CN114172435A - Post-processing method and system for operation noise and vibration data of asynchronous motor and computer readable storage medium - Google Patents
Post-processing method and system for operation noise and vibration data of asynchronous motor and computer readable storage medium Download PDFInfo
- Publication number
- CN114172435A CN114172435A CN202111446640.1A CN202111446640A CN114172435A CN 114172435 A CN114172435 A CN 114172435A CN 202111446640 A CN202111446640 A CN 202111446640A CN 114172435 A CN114172435 A CN 114172435A
- Authority
- CN
- China
- Prior art keywords
- rotating speed
- stator
- asynchronous motor
- order
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/01—Asynchronous machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a post-processing method, a post-processing system and a computer readable storage medium for analyzing running noise and vibration of an asynchronous motor, wherein firstly, colornorm is calculated through a rotor rotating speed n, the number and the trend of stator orders with low slip ratio S in a higher vehicle speed state are identified, and then the actual order number corresponding to the rotating speed of the stator is determined by contrasting a stator structure; according to the actual trend of the order, point-taking simulation calculation is carried out to generate the stator magnetic field rotating speed n 1. Through the stator magnetic field n1, the coluermap is recalculated, so that the problem that the stator order in the test data of the asynchronous motor deviates along with the load of the rotor rotating speed can be solved, and the purpose of eliminating the slip ratio in the noise vibration data of the asynchronous motor in a phase-changing manner is achieved, so that the method is used for accurately identifying the main noise order (such as the electromagnetic order, the zero-offset order and the like) information in the running process of the asynchronous motor, the peak value of the noise order of the asynchronous motor changing along with the rotating speed can be accurately extracted, and the NVH development efficiency of the asynchronous motor is effectively improved.
Description
Technical Field
The invention relates to a processing technology of running noise and vibration of a motor, in particular to a processing technology of noise vibration test data of an asynchronous driving motor.
Background
An electric drive system carried by a new energy vehicle type is basically a permanent magnet synchronous motor, a stator magnetic field is generated by an input symmetrical three-phase alternating current power supply, a rotor magnetic field is generated by a permanent magnet, and the rotating speed n of a rotor of the motor is always the same as the rotating speed n1 of a stator magnetic field; the interaction between the two magnetic fields enables the motor rotor to output and input torque. The main order characteristic of the electric drive carrying the synchronous motor is the same as that of a traditional power assembly calculation method, only the speed of the vehicle or the rotating speed of a half shaft is required to be recorded, or CAN line information is required to be read (the rotating speed of the motor in a CAN signal is directly read through a rotating speed sensor), and the rotating speed of the electric drive rotor is calculated or directly obtained by combining a speed reducer structure, so that the required electric drive order characteristic is further calculated.
For a new energy vehicle type carrying an asynchronous motor, the working principle of the asynchronous motor is greatly different from that of a permanent magnet synchronous motor, and the asynchronous motor needs to form induced potential and induced current in a rotor cage type winding through the rotating speed difference between the rotating speed of a stator magnetic field and the rotating speed of a rotor so as to further generate a rotor self rotating magnetic field. The main electromagnetic order times of the stator change all the time, so that the noise vibration test data read by the rotating speed of the rotor cannot be extracted, and objective order quantitative comparison cannot be performed. In the process of carrying out NVH development on an electric drive project carrying an asynchronous motor, great difficulty is caused.
An asynchronous motor carried by a new energy vehicle type is also called an induction motor, has the characteristics of simple structure, no demagnetization problem, convenience in manufacturing, use and maintenance and the like, and mainly comprises basic components such as a stator, a rotor, an end cover, a bearing and the like; when symmetrical three-phase positive rotating current with specific frequency f1 is input into the armature winding of the stator, a rotating magnetic field with rotating speed n1 is generated in the air information between the stator and the rotor; the rotor structure mainly comprises a cage-shaped winding, a magnetic conduction iron core, a rotating shaft and the like, wherein the cage-shaped winding and a rotating magnetic field of the stator generate relative motion, and induced electromotive force and induced current are generated in a closed winding in the rotor; further, the rotating magnetic field of the stator interacts with the current of the rotor conductor to generate electromagnetic torque, so that the rotor obtains a corresponding rotating speed n. The stator magnetic field rotating speed n1 and the rotor magnetic field rotating speed n are always different, so the motor is called an asynchronous motor. The slip ratio s of the asynchronous motor is a rotating magnetic field rotating speed n1 generated after symmetrical three-phase current with fixed frequency f1 is input into a stator, and a rotating magnetic field rotating speed n generated by induced current in a closed winding of a rotor, wherein the difference (n1-n) between the rotating speeds of the two magnetic fields is called a rotating speed difference, and the ratio (n1-n)/n1 of the rotating speed difference to the rotating speed of the stator is defined as the slip ratio s; according to the slip S value, the working state of the asynchronous motor at any time can be directly judged, and the working state mainly comprises a generator running state (S < 0), a motor running state (0 < S < 1) and an electromagnetic braking state (S > 1).
The permanent magnet synchronous motor is characterized in that the structure of a stator is the same as that of an asynchronous motor, a permanent magnet is embedded on a rotor, a rotor magnetic field always exists in the air inside the motor, when symmetrical three-phase positive rotating current with specific frequency f1 is input into an armature winding of the stator, a rotating magnetic field with the rotating speed of n1 generated by the stator appears in the air, and then the rotating magnetic field interacts with the rotor magnetic field, so that the rotor also obtains the same rotating speed of n 1.
Disclosure of Invention
The invention aims to provide a data post-processing method for running noise vibration of an asynchronous motor for an automobile, so as to eliminate the problem of load deviation of orders along with rotating speed caused by slip in test data of the asynchronous motor.
The asynchronous motor for the automobile has the characteristics of simple structure, convenience in manufacturing, using and maintaining and the like, and mainly comprises a stator, a rotor, an end cover, a bearing and other basic components; when symmetrical three-phase positive rotating current with specific frequency f1 is input into the armature winding of the stator, a rotating magnetic field with the rotating speed of n1 is generated in the air information between the stator and the rotor; the rotor structure mainly comprises a cage-shaped winding, a magnetic conduction iron core, a rotating shaft and the like, wherein the cage-shaped winding and the rotating magnetic field of the stator generate relative motion, the closed winding in the rotor generates induced electromotive force and induced current, and the rotating magnetic field of the stator and the current of a rotor conductor interact to generate electromagnetic torque so that the rotor obtains a rotating speed n; the stator magnetic field rotating speed n1 and the rotor magnetic field rotating speed n are always different, and the asynchronous motor is called because of the rotating speed difference.
The order is the response of vibration and noise caused by rotation of the structural rotating part, and the corresponding order response has a fixed corresponding relation with the rotating speed and the fundamental frequency and does not change along with the change of the rotating speed; i.e. the order is a multiple of the corresponding frequency of the rotating speed, and the rotating speed is kept unchanged. If 1 order is corresponding frequency of rotation speed, K order is K times of rotation frequency, and the ratio between fixed order and rotation frequency is kept unchanged.
The rotation speed difference of the asynchronous motor is the rotation speed n1 of a rotating magnetic field generated after symmetrical three-phase current is input into a stator and the rotation speed n of a magnetic field generated by induced current in a closed winding of a rotor, the difference (n1-n) of the rotation speeds of the two magnetic fields is called rotation speed difference, and the ratio (n1-n)/n1 of the rotation speed difference to the rotation speed of the stator is defined as a slip ratio s.
The slip ratio causes the order to deviate along with the rotating speed and the load of the rotor, and is a special phenomenon existing in the running process of the asynchronous motor; the slip varies with the motor speed and load. The rotation speed information conveniently acquired in the whole vehicle state mainly refers to the rotation speed (such as vehicle speed, wheel speed, half-axle rotation speed and the like) associated with the rotor rotation speed n and only corresponds to the rotor rotating magnetic field rotation speed. The stator rotating field rotation speed n1 cannot be read, and the slip s that changes with time changes in real time, and the relationship with the rotor rotating field rotation speed n is n1= n (1-s). When the components and the source of the orders of the acceleration and deceleration working conditions of the motor are analyzed, the corresponding relation between the electromagnetic orders corresponding to the stator and other parts and the rotating speed of the rotor is changed constantly, so that the order extraction method in the traditional data processing is invalid, and the target order cannot be identified and extracted. Taking the 12 th order of the number of stator poles of the asynchronous motor as an example: when the rotating speed of the rotor is higher than 3000rpm, the order is 12.4-12.3; the rotor operates at low speed and high torque of 0-3000 rpm, and the order is 24-12.3; and in the acceleration process, the rotation speed of the rotor is used for calculation, the 12 th order moment of the stator is in a change state, and objective comparison and analysis cannot be carried out by extraction.
The post-processing method for analyzing the running noise and the vibration of the asynchronous motor is characterized in that the rotation difference exists between the stator magnetic field rotation speed n1 of the asynchronous motor and the rotor magnetic field rotation speed n, so that the order of reading the stator structure by the rotor rotation speed n is caused, the order number shifts along with the change of the rotation speed and the load moment, and the stator order of the asynchronous motor cannot be extracted. Through post-processing, the stator rotating speed n1 is directly generated, and then the corresponding stator order is extracted through the stator magnetic field rotating speed n1, so that the problem that the stator order deviates along with the rotating speed load due to slip is solved.
Aiming at the problems, in order to realize the efficient and accurate extraction of the running noise order of the asynchronous motor, the invention provides a method for eliminating the order offset problem in the running noise vibration data processing of the asynchronous motor, firstly, the colorrmap is calculated through the rotor rotating speed n, the number and the trend of the stator order with the low slip ratio S in a higher vehicle speed state are identified, and then the actual order number corresponding to the stator rotating speed is determined by contrasting the stator structure; according to the actual trend of the order, point-taking simulation calculation is carried out to generate the stator magnetic field rotating speed n 1. Through the rotation speed n1 of the stator magnetic field and the recalculation of colorrmap, the problem that the stator order in the test data of the asynchronous motor deviates along with the load of the rotation speed of the rotor can be solved, and the purpose of eliminating the slip ratio in the noise vibration data of the asynchronous motor by changing the phase can be achieved.
The post-processing method for analyzing the running noise and the vibration of the asynchronous motor, which is provided by the invention, specifically comprises the following steps of:
step 1: preprocessing test data: and calculating a color chart colornormal of the acceleration process data through the rotating speed n of the rotor of the asynchronous motor to obtain initial version data with order deviation.
Step 2: stator order identification: according to the slip ratio s = (n1-n)/n1 formula of the asynchronous motor, identifying the stator order of the high rotating speed section of the asynchronous motor rotor, determining the electromagnetic order trend of the stator, selecting specific points and low rotating speed section order positions of 3-5 high rotating speed sections of the order, positioning when calculating the rotating speed of the stator according to the order continuity principle, and recording information such as frequency, time, rotor rotating speed and the like of the specific points.
And step 3: simulating and calculating the rotating speed n1 of the magnetic field of the stator: according to specific points recorded in the rotor rotating speed colorrmap, in an FFT vs time domain signal of a rotating speed simulation function of data processing software, according to information such as frequency, time, rotor rotating speed and the like of 3-5 recorded high rotating speed specific points, the fixed order position of the stator is identified, tracing points of rotating speed simulation points of each rotating speed section are completed through order continuity characteristics, and the rotating speed n1 of the stator magnetic field is obtained through calculation.
And 4, step 4: data synthesis, processing and checking: and (3) deriving data containing the stator magnetic field rotating speed n1, recalculating the acceleration process coloumap by using the stator magnetic field rotating speed n1 according to the step 1, checking that the ratio of the 12 th order and other orders of the stator to the stator rotating speed is kept unchanged, and if the offset bending phenomenon of the orders along with the rotor rotating speed and the load disappears, successfully calculating the stator magnetic field rotating speed n 1.
Further, obtaining the motor rotor speed n: reading the speed of the vehicle through a vehicle speed sensor, and converting the speed of the vehicle into the rotating speed of a half shaft through the size of a tire; and further calculating and converting the gear ratio of the speed reducer to the rotor into the rotating speed n of the motor rotor. Or the rotation speed of the half shaft is directly read and recorded through a photoelectric sensor, and the rotation speed n of the motor rotor is calculated through the gear ratio of the speed reducer to the rotor.
Further, the test data in step 1 is noise vibration data corresponding to acceleration and deceleration conditions of the whole vehicle obtained by testing and recording in actual road conditions through a noise vibration test device and arranging a microphone, a vibration sensor and a vehicle speed or half-shaft rotation speed sensor at a position where a requirement exists.
Further, the method is applied to automobiles, including but not limited to pure electric automobiles, hybrid automobiles, fuel cell automobiles, and the like, and may also be common internal combustion engine powered automobiles equipped with asynchronous motors.
By adopting the technical scheme, the invention has the following technical effects:
1. the invention can calculate the stator magnetic field rotating speed according to the stator structure characteristics and the test data, can accurately extract the required asynchronous motor operation order, and can eliminate the load offset problem of the order in the asynchronous motor test data along with the rotating speed, wherein the main electromagnetic order comprises but is not limited to fundamental frequency and frequency multiplication of pole-pair order, fundamental frequency and frequency multiplication of stator slot number order, fundamental frequency and frequency multiplication of switching frequency and zeroth order, and the like.
2. The invention can obviously improve the accuracy of extracting the stator order data of the asynchronous motor, particularly the accuracy of the motor order peak value at low rotating speed and large torque, and can greatly improve the data processing efficiency of the asynchronous motor.
3. According to the stator magnetic field rotating speed n1 obtained by post-processing, the slip ratio of the asynchronous motor corresponding to each moment of the motor can be further calculated, the working state of the asynchronous motor can be directly confirmed according to the slip ratio of each moment, and the above result cannot be obtained by the conventional slip ratio method.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention;
FIG. 2 is a schematic view of the order load deflection with rotational speed of the asynchronous machine rotor speed calculation of the present invention;
FIG. 3 is a schematic representation of the stator order points of the asynchronous machine of the present invention;
FIG. 4 is a comparison graph of stator and rotor speeds during acceleration of an asynchronous motor according to the present invention;
FIG. 5 is a 12 th order plot of the asynchronous machine stator speed calculation without load excursions with speed of rotation in accordance with the present invention;
fig. 6 is a graph showing the variation of slip rate with the acceleration time and the vehicle speed in the acceleration process of the asynchronous motor.
In the figure: 1-reading the actual order of the 12 th stator stage at the high speed section at the rotor speed, 2-reading the actual order of the 12 th stator stage at the low speed section at the rotor speed, 3-calculating the simulation point of the speed at the order, and 4-reading the 12 th stator stage at the stator speed.
Detailed Description
The technical solutions implemented by the present invention are further described below with reference to the drawings in the specification, the described embodiments are only a part of the embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the running process of the asynchronous motor, a rotation speed difference exists between the stator magnetic field rotation speed n1 and the rotor magnetic field rotation speed n, and the rotation speed difference causes that the main orders have the phenomenon of load deviation along with the rotation speed in the running noise vibration analysis process of the asynchronous motor. The method provided by the invention can solve the problem that the load deviation of the motor order along with the rotating speed can not be extracted due to the rotating speed difference in the acceleration and deceleration processes of the asynchronous motor, is used for accurately identifying the information of the main noise order (such as the electromagnetic order, the zeroth order and the like) in the operation process of the asynchronous motor, can accurately extract the variation peak value of the noise order of the asynchronous motor along with the rotating speed, and effectively improves the NVH development efficiency of the asynchronous motor.
Example 1:
FIG. 1 shows a detailed implementation process of the present invention, which comprises the following steps:
step 1: the axle shaft speed n2 is calculated.
And determining the state of a recorded speed signal in the noise vibration data by combining the actual test state of the running noise of the motor of the whole vehicle, and converting the speed signal into a half-shaft rotating speed signal. This step CAN be skipped if the half-shaft speed is directly recorded, or the CAN information includes the motor rotor signal.
In the embodiment, only vehicle speed information is taken as an example in test data, if the model of the wheel is determined to be 235/45R 16 (width/width-thickness ratio hub diameter is 24.5 mm), the hub diameter can be calculated to be 753 mm; and (3) calculating a conversion parameter between the vehicle speed and the half-axis rotation speed to be 0.14185 through a formula v = w × r between the linear velocity and the angular velocity radius, so that the conversion from the vehicle speed to the half-axis rotation speed can be completed, and a half-axis rotation speed signal n2 is generated.
Step 2: and calculating the rotation speed of the rotor.
And deducing the rotating speed n of the motor rotor according to the total reduction ratio of the speed reducer. If the CAN line information recorded by the test data contains the rotating speed of the motor rotor, the step CAN be skipped.
Here, taking an electrically-driven speed reducer of a Changan model as an example, the total speed reduction ratio between the input shaft and the output shaft of the speed reducer is 11.135, and the motor rotor speed n = n2 × 11.135 can be calculated according to the existing half-shaft speed n 2.
And step 3: and (4) preprocessing test data.
Noise vibration processing software in the NVH field, such as HEADARETMIs, LMS and the like, is adopted, a color chart colorrmap of acceleration process data is calculated according to the rotor rotating speed n of the asynchronous motor, and the rotor rotating speed n of the asynchronous motor is adopted as initial version data with the order deviation.
In order to facilitate data identification, the processing resolution of noise and vibration data is 5 Hz, and the speed-up step length is as follows: the step length of the vehicle speed is 0.5km/h, or the equivalent step length of the half-shaft rotating speed, or the equivalent step length of the motor rotating speed.
And 4, step 4: and identifying the order of the stator.
According to the definition of the slip s = (n1-n)/n1 formula of the asynchronous motor, the larger the stator magnetic field rotating speed n1 is, the larger the denominator is, the smaller the slip is; it can be determined that the asynchronous motor is operated at a high rotation speed (more than 3000rpm in actual projects), and in a colornormal diagram calculated by the rotation speed of the rotor, the offset of the order of the stator structure caused by the slip ratio can be greatly reduced. Taking 12 stages of the stator as an example, in a calculated colornorm diagram 1 calculated by using the rotating speed of the rotor, the rotating speed of the rotor is more than 3000rpm, and the 12 th stage of the stator structure is 12.4-12.3 stages and can be directly used for identifying and positioning the 12 th stage of the stator; furthermore, according to the step continuity characteristic, the variation trend of the 12 th step of the stator in the low rotating speed range of 0-3000 rpm can be identified, and the 12 th step of the stator is rapidly changed from the range of 24-12.3 and 8. According to the electromagnetic order trend determined by the operation, specific points of 3-5 high-rotation-speed sections of the order and the order positions of low-rotation-speed sections are selected, positioning is carried out when the rotation speed of the stator is calculated through the order continuity principle, and information such as the frequency, the time, the rotation speed of the rotor and the like of the specific points is recorded so as to facilitate next-step simulation.
Taking a certain Changan asynchronous electric driving acceleration data as an example, referring to fig. 2, the test data adopts the rotor speed of an asynchronous motor to calculate the acceleration process coloump, the 12 th order of the stator, the rotating speed of more than 3000rpm, is about 7 of 12.4-12.3 orders, and can be directly used for identifying and positioning the 12 th order of the stator; further, according to the order continuity, the variation trend of the 12 th order of the stator in the low rotating speed range of 0-3000 rpm is identified, the 12 th order of the stator rapidly changes from the range of 24-12.3 orders and 8 orders, and information such as frequency, time, rotor rotating speed and the like of the characteristic points is recorded.
And 5: the stator field speed n1 is calculated by simulation.
And according to specific points recorded in the rotor rotating speed colorrmap, in an FFT vs time signal in a rotating speed simulation function interface of data processing software, according to the recorded information of the frequency, the time, the rotor rotating speed and the like of more than 5 specific points, the change trend of the fixed order of the stator is identified, and the stator magnetic field rotating speed n1 is obtained through point drawing and calculation.
According to specific points recorded in the rotor rotating speed colorrmap, in an FFT vs time domain signal of a rotating speed simulation function of data processing software such as HEADAR (radio frequency analysis) and LMS (least mean square) and the like, according to information such as frequency, time, rotor rotating speed and the like of 3-5 recorded high rotating speed specific points, the fixed order position of the stator is identified, the description points of the rotating speed simulation points of each rotating speed section are completed through the order continuity characteristic, and the rotating speed n1 of the stator magnetic field is obtained through calculation.
Referring to fig. 3, the stator of the asynchronous motor is of a 6-pole 54-slot structure, the 54 th order position of the stator in the FFT vs time in the acceleration process is determined, the 54 th order trend is determined by using a point 3 drawn on the 54 th order of the stator, and the rotating speed n1 of the stator magnetic field is calculated.
Step 6: and (4) synthesizing, processing and checking data. ,
data including the stator magnetic field rotation speed n1 is derived by a data re-deriving function of data processing software such as HEADArtemis and LMS. According to the step 1, recalculating the acceleration process coloumap by using the stator magnetic field rotating speed n1, checking that the ratio of the 12 th order and other orders of the stator to the stator rotating speed is kept unchanged, and if the offset bending phenomenon of the orders along with the rotor rotating speed and the load disappears, calculating the stator magnetic field rotating speed n1 successfully. According to the existing stator magnetic field rotating speed n1 and rotor rotating speed n, the information with the requirement that the slip ratio changes along with the change of the speed in the acceleration process, the information with the requirement that the slip ratio changes along with the change of the speed and the like can be calculated.
Example 2
The present embodiment is a post-processing system for analyzing operating noise and vibration of an asynchronous motor for an automobile, which includes a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the post-processing system implements the post-processing method for analyzing operating noise and vibration of an asynchronous motor according to embodiment 1.
Example 3
This embodiment is a computer-readable storage medium on which a computer program is stored, which, when executed by a processor, implements the steps of the post-processing method of the asynchronous motor running noise and vibration analysis as described in embodiment 1.
The following are the effects achieved by the method and system of the present invention.
Referring to fig. 4, a comparison result of the stator magnetic field rotation speed n1 and the rotor rotation speed n is calculated according to the stator structure information of the asynchronous motor in the acceleration process; it can be determined that during the acceleration of the asynchronous machine, the stator field speed n1 is always greater than the rotor speed n.
Referring to fig. 5, the acceleration colourmap calculated according to the stator speed n1, the ratio of the 12 th order 10 of the stator to the stator speed remains unchanged, and the bending phenomenon of the order along with the deviation of the rotor speed and the load disappears.
Referring to fig. 6, it is a slip calculation result, and it can be seen that the slip varies with time during the acceleration process of the asynchronous motor.
Therefore, the method is suitable for post-processing analysis of noise vibration data in the running process of the asynchronous motor, and the rotating speed of the stator magnetic field is calculated by post-processing the test data which is acquired by the traditional test method and contains rotating speed information such as vehicle speed, half-shaft rotating speed and the like, so that the purpose of eliminating the slip ratio in the test data of the asynchronous motor is achieved. The method can realize accurate extraction of the main order of the asynchronous motor, is convenient for finding a characteristic frequency source, and improves the NVH data analysis efficiency and accuracy of the asynchronous motor.
In the foregoing specification, the subject matter of the invention has been described with reference to specific embodiments. However, various modifications and changes may be made without departing from the gist of the present invention as set forth in the claims. The drawings in the present specification are illustrative and not restrictive. The scope of the inventive concept should, therefore, be determined by the claims and their legal equivalents, rather than by the examples described. Any steps set forth in any method or process claims of this specification may be performed in any order or combination of orders and are not limited to the specific order presented in the examples given in the claims.
Claims (10)
1. A post-processing method for analyzing running noise and vibration of an asynchronous motor is characterized by comprising the following steps:
step 1: preprocessing test data: calculating a color chart colornormal of acceleration process data through the rotor rotating speed n of the asynchronous motor to obtain initial version data with order deviation;
step 2: stator order identification: according to the slip rate s = (n1-n)/n1 formula of the asynchronous motor, identifying the stator order of the high rotating speed section of the asynchronous motor rotor, determining the electromagnetic order trend of the stator, selecting specific points and low rotating speed section positions of 3-5 high rotating speed sections of the order, positioning when calculating the rotating speed of the stator according to the order continuity principle, and recording information such as frequency, time, rotor rotating speed and the like of the specific points;
and step 3: simulating and calculating the rotating speed n1 of the magnetic field of the stator: according to specific points recorded in the rotor rotating speed coloremp, in an FFT vs time domain signal of a rotating speed simulation function of data processing software, according to information such as frequency, time, rotor rotating speed and the like of recorded 3-5 high rotating speed specific points, the fixed order position of a stator is identified, tracing points of rotating speed simulation points of each rotating speed section are completed through order continuity characteristics, and the rotating speed n1 of the stator magnetic field is obtained through calculation;
and 4, step 4: data synthesis, processing and checking: and (3) deriving data containing the stator magnetic field rotating speed n1, recalculating the acceleration process coloumap by using the stator magnetic field rotating speed n1 according to the step 1, checking that the ratio of the 12 th order and other orders of the stator to the stator rotating speed is kept unchanged, and if the offset bending phenomenon of the orders along with the rotor rotating speed and the load disappears, successfully calculating the stator magnetic field rotating speed n 1.
2. The method for post-processing of operational noise and vibration analysis of an asynchronous motor according to claim 1, characterized in that the rotor speed n is calculated from the total reduction ratio of the speed reducer and the half-shaft speed n 2.
3. The method for post-processing running noise and vibration analysis of an asynchronous motor according to claim 1, characterized in that the half-shaft rotation speed is calculated according to the tire size by reading the vehicle speed through a vehicle speed sensor; or the rotation speed of the half shaft is directly read and recorded by a photoelectric sensor, or the rotation speed is obtained from a motor rotor signal in CAN information.
4. A method for post-processing of operational noise and vibration analysis of an asynchronous motor according to any of claims 1-3, characterized in that said high speed section means a rotor speed above 3000 rpm.
5. Post-processing method of running noise and vibration analysis of an asynchronous motor according to any of claims 1-3, characterized in that said data processing software includes but is not limited to HEADARETIMIS, LMS.
6. The method for analyzing the operation noise and vibration of the asynchronous motor according to any one of claims 1 to 3, wherein after the stator magnetic field rotation speed n1 is obtained in step 4, the information that the slip rate changes with time and the vehicle speed changes in the acceleration process can be calculated according to the stator magnetic field rotation speed n1 and the rotor rotation speed n.
7. The method for analyzing the operation noise and vibration of the asynchronous motor according to any one of claims 1 to 3, wherein the test data in the step 1 is the noise vibration data corresponding to the acceleration and deceleration conditions of the whole vehicle obtained by testing and recording in the actual road conditions through a noise vibration testing device and arranging a microphone, a vibration sensor, a vehicle speed or half-shaft rotation speed sensor at a required position.
8. Post-processing method for analysis of operating noise and vibrations of an asynchronous motor according to any of claims 1-3, characterized in that it is applied to automobiles, including but not limited to pure electric vehicles, hybrid vehicles, fuel cell vehicles, etc., and possibly also to ordinary internal combustion engine powered vehicles equipped with an asynchronous motor.
9. An after-processing system for analyzing operating noise and vibration of an asynchronous motor, comprising a processor and a memory, wherein the memory stores a computer program, and the computer program is executed by the processor to implement the after-processing method for analyzing operating noise and vibration of an asynchronous motor according to any one of claims 1 to 8.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for post-processing of operating noise and vibration analysis of an asynchronous motor according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111446640.1A CN114172435B (en) | 2021-11-30 | 2021-11-30 | Post-processing method, system and computer readable storage medium for operation noise and vibration data of asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111446640.1A CN114172435B (en) | 2021-11-30 | 2021-11-30 | Post-processing method, system and computer readable storage medium for operation noise and vibration data of asynchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114172435A true CN114172435A (en) | 2022-03-11 |
| CN114172435B CN114172435B (en) | 2023-06-02 |
Family
ID=80481944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111446640.1A Active CN114172435B (en) | 2021-11-30 | 2021-11-30 | Post-processing method, system and computer readable storage medium for operation noise and vibration data of asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114172435B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012417A (en) * | 1988-03-04 | 1991-04-30 | Nippondenso Co., Ltd. | Motor vehicle running control apparatus |
| US6278196B1 (en) * | 1995-12-08 | 2001-08-21 | Magnet-Motor Gesellschaft Fuer Magnet-Motorische T{Overscore (E)}Chnik Mbh | Motor vehicle with electrical generator |
| CN103001431A (en) * | 2012-12-10 | 2013-03-27 | 张加胜 | Direct-current asynchronous motor and driving control method |
| CN106092310A (en) * | 2016-04-21 | 2016-11-09 | 重庆理工大学 | A kind of automotive transmission vibration noise off-line test method |
| CN107544025A (en) * | 2017-08-30 | 2018-01-05 | 马鞍山马钢华阳设备诊断工程有限公司 | A kind of Asynchronous Motor Rotor-Bar Fault determination methods of composite electrical signal and vibration signal |
| CN109639198A (en) * | 2018-12-28 | 2019-04-16 | 珠海格力电器股份有限公司 | A kind of motor control method, system and motor |
| US20190372496A1 (en) * | 2016-12-27 | 2019-12-05 | Nidec Corporation | Motor control apparatus, motor system, motor control method, and integrated circuit device |
| CN112379261A (en) * | 2019-12-31 | 2021-02-19 | 上汽通用五菱汽车股份有限公司 | Motor rotating speed and structural parameter calculation method based on vibration noise analysis |
| CN112560302A (en) * | 2020-11-30 | 2021-03-26 | 武汉科技大学 | Electromagnetic noise simulation calculation method under acceleration condition of permanent magnet synchronous motor |
| CN112906145A (en) * | 2020-12-09 | 2021-06-04 | 华中科技大学 | Motor electromagnetic force and electromagnetic vibration noise analysis method and system |
| CN113489387A (en) * | 2021-07-30 | 2021-10-08 | 东方电气集团东方电机有限公司 | Method for weakening electromagnetic vibration and noise of permanent magnet synchronous motor with specific frequency |
| CN113591311A (en) * | 2021-07-30 | 2021-11-02 | 重庆长安汽车股份有限公司 | Method for evaluating order squeaking of electric automobile |
-
2021
- 2021-11-30 CN CN202111446640.1A patent/CN114172435B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012417A (en) * | 1988-03-04 | 1991-04-30 | Nippondenso Co., Ltd. | Motor vehicle running control apparatus |
| US6278196B1 (en) * | 1995-12-08 | 2001-08-21 | Magnet-Motor Gesellschaft Fuer Magnet-Motorische T{Overscore (E)}Chnik Mbh | Motor vehicle with electrical generator |
| CN103001431A (en) * | 2012-12-10 | 2013-03-27 | 张加胜 | Direct-current asynchronous motor and driving control method |
| CN106092310A (en) * | 2016-04-21 | 2016-11-09 | 重庆理工大学 | A kind of automotive transmission vibration noise off-line test method |
| US20190372496A1 (en) * | 2016-12-27 | 2019-12-05 | Nidec Corporation | Motor control apparatus, motor system, motor control method, and integrated circuit device |
| CN107544025A (en) * | 2017-08-30 | 2018-01-05 | 马鞍山马钢华阳设备诊断工程有限公司 | A kind of Asynchronous Motor Rotor-Bar Fault determination methods of composite electrical signal and vibration signal |
| CN109639198A (en) * | 2018-12-28 | 2019-04-16 | 珠海格力电器股份有限公司 | A kind of motor control method, system and motor |
| CN112379261A (en) * | 2019-12-31 | 2021-02-19 | 上汽通用五菱汽车股份有限公司 | Motor rotating speed and structural parameter calculation method based on vibration noise analysis |
| CN112560302A (en) * | 2020-11-30 | 2021-03-26 | 武汉科技大学 | Electromagnetic noise simulation calculation method under acceleration condition of permanent magnet synchronous motor |
| CN112906145A (en) * | 2020-12-09 | 2021-06-04 | 华中科技大学 | Motor electromagnetic force and electromagnetic vibration noise analysis method and system |
| CN113489387A (en) * | 2021-07-30 | 2021-10-08 | 东方电气集团东方电机有限公司 | Method for weakening electromagnetic vibration and noise of permanent magnet synchronous motor with specific frequency |
| CN113591311A (en) * | 2021-07-30 | 2021-11-02 | 重庆长安汽车股份有限公司 | Method for evaluating order squeaking of electric automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114172435B (en) | 2023-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kim | Analysis on the charateristics of variable reluctance resolver considering uneven magnetic fields | |
| Wang et al. | Bearing fault diagnosis of switched reluctance motor in electric vehicle powertrain via multisensor data fusion | |
| CN106612096A (en) | Method of estimating a temperature of a permanent magnet in a motor | |
| Wang et al. | Reduction of electromagnetic vibration and noise in permanent magnet motor for EVs by optimizing design of rotor based on GPR-PSO model | |
| Shrivastava et al. | Design of 3-phase BLDC motor for electric vehicle application by using finite element simulation | |
| Ma et al. | 3-D analytical model and direct measurement method of ultra-thin open-circuit air-gap field of interior permanent magnet synchronous motor with multi-segmented skew poles and multi-layered flat wire windings for electric vehicle | |
| Tak et al. | Analysis and design of an axial flux permanent magnet motor for in-wheel system using a novel analytical method combined with a numerical method | |
| Akar et al. | BLDC motor design and application for light electric vehicle | |
| JP2013119295A (en) | Method of analyzing performance of motor for hybrid vehicle | |
| CN114172435A (en) | Post-processing method and system for operation noise and vibration data of asynchronous motor and computer readable storage medium | |
| CN106026826A (en) | Networked measuring and controlling method for electric vehicle drive motor working condition matching control effectiveness | |
| Afjei et al. | A novel hybrid brushless dc motor/generator for hybrid vehicles applications | |
| Shao et al. | Design and optimisation of energy‐efficient PM‐assisted synchronous reluctance machines for electric vehicles | |
| Szántó et al. | Review of the modelling methods of series wound DC motors | |
| Jusoh et al. | Design and performance of 8slot-12pole permanent magnet flux switching machines for electric bicycle application | |
| Ustkoyuncu | Application of an in-wheel direct drive motor based on switched reluctance motors for low-power electric vehicles | |
| Kalt et al. | Impact of Electric Machine Design Parameters and Loss Types on Driving Cycle Efficiency | |
| Im et al. | Two-Step Optimum Design Process of PMSM to Improve Driving Efficiency and Harmonics of Lightweight Electric Vehicle | |
| CN115051610A (en) | Method and device for constructing sliding-mode flux linkage observer and demagnetization fault diagnosis method | |
| Bramerdorfer et al. | Computationally efficient system-level evaluation of battery electric vehicles | |
| Idris et al. | Torque Analysis of V-type Interior PMSM for Electric Vehicle Based on FEA Simulation | |
| KR101417666B1 (en) | Method for removing motor torque ripple of electric vehicle | |
| Boscaglia et al. | Balancing peak-torque and drive-cycle efficiency with magnet dimensioning of permanent magnet synchronous machines | |
| Finken et al. | Design rules for energy efficient IPM motors in HEV applications | |
| Rick et al. | Hybrid NVH Simulation for Electrical Vehicles I-Force Excitation Model for Electrical Machines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |