CN117387962A - Method and device for testing average efficiency of electric drive assembly - Google Patents
Method and device for testing average efficiency of electric drive assembly Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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Abstract
The application provides a method and a device for testing average efficiency of an electric drive assembly, and relates to the technical field of vehicles, wherein the method comprises the following steps: testing an electric drive assembly of the vehicle by using a dynamometer bench to obtain an electric drive assembly efficiency test meter; generating a calculation electric drive assembly efficiency test table according to the electric drive assembly efficiency test table; based on the calculated electric drive assembly efficiency test table, performing simulation processing by using a vehicle simulation model to obtain an electric drive assembly working condition test table; and based on the working condition test meter of the electric drive assembly, testing the electric drive assembly by utilizing the dynamometer bench so as to determine the average efficiency of the electric drive assembly. Therefore, the torque control precision of the driving motor can be effectively ensured, the influence caused by the torque control precision of the driving motor is reduced, and the accuracy and the reliability of the average efficiency determination of the electric drive assembly are effectively improved by reducing the vehicle test deviation.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a method and a device for testing average efficiency of an electric drive assembly.
Background
With the development of computer technology, the degree of intelligence of vehicles is increasing, and the vehicle performance can be improved better by testing the efficiency of the vehicle electric drive assembly.
In the related art, when the power measuring machine bench is used for testing the electric drive assembly of the vehicle, the actual measurement efficiency of the assembly can be generally used as a judging parameter, but in the determining process of the actual measurement efficiency of the assembly, the influence caused by different torque control precision of the drive motor is not considered, so that the efficiency test accuracy of the electric drive assembly is possibly low. Therefore, how to improve the accuracy of the efficiency test of the vehicle electric drive assembly is of great importance.
Disclosure of Invention
The application provides a method and a device for testing average efficiency of an electric drive assembly.
According to a first aspect of the present application, there is provided a method of testing the average efficiency of an electric drive assembly, the method comprising: testing an electric drive assembly of the vehicle by using a dynamometer bench to obtain an electric drive assembly efficiency test meter; generating a calculation electric drive assembly efficiency test table according to the electric drive assembly efficiency test table; based on the calculated electric drive assembly efficiency test table, performing simulation processing by using a vehicle simulation model to obtain an electric drive assembly working condition test table; and based on the working condition test meter of the electric drive assembly, testing the electric drive assembly by utilizing the dynamometer bench so as to determine the average efficiency of the electric drive assembly.
In some embodiments, the testing the electric drive assembly of the vehicle with the dynamometer bench to obtain an electric drive assembly efficiency test meter includes: obtaining a test instruction, wherein the test instruction comprises the rotating speed of a dynamometer and the output torque of a driving motor; based on the test instruction, the electric drive assembly is tested by utilizing the dynamometer bench so as to obtain the rotating speed of the drive motor and the output mechanical power; determining an input efficiency of a computing assembly based on the driving motor rotational speed and the driving motor output torque; determining a computing assembly efficiency based on the output mechanical power and the computing assembly input efficiency; and generating an electric drive assembly efficiency test table based on the drive motor output torque, the drive motor rotation speed, the output mechanical power, the calculation assembly input efficiency and the calculation assembly efficiency.
In some embodiments, the generating a calculated electric drive assembly efficiency test table from the electric drive assembly efficiency test table includes: and generating a calculation electric drive assembly efficiency test table based on the rotation speed of the drive motor, the output torque of the drive motor and the calculation assembly efficiency in the electric drive assembly efficiency test table.
In some embodiments, the calculating the electric drive assembly efficiency test table based on the vehicle simulation model is used for performing simulation processing to obtain an electric drive assembly working condition test table, and the calculating comprises: determining a motor simulation model based on the type of the drive motor in the electric drive assembly; determining a non-motor part simulation model corresponding to the motor part except the driving motor part of the vehicle according to the type of the vehicle; and based on the calculated electric drive assembly efficiency test table, performing simulation processing by using a motor simulation model and the non-motor part simulation model to obtain an electric drive assembly working condition test table.
In some embodiments, the simulating process is performed by using a motor simulation model and the non-motor part simulation model based on the calculated electric drive assembly efficiency test table to obtain an electric drive assembly working condition test table, including: based on the motor simulation model and the simulation working condition type, vehicle simulation data are obtained from a database; importing the efficiency test table of the electric drive assembly for calculation into the motor simulation model, importing the vehicle simulation data into the non-motor part simulation model for simulation processing, and obtaining a simulation result; and generating an electric drive assembly working condition test table based on the simulation result.
In some embodiments, the testing the electric drive assembly with the power meter rack based on the electric drive assembly operating condition test table to determine an average efficiency of the electric drive assembly includes: according to the simulated output torque and the simulated rotating speed of the wheel end of the motor, which correspond to each moment in the working condition test table of the electric drive assembly, the driving motor and the wheel end in the electric drive assembly are controlled to finish the working condition test of the vehicle, and working condition test data are obtained; and determining the average efficiency of the electric drive assembly based on the operating condition test data.
In some embodiments, the determining the average efficiency of the electric drive assembly based on the operating condition test data includes: determining the ratio of the output energy of the dynamometer end and the input energy of the direct current bus end in the working condition test data as the average working condition efficiency of the electric drive assembly; determining the ratio of the output energy of the direct current bus end and the input energy of the dynamometer end in the working condition test data as the average efficiency of the feeding condition of the electric drive assembly; and determining the ratio of the total output energy to the total input energy as the average efficiency of the comprehensive working condition of the electric drive assembly, wherein the total output energy is the sum of the output energy of the dynamometer end and the output energy of the direct current bus end, and the total input energy is the sum of the input energy of the dynamometer end and the input energy of the direct current bus end.
According to a second aspect of the present application, there is provided a test device for the average efficiency of an electric drive assembly, comprising: the first determining module is used for testing the electric drive assembly of the vehicle by utilizing the dynamometer rack to obtain an electric drive assembly efficiency test meter; the generating module is used for generating a calculation electric drive assembly efficiency test table according to the electric drive assembly efficiency test table; the simulation module is used for performing simulation processing by using a vehicle simulation model based on the calculated electric drive assembly efficiency test table so as to obtain an electric drive assembly working condition test table; and the second determining module is used for testing the electric drive assembly by utilizing the dynamometer bench based on the electric drive assembly working condition test table so as to determine the average efficiency of the electric drive assembly.
In some embodiments, the first determining module is specifically configured to: obtaining a test instruction, wherein the test instruction comprises the rotating speed of a dynamometer and the output torque of a driving motor; based on the test instruction, the electric drive assembly is tested by utilizing the dynamometer bench so as to obtain the rotating speed of the drive motor and the output mechanical power; determining an input efficiency of a computing assembly based on the driving motor rotational speed and the driving motor output torque; determining a computing assembly efficiency based on the output mechanical power and the computing assembly input efficiency; and generating an electric drive assembly efficiency test table based on the drive motor output torque, the drive motor rotation speed, the output mechanical power, the calculation assembly input efficiency and the calculation assembly efficiency.
In some embodiments, the generating module is specifically configured to: and generating a calculation electric drive assembly efficiency test table based on the rotation speed of the drive motor, the output torque of the drive motor and the calculation assembly efficiency in the electric drive assembly efficiency test table.
In some embodiments, the simulation module comprises: a first determining unit configured to determine a motor simulation model based on a type of the driving motor in the electric driving assembly; a second determining unit for determining a non-motor part simulation model corresponding to the vehicle removed driving motor part according to the type of the vehicle; and the simulation unit is used for performing simulation processing by utilizing the motor simulation model and the non-motor part simulation model based on the calculated electric drive assembly efficiency test table so as to obtain an electric drive assembly working condition test table.
In some embodiments, the simulation unit is specifically configured to: based on the motor simulation model and the simulation working condition type, vehicle simulation data are obtained from a database; importing the efficiency test table of the electric drive assembly for calculation into the motor simulation model, importing the vehicle simulation data into the non-motor part simulation model for simulation processing, and obtaining a simulation result; and generating an electric drive assembly working condition test table based on the simulation result.
In some embodiments, the second determining module includes: the control unit is used for controlling the driving motor and the wheel end in the electric driving assembly according to the motor simulation output torque and the wheel end simulation rotating speed respectively corresponding to each moment in the electric driving assembly working condition test table so as to finish the working condition test of the vehicle and obtain working condition test data; and the third determining unit is used for determining the average efficiency of the electric drive assembly based on the working condition test data.
In some embodiments, the third determining unit is specifically configured to: determining the ratio of the output energy of the dynamometer end and the input energy of the direct current bus end in the working condition test data as the average working condition efficiency of the electric drive assembly; determining the ratio of the output energy of the direct current bus end and the input energy of the dynamometer end in the working condition test data as the average efficiency of the feeding condition of the electric drive assembly; and determining the ratio of the total output energy to the total input energy as the average efficiency of the comprehensive working condition of the electric drive assembly, wherein the total output energy is the sum of the output energy of the dynamometer end and the output energy of the direct current bus end, and the total input energy is the sum of the input energy of the dynamometer end and the input energy of the direct current bus end.
According to a third aspect of the present application, there is provided an electronic device comprising: a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements any of the methods for testing the average efficiency of the electric drive assembly described above.
According to a fourth aspect of the present application, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement a method of testing the average efficiency of any one of the above-mentioned electric drive assemblies.
In summary, the method and the device for testing the average efficiency of the electric drive assembly provided by the application have at least the following beneficial effects: the electric drive assembly of the vehicle can be tested by utilizing the power measuring machine bench to obtain an electric drive assembly efficiency test table, then the electric drive assembly efficiency test table can be generated according to the electric drive assembly efficiency test table, the electric drive assembly efficiency test table is used for calculation, the vehicle simulation model is utilized for simulation processing based on the electric drive assembly efficiency test table, so as to obtain an electric drive assembly working condition test table, and then the electric drive assembly is tested by utilizing the power measuring machine bench based on the electric drive assembly working condition test table, so that the average efficiency of the electric drive assembly is determined. Therefore, the electric drive assembly efficiency test table for calculation can be obtained by testing the electric drive assembly of the vehicle, then simulation processing is carried out to obtain the electric drive assembly working condition test table, then the electric drive assembly is tested, the average efficiency of the electric drive assembly can be determined, and the data in the electric drive assembly efficiency test table for calculation are used in the process of determining the average efficiency of the electric drive assembly, so that the torque control precision of the drive motor can be effectively ensured, the influence caused by the torque control precision of the drive motor is reduced, and the accuracy and reliability of determining the average efficiency of the electric drive assembly are effectively improved by reducing the vehicle test deviation.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for testing the average efficiency of an electric drive assembly according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for testing the average efficiency of an electric drive assembly according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a display interface according to an embodiment of the present disclosure;
FIG. 4 is a block diagram of a test apparatus for testing the average efficiency of an electric drive assembly according to an embodiment of the present application;
fig. 5 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
To further clarify the above and other features and advantages of the present application, a further description of the present application is provided below with reference to the appended drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not limiting, as to those skilled in the art.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the specific details need not be employed to practice the present application. In other instances, well-known steps or operations have not been described in detail in order to avoid obscuring the present application.
The method for testing the average efficiency of the electric drive assembly provided by the embodiment of the application can be executed by the device for testing the average efficiency of the electric drive assembly provided by the embodiment of the application, and the device can be configured in electronic equipment.
Referring to fig. 1, the present application provides a method for testing the average efficiency of an electric drive assembly, the method comprising:
and 101, testing an electric drive assembly of the vehicle by using a power measuring machine bench to obtain an electric drive assembly efficiency test meter.
The power device to be tested can be connected with the power machine by the power machine, and then various parameters of the power device can be obtained through calculation by measuring the force and displacement of the power machine side.
In addition, the electric drive assembly can comprise a motor, an electric control device, a speed reducer and other components, so that the electric drive assembly can be connected with the dynamometer machine bench in the embodiment of the application, and then the electric drive assembly can be tested by operating and controlling the electric drive assembly.
In addition, in the process of testing the electric drive assembly of the vehicle by utilizing the dynamometer bench, the electric drive assembly and components in the dynamometer bench can be measured to obtain various parameters, and then the measurement such as calculation can be performed based on the various parameters to generate an electric drive assembly efficiency test table.
It will be appreciated that the electric drive assembly efficiency test table may include a plurality of parameters, which may be data obtained by direct measurement, or may be data obtained by analysis of a received control command, a test command, or the like, or may be data obtained by performing an operation such as a calculation process on the measured data, or the like. For example, the electric drive assembly efficiency test meter may include various data such as a rotation speed of the dynamometer, a rotation speed of the driving motor, an output torque of the driving motor, and an efficiency of the calculation assembly, which is not limited in this application.
The rotation speed of the dynamometer and the output torque of the driving motor may be received input data, for example, may be data input by a user of a street hand, and the rotation speed of the dynamometer may be a given rotation speed value, or may also be referred to as a target rotation speed of the dynamometer in an ideal state, and the output torque of the driving motor may be a torque requirement of the given driving motor, that is, a target output torque of the driving motor in the ideal state, and the application is not limited thereto.
And 102, generating a calculation electric drive assembly efficiency test table according to the electric drive assembly efficiency test table.
It will be appreciated that after the electric drive assembly efficiency test chart is obtained, the electric drive assembly efficiency test chart may be processed to generate a calculated electric drive assembly efficiency test chart.
The calculation electric drive assembly efficiency test table may include a rotation speed of the drive motor, an output torque of the drive motor, and calculation assembly efficiency, or may also include other data, for example, may include other parameters in the electric drive assembly efficiency test table, which is not limited in this application.
Alternatively, the electric drive assembly efficiency test table for calculation may be generated based on the drive motor rotational speed, the drive motor output torque, and the assembly efficiency for calculation in the electric drive assembly efficiency test table.
The rotation speed of the driving motor, the output torque of the driving motor and the efficiency of the calculation assembly in the electric drive assembly efficiency test table can be directly extracted to be used as data in the calculation electric drive assembly efficiency test table. Or the rotation speed of the driving motor, the output torque of the driving motor and the efficiency of the calculation assembly in the electric driving assembly efficiency test table can be extracted first, then the driving motor, the output torque of the driving motor and the efficiency of the calculation assembly can be processed, for example, abnormal data and the like in the driving motor, can be removed, and then the remaining data are used as the content in the calculation electric driving assembly efficiency test table.
The above examples are merely illustrative, and are not intended to limit the manner in which the electric drive assembly efficiency test table for calculation is generated in the embodiment of the present application.
And 103, based on the calculated electric drive assembly efficiency test table, performing simulation processing by using a vehicle simulation model to obtain an electric drive assembly working condition test table.
The vehicle simulation model may be any model capable of performing simulation on a vehicle, and the vehicle simulation model may include a plurality of model components, for example, a motor simulation model, an accelerator pedal simulation model, a brake pedal simulation model, and the like, which is not limited in this application.
In addition, the data in the efficiency test table of the electric drive assembly can be used as input data of a vehicle simulation model and input into the vehicle simulation model for simulation processing, so that various parameters after the simulation processing can be obtained, and then the electric drive assembly working condition test table can be generated based on the various parameters after the simulation processing.
In addition, when the simulation processing is performed by using the vehicle simulation model based on the calculated electric drive assembly efficiency test table, the simulation processing of various working condition types can be performed, for example, the simulation processing can be performed by a chinese light vehicle test cycle (china light vehicle test cycle, CLTC), a world light vehicle test cycle working condition (world light vehicle test cycle, WLTC), a new european driving cycle (new European driving cycle, NEDC), and the like, which is not limited in the present application.
Therefore, in the embodiment of the application, when the vehicle simulation model is subjected to simulation processing, data such as the rotation speed of the driving motor and the output torque of the driving motor in the electric driving assembly efficiency table are fully considered, and the simulation processing is not performed by using the efficiency test data of the speed reducer, so that the influence of the torque control precision of the driving motor on the precision of a simulation result is greatly reduced, the determined working condition test table of the electric driving assembly is more accurate and reliable, and further, the guarantee is provided for improving the accuracy of subsequent processing.
Step 104, testing the electric drive assembly by using a dynamometer bench based on the working condition test meter of the electric drive assembly to determine the average efficiency of the electric drive assembly.
When the electric drive assembly is tested based on the electric drive assembly working condition test meter, the used dynamometer machine bench and the dynamometer machine bench in the process of obtaining the electric drive assembly efficiency test meter can be the same bench.
It can be appreciated that in the embodiment of the application, the vehicle simulation model is utilized to perform simulation processing based on the calculation electric drive assembly efficiency test table, so that a relatively accurate and reliable electric drive assembly working condition test table can be obtained, then the electric drive assembly is tested by utilizing the dynamometer bench according to the data such as the motor simulation output torque and the wheel end simulation rotating speed which correspond to each moment in the electric drive assembly working condition test table, so that the determined average efficiency of the electric drive assembly is more reliable and accurate, namely, the vehicle test deviation can be effectively reduced by correlating the motor simulation output torque and the driving motor output torque at each moment, the accuracy of the electric drive assembly circulation working condition average efficiency test is further effectively improved, and conditions are provided for the accurate development of the follow-up electric drive assembly.
According to the embodiment of the application, the electric drive assembly of the vehicle can be tested by the power measuring machine bench to obtain the electric drive assembly efficiency test table, then the electric drive assembly efficiency test table can be generated according to the electric drive assembly efficiency test table, the electric drive assembly efficiency test table is used for calculation, the vehicle simulation model is used for simulation processing based on the electric drive assembly efficiency test table, so that the electric drive assembly working condition test table is obtained, and then the electric drive assembly is tested by the power measuring machine bench based on the electric drive assembly working condition test table, so that the average efficiency of the electric drive assembly is determined. Therefore, the electric drive assembly efficiency test table for calculation can be obtained by testing the electric drive assembly of the vehicle, then simulation processing is carried out to obtain the electric drive assembly working condition test table, then the electric drive assembly is tested, the average efficiency of the electric drive assembly can be determined, and the data in the electric drive assembly efficiency test table for calculation are used in the process of determining the average efficiency of the electric drive assembly, so that the torque control precision of the drive motor can be effectively ensured, the influence caused by the torque control precision of the drive motor is reduced, and the accuracy and reliability of determining the average efficiency of the electric drive assembly are effectively improved by reducing the vehicle test deviation.
As shown in fig. 2, the method for testing the average efficiency of the electric drive assembly may include the following steps:
step 201, testing an electric drive assembly of a vehicle by using a power measuring machine bench to obtain an electric drive assembly efficiency test table.
Alternatively, the test command may be obtained first, then the electric drive assembly is tested by using the dynamometer bench based on the test command to obtain the rotation speed and the output mechanical power of the drive motor, then the input efficiency of the calculation assembly is determined based on the rotation speed and the output torque of the drive motor, the input efficiency of the calculation assembly is determined based on the output mechanical power and the input efficiency of the calculation assembly, and the electric drive assembly efficiency test table is generated based on the output torque of the drive motor, the rotation speed of the drive motor, the output mechanical power, the input efficiency of the calculation assembly and the efficiency of the calculation assembly.
The test instruction may include a rotation speed of the dynamometer and an output torque of the driving motor, which may be an instruction input by a user, or may also be an instruction sent by an upper computer, and the application is not limited thereto.
It can be understood that, because the electric drive assembly includes a motor, a speed reducer, and the like, in the process of testing the electric drive assembly by using the dynamometer bench based on the test instruction, the rotation speed of the dynamometer and the rotation speed of the driving motor can be used as inputs, then the rotation speed of the dynamometer and the operation of the electric drive assembly are controlled, and then the measurement is performed to obtain the rotation speed of the driving motor and the output mechanical power.
In addition, the following relationship can be satisfied between the input power of the assembly for calculation and the rotation speed and output torque of the driving motor: calculation of total input power = drive motor speed drive motor output torque.
The following relationship may be satisfied between the calculation-use assembly efficiency and the output mechanical power, and the calculation-use assembly input efficiency: calculation efficiency = output mechanical power/calculation input power.
Therefore, in the embodiment of the application, the input power of the calculation assembly can be determined through the rotation speed of the driving motor and the output torque of the driving motor, and then the efficiency of the calculation assembly can be determined based on the output mechanical power and the input efficiency of the calculation assembly, namely, in the process of determining the efficiency of the calculation assembly, the input efficiency of the calculation assembly is not the actual measurement efficiency of other assemblies, and the like, so that the precision influence of subsequent processing caused by the torque control precision of the driving motor can be effectively reduced.
Alternatively, the actual rotational speed of the dynamometer may be measured after the electric drive assembly of the vehicle is tested using the dynamometer bench. For example, the electric drive assembly may include a driving motor, a speed reducer, and other components, where two half shafts output by the speed reducer are respectively connected with two wheels, so that the rotation speed of the wheel end can be measured, and for convenience, the rotation speed of the wheel end may be simply referred to as rotation speed 1 of the dynamometer, rotation speed 2 of the dynamometer, and so on. The present application is not limited in this regard.
Step 202, generating a calculation electric drive assembly efficiency test table based on the rotation speed of the drive motor, the output torque of the drive motor and the calculation assembly efficiency in the electric drive assembly efficiency test table.
Step 203, determining a motor simulation model based on the type of the driving motor in the electric drive assembly.
The driving motors can be of various types, and the motor simulation models corresponding to the driving motors of various types can be the same or different.
It will be appreciated that a large number of motor simulation models may be stored in the motor simulation model library, each motor simulation model corresponding to the type of drive motor in actual use. Therefore, in the embodiment of the present application, based on the type of the driving motor in the electric driving assembly, a search may be performed in the motor simulation model library to determine a motor simulation model corresponding to the type of the driving motor, which is not limited in this application.
And 204, determining a non-motor part simulation model corresponding to the motor part of the vehicle except the driving motor according to the type of the vehicle.
The simulation model of the non-motor part can be a simulation model corresponding to any part except the driving motor in the vehicle, such as an accelerator pedal model, a brake pedal model, an air conditioner model and the like. A large number of non-motor part simulation models can be arranged in the simulation model library, and each non-motor part simulation model can have a certain association relation with the type of the vehicle, so that the application is not limited.
In addition, the vehicles may be of various types, such as cars, off-road vehicles, sports cars, etc., and the corresponding simulation models of the non-motor parts may be the same or different, which is not limited in this application.
It can be understood that the non-motor part simulation model and the like corresponding to the vehicle type can be determined by searching in the simulation model library according to the vehicle type, so that the determination of the non-motor part simulation model is more accurate and reliable, and conditions are provided for ensuring the accuracy of the follow-up simulation processing.
Step 205, based on the calculated electric drive assembly efficiency test table, performing simulation processing by using the motor simulation model and the non-motor part simulation model to obtain an electric drive assembly working condition test table.
It can be understood that the electric drive assembly efficiency test table can be used as input data of a motor simulation model and a non-motor part simulation model, then the motor simulation model and the non-motor part simulation model are subjected to simulation processing, namely, a vehicle is subjected to simulation processing, and then the electric drive assembly working condition test table can be generated according to simulation results.
Alternatively, vehicle simulation data may be obtained from the database based on the motor simulation model and the simulation condition type, and then the calculated electric drive assembly efficiency test table may be imported into the motor simulation model, and the vehicle simulation data may be imported into the non-motor part simulation model to perform simulation processing, so as to obtain a simulation result, and then the electric drive assembly condition test table may be generated based on the simulation result.
The simulation working condition type may be various, for example, CLTC, WLTC, NEDC, etc., which is not limited in this application.
In addition, the vehicle simulation data may be understood as input data corresponding to the simulation model of the non-motor portion during the simulation processing, and may be default data, historical vehicle operation data, vehicle operation data obtained by processing and predicting the historical data, or the like, which is not limited in this application.
It will be appreciated that the motor simulation models may be different, and the corresponding vehicle simulation data may be the same or may be different; the simulation conditions may be of different types and the corresponding vehicle simulation data may be the same or may be different. Therefore, in the embodiment of the application, the vehicle simulation data can be obtained from the database based on the motor simulation model and the simulation working condition type, so that the determined vehicle simulation data is more accurate and reliable.
In addition, when the test table for calculating the efficiency of the electric drive assembly is imported into the motor simulation model, the display interface can have various conditions. For example, in the schematic diagram shown in fig. 3, "a" may represent the current driving motor rotation speed, "b" may represent the driving motor output torque, "c" may represent the calculation efficiency, and the left table may represent the driving motor output torque on the horizontal axis and the calculation efficiency on the vertical axis.
The foregoing examples are merely illustrative, and are not intended to limit the content, style, etc. of the display interface in the embodiments of the present application.
And 206, controlling the driving motor and the wheel end in the electric drive assembly according to the simulated output torque and the simulated rotating speed of the wheel end of the motor, which correspond to each moment in the working condition test table of the electric drive assembly, so as to finish the working condition test of the vehicle and obtain working condition test data.
The electric drive assembly working condition test table may include a motor simulation output torque and a wheel end simulation rotation speed, which respectively correspond to each moment, for example, as shown in the following table 1.
TABLE 1
In addition, since the driving motor, the speed reducer, and the like in the electric drive assembly, the output end of the speed reducer may be connected to the wheel of the vehicle, respectively, so that the wheel end may be understood as the wheel portion connected to the output end of the speedometer, and the like in the electric drive assembly, the present application is not limited thereto.
In addition, the working condition test data can be understood to be the parameter state corresponding to the driving motor, the speed reducer and other parts currently after the working condition test of the vehicle is completed, and the parameter state can be obtained through measurement or can also be obtained through calculation processing of the measurement data, and the like, and the working condition test data is not limited in the application.
For example, if the electric drive assembly operating condition test table is shown in table 1, it can be seen from table 1 that at time 0, the motor simulates the output torque and the wheel end simulation rotation speed; at 0.1 seconds, the simulated output torque of the motor is 58.7Nm, and the simulated rotating speed of the wheel end is 0.9rpm; at 0.2 seconds, the simulated output torque of the motor is 84.4Nm, and the simulated rotating speed of the wheel end is 3.5rpm; at 0.3 seconds, the simulated output torque of the motor is 81.5Nm, and the simulated rotating speed of the wheel end is 6.4rpm; at 0.4 seconds, the simulated output torque of the motor is 73.9Nm, and the simulated rotating speed of the wheel end is 9.0rpm; at 0.5 seconds, the motor simulation output torque was 68.3Nm and the wheel end simulation speed was 11.4rpm … …. And then the driving motor and the wheel end in the electric drive assembly can be controlled sequentially according to the simulated output torque and the simulated rotating speed of the motor and the simulated rotating speed of the wheel end, which correspond to the moments in the table 1. For example, at 0.1s, the torque of the drive motor may be controlled to 58.7Nm, and the wheel end rotational speed may be controlled to 0.9rpm; at 0.2s, the torque of the drive motor may be controlled to 84.4Nm, the wheel end speed to 3.5rpm, etc. The data in table 1 is only a schematic illustration, and is not intended to limit the values, correspondence, etc. of the motor simulation output torque and the wheel end simulation rotational speed at each time in the embodiment of the present application.
Step 207, determining the average efficiency of the electric drive assembly based on the operating condition test data.
Alternatively, the ratio between the output energy of the dynamometer end and the input energy of the direct current bus end in the working condition test data can be determined to be the driving working condition average efficiency of the electric drive assembly, the ratio between the output energy of the direct current bus end and the input energy of the dynamometer end in the test data can be determined to be the feeding condition average efficiency of the electric drive assembly, and the ratio between the total output energy and the total input energy can be determined to be the comprehensive working condition average efficiency of the electric drive assembly.
The total output energy is understood as the sum of the output energy of the dynamometer end and the output energy of the direct current bus end, and the total input energy is understood as the sum of the input energy of the dynamometer end and the input energy of the direct current bus end.
It can be understood that the working condition test data can include output energy of the dynamometer end, input energy of the direct current bus, output energy of the direct current bus, and the like, and can be obtained through measurement, calculation of the measurement data, and the like. And then the output energy of the dynamometer end, the input energy of the direct current bus, the output energy of the direct current bus and the like can be processed to determine the average efficiency of the electric drive assembly. Therefore, in the embodiment of the application, the efficiency of the calculation assembly can be determined based on the output rotating speed of the driving motor, the rotating speed of the driving motor and the output mechanical power, so that the influence of the torque control precision of the driving motor on the result precision is reduced. And then, the efficiency of the assembly for calculation is used for simulation processing, so that more accurate and reliable working condition test data can be determined, and further, the accuracy and reliability of determining the average efficiency of the electric drive assembly can be effectively improved.
According to the embodiment of the application, the electric drive assembly of the vehicle can be tested by utilizing the power measuring machine bench to obtain the electric drive assembly efficiency test table, then the electric drive assembly efficiency test table is generated based on the rotation speed of the drive motor, the output torque of the drive motor and the calculation assembly efficiency in the electric drive assembly efficiency test table, then the motor simulation model can be determined based on the type of the drive motor in the electric drive assembly, the non-motor part simulation model corresponding to the drive motor part is removed from the vehicle according to the type of the vehicle, then the simulation processing is carried out based on the calculation electric drive assembly efficiency test table by utilizing the motor simulation model and the non-motor part simulation model to obtain the electric drive assembly working condition test table, then the drive motor and the wheel end in the electric drive assembly can be controlled according to the motor simulation output torque and the wheel end simulation rotation speed respectively corresponding to each moment in the electric drive assembly working condition test table, so that the working condition test of the vehicle is completed, the working condition test data is obtained, and the average efficiency of the electric drive assembly is determined based on the working condition test data. Therefore, the electric drive assembly efficiency test table for calculation can be obtained by testing the electric drive assembly of the vehicle, then simulation processing is carried out to obtain the electric drive assembly working condition test table, then the electric drive assembly is tested, the average efficiency of the electric drive assembly can be determined, and the data in the electric drive assembly efficiency test table for calculation are used in the process of determining the average efficiency of the electric drive assembly, so that the torque control precision of the drive motor can be effectively ensured, the influence caused by the torque control precision of the drive motor is reduced, and the accuracy and reliability of determining the average efficiency of the electric drive assembly are effectively improved by reducing the vehicle test deviation.
According to the present application, there is provided a test apparatus for an average efficiency of an electric drive assembly, as shown in fig. 4, the apparatus includes a first determining module 410, a generating module 420, a simulating module 430, and a second determining module 440.
The first determining module 410 is configured to test an electric drive assembly of the vehicle by using the dynamometer bench, so as to obtain an electric drive assembly efficiency test table; the generating module 420 is configured to generate a calculated electric drive assembly efficiency test table according to the electric drive assembly efficiency test table; the simulation module 430 is configured to perform a simulation process by using a vehicle simulation model based on the calculated electric drive assembly efficiency test table, so as to obtain an electric drive assembly working condition test table; the second determining module 440 is configured to test the electric drive assembly with the power meter rack based on the electric drive assembly operating condition test table, so as to determine an average efficiency of the electric drive assembly.
In some embodiments, the first determining module 410 is specifically configured to: obtaining a test instruction, wherein the test instruction comprises the rotating speed of a dynamometer and the output torque of a driving motor; based on the test instruction, the electric drive assembly is tested by utilizing the dynamometer bench so as to obtain the rotating speed of the drive motor and the output mechanical power; determining an input efficiency of a computing assembly based on the driving motor rotational speed and the driving motor output torque; determining a computing assembly efficiency based on the output mechanical power and the computing assembly input efficiency; and generating an electric drive assembly efficiency test table based on the drive motor output torque, the drive motor rotation speed, the output mechanical power, the calculation assembly input efficiency and the calculation assembly efficiency.
In some embodiments, the generating module 420 is specifically configured to: and generating a calculation electric drive assembly efficiency test table based on the rotation speed of the drive motor, the output torque of the drive motor and the calculation assembly efficiency in the electric drive assembly efficiency test table.
In some embodiments, the simulation module 430 includes: the first determining unit is used for determining a motor simulation model based on the type of the driving motor in the electric driving assembly; the second determining unit is used for determining a non-motor part simulation model corresponding to the motor part of the vehicle except the driving motor according to the type of the vehicle; the simulation unit is used for performing simulation processing by utilizing the motor simulation model and the non-motor part simulation model based on the calculated electric drive assembly efficiency test table so as to obtain an electric drive assembly working condition test table.
In some embodiments, the simulation unit is specifically configured to: based on the motor simulation model and the simulation working condition type, vehicle simulation data are obtained from a database; importing the efficiency test table of the electric drive assembly for calculation into the motor simulation model, importing the vehicle simulation data into the non-motor part simulation model for simulation processing, and obtaining a simulation result; and generating an electric drive assembly working condition test table based on the simulation result.
In some embodiments, the second determining module 440 includes: the control unit is used for controlling the driving motor and the wheel end in the electric driving assembly according to the motor simulation output torque and the wheel end simulation rotating speed respectively corresponding to each moment in the electric driving assembly working condition test table so as to finish the working condition test of the vehicle and obtain working condition test data; and the third determining unit is used for determining the average efficiency of the electric drive assembly based on the working condition test data.
In some embodiments, the third determining unit is specifically configured to: determining the ratio of the output energy of the dynamometer end and the input energy of the direct current bus end in the working condition test data as the average working condition efficiency of the electric drive assembly; determining the ratio of the output energy of the direct current bus end and the input energy of the dynamometer end in the working condition test data as the average efficiency of the feeding condition of the electric drive assembly; and determining the ratio of the total output energy to the total input energy as the average efficiency of the comprehensive working condition of the electric drive assembly, wherein the total output energy is the sum of the output energy of the dynamometer end and the output energy of the direct current bus end, and the total input energy is the sum of the input energy of the dynamometer end and the input energy of the direct current bus end.
According to the test device for the average efficiency of the electric drive assembly, the electric drive assembly of the vehicle can be tested by the power measuring machine rack to obtain the electric drive assembly efficiency test table, then the electric drive assembly efficiency test table can be generated according to the electric drive assembly efficiency test table, the electric drive assembly efficiency test table is used for calculation, the vehicle simulation model is utilized for simulation processing based on the electric drive assembly efficiency test table for calculation, so that the electric drive assembly working condition test table is obtained, and then the electric drive assembly is tested by the power measuring machine rack based on the electric drive assembly working condition test table to determine the average efficiency of the electric drive assembly. Therefore, the electric drive assembly efficiency test table for calculation can be obtained by testing the electric drive assembly of the vehicle, then simulation processing is carried out to obtain the electric drive assembly working condition test table, then the electric drive assembly is tested, the average efficiency of the electric drive assembly can be determined, and the data in the electric drive assembly efficiency test table for calculation are used in the process of determining the average efficiency of the electric drive assembly, so that the torque control precision of the drive motor can be effectively ensured, the influence caused by the torque control precision of the drive motor is reduced, and the accuracy and reliability of determining the average efficiency of the electric drive assembly are effectively improved by reducing the vehicle test deviation.
It will be appreciated that the specific features, operations and details described herein before with respect to the methods of the present application may also be similarly applied to the devices and systems of the present application, or vice versa. Additionally, each step of the methods of the present application described above may be performed by a corresponding component or unit of the apparatus or system of the present application.
It is to be understood that the various modules/units of the apparatus of the present application may be implemented in whole or in part by software, hardware, firmware, or a combination thereof. Each module/unit may be embedded in a processor of the electronic device in hardware or firmware or may be independent of the processor, or may be stored in a memory of the electronic device in software for the processor to call to perform the operations of each module/unit. Each module/unit may be implemented as a separate component or module, or two or more modules/units may be implemented as a single component or module.
As shown in fig. 5, the present application provides an electronic device 500 comprising a processor 501 and a memory 502 storing computer program instructions. Wherein the processor 501, when executing the computer program instructions, implements the steps of the method for testing the average efficiency of the electric drive assembly described above. The electronic device 500 may be broadly a server, a terminal, or any other electronic device having the necessary computing and/or processing capabilities.
In one embodiment, the electronic device 500 may include a processor, memory, network interface, communication interface, etc. connected by a system bus. The processor of the electronic device 500 may be used to provide the necessary computing, processing, and/or control capabilities. The memory of the electronic device 500 may include non-volatile storage media and internal memory. The non-volatile storage medium may store an operating system, computer programs, and the like. The internal memory may provide an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface and communication interface of the electronic device 500 may be used to connect and communicate with external devices via a network. Which when executed by a processor performs the steps of the methods of the present application.
The application provides a computer readable storage medium, wherein computer program instructions are stored on the computer readable storage medium, and when the computer program instructions are executed by a processor, the method for testing the average efficiency of the electric drive assembly is realized.
Those of skill in the art will appreciate that the method steps of the present application may be performed by a computer program to instruct related hardware such as the electronic device 500 or the processor, the computer program may be stored in a non-transitory computer readable storage medium, which when executed causes the steps of the present application to be performed. Any reference herein to memory, storage, or other medium may include non-volatile or volatile memory, as the case may be. Examples of nonvolatile memory include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage, hard disk, solid state disk, and the like. Examples of volatile memory include Random Access Memory (RAM), external cache memory, and the like.
The technical features described above may be arbitrarily combined. Although not all possible combinations of features are described, any combination of features should be considered to be covered by the description provided that such combinations are not inconsistent.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method for testing the average efficiency of an electric drive assembly, comprising:
testing an electric drive assembly of the vehicle by using a dynamometer bench to obtain an electric drive assembly efficiency test meter;
generating a calculation electric drive assembly efficiency test table according to the electric drive assembly efficiency test table;
based on the calculated electric drive assembly efficiency test table, performing simulation processing by using a vehicle simulation model to obtain an electric drive assembly working condition test table;
And based on the working condition test meter of the electric drive assembly, testing the electric drive assembly by utilizing the dynamometer bench so as to determine the average efficiency of the electric drive assembly.
2. The method for testing the average efficiency of the electric drive assembly according to claim 1, wherein the step of testing the electric drive assembly of the vehicle by using the dynamometer bench to obtain an electric drive assembly efficiency test table comprises the steps of:
obtaining a test instruction, wherein the test instruction comprises the rotating speed of a dynamometer and the output torque of a driving motor;
based on the test instruction, the electric drive assembly is tested by utilizing the dynamometer bench so as to obtain the rotating speed of the drive motor and the output mechanical power;
determining an input efficiency of a computing assembly based on the driving motor rotational speed and the driving motor output torque;
determining a computing assembly efficiency based on the output mechanical power and the computing assembly input efficiency;
and generating an electric drive assembly efficiency test table based on the drive motor output torque, the drive motor rotation speed, the output mechanical power, the calculation assembly input efficiency and the calculation assembly efficiency.
3. A method of testing the average efficiency of an electric drive assembly as set forth in claim 2, wherein said generating a calculated electric drive assembly efficiency test table from said electric drive assembly efficiency test table includes:
And generating a calculation electric drive assembly efficiency test table based on the rotation speed of the drive motor, the output torque of the drive motor and the calculation assembly efficiency in the electric drive assembly efficiency test table.
4. The method for testing the average efficiency of the electric drive assembly according to claim 2, wherein the step of performing simulation processing by using a vehicle simulation model based on the calculated electric drive assembly efficiency test table to obtain an electric drive assembly operating condition test table comprises the steps of:
determining a motor simulation model based on the type of the drive motor in the electric drive assembly;
determining a non-motor part simulation model corresponding to the motor part except the driving motor part of the vehicle according to the type of the vehicle;
and based on the calculated electric drive assembly efficiency test table, performing simulation processing by using a motor simulation model and the non-motor part simulation model to obtain an electric drive assembly working condition test table.
5. The method for testing the average efficiency of the electric drive assembly according to claim 4, wherein the step of performing simulation processing by using a motor simulation model and the non-motor part simulation model based on the calculated electric drive assembly efficiency test table to obtain an electric drive assembly working condition test table comprises the steps of:
Based on the motor simulation model and the simulation working condition type, vehicle simulation data are obtained from a database;
importing the efficiency test table of the electric drive assembly for calculation into the motor simulation model, importing the vehicle simulation data into the non-motor part simulation model for simulation processing, and obtaining a simulation result;
and generating an electric drive assembly working condition test table based on the simulation result.
6. The method for testing the average efficiency of the electric drive assembly according to claim 1, wherein the testing the electric drive assembly by using the dynamometer bench based on the electric drive assembly operating condition test table to determine the average efficiency of the electric drive assembly comprises:
according to the simulated output torque and the simulated rotating speed of the wheel end of the motor, which correspond to each moment in the working condition test table of the electric drive assembly, the driving motor and the wheel end in the electric drive assembly are controlled to finish the working condition test of the vehicle, and working condition test data are obtained;
and determining the average efficiency of the electric drive assembly based on the operating condition test data.
7. The method of testing the average efficiency of an electric drive assembly of claim 6, wherein determining the average efficiency of the electric drive assembly based on the operating condition test data comprises:
Determining the ratio of the output energy of the dynamometer end and the input energy of the direct current bus end in the working condition test data as the average working condition efficiency of the electric drive assembly;
determining the ratio of the output energy of the direct current bus end and the input energy of the dynamometer end in the working condition test data as the average efficiency of the feeding condition of the electric drive assembly;
and determining the ratio of the total output energy to the total input energy as the average efficiency of the comprehensive working condition of the electric drive assembly, wherein the total output energy is the sum of the output energy of the dynamometer end and the output energy of the direct current bus end, and the total input energy is the sum of the input energy of the dynamometer end and the input energy of the direct current bus end.
8. A test device for the average efficiency of an electric drive assembly, comprising:
the first determining module is used for testing the electric drive assembly of the vehicle by utilizing the dynamometer rack to obtain an electric drive assembly efficiency test meter;
the generating module is used for generating a calculation electric drive assembly efficiency test table according to the electric drive assembly efficiency test table;
the simulation module is used for performing simulation processing by using a vehicle simulation model based on the calculated electric drive assembly efficiency test table so as to obtain an electric drive assembly working condition test table;
And the second determining module is used for testing the electric drive assembly by utilizing the dynamometer bench based on the electric drive assembly working condition test table so as to determine the average efficiency of the electric drive assembly.
9. An electronic device, wherein the electrons comprise: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a method for testing the average efficiency of an electric drive assembly according to any one of claims 1-7.
10. A computer readable storage medium, having stored thereon computer program instructions which, when executed by a processor, implement a method of testing the average efficiency of an electric drive assembly according to any one of claims 1-7.
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