first magnetic steel, the second magnetic steel and the third magnetic steel are different; if the pole arc width of the first magnetic steel is a, the pole arc width of the second magnetic steel is b, the pole arc width of the third magnetic steel is c, and the magnetic pole distance among the first magnetic steel, the second magnetic steel and the third magnetic steel is x, a gt exists; bgt; c, a = b + x, and b = c + x. The rotor provided by the invention can reduce motor noise and torque ripple.

The utility model discloses a seat motor noise detection device, which belongs to the technical field of seat motor detection and comprises a mounting bottom plate, and a test assembly used for fixing a seat motor and detecting noise of the seat motor in a load state is mounted on the mounting bottom plate. The mounting bottom plate is provided with a counterweight switching assembly which is used for providing different loads for the test assembly and simulating different loads, and the test assembly is connected with the seat motor. Through the above mode, the seat motor detection device can simulate the actual use condition of the seat motor, fix and detect the seat motor needing to be detected, gradually increase the load during detection, detect the operation noise of the seat motor under different loads, and ensure that the seat motor can work normally under the rated load. Meanwhile, the performance of the seat motor under different loads can be analyzed, whether the seat motor operates in a design range or not is judged, the noise influence and the working efficiency of the seat motor are evaluated according to detection results under different loads, and whether improvement or maintenance is needed or not is judged.

The present application discloses a motor control method and related equipment. The method includes: obtaining the electrical angle information, target frequency angle information and three-phase current information of the target motor, wherein the target frequency angle information is the motor angle corresponding to the target frequency; determining the first reference angle information and the second reference angle information based on the electrical angle information and the target frequency angle information; determining the target voltage based on the first reference angle information, the second reference angle information, the three-phase current information, the electrical angle information, the harmonic given current information and the torque given current information; and controlling the target motor to operate based on the target voltage. The method provided in the present application can eliminate the current harmonic problem caused by bus voltage fluctuations, thereby achieving the effect of reducing motor noise. Other harmonic components generated by the bus voltage can be processed in the same way, and the scheme can also be extended to the automotive motor drive system, providing a feasible solution for electric vehicles to reduce the noise caused.

The present invention relates to a vehicle-internal audio device (100; 100'; 100''), comprising: - at least one microphone, in particular analog or digital (10), for recording -- engine noise (220) caused by at least one engine (210) associated with the vehicle (200), in particular the drive engine, as well as -- from non-engine noise caused by at least one source other than the engine (210), in particular independent of the engine (210), especially driver and / or passenger voices, tire noise, wind noise and other ambient noise; - at least one ANC unit (40) designed for adaptive noise suppression, by means of which the engine noises (220) detected by the microphone (10) can be processed, in particular suppressed; at least one autoencoder unit (30) upstream of the ANC unit (40), by means of which the motor noises (220) can be distinguished and / or separated from the non-motor noises.

The invention relates to an axial magnetic field motor noise suppression method and system. The method comprises the following steps: collecting current waveform, vibration spectrum and magnetic field distribution data in a motor operation state to construct a multi-dimensional operation state data set; performing synchronous coupling analysis on multi-dimensional operation state data in the operation state data set, and identifying harmonic component characteristics of a current waveform, resonant frequency characteristics of a vibration spectrum and spatial non-uniformity characteristics of magnetic field distribution to obtain a target characteristic set; constructing a dynamic suppression strategy set containing current waveform optimization, vibration frequency matching and magnetic field compensation strategies based on the target feature set; and generating a target phase compensation waveform parameter and a magnetic field adjustment instruction set according to the dynamic suppression strategy set, controlling an output current waveform according to the phase compensation waveform parameter, and correcting spatial magnetic field distribution according to the magnetic field adjustment instruction set so as to effectively suppress the operation noise of the axial magnetic field motor.

The present invention discloses a noise reduction component and a sweeping robot, wherein the sweeping robot comprises a machine body and a fan body, a driving wheel assembly and a rolling brush assembly arranged on the machine body, and the noise reduction component comprises at least two of an air duct noise reduction structure, a fan noise reduction structure, a motor noise reduction structure and a gear drive noise reduction structure; the fan noise reduction structure is connected between the fan body and the machine body; the air duct noise reduction structure is arranged in the air duct of the fan body to silence and reduce the noise of the airflow in the air duct; the motor noise reduction structure is to set the motor of the fan body as a brushless motor; the gear drive noise reduction structure is arranged in the machine body, and the gear drive noise reduction structure forms a noise reduction cavity that isolates the gear set of the driving wheel assembly and / or the gear set of the rolling brush assembly. The technical solution of the present invention aims to reduce the noise generated when the sweeping robot is working, so as to improve the comfort of using the sweeping robot.