CN117485139A - Method and device for improving efficiency of electric drive system, electronic equipment and storage medium - Google Patents
Method and device for improving efficiency of electric drive system, electronic equipment and storage medium Download PDFInfo
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- CN117485139A CN117485139A CN202311295069.7A CN202311295069A CN117485139A CN 117485139 A CN117485139 A CN 117485139A CN 202311295069 A CN202311295069 A CN 202311295069A CN 117485139 A CN117485139 A CN 117485139A
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- 238000012545 processing Methods 0.000 claims description 8
- 230000003595 spectral effect Effects 0.000 claims description 6
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
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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 relates to a new energy automobile technology, and discloses a method, a device, electronic equipment and a storage medium for improving efficiency of an electric drive system, wherein the method comprises the following steps: acquiring efficiency improvement judging parameters of a target vehicle; judging whether the efficiency improvement condition of the electric drive system is met or not according to the efficiency improvement judging parameter; and when the efficiency improvement condition is met, adjusting the switching frequency and the harmonic injection function of the electric drive system to improve the efficiency of the electric drive system. The invention can improve the efficiency of the electric drive system.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a method, a device, electronic equipment and a storage medium for improving efficiency of an electric drive system.
Background
The new energy market is increasingly competing, and the pursuit of endurance mileage, electric drive system efficiency and cost by host factories and electric drive system suppliers is increasingly emphasized. The reason for pursuing the efficiency of the electric drive system is that when the efficiency of the electric drive system is higher, the same high-voltage battery pack capacity corresponds to a longer range, otherwise, the high-voltage battery pack capacity can be reduced under the same range requirement, and the purpose of reducing the cost is achieved.
The efficiency of current electric drive systems has tended to be substantial, both from the motor, motor controller hardware and software control points of view, from which it has been difficult to have room to further increase efficiency, and therefore measures to increase efficiency are necessary from other points of view. For example, the higher the switching frequency of the power device among the controllers in the efficiency of the electric drive system, the greater the switching loss of the power device, so reducing the switching frequency can reduce the loss in some situations, improving the efficiency of the electric drive system; the electric drive system uses a small part of bus voltage in harmonic injection to generate harmonic current and generates extra loss correspondingly, so that the purpose of improving the efficiency of the electric drive system can be achieved by reducing or even closing the harmonic injection. However, in order to achieve the NVH (noise, vibration and harshness) goal of the whole vehicle, it is generally necessary to put the switching frequency of the power device in the controller above 6kHz, and at the same time, turn on the harmonic injection function.
Therefore, how to improve the efficiency of the electric drive system is a problem to be solved.
Disclosure of Invention
The invention provides a method, a device, electronic equipment, a computer readable storage medium and a storage medium for improving the efficiency of an electric drive system, and aims to solve the problem of improving the efficiency of the electric drive system.
To achieve the above object, the present invention provides a method for improving efficiency of an electric drive system, including:
acquiring efficiency improvement judging parameters of a target vehicle;
judging whether the efficiency improvement condition of the electric drive system is met or not according to the efficiency improvement judging parameter;
and when the efficiency improvement condition is met, adjusting the switching frequency and the harmonic injection function of the electric drive system to improve the efficiency of the electric drive system.
Optionally, when the efficiency improvement determination parameter is an in-vehicle environmental sound of the target vehicle, the determining whether the efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement determination parameter includes:
performing spectral feature analysis on the in-car environmental sound to obtain environmental sound characteristics;
judging whether the sound volume level in the environmental sound characteristic is larger than a vehicle NVH target;
when the sound volume level in the environmental sound characteristic is larger than the NVH target of the whole vehicle, the condition that the efficiency of the electric drive system is improved is met;
and when the sound volume level in the environmental sound characteristic is smaller than or equal to the NVH target of the whole vehicle, the efficiency improvement condition of the electric drive system is not met.
Optionally, the performing spectral feature analysis on the in-vehicle environmental sound to obtain an environmental sound characteristic includes:
performing smoothing processing on the audio signal of the in-car environment sound to obtain a standard audio signal;
performing Fourier transform calculation on the standard audio signal to obtain a frequency domain signal;
calculating the amplitude spectrum of each frequency component in the frequency domain signal;
and calculating the sound pressure level of the amplitude spectrum according to a sound pressure level formula to obtain the sound pressure level corresponding to each frequency component, and taking the sound pressure level corresponding to each frequency component as an environmental sound characteristic.
Optionally, when the efficiency improvement determination parameter is the route information in the navigation map, the determining whether the efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement determination parameter includes:
acquiring a journey destination and a current position in the journey information;
carrying out vehicle power consumption analysis according to the current position and the travel destination to obtain required electric quantity;
judging whether the residual electric quantity of the target vehicle is smaller than the required electric quantity or not;
when the residual electric quantity of the target vehicle is smaller than or equal to the required electric quantity, the method indicates that the efficiency improvement condition of the electric drive system is met;
and when the residual electric quantity of the target vehicle is larger than the required electric quantity, the efficiency improvement condition of the electric drive system is not met.
Optionally, the electric drive system comprises a control unit and a motor controller, wherein:
the control unit is used for generating an efficiency improving instruction of the electric drive system when the efficiency improving condition is met;
and after receiving the efficiency improvement instruction, the motor controller adjusts the switching frequency and the harmonic injection function of the electric drive system.
Optionally, the adjusting the switching frequency of the electric drive system and the harmonic injection function includes:
selecting a switching frequency control target value according to the efficiency improving instruction and a preset switching frequency table;
and adjusting the switching frequency according to the switching frequency control target value;
and switching the harmonic injection function according to the zone bit in the efficiency improvement instruction.
Optionally, the efficiency improvement determination parameter is a human input instruction; the personnel input instruction comprises a voice instruction, a text instruction or a button triggered instruction;
if the personnel input instruction meets the instruction requirement, judging that the efficiency improvement condition is met.
In order to solve the above-mentioned problems, the present invention also provides an apparatus for improving efficiency of an electric drive system, the apparatus comprising:
the judging parameter acquisition module is used for acquiring efficiency improvement judging parameters of the target vehicle;
the efficiency improvement judging module is used for judging whether the efficiency improvement condition of the electric drive system is met according to the efficiency improvement judging parameters;
and the electric drive system efficiency improving module is used for adjusting the switching frequency and the harmonic injection function of the electric drive system when the efficiency improving condition is met so as to improve the efficiency of the electric drive system.
In order to solve the above-mentioned problems, the present invention also provides an electronic apparatus including:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of improving efficiency of an electric drive system described above.
In order to solve the above-mentioned problems, the present invention also provides a computer-readable storage medium having stored therein at least one computer program that is executed by a processor in an electronic device to implement the above-mentioned method of improving efficiency of an electric drive system.
According to the invention, by detecting the condition that the NVH target is triggered to change, the application range of the control of the electric drive system is changed, and the switching frequency and the harmonic injection function are adjusted when the efficiency improving condition is met, so that the efficiency of the electric drive system is improved; and, from the whole car end view: and new device equipment is not required to be added, the efficiency is improved by integrating the condition parameters of the whole vehicle, the application boundary of the whole vehicle is enlarged, and the vehicle cost is reduced. Therefore, the method, the device, the electronic equipment, the computer readable storage medium and the storage medium for improving the efficiency of the electric drive system can solve the problem of improving the efficiency of the electric drive system.
Drawings
FIG. 1 is a flow chart illustrating a method for improving efficiency of an electric drive system according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for determining an efficiency improvement condition of an electric drive system when an efficiency improvement determination parameter is an in-vehicle environmental sound of a target vehicle according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for determining efficiency improvement conditions of an electric drive system when efficiency improvement determination parameters provided by an embodiment of the present invention are path information in a navigation map;
FIG. 4 is a functional block diagram of an apparatus for improving efficiency of an electric drive system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device implementing the method for improving efficiency of an electric driving system according to an embodiment of 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.
The embodiment of the application provides a method for improving efficiency of an electric drive system. The execution subject of the method for improving efficiency of an electric drive system includes, but is not limited to, at least one of a server, a terminal, and the like, which can be configured to execute the method provided by the embodiments of the present application. In other words, the method of improving efficiency of the electric drive system may be performed by software or hardware installed in the terminal device or the server device. The service end includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, and the like. The server may be an independent server, or may be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and basic cloud computing services such as big data and artificial intelligence platforms.
Referring to fig. 1, a flow chart of a method for improving efficiency of an electric drive system according to an embodiment of the invention is shown. In this embodiment, the method for improving efficiency of an electric drive system includes:
s1, acquiring efficiency improvement judging parameters of a target vehicle.
In the embodiment of the present invention, the efficiency improvement determination parameter may be an in-vehicle environmental sound (or a driving seat environmental sound) of the target vehicle, or route information (for example, a travel destination and a current position) in a navigation map. Specifically, the environmental sound in the vehicle can be collected by a microphone arranged at the position of a headrest of the driving position or the position of a roof above the driving position; the travel destination and the current position can be acquired by data crawler or data embedding point and the like on the navigation information.
In an actual application scene of the invention, in order to achieve the NVH (noise, vibration and harshness) target of the whole vehicle, the switching frequency of a power device in a controller is usually required to be above 6kHz, and meanwhile, a harmonic injection function is opened.
In detail, the higher the switching frequency is, the larger the switching loss of the power device is, so the loss can be reduced by reducing the switching frequency in some situations, and the efficiency of the electric drive system is improved; the harmonic injection uses a small part of bus voltage, and the generated current counteracts the harmonic current of the motor, so that although the noise is reduced, the harmonic injection correspondingly generates extra loss, and therefore, the aim of improving the efficiency of the electric drive system can be achieved by reducing or even closing the harmonic injection.
In particular, whole vehicle NVH refers to the problem of whole vehicle Noise, vibration and stiffness (Noise, vibration and Harshness), which is an important consideration in automotive engineering because it is directly related to riding comfort and driving experience; sources of vehicle NVH problems may be numerous, including engine noise, wind noise, road noise, suspension vibrations, etc., and in order to solve these problems, noise control of the vehicle to a specific range content (e.g., less than 60 decibels (dB)) is achieved by using sound insulation materials to reduce noise transmission, optimizing the vehicle body structure to increase rigidity, improving suspension vibration, etc.
However, due to the existence of the NVH target, the switching frequency and the harmonic injection function need to function normally, so if the condition triggering the NVH target to change exists, the switching frequency and the harmonic injection function can be adjusted to improve the efficiency of the electric driving system.
In the embodiment of the invention, if the sound level in the vehicle is too high, i.e. the environmental sound in the vehicle is greater than the noise specified by the NVH target, the switching frequency and the harmonic injection function set according to the NVH target can be not continued, and the switching frequency and the harmonic injection function can be adjusted so as to further achieve the aim of improving the efficiency of the electric drive system; if the electric quantity of the whole vehicle is insufficient and only has a small difference from the electric quantity required for reaching the navigation destination, the range of the target vehicle can be improved to be a priority, and then the switching frequency and the harmonic injection function can be adjusted, so that the range of the target vehicle can be improved by improving the efficiency of the electric drive system.
S2, judging whether the efficiency improvement condition of the electric drive system is met or not according to the efficiency improvement judging parameter.
Referring to fig. 2, in an embodiment of the present invention, when the efficiency improvement determining parameter is an in-vehicle environmental sound of the target vehicle, the determining whether the efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement determining parameter includes:
s21, performing spectral feature analysis on the in-vehicle environmental sound to obtain environmental sound characteristics;
s22, judging whether the sound volume level in the environmental sound characteristic is larger than a vehicle NVH target;
when the sound volume level in the environmental sound characteristic is greater than the NVH target of the whole vehicle, S23 is executed to indicate that the efficiency improvement condition of the electric drive system is met;
and when the sound volume level in the environmental sound characteristic is smaller than or equal to the NVH target of the whole vehicle, executing S24 to indicate that the efficiency improvement condition of the electric drive system is not met.
In detail, the performing spectral feature analysis on the in-vehicle environmental sound to obtain environmental sound characteristics includes:
performing smoothing processing on the audio signal of the in-car environment sound to obtain a standard audio signal;
performing Fourier transform calculation on the standard audio signal to obtain a frequency domain signal;
calculating the amplitude spectrum of each frequency component in the frequency domain signal;
and calculating the sound pressure level of the amplitude spectrum according to a sound pressure level formula to obtain the sound pressure level corresponding to each frequency component, and taking the sound pressure level corresponding to each frequency component as an environmental sound characteristic.
Specifically, the sound pressure level formula is expressed as:
L p ＝20*log 10 (P/P 0 )
wherein L is p Expressed as sound pressure level, P as a value in the magnitude spectrum, P 0 Represented as a preset reference sound pressure.
In the embodiment of the invention, the in-car environmental sound is obtained through the microphone and the recording equipment and used as the digital audio data, and a window function can be applied to the signal before the audio signal is subjected to Fourier transform, and the window function carries out smoothing processing on the signal in a time domain so as to reduce the frequency spectrum leakage effect in the Fourier transform; then using a Fast Fourier Transform (FFT) algorithm to carry out Fourier transform on the audio signal processed by the window function, and converting the signal from a time domain to a frequency domain, so that frequency spectrum data containing amplitude and phase information of each frequency component is obtained; further, the energy distribution of each frequency component can be obtained by calculating the magnitude spectrum of the fourier transform result, the magnitude spectrum representing the energy of the signal at different frequencies; calculating the sound pressure level of the amplitude of each frequency component by using a sound pressure level formula to obtain the sound pressure level corresponding to each frequency component; wherein the sound pressure level is non-linear in decibels (dB).
In the embodiment of the invention, if the collected in-vehicle environmental sound is greater than the noise standard calibrated by the NVH target of the whole vehicle, namely the sound level in the vehicle is too high, the switching frequency and the harmonic injection function set according to the NVH target can be not continued, and the efficiency improvement condition of the electric drive system is met.
Specifically, the human ear has different sound sensitivity to different frequencies, and may be provided with different sound level requirements, or total sound level requirements, for different frequencies; after the environmental sound in the vehicle is collected, the sound volume levels of different frequency bands are obtained through spectrum analysis and analysis, and the sound volume levels can be compared with sound volume level targets of different frequency bands (namely NVH targets of the whole vehicle) or the total sound volume level comparison can be carried out.
Referring to fig. 3, in an embodiment of the present invention, when the efficiency improvement determination parameter is the route information in the navigation map, the determining whether the efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement determination parameter includes:
s31, acquiring a journey destination and a current position in the journey information;
s32, analyzing power consumption of the vehicle according to the current position and the travel destination to obtain required electric quantity;
s33, judging whether the residual electric quantity of the target vehicle is smaller than the required electric quantity or not;
when the remaining capacity of the target vehicle is less than or equal to the required capacity, then executing S34 to indicate that an efficiency improvement condition of the electric drive system is satisfied;
when the remaining capacity of the target vehicle is greater than the required capacity, S35 is executed to indicate that the efficiency improvement condition of the electric drive system is not satisfied.
In the embodiment of the invention, the required cruising mileage (taking hundred kilometers as a unit) can be calculated through the current position and the travel destination, and the required electric quantity can be obtained through the adjustment coefficient of the required cruising mileage by averaging hundred kilometers of energy consumption; the adjustment coefficient depends on the ambient temperature and the residual road condition, the average hundred kilometer energy consumption of the new energy source can be 15.95 kilowatts, and the required electric quantity can be obtained through calculation according to the formula.
In the embodiment of the invention, if the acquired required electric quantity is larger than the residual electric quantity of the target vehicle (the difference between the required electric quantity and the residual electric quantity is not large), namely the electric quantity of the whole vehicle is insufficient, the cruising mileage of the target vehicle can be improved as priority, the efficiency improvement condition of the electric drive system is met, and the cruising mileage of the target vehicle is improved by improving the efficiency of the electric drive system.
In the embodiment of the invention, after the fact that the electric quantity of the whole vehicle is insufficient is determined, and the residual electric quantity of the target vehicle is smaller than the required electric quantity is determined, measures such as atmosphere light closing, entertainment accessory power consumption reducing/closing and the like can be added to achieve the purposes of reducing the power consumption and prolonging the cruising function besides the operation of corresponding efficiency improvement through the motor controller.
And S3, when the efficiency improvement condition is met, adjusting the switching frequency and the harmonic injection function of the electric drive system so as to improve the efficiency of the electric drive system.
In an embodiment of the invention, the electric drive system comprises a control unit and a motor controller, wherein:
the control unit is used for generating an efficiency improving instruction of the electric drive system when the efficiency improving condition is met;
and after receiving the efficiency improvement instruction, the motor controller adjusts the switching frequency and the harmonic injection function of the electric drive system.
In the embodiment of the present invention, the control unit may be a VCU (Vehicle Control Unit, voltage control unit), and the efficiency-improving instruction includes an efficiency-improving flag bit; when the whole vehicle is identified to meet the efficiency lifting condition, the efficiency lifting zone bit can be sent to the motor controller through the VCU, the switching frequency is adjusted, the harmonic injection function is closed, and therefore the efficiency of the electric drive system is improved.
In an embodiment of the present invention, the adjusting the switching frequency and the harmonic injection function of the electric driving system includes:
selecting a switching frequency control target value according to the efficiency improving instruction and a preset switching frequency table;
and adjusting the switching frequency according to the switching frequency control target value;
and switching the harmonic injection function according to the zone bit in the efficiency improvement instruction.
Specifically, the switching frequency adjustment may be accomplished by querying different switching frequency tables, one opening the switching frequency table to store a normal value, one opening the switching frequency table to store an efficient value (e.g., at the expense of high noise), both opening the switching frequency tables to input motor speed, and the output selection thereof is switched by an efficiency boost command; the harmonic injection function is achieved by directly completing the opening or closing of the zone bit in the efficiency improvement instruction.
In another optional embodiment of the present invention, the efficiency improvement determination parameter may be a person input instruction, where the person input instruction may be a voice instruction, a text instruction, or a button triggered instruction; if the personnel input instruction meets the instruction requirement, judging that the efficiency improvement condition of the electric drive system is met. For example, the voice command satisfies a keyword requirement, and the triggered button belongs to a trigger button or the like.
In the embodiment of the invention, the whole vehicle can save relevant target judging processes such as NVH and the like by the method, and the operation of an electric drive system is simplified.
In another alternative embodiment of the invention, the efficiency improvement command can be directly generated by triggering, and the command is directly sent to the motor controller to perform the corresponding efficiency improvement operation; or when the age of the driver is relatively high, the sensitivity to noise is reduced, so that the requirement of the NVH target is reduced adaptively, and a command is directly sent to the motor controller to perform corresponding efficiency improvement operation.
Fig. 4 is a functional block diagram of an apparatus 100 for improving efficiency of an electric drive system according to an embodiment of the present invention. Depending on the implementation, the device for improving efficiency of the electric drive system may include a decision parameter acquisition module 101, an efficiency improvement determination module 102, and an electric drive system efficiency improvement module 103. The module according to the invention, which may also be referred to as a unit, refers to a series of computer program segments, which are stored in a memory of a device for improving the efficiency of an electric drive system, and which are executed by a processor of the device for improving the efficiency of an electric drive system, and which are able to perform a fixed function.
In the present embodiment, the functions concerning the respective modules/units are as follows:
the judging parameter acquisition module 101 is configured to acquire efficiency improvement judging parameters of a target vehicle;
the efficiency improvement judging module 102 is configured to judge whether an efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement judging parameter;
the electric drive system efficiency improving module 103 is configured to adjust a switching frequency and a harmonic injection function of the electric drive system to improve efficiency of the electric drive system when the efficiency improving condition is satisfied.
In detail, each module in the device for improving efficiency of an electric driving system 100 in the embodiment of the present invention adopts the same technical means as the method for improving efficiency of an electric driving system in the drawings, and can produce the same technical effects, which are not described herein.
Fig. 5 is a schematic structural diagram of an electronic device for implementing a method for improving efficiency of an electric driving system according to an embodiment of the present invention.
The electronic device 200 may comprise a processor 201, a memory 202, a communication bus 203, and a communication interface 204, and may further comprise computer programs stored in the memory 202 and executable on the processor 201, such as programs that promote the efficiency of an electric drive system.
The processor 201 may be formed by an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or may be formed by a plurality of integrated circuits packaged with the same function or different functions, including one or more central processing units (Central Processing Unit, CPU), a microprocessor, a digital processing chip, a graphics processor, a combination of various control chips, and so on. The processor 201 is a Control Unit (Control Unit) of the electronic device, connects various components of the entire electronic device using various interfaces and lines, executes or executes programs or modules stored in the memory 202 (for example, executes programs or the like for improving efficiency of an electric drive system), and invokes data stored in the memory 202 to perform various functions of the electronic device and process data.
The memory 202 includes at least one type of readable storage medium including flash memory, a removable hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 202 may in some embodiments be an internal storage unit of the electronic device, such as a mobile hard disk of the electronic device. The memory 202 may also be an external storage device of the electronic device in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like. Further, the memory 202 may also include both internal storage units and external storage devices of the electronic device. The memory 202 may be used not only to store application software installed in an electronic device and various types of data, such as codes of programs for improving efficiency of an electric drive system, but also to temporarily store data that has been output or is to be output.
The communication bus 203 may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. The bus is arranged to enable a connection communication between the memory 202 and at least one processor 201 etc.
The communication interface 204 is used for communication between the electronic device and other devices, including network interfaces and user interfaces. Optionally, the network interface may include a wired interface and/or a wireless interface (e.g., WI-FI interface, bluetooth interface, etc.), typically used to establish a communication connection between the electronic device and other electronic devices. The user interface may be a Display (Display), an input unit such as a Keyboard (Keyboard), or alternatively a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, or the like. The display may also be referred to as a display screen or display unit, as appropriate, for displaying information processed in the electronic device and for displaying a visual user interface.
Fig. 5 shows only an electronic device with components, and it will be understood by those skilled in the art that the structure shown in fig. 5 is not limiting of the electronic device 200 and may include fewer or more components than shown, or may combine certain components, or a different arrangement of components.
For example, although not shown, the electronic device may further include a power source (such as a battery) for supplying power to the respective components, and preferably, the power source may be logically connected to the at least one processor 201 through a power management device, so that functions of charge management, discharge management, power consumption management, and the like are implemented through the power management device. The power supply may also include one or more of any of a direct current or alternating current power supply, recharging device, power failure detection circuit, power converter or inverter, power status indicator, etc. The electronic device may further include various sensors, bluetooth modules, wi-Fi modules, etc., which are not described herein.
It should be understood that the embodiments described are for illustrative purposes only and are not limited to this configuration in the scope of the patent application.
The program stored in the memory 202 of the electronic device 200 for improving the efficiency of the electric drive system is a combination of instructions which, when executed in the processor 201, may implement:
acquiring efficiency improvement judging parameters of a target vehicle;
judging whether the efficiency improvement condition of the electric drive system is met or not according to the efficiency improvement judging parameter;
and when the efficiency improvement condition is met, adjusting the switching frequency and the harmonic injection function of the electric drive system to improve the efficiency of the electric drive system.
In particular, the specific implementation method of the above instruction by the processor 201 may refer to the description of the relevant steps in the corresponding embodiment of the drawings, which is not repeated herein.
Further, the modules/units integrated with the electronic device 200 may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as a stand alone product. The computer readable storage medium may be volatile or nonvolatile. For example, the computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM).
The present invention also provides a computer readable storage medium storing a computer program which, when executed by a processor of an electronic device, can implement:
acquiring efficiency improvement judging parameters of a target vehicle;
judging whether the efficiency improvement condition of the electric drive system is met or not according to the efficiency improvement judging parameter;
and when the efficiency improvement condition is met, adjusting the switching frequency and the harmonic injection function of the electric drive system to improve the efficiency of the electric drive system.
In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus, device and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be other manners of division when actually implemented.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units can be realized in a form of hardware or a form of hardware and a form of software functional modules.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. A plurality of units or means recited in the system claims can also be implemented by means of software or hardware by means of one unit or means. The terms first, second, etc. are used to denote a name, but not any particular order.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A method of improving efficiency of an electric drive system, the method comprising:
acquiring efficiency improvement judging parameters of a target vehicle;
judging whether the efficiency improvement condition of the electric drive system is met or not according to the efficiency improvement judging parameter;
and when the efficiency improvement condition is met, adjusting the switching frequency and the harmonic injection function of the electric drive system to improve the efficiency of the electric drive system.
2. The method of claim 1, wherein when the efficiency improvement determination parameter is an in-vehicle environmental sound of the target vehicle, the determining whether an efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement determination parameter includes:
performing spectral feature analysis on the in-car environmental sound to obtain environmental sound characteristics;
judging whether the sound volume level in the environmental sound characteristic is larger than a vehicle NVH target;
when the sound volume level in the environmental sound characteristic is larger than the NVH target of the whole vehicle, the condition that the efficiency of the electric drive system is improved is met;
and when the sound volume level in the environmental sound characteristic is smaller than or equal to the NVH target of the whole vehicle, the efficiency improvement condition of the electric drive system is not met.
3. The method for improving efficiency of an electric drive system according to claim 2, wherein the performing spectral feature analysis on the in-vehicle environmental sound to obtain environmental sound characteristics includes:
performing smoothing processing on the audio signal of the in-car environment sound to obtain a standard audio signal;
performing Fourier transform calculation on the standard audio signal to obtain a frequency domain signal;
calculating the amplitude spectrum of each frequency component in the frequency domain signal;
and calculating the sound pressure level of the amplitude spectrum according to a sound pressure level formula to obtain the sound pressure level corresponding to each frequency component, and taking the sound pressure level corresponding to each frequency component as an environmental sound characteristic.
4. The method according to claim 1, wherein when the efficiency improvement determination parameter is the trip information in the navigation map, the determining whether the efficiency improvement condition of the electric drive system is satisfied according to the efficiency improvement determination parameter includes:
acquiring a journey destination and a current position in the journey information;
carrying out vehicle power consumption analysis according to the current position and the travel destination to obtain required electric quantity;
judging whether the residual electric quantity of the target vehicle is smaller than the required electric quantity or not;
when the residual electric quantity of the target vehicle is smaller than or equal to the required electric quantity, the method indicates that the efficiency improvement condition of the electric drive system is met;
and when the residual electric quantity of the target vehicle is larger than the required electric quantity, the efficiency improvement condition of the electric drive system is not met.
5. The method of increasing efficiency of an electric drive system of claim 1, wherein the electric drive system comprises a control unit and a motor controller, wherein:
the control unit is used for generating an efficiency improving instruction of the electric drive system when the efficiency improving condition is met;
and after receiving the efficiency improvement instruction, the motor controller adjusts the switching frequency and the harmonic injection function of the electric drive system.
6. The method of claim 5, wherein said adjusting the switching frequency and harmonic injection function of the electric drive system comprises:
selecting a switching frequency control target value according to the efficiency improving instruction and a preset switching frequency table;
and adjusting the switching frequency according to the switching frequency control target value;
and switching the harmonic injection function according to the zone bit in the efficiency improvement instruction.
7. The method of claim 1, wherein the efficiency boost determination parameter is a human input command; the personnel input instruction comprises a voice instruction, a text instruction or a button triggered instruction;
if the personnel input instruction meets the instruction requirement, judging that the efficiency improvement condition is met.
8. An apparatus for improving efficiency of an electric drive system, the apparatus comprising:
the judging parameter acquisition module is used for acquiring efficiency improvement judging parameters of the target vehicle;
the efficiency improvement judging module is used for judging whether the efficiency improvement condition of the electric drive system is met according to the efficiency improvement judging parameters;
and the electric drive system efficiency improving module is used for adjusting the switching frequency and the harmonic injection function of the electric drive system when the efficiency improving condition is met so as to improve the efficiency of the electric drive system.
9. An electronic device, the electronic device comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the steps of the method of improving the efficiency of an electric drive system according to any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the method of improving the efficiency of an electric drive system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311295069.7A CN117485139A (en) | 2023-10-08 | 2023-10-08 | Method and device for improving efficiency of electric drive system, electronic equipment and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311295069.7A CN117485139A (en) | 2023-10-08 | 2023-10-08 | Method and device for improving efficiency of electric drive system, electronic equipment and storage medium |
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| CN117485139A true CN117485139A (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311295069.7A Pending CN117485139A (en) | 2023-10-08 | 2023-10-08 | Method and device for improving efficiency of electric drive system, electronic equipment and storage medium |
Country Status (1)
| Country | Link |
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| CN (1) | CN117485139A (en) |
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2023
- 2023-10-08 CN CN202311295069.7A patent/CN117485139A/en active Pending
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