CN117669014A - Motor controller noise optimization method, device, equipment and storage medium - Google Patents
Motor controller noise optimization method, device, equipment and storage medium Download PDFInfo
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- 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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
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- 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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention belongs to the field of automobiles, and discloses a motor controller noise optimization method, a motor controller noise optimization device, motor controller noise optimization equipment and a storage medium. The method comprises the following steps: detecting an in-vehicle noise signal by a microphone provided at a preset position of the vehicle; when the noise signal in the vehicle meets a preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy; and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy. According to the invention, when the noise signal in the vehicle meets the preset noise optimization condition, the motor controller noise optimization is carried out on the vehicle according to the motor controller noise optimization strategy of the vehicle, so that the problem of the noise of the motor controller of the new energy automobile can be solved, and the driving experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a motor controller noise optimization method, a device, equipment and a storage medium.
Background
With the continuous development of new energy automobile industry, new energy automobile technology has become a research hotspot for various large automobile enterprises. Compared with the traditional vehicle, the new energy vehicle driving system becomes an electric driving system and a hybrid power system, and under the pure electric driving working condition, the problem of high-frequency squeal is prominent due to lack of masking of engine noise, wherein the high-frequency squeal comprises motor electromagnetic order noise, gear order noise and noise caused by motor controller switching frequency (hereinafter referred to as motor controller noise). Particularly, in the hill start working condition of the new energy automobile, obvious motor controller noise is easy to generate, and the motor controller noise frequency is high, so that a sense of harshness and boredom is not acceptable. In order to solve the noise problem of the motor controller, the switching frequency of the controller is usually increased, but too high switching frequency can cause too fast temperature rise of the motor, so that motor overcurrent faults are generated. Therefore, how to reduce the noise of the motor controller of the new energy automobile on the premise of avoiding the motor overcurrent becomes a technical problem to be solved urgently.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a motor controller noise optimization method, device, equipment and storage medium, and aims to solve the technical problem that motor overcurrent is easily caused by reducing motor controller noise by improving the switching frequency of a controller in the prior art.
To achieve the above object, the present invention provides a motor controller noise optimization method, which includes the steps of:
detecting an in-vehicle noise signal by a microphone provided at a preset position of the vehicle;
when the noise signal in the vehicle meets a preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy;
and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy.
Optionally, the step of optimizing the motor controller noise of the vehicle based on the motor controller noise optimization strategy includes:
when the motor controller noise optimization strategy is the controller switching frequency adjustment strategy, acquiring a preset controller switching frequency adjustment strategy table;
acquiring the motor rotating speed and the motor torque of the vehicle;
inquiring the preset controller switching frequency adjustment strategy table according to the motor rotating speed and the motor torque to obtain a target controller switching frequency;
and controlling the switching frequency of the motor controller based on the target controller switching frequency.
Optionally, the step of acquiring the noise optimization strategy of the motor controller of the vehicle when the noise signal in the vehicle meets a preset noise optimization condition includes:
when the noise signal in the vehicle meets the preset noise optimization condition, determining the vibration frequency of each motor controller of the vehicle;
determining whether a noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal;
and if the noise source is a motor controller, acquiring a motor controller noise optimization strategy of the vehicle.
Optionally, the step of determining whether the noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal includes:
determining the noise frequency corresponding to the noise signal in the vehicle;
comparing the noise frequency with the motor controller vibration frequency, and judging whether a motor controller with the motor controller vibration frequency consistent with the noise frequency exists or not;
and if the motor controller with the vibration frequency consistent with the noise frequency exists, determining that the noise source is the motor controller.
Optionally, the step of optimizing the motor controller noise of the vehicle based on the motor controller noise optimization strategy includes:
when the motor controller noise optimization strategy is the motor torque adjustment strategy, acquiring the current motor torque of each motor of the vehicle;
determining a target motor corresponding to the vibration frequency of the motor controller consistent with the noise frequency;
and adjusting the motor torque of each motor of the vehicle based on the current motor torque and the target motor.
Optionally, before the step of optimizing the motor controller noise of the vehicle based on the motor controller noise optimization strategy, the method further includes:
acquiring whole vehicle test information of the vehicle under different gradients;
the switching frequency of a motor controller is controlled in sections based on the motor rotating speed and the torque in the whole vehicle test information, and an in-vehicle noise signal is obtained;
when the noise signal in the vehicle meets the noise condition of the preset motor controller, acquiring the current target switching frequency, the target motor rotating speed and the target torque;
and generating a preset controller switching frequency adjustment strategy table according to the target switching frequency, the target motor rotating speed and the target torque.
Optionally, the motor controller noise optimization strategy further comprises an acoustic packaging strategy comprising a controller acoustic packaging and an electric drive assembly acoustic packaging.
In addition, to achieve the above object, the present invention also provides a noise optimizing apparatus for a motor controller, the apparatus comprising:
a detection module for detecting an in-vehicle noise signal through a microphone provided at a preset position of the vehicle;
the motor controller noise optimization strategy acquisition module is used for acquiring a motor controller noise optimization strategy of the vehicle when the noise signal in the vehicle meets a preset noise optimization condition, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy;
and the noise optimization module is used for optimizing the motor controller noise of the vehicle based on the motor controller noise optimization strategy.
In addition, in order to achieve the above object, the present invention also proposes a motor controller noise optimizing apparatus, the apparatus comprising: a memory, a processor, and a motor controller noise optimization program stored on the memory and executable on the processor, the motor controller noise optimization program configured to implement the steps of the motor controller noise optimization method as described above.
In addition, to achieve the above object, the present invention also proposes a storage medium having stored thereon a motor controller noise optimization program which, when executed by a processor, implements the steps of the motor controller noise optimization method as described above.
The invention detects noise signals in a vehicle through a microphone arranged at a preset position of the vehicle; when the noise signal in the vehicle meets a preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy; and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy. According to the invention, when the noise signal in the vehicle meets the preset noise optimization condition, the motor controller noise optimization is carried out on the vehicle according to the motor controller noise optimization strategy of the vehicle, so that the problem of the noise of the motor controller of the new energy automobile can be solved, and the driving experience of a user is improved.
Drawings
FIG. 1 is a schematic diagram of a motor controller noise optimization device for a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first embodiment of a noise optimization method of a motor controller according to the present invention;
FIG. 3 is a flowchart of a second embodiment of a noise optimization method of a motor controller according to the present invention;
FIG. 4 is a flowchart of a third embodiment of a noise optimization method of a motor controller according to the present invention;
FIGS. 5-8 are schematic diagrams of motor controller noise according to a third embodiment of the motor controller noise optimization method of the present invention;
fig. 9 is a block diagram showing the construction of a first embodiment of a noise optimizing apparatus for a motor controller according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a motor controller noise optimization device in a hardware running environment according to an embodiment of the present invention.
As shown in fig. 1, the motor controller noise optimizing apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-FI (Wi-FI) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the motor controller noise optimization device, and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a motor controller noise optimization program may be included in the memory 1005 as one type of storage medium.
In the motor controller noise optimization device shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the motor controller noise optimization device of the present invention may be provided in the motor controller noise optimization device, and the motor controller noise optimization device calls the motor controller noise optimization program stored in the memory 1005 through the processor 1001 and executes the motor controller noise optimization method provided by the embodiment of the present invention.
Based on the above-mentioned motor controller noise optimization device, an embodiment of the present invention provides a motor controller noise optimization method, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the motor controller noise optimization method of the present invention.
In this embodiment, the motor controller noise optimization method includes the following steps:
step S10: the noise signal in the vehicle is detected by a microphone provided at a preset position of the vehicle.
It should be noted that, the execution body of the embodiment may be a computing service device with functions of data processing, network communication and program running, such as a mobile phone, a tablet computer, a personal computer, or an electronic device or a noise optimization device of a motor controller, which can implement the above functions. The present embodiment and the following embodiments will be described below by taking the motor controller noise optimization apparatus as an example.
The preset positions may include a driver position on the left side of the vehicle and/or a rear passenger seat position on the right side of the vehicle, for example, a position of a front left door and/or a rear right door of the vehicle. The in-vehicle noise signal may be in-vehicle noise detected by the microphone, and an in-vehicle noise value and a frequency of the in-vehicle noise may be determined by the in-vehicle noise signal.
Step S20: and when the noise signal in the vehicle meets the preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy.
It should be noted that the preset noise optimization condition may include a preset noise target value, the noise value of the noise in the vehicle may be compared with the noise target value, when the noise value of the noise in the vehicle is greater than the noise target value, it is determined that the noise optimization needs to be performed on the motor controller, and the step of obtaining the noise optimization policy of the motor controller of the vehicle is performed. And when the noise value of the noise in the vehicle is smaller than or equal to the noise target value, judging that the noise optimization of the motor controller is not needed. The motor torque adjustment strategy may be to optimize motor controller noise by adjusting output torque of each motor when the vehicle is multi-motor driving, where when torque adjustment is performed on a plurality of motors, it is necessary to ensure that total torque output by the motors is unchanged. The controller switching frequency adjustment strategy can be to adjust the switching frequency of the motor controller according to the motor rotating speed and the torque of the vehicle on the premise of ensuring that the motor temperature rise of the vehicle meets the preset temperature rise requirement. The preset temperature rise requirement can be a preset temperature rise condition which is required to be met by the temperature rise of the motor.
Step S30: and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy.
It should be noted that, the motor controller noise optimization for the vehicle based on the motor controller noise optimization policy may be to ensure that the total output torque of the motor is unchanged and adjust the output torque of each motor when the motor controller noise optimization policy is a motor torque adjustment policy. When the motor controller noise optimization strategy is a controller switching frequency adjustment strategy, the motor rotating speed and the motor torque of the current motor are obtained, and the switching frequency of the motor controller is adjusted according to the motor rotating speed and the motor torque of the vehicle on the premise of meeting the preset temperature rise requirement.
The present embodiment detects an in-vehicle noise signal by a microphone provided at a preset position of the vehicle; when the noise signal in the vehicle meets a preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy; and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy. According to the embodiment, when the noise signal in the vehicle meets the preset noise optimization condition, the motor controller noise optimization is performed on the vehicle according to the motor controller noise optimization strategy of the vehicle, so that the problem of the noise of the motor controller of the new energy automobile can be solved, and the driving experience of a user is improved.
Referring to fig. 3, fig. 3 is a flowchart of a second embodiment of a noise optimization method for a motor controller according to the present invention.
Based on the first embodiment, in this embodiment, the step S30 includes:
step S301: and when the motor controller noise optimization strategy is the controller switching frequency adjustment strategy, acquiring a preset controller switching frequency adjustment strategy table.
It should be noted that, the preset controller switching frequency adjustment policy table may be that a motor controller noise test is performed on the vehicle in advance, and when the noise of the motor controller does not meet the preset noise optimization condition under different motor speeds and motor torques determined according to test data, the switching frequency of the corresponding motor controller is set to 6kHz, for example, when the motor speed is less than or equal to 200rpm and the motor torque is less than or equal to 200 Nm;
when the motor rotation speed is less than or equal to 200rpm and the motor torque is more than 200Nm, the switching frequency of the motor controller is set to be 4kHz;
when 200pm < motor speed < 2000rpm and motor torque > 200Nm, the switching frequency of the motor controller is set to be 5.5kHz;
when 200rpm < motor speed < 2000rpm and motor torque is less than or equal to 200Nm, the switching frequency of the motor controller is set to 7kHz. Specific preset controller switching frequency adjustment strategy tables may refer to the following table 1-preset controller switching frequency adjustment strategy table:
preset controller switching frequency regulation strategy table
| Motor speed | Motor torque | Switching frequency |
| 0-200rpm | ＞200Nm | 4kHz |
| 0-200rpm | ≤200Nm | 6kHz |
| 200-2000rpm | ＞200Nm | 5.5kHz |
| 200-2000rpm | ≤200Nm | 7kHz |
Step S302: and acquiring the motor rotating speed and the motor torque of the vehicle.
The motor rotation speed and the motor torque may be the current motor rotation speed and motor torque of the vehicle.
Step S303: inquiring the preset controller switching frequency adjustment strategy table according to the motor rotating speed and the motor torque to obtain the target controller switching frequency.
It should be noted that, the inquiring the preset controller switching frequency adjustment policy table according to the motor rotation speed and the motor torque may obtain the target controller switching frequency by searching the corresponding target controller switching frequency in the preset controller switching frequency adjustment policy table according to the motor rotation speed and the motor torque.
Step S304: and controlling the switching frequency of the motor controller based on the target controller switching frequency.
It should be appreciated that the motor controller noise optimization device controls the switching frequency of the motor controller based on the target controller switching frequency.
Further, in order to accurately determine the switching frequencies corresponding to the different motor speeds and the different motor torques, before the step S30, the method further includes: acquiring whole vehicle test information of the vehicle under different gradients;
the switching frequency of a motor controller is controlled in sections based on the motor rotating speed and the torque in the whole vehicle test information, and an in-vehicle noise signal is obtained;
when the noise signal in the vehicle meets the noise condition of the preset motor controller, acquiring the current target switching frequency, the target motor rotating speed and the target torque;
and generating a preset controller switching frequency adjustment strategy table according to the target switching frequency, the target motor rotating speed and the target torque.
It should be noted that, the obtaining of the whole vehicle test information of the vehicle under different gradients may be that the vehicle is stopped on a slope with a gradient of 8%, 12%, 20% and the like, and the vehicle starting operation is executed with an accelerator opening of 50%, 70%, 100% and the like, and the motor controller noise is tested and evaluated, so as to obtain the whole vehicle test information.
In a specific implementation, the specific steps of generating the preset controller switching frequency adjustment strategy table are as follows: and optimizing the noise of the motor controller by increasing the switching frequency of the motor controller on the premise that the noise value corresponding to the noise signal in the vehicle is larger than the noise target value in the preset noise optimization condition in the motor rotating speed and torque range of the motor control noise exceeding the target value. Because the motor controller noise is caused by its switching frequency, the higher the switching frequency, the less the controller noise. The specific method comprises the following steps: the vehicle starts on 8%, 12% and 20% of the ramp road surface respectively, the VCU controls the upper computer to adjust the hill start working condition to gradually increase the switching frequency of the front motor and the rear motor, corresponding motor controller vibration noise data are collected, the motor controller noise value is obtained until the noise target value is met, corresponding motor rotating speed and torque are recorded, and accordingly the motor switching frequency is determined. Aiming at the determined motor switching frequency, performing a motor temperature rise test, and if the motor temperature rise meets the requirement, optimizing the motor switching frequency as a final motor switching frequency control strategy; otherwise, the switching frequency control strategy is adjusted, and the motor switching frequency in the torque range of the problem of motor temperature rise is reduced until the motor temperature rise requirement is met.
It should be understood that in the hill start process of the new energy automobile, when the rotation speed of the motor is low, the motor is easy to be blocked, and in order to prevent the motor controller from overcurrent, the switching frequency of the motor controller is usually low, so that the noise of the motor controller for the new energy automobile is obvious in the hill start process. To cope with this problem, if the switching frequency of the controller in the low-speed region of the motor is simply raised, the noise of the motor controller can be reduced, but at the same time, the risk of overcurrent of the motor controller is increased, and the optimization of the problem cannot be applied. In the embodiment, the motor rotating speed and the motor torque are detected in real time, and the switching frequency of the motor controller is controlled in a segmented mode according to the motor rotating speed and the torque: when the motor rotating speed is lower and the motor torque is larger, a lower motor controller switching frequency is adopted; when the motor rotation speed is low and the motor torque is small, a high motor controller switching frequency is adopted. When the motor torque is large, the new energy automobile starts quickly, the noise perception of the motor controller is not obvious, and when the motor torque is small, the new energy automobile starts slowly, but because the switching frequency of the motor controller is high, the noise of the motor controller is small. Therefore, the technical scheme provided by the embodiment can avoid overcurrent of the motor controller while optimizing the noise of the motor controller in the starting process of the new energy automobile, especially in the hill starting process.
Further, the larger the motor torque is, namely the larger the starting accelerator is, the shorter the vehicle starting time is, and meanwhile, the expected reduction of NVH by a user under the working condition of large accelerator starting can properly increase the limit value of the noise of the motor controller, so that the switching frequency can be properly reduced. If the motor controller noise increases too much, the noise can be optimized by an acoustic wrapping strategy.
In the embodiment, when the noise optimization strategy of the motor controller is the controller switching frequency adjustment strategy, a preset controller switching frequency adjustment strategy table is obtained; acquiring the motor rotating speed and the motor torque of the vehicle; inquiring the preset controller switching frequency adjustment strategy table according to the motor rotating speed and the motor torque to obtain a target controller switching frequency; and controlling the switching frequency of the motor controller based on the target controller switching frequency. According to the embodiment, the preset controller switching frequency adjustment strategy table is queried according to the motor rotating speed and the motor torque of the vehicle, the target controller switching frequency is obtained, and the problem that the motor temperature rise is too fast and motor overcurrent faults are generated due to the fact that the switching frequency of the motor controller is always improved, and noise of the motor controller is reduced is avoided.
Referring to fig. 4, fig. 4 is a flowchart of a third embodiment of a noise optimization method of a motor controller according to the present invention.
Based on the above embodiments, in this embodiment, the step S20 includes:
step S201: and when the noise signal in the vehicle meets the preset noise optimization condition, determining the vibration frequency of the motor controller of each motor controller of the vehicle.
It should be understood that in this embodiment, a vibration acceleration sensor is disposed on a motor controller of a vehicle, microphones are disposed at preset positions of the vehicle, the microphones and the vibration acceleration sensor are connected to a front end of vibration noise data collection through cables, an OBD diagnosis port of an automobile CAN bus is connected to the front end of vibration noise data collection and a VCU control host computer through an OBD adapter cable, the front end of vibration noise data collection is connected to a computer, and a motor controller noise system is formed.
Step S202: and determining whether a noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal.
It should be noted that, whether the noise source is determined based on the motor controller vibration frequency and the noise signal in the vehicle is the motor controller may be determined by comparing the frequency corresponding to the noise signal in the vehicle with the vibration frequency of the motor controller when the vehicle has only one motor. When the vehicle comprises a plurality of motors, respectively comparing the frequencies of in-vehicle noise signals corresponding to the motor controllers with the vibration frequencies of the motor controllers, determining the motor controllers with the frequencies corresponding to the noise signals and consistent with the vibration frequencies of the motor controllers, if the motor controllers exist, taking the motor controllers with the frequencies corresponding to the noise signals and consistent with the vibration frequencies of the motor controllers as noise source controllers, and if the motor controllers do not exist, judging that the noise source is not the motor controller.
Further, to accurately determine whether the source of noise is a motor controller. The step S202 may include: determining the noise frequency corresponding to the noise signal in the vehicle;
comparing the noise frequency with the motor controller vibration frequency, and judging whether a motor controller with the motor controller vibration frequency consistent with the noise frequency exists or not;
and if the motor controller with the vibration frequency consistent with the noise frequency exists, determining that the noise source is the motor controller.
The noise frequency may be a noise frequency corresponding to an in-vehicle noise signal detected by a microphone disposed at a preset position of the vehicle.
In a specific implementation, the motor controller noise optimization device compares the motor controller vibration frequency corresponding to each motor controller on the vehicle with the noise frequency corresponding to the noise signal in the vehicle, judges whether the motor controller corresponding to the motor controller vibration frequency consistent with the noise frequency exists, if so, judges that the noise source is the motor controller, and the motor controller corresponding to the motor controller vibration frequency consistent with the noise frequency is the noise source controller.
Further, in order to improve noise optimization efficiency, the step of performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy includes:
when the motor controller noise optimization strategy is the motor torque adjustment strategy, acquiring the current motor torque of each motor of the vehicle;
determining a target motor corresponding to the vibration frequency of the motor controller consistent with the noise frequency;
and adjusting the motor torque of each motor of the vehicle based on the current motor torque and the target motor.
It should be understood that the motor torque adjustment strategy refers to adjusting the front and rear motor torque distribution ratio by controlling the upper computer through the VCU on the premise of ensuring that the total driving torque of the front and rear motors is unchanged, and the adjustment principle is to reduce the driving torque of the motor with large contribution to the noise of the motor controller, namely the driving torque of the target motor, improve the driving torque of other motors and ensure that the total driving torque of the front and rear motors is unchanged.
Step S203: and if the noise source is a motor controller, acquiring a motor controller noise optimization strategy of the vehicle.
It should be noted that, the noise optimization strategy of the motor controller further includes an acoustic wrapping strategy, where the acoustic wrapping strategy refers to: aiming at the motor with large noise contribution of the motor controller, the acoustic wrapping of the controller or the acoustic wrapping of the electric drive assembly is carried out, or the sound insulation performance of the whole vehicle is improved. The motor with large noise contribution to the motor controller can be a motor with the frequency corresponding to the noise signal consistent with the vibration frequency of the motor controller.
In a specific implementation, fig. 5 is a 20% hill start in-car noise color chart of a vehicle, under the working condition, the switching frequency of an in-car motor controller is 4000Hz, obvious high-frequency howling is perceived in the car, and through an NVH test, it is confirmed that the maximum value of noise generated by a rear motor controller reaches 25dB (a).
The motor torque distribution strategy before and after the vehicle climbs the slope is adjusted to 4:6 from 2:8, the noise of the motor controller in the vehicle is obviously reduced, the maximum value after optimization is 21dB (A), and the noise pair in the vehicle for 20% of hill start is adjusted as shown in fig. 6.
The carrier frequency of the motor controller is adjusted to be increased from 4000Hz to 6500Hz, the noise of the motor controller in the automobile is continuously reduced, the maximum value after optimization is 16dB (A), and the carrier frequency of the motor controller in the automobile is adjusted to be as shown in the figure 7.
And the motor package is added, the noise of the motor controller in the automobile reaches the target, and the optimized noise is 7dB (A), so that the target of the whole automobile is met. The motor adds a motor to wrap the noise pair in the vehicle such as shown in fig. 8.
When the noise signal in the vehicle meets the preset noise optimization condition, the embodiment determines the vibration frequency of the motor controller of each motor controller of the vehicle; determining whether a noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal; and if the noise source is a motor controller, acquiring a motor controller noise optimization strategy of the vehicle. According to the method, whether the noise source is the motor controller or not is determined based on the motor controller vibration frequency and the noise signal in the vehicle, when the noise source is the motor controller, the motor controller noise optimization is performed on the vehicle according to the motor controller noise optimization strategy of the vehicle, and when the vehicle comprises a plurality of motors, the target motor meeting the preset noise optimization condition can be determined, so that the noise optimization is performed on the target motor, and the noise optimization efficiency is improved.
Referring to fig. 9, fig. 9 is a block diagram showing the structure of a first embodiment of a noise optimizing apparatus for a motor controller according to the present invention.
As shown in fig. 9, a noise optimization device for a motor controller according to an embodiment of the present invention includes:
a detection module 10 for detecting an in-vehicle noise signal by a microphone provided at a preset position of the vehicle;
a motor controller noise optimization strategy obtaining module 20, configured to obtain a motor controller noise optimization strategy of the vehicle when the noise signal in the vehicle meets a preset noise optimization condition, where the motor controller noise optimization strategy includes a motor torque adjustment strategy and a controller switching frequency adjustment strategy;
a noise optimization module 30 for motor controller noise optimization of the vehicle based on the motor controller noise optimization strategy.
The present embodiment detects an in-vehicle noise signal by a microphone provided at a preset position of the vehicle; when the noise signal in the vehicle meets a preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy; and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy. According to the embodiment, when the noise signal in the vehicle meets the preset noise optimization condition, the motor controller noise optimization is performed on the vehicle according to the motor controller noise optimization strategy of the vehicle, so that the problem of the noise of the motor controller of the new energy automobile can be solved, and the driving experience of a user is improved.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the motor controller noise optimization method provided in any embodiment of the present invention, which is not described herein.
Based on the first embodiment of the motor controller noise optimizing device of the present invention, a second embodiment of the motor controller noise optimizing device of the present invention is proposed.
In this embodiment, the noise optimization module 30 is further configured to obtain a preset controller switching frequency adjustment policy table when the motor controller noise optimization policy is the controller switching frequency adjustment policy;
acquiring the motor rotating speed and the motor torque of the vehicle;
inquiring the preset controller switching frequency adjustment strategy table according to the motor rotating speed and the motor torque to obtain a target controller switching frequency;
and controlling the switching frequency of the motor controller based on the target controller switching frequency.
Further, the motor controller noise optimization strategy obtaining module 20 is further configured to determine a motor controller vibration frequency of each motor controller of the vehicle when the noise signal in the vehicle meets a preset noise optimization condition;
determining whether a noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal;
and if the noise source is a motor controller, acquiring a motor controller noise optimization strategy of the vehicle.
Further, the motor controller noise optimization strategy obtaining module 20 is further configured to determine a noise frequency corresponding to the noise signal in the vehicle;
comparing the noise frequency with the motor controller vibration frequency, and judging whether a motor controller with the motor controller vibration frequency consistent with the noise frequency exists or not;
and if the motor controller with the vibration frequency consistent with the noise frequency exists, determining that the noise source is the motor controller.
Further, the motor controller noise optimization strategy obtaining module 20 is further configured to obtain a current motor torque of each motor of the vehicle when the motor controller noise optimization strategy is the motor torque adjustment strategy;
determining a target motor corresponding to the vibration frequency of the motor controller consistent with the noise frequency;
and adjusting the motor torque of each motor of the vehicle based on the current motor torque and the target motor.
Further, the noise optimization module 30 is further configured to obtain vehicle test information of the vehicle under different gradients;
the switching frequency of a motor controller is controlled in sections based on the motor rotating speed and the torque in the whole vehicle test information, and an in-vehicle noise signal is obtained;
when the noise signal in the vehicle meets the noise condition of the preset motor controller, acquiring the current target switching frequency, the target motor rotating speed and the target torque;
and generating a preset controller switching frequency adjustment strategy table according to the target switching frequency, the target motor rotating speed and the target torque.
Further, the motor controller noise optimization strategy further includes an acoustic packaging strategy that includes a controller acoustic packaging and an electric drive assembly acoustic packaging.
Other embodiments or specific implementation manners of the noise optimization device for a motor controller according to the present invention may refer to the above method embodiments, and will not be described herein.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium is stored with a motor controller noise optimization program, and the motor controller noise optimization program realizes the steps of the motor controller noise optimization method when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. read-only memory/random-access memory, magnetic disk, optical disk), comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A motor controller noise optimization method, characterized in that the motor controller noise optimization method comprises the following steps:
detecting an in-vehicle noise signal by a microphone provided at a preset position of the vehicle;
when the noise signal in the vehicle meets a preset noise optimization condition, acquiring a motor controller noise optimization strategy of the vehicle, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy;
and performing motor controller noise optimization on the vehicle based on the motor controller noise optimization strategy.
2. The motor controller noise optimization method of claim 1, wherein the step of motor controller noise optimizing the vehicle based on the motor controller noise optimization strategy comprises:
when the motor controller noise optimization strategy is the controller switching frequency adjustment strategy, acquiring a preset controller switching frequency adjustment strategy table;
acquiring the motor rotating speed and the motor torque of the vehicle;
inquiring the preset controller switching frequency adjustment strategy table according to the motor rotating speed and the motor torque to obtain a target controller switching frequency;
and controlling the switching frequency of the motor controller based on the target controller switching frequency.
3. The motor controller noise optimization method according to claim 1, wherein the step of acquiring the motor controller noise optimization strategy of the vehicle when the in-vehicle noise signal satisfies a preset noise optimization condition includes:
when the noise signal in the vehicle meets the preset noise optimization condition, determining the vibration frequency of each motor controller of the vehicle;
determining whether a noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal;
and if the noise source is a motor controller, acquiring a motor controller noise optimization strategy of the vehicle.
4. The motor controller noise optimization method of claim 3, wherein the step of determining whether a noise source is a motor controller based on the motor controller vibration frequency and the in-vehicle noise signal comprises:
determining the noise frequency corresponding to the noise signal in the vehicle;
comparing the noise frequency with the motor controller vibration frequency, and judging whether a motor controller with the motor controller vibration frequency consistent with the noise frequency exists or not;
and if the motor controller with the vibration frequency consistent with the noise frequency exists, determining that the noise source is the motor controller.
5. The motor controller noise optimization method of claim 4, wherein the step of motor controller noise optimizing the vehicle based on the motor controller noise optimization strategy comprises:
when the motor controller noise optimization strategy is the motor torque adjustment strategy, acquiring the current motor torque of each motor of the vehicle;
determining a target motor corresponding to the vibration frequency of the motor controller consistent with the noise frequency;
and adjusting the motor torque of each motor of the vehicle based on the current motor torque and the target motor.
6. The motor controller noise optimization method of claim 2, further comprising, prior to the step of motor controller noise optimizing the vehicle based on the motor controller noise optimization strategy:
acquiring whole vehicle test information of the vehicle under different gradients;
the switching frequency of a motor controller is controlled in sections based on the motor rotating speed and the torque in the whole vehicle test information, and an in-vehicle noise signal is obtained;
when the noise signal in the vehicle meets the noise condition of the preset motor controller, acquiring the current target switching frequency, the target motor rotating speed and the target torque;
and generating a preset controller switching frequency adjustment strategy table according to the target switching frequency, the target motor rotating speed and the target torque.
7. The motor controller noise optimization method of any one of claims 1-5, wherein the motor controller noise optimization strategy further comprises an acoustic packaging strategy comprising a controller acoustic packaging and an electric drive assembly acoustic packaging.
8. A motor controller noise optimization device, characterized in that the motor controller noise optimization device comprises:
a detection module for detecting an in-vehicle noise signal through a microphone provided at a preset position of the vehicle;
the motor controller noise optimization strategy acquisition module is used for acquiring a motor controller noise optimization strategy of the vehicle when the noise signal in the vehicle meets a preset noise optimization condition, wherein the motor controller noise optimization strategy comprises a motor torque adjustment strategy and a controller switching frequency adjustment strategy;
and the noise optimization module is used for optimizing the motor controller noise of the vehicle based on the motor controller noise optimization strategy.
9. A motor controller noise optimization apparatus, the apparatus comprising: a memory, a processor and a motor controller noise optimization program stored on the memory and executable on the processor, the motor controller noise optimization program configured to implement the steps of the motor controller noise optimization method of any one of claims 1 to 7.
10. A storage medium having stored thereon a motor controller noise optimization program which, when executed by a processor, implements the steps of the motor controller noise optimization method of any one of claims 1 to 7.
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