CN108983095B - Method and device for testing reliability of driving motor system - Google Patents
Method and device for testing reliability of driving motor system Download PDFInfo
- Publication number
- CN108983095B CN108983095B CN201810842166.6A CN201810842166A CN108983095B CN 108983095 B CN108983095 B CN 108983095B CN 201810842166 A CN201810842166 A CN 201810842166A CN 108983095 B CN108983095 B CN 108983095B
- Authority
- CN
- China
- Prior art keywords
- test point
- curve
- negative
- positive power
- running time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The invention provides a method and a device for testing the reliability of a driving motor system, wherein the method for testing the reliability of the driving motor system comprises the following steps: acquiring a first curve of speed and time of the vehicle under each working condition, and determining a second curve of rotating speed and torque under each working condition; according to each working condition of the vehicle, dividing a plurality of positive power areas and a plurality of negative power areas according to a second curve, and counting the proportion of the part of the second curve contained in each area; selecting at least one positive power area from the plurality of positive power areas, obtaining a positive power test point on a second curve contained in each selected positive power area, and calculating to obtain the positive power running time corresponding to each positive power test point; similarly, negative work test points are also obtained, and the negative work running time corresponding to each negative work test point is calculated; and testing the driving motor system according to the obtained test points and the running time, so that the complexity of a control mode in the reliability test process of the driving motor system is reduced.
Description
Technical Field
The invention relates to the field of driving motor systems, in particular to a method and a device for testing reliability of a driving motor system.
Background
The driving motor system is an important component of a power system on a vehicle and directly influences the safety of the vehicle. At present, a driving motor system for an electric automobile carries out reliability tests on a rack, wherein the reliability tests meet the specifications and a reliability evaluation method is included. And the reliability test is performed using a predetermined rotation speed and a variation torque.
However, the control mode adopted in the reliability test process is complex, so that the reliability test is limited, and the high-speed working condition of the vehicle is not considered.
Disclosure of Invention
The invention provides a method and a device for testing the reliability of a driving motor system, which are used for solving the problems that the control mode is complex and the high-speed working condition of a vehicle is not considered in the reliability test process of the existing driving motor system.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to an aspect of the present invention, there is provided a method for testing reliability of a driving motor system, including:
obtaining a first curve of vehicle speed and time under each working condition of a vehicle, wherein the working condition of the vehicle comprises: suburb conditions, urban conditions and high-speed conditions;
determining a second curve of the rotating speed and the torque under each working condition according to the first curve;
according to each working condition of the vehicle, dividing a plurality of positive work areas for the vehicle to do positive work and a plurality of negative work areas for the vehicle to do negative work according to the second curve, and counting the proportion of the part of the second curve contained in each area;
according to each working condition of the vehicle, selecting at least one positive power area from a plurality of positive power areas for the vehicle to do positive power according to the proportion, obtaining a positive power test point on the second curve contained in each selected positive power area, and calculating the positive power running time corresponding to each positive power test point according to the sum of the positive power test points and the positive power done by the vehicle;
selecting at least one negative work area from a plurality of negative work areas for the vehicle to work according to the proportion, obtaining a negative work test point on the second curve contained in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work of the vehicle;
and running each positive power test point under suburb working conditions for corresponding positive power running time, running each negative power test point for corresponding negative power running time, running each positive power test point under urban working conditions for corresponding positive power running time, running each negative power test point for corresponding negative power running time, running each positive power test point under high-speed working conditions for corresponding positive power running time, and running each negative power test point for corresponding negative power running time to form a test period, and testing the driving motor system for a plurality of test periods.
Further, the step of determining a second curve of speed and torque for each operating condition based on the first curve comprises:
obtaining a third curve of acceleration and time and a fourth curve of rotating speed and time under each working condition according to the first curve and the conversion parameters;
obtaining a fifth curve of the torque and the time under each working condition according to the third curve;
and obtaining a second curve of the rotating speed and the torque under each working condition according to the fourth curve and the fifth curve.
Further, the step of selecting at least one positive power area from the plurality of positive power areas for the vehicle to perform positive power according to the ratio, obtaining a positive power test point on the second curve included in each selected positive power area, and calculating a positive power running time corresponding to each positive power test point according to the sum of the positive power test points and the vehicle to perform positive power includes:
dividing a plurality of positive work areas for the vehicle to do positive work into a plurality of high speed areas and a plurality of low speed areas according to the rated rotating speed of the driving motor, selecting a first area with the largest proportion from the plurality of high speed areas, obtaining a first test point on the second curve contained in the first area, and calculating to obtain a first running time according to the first test point and the sum of the positive work done by the vehicle in the high speed areas;
and selecting a second area with the largest proportion from the plurality of low-speed areas, obtaining a second test point on the second curve contained in the second area, and calculating to obtain a second running time according to the second test point and the sum of positive work of the vehicle in the low-speed area.
Further, the step of selecting at least one negative work area from the plurality of negative work areas for the vehicle to perform negative work according to the ratio, obtaining a negative work test point on the second curve included in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work performed by the vehicle includes:
and selecting a third area with the largest proportion from the plurality of negative work areas of the vehicle for performing negative work, acquiring a third test point on the second curve contained in the third area, and calculating to obtain a third running time according to the third test point and the sum of the negative work performed by the vehicle in the negative work area.
Further, the step of performing a test of multiple test cycles on the driving motor system with each positive power test point under suburb operating condition running a corresponding positive power running time, each negative power test point running a corresponding negative power running time, each positive power test point under urban operating condition running a corresponding positive power running time, each negative power test point running a corresponding negative power running time, each positive power test point under high-speed operating condition running a corresponding positive power running time, each negative power test point running a corresponding negative power running time, is a test cycle, and specifically includes:
the method comprises the steps that a first test point runs for a first running time under a suburb working condition, a second test point runs for a second running time, a third test point runs for a third running time, a first test point runs for the first running time under a urban working condition, a second test point runs for the second running time, a third test point runs for the third running time, a first test point runs for the first running time under a high-speed working condition, a second test point runs for the second running time, and a third test point runs for the third running time, and the driving motor system is tested for multiple test periods.
Further, after the step of calculating the negative work running time corresponding to each negative work test point according to the negative work test points and the sum of the negative work done by the vehicle, the method further comprises the following steps:
calculating to obtain positive work driving mileage according to each positive work test point and the respective corresponding positive work running time;
calculating to obtain the negative work driving mileage according to each negative work test point and the corresponding negative work running time;
adding the positive power driving mileage and the negative power driving mileage to obtain driving mileage to be verified;
if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve of the positive power test points belongs, a positive power test point is obtained again on the second curve contained in each selected positive power area, and a negative power test point is obtained again on the second curve contained in each selected negative power area.
Further, the step of testing the drive motor system for a plurality of test cycles includes:
and setting the test environment temperature of the driving motor system as a first temperature, setting the temperature of the cooling water as a second temperature, and carrying out continuous test for a preset time.
Further, the conversion parameters include: the air resistance coefficient, the rolling resistance coefficient, the frontal area of the vehicle, the total mass of the vehicle, the wheel radius of the vehicle and the speed reducer speed ratio of the vehicle.
According to still another aspect of the present invention, there is provided a driving motor system reliability testing apparatus including:
the acquisition module is used for acquiring a first curve of the vehicle speed and the time under each working condition of the vehicle, wherein the working condition of the vehicle comprises the following steps: suburb conditions, urban conditions and high-speed conditions;
the calculation module is used for determining a second curve of the rotating speed and the torque under each working condition according to the first curve;
the statistical module is used for dividing a plurality of positive work areas for the vehicles to do positive work and a plurality of negative work areas for the vehicles to do negative work according to the second curve aiming at each working condition of the vehicles, and counting the proportion of the part of the second curve contained in each area;
the first processing module is used for selecting at least one positive power region from a plurality of positive power regions for the vehicle to do positive power according to the proportion aiming at each working condition of the vehicle, acquiring a positive power test point on the second curve contained in each selected positive power region, and calculating the positive power running time corresponding to each positive power test point according to the positive power test point and the sum of the positive power done by the vehicle;
the second processing module is used for selecting at least one negative work area from a plurality of negative work areas for the vehicle to do negative work according to the proportion, acquiring a negative work test point on the second curve contained in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work done by the vehicle;
the test module is used for testing the driving motor system in a plurality of test periods, wherein each positive power test point under the suburb working condition runs a corresponding positive power running time, each negative power test point runs a corresponding negative power running time, each positive power test point under the urban working condition runs a corresponding positive power running time, each negative power test point runs a corresponding negative power running time, each positive power test point under the high-speed working condition runs a corresponding positive power running time, and each negative power test point runs a corresponding negative power running time.
Further, the calculation module includes:
the first calculation unit is used for obtaining a third curve of acceleration and time and a fourth curve of rotating speed and time under each working condition according to the first curve and the conversion parameters;
the second calculating unit is used for obtaining a fifth curve of the torque and the time under each working condition according to the third curve;
and the third calculating unit is used for obtaining a second curve of the rotating speed and the torque under each working condition according to the fourth curve and the fifth curve.
Further, the first processing module is specifically configured to divide a plurality of positive power regions in which the vehicle performs positive power into a plurality of high speed regions and a plurality of low speed regions according to a rated rotation speed of the driving motor, select a first region with a largest proportion from the plurality of high speed regions, acquire a first test point on the second curve included in the first region, and calculate a first operation time according to the first test point and a sum of positive power performed by the vehicle in the high speed region;
and selecting a second area with the largest proportion from the plurality of low-speed areas, obtaining a second test point on the second curve contained in the second area, and calculating to obtain a second running time according to the second test point and the sum of positive work of the vehicle in the low-speed area.
Further, the second processing module is specifically configured to select a third area with a largest proportion from the multiple negative work areas where the vehicle performs negative work, obtain a third test point on the second curve included in the third area, and calculate a third running time according to the third test point and a sum of negative work performed by the vehicle in the negative work areas.
Further, the test module is specifically configured to run a first test point under a suburb condition for a first running time, run a second test point for a second running time, run a third test point for a third running time, run the first test point under a urban condition for the first running time, run the second test point for the second running time, run the third test point for the third running time, run the first test point under a high-speed condition for the first running time, run the second test point for the second running time, and run the third test point for the third running time, so that the drive motor system is tested for multiple test cycles.
Further, the apparatus further comprises:
the first mileage calculation module is used for calculating to obtain the positive work driving mileage according to each positive work test point and the corresponding positive work running time;
the second mileage calculating module is used for calculating to obtain negative work driving mileage according to each negative work test point and the corresponding negative work running time;
the third processing module is used for adding the positive power mileage and the negative power mileage to obtain a mileage to be verified; if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve of the positive power test points belongs, a positive power test point is obtained again on the second curve contained in each selected positive power area, and a negative power test point is obtained again on the second curve contained in each selected negative power area.
The invention has the beneficial effects that:
according to the technical scheme, a first curve of the speed and the time is obtained for each working condition of the suburb working condition, the urban working condition and the high-speed working condition, a second curve of the rotating speed and the torque is obtained according to the first curve, a plurality of test points are obtained from the second curve according to the work of the vehicle, and the corresponding running time is obtained through calculation according to the test points, so that the test period is determined, and the driving motor system is tested in a plurality of test periods.
Drawings
Fig. 1 is a schematic diagram illustrating a method for testing reliability of a driving motor system according to an embodiment of the present invention;
FIG. 2 is a first graphical representation of vehicle speed versus time under suburban conditions in accordance with an embodiment of the present invention;
FIG. 3 is a second graphical illustration of speed versus torque for suburban conditions in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the division of the suburban area under suburban conditions according to an embodiment of the present invention;
FIG. 5 is a graphical representation of acceleration versus time under suburban conditions in accordance with an embodiment of the present invention;
FIG. 6 is a graphical representation of torque versus time for suburban conditions in accordance with an embodiment of the present invention;
FIG. 7 is a graph illustrating a speed versus time curve under suburban conditions in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating the rotation speed and time of a test point selected under suburban conditions according to an embodiment of the present invention;
FIG. 9 is a graphical representation of selected test point torque versus time under suburban conditions in accordance with an embodiment of the present invention;
FIG. 10 is a schematic diagram of a reliability testing apparatus for a driving motor system according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a computing module according to an embodiment of the invention.
Description of reference numerals:
81. an acquisition module; 82. a calculation module; 821. a first calculation unit; 822. a second calculation unit; 823. a third calculation unit; 83. a statistical module; 84. a first processing module; 85. a second processing module; 86. a test module; 87. a first mileage calculating module; 88. a second mileage calculating module; 89. and a third processing module.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a method for testing reliability of a driving motor system, where the method for testing reliability of a driving motor system includes:
s11: obtaining a first curve of vehicle speed and time under each working condition of the vehicle, wherein the working condition of the vehicle comprises the following steps: suburb conditions, urban conditions and high-speed conditions;
it should be noted that the vehicle corresponds to a first curve of vehicle speed and time under each working condition, and preferably, the first curve may be a vehicle speed and time curve obtained by a vehicle test under each working condition, and may also be a vehicle speed and time curve used in an existing reliability test process of a drive motor system. For convenience of subsequent calculation, a first curve of the preset time may be obtained, as shown in fig. 2, which is a curve of the vehicle speed versus time within 0 to 400 seconds.
S12: determining a second curve of the rotating speed and the torque under each working condition according to the first curve;
it should be noted that the second curve of the rotating speed and the torque is obtained according to the relation between the vehicle speed and the rotating speed and the torque and the determined first curve. Specifically, a second curve of the rotating speed and the torque under the suburban working condition is determined according to a first curve under the suburban working condition, a second curve of the rotating speed and the torque under the urban working condition is determined according to a first curve under the urban working condition, and a second curve of the rotating speed and the torque under the high-speed working condition is determined according to a first curve under the high-speed working condition.
S13: according to each working condition of the vehicle, dividing a plurality of positive work areas for the vehicle to do positive work and a plurality of negative work areas for the vehicle to do negative work according to a second curve, and counting the proportion of the part of the second curve contained in each area;
it should be noted that the division may be performed in a predetermined torque interval and a predetermined rotational speed interval, as shown in fig. 3 and 4, fig. 3 is a second graph of the rotational speed and the torque in the suburban operation, in which the horizontal axis is the rotational speed and the vertical axis is the torque, fig. 4 is a division diagram of the region in the suburban operation, as shown in fig. 4, the predetermined torque interval is 80N · m (nm), the predetermined rotational speed is 2000r/min (rpm), the rotational speed range may be 0 to 8000r/min, the torque range is-160N · m to 80N · m is divided into 12 regions, each region has the same area, the region where the torque is greater than 0 is a positive power region, and the region where the torque is less than 0 is a negative power region. Of course, the predetermined torque interval and the predetermined rotational speed interval may be set by the experience of the tester.
S14: according to each working condition of the vehicle, selecting at least one positive work area from a plurality of positive work areas for the vehicle to do positive work according to the proportion, obtaining a positive work test point on a second curve contained in each selected positive work area, and calculating the positive work running time corresponding to each positive work test point according to the positive work test point and the sum of the positive work done by the vehicle;
it should be noted that the positive power regions may be sorted according to the size of the proportion to generate a positive power region sequence, where the ratio of the foremost part of the positive power region sequence is the largest, the ratio of the rearmost part of the positive power region sequence is the smallest, one positive power region at the foremost part of the positive power region sequence may be selected, and of course, a plurality of front positive power regions from the front part of the positive power region sequence to the rear part of the positive power region sequence may also be selected. With continued reference to fig. 4, the positive power regions with the torque greater than 0 in fig. 4 include 4, and one positive power region with the largest ratio may be selected, or a total of two positive power regions with the largest ratio and the second largest ratio may be selected.
S15: selecting at least one negative work area from a plurality of negative work areas for the vehicle to do negative work according to the proportion, obtaining a negative work test point on a second curve contained in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work done by the vehicle;
it should be noted that the process of selecting the negative power region is similar to the process of selecting the positive power region, and is not described herein again.
S16: and running each positive power test point under suburb working conditions for corresponding positive power running time, running each negative power test point for corresponding negative power running time, running each positive power test point under urban working conditions for corresponding positive power running time, running each negative power test point for corresponding negative power running time, running each positive power test point under high-speed working conditions for corresponding positive power running time, and running each negative power test point for corresponding negative power running time to form a test period, and testing the driving motor system for a plurality of test periods.
It should be noted that, because three working conditions, namely, suburban working conditions, urban working conditions and high-speed working conditions, are considered in the vehicle testing process, a set of positive power running time corresponding to a positive power test point, a set of negative power test points and a negative power running time corresponding to the negative power test point can be obtained under each working condition; each group comprises at least one test point, so that three groups of data are obtained, the three groups of data form a test period, the number of the test period is determined according to actual requirements, and the test is performed according to the determined number of the period. For example, the test environment temperature of the driving motor system is set to be a first temperature, the temperature of the cooling water is set to be a second temperature, the continuous test is performed for a preset time period, the first temperature is less than or equal to 85 degrees celsius, preferably, the first temperature is 85 degrees celsius, the second temperature is less than or equal to 65 degrees celsius, preferably, the second temperature is 65 degrees celsius, and the preset time period can be determined according to different mileage requirements of the vehicle, for example, 3000 hours, but is not limited thereto.
In the embodiment of the invention, a first curve of the speed and the time is obtained aiming at each working condition of suburb working conditions, urban working conditions and high-speed working conditions, a second curve of the rotating speed and the torque is obtained according to the first curve, a plurality of test points are obtained from the second curve according to the work of the vehicle, and the corresponding running time is obtained through calculation according to the test points, so that the test period is determined, and the driving motor system is tested in a plurality of test periods.
In order to obtain the second curve of the rotating speed and the torque, on the basis of the above embodiment of the present invention, in the embodiment of the present invention, the step of determining the second curve of the rotating speed and the torque in each operating condition according to the first curve includes:
obtaining a third curve of acceleration and time and a fourth curve of rotating speed and time under each working condition according to the first curve and the conversion parameters;
obtaining a fifth curve of the torque and the time under each working condition according to the third curve;
and obtaining a second curve of the rotating speed and the torque under each working condition according to the fourth curve and the fifth curve.
It should be noted that the conversion parameters include: the system comprises an air resistance coefficient, a rolling resistance coefficient, a vehicle windward area, a vehicle total mass, a vehicle wheel radius and a vehicle speed reducer speed ratio; obtaining a curve of acceleration and time according to the curve of the vehicle speed and the time, and obtaining a curve of torque and time by combining with the conversion parameters; FIG. 5 is a graph illustrating acceleration versus time under suburban conditions, and FIG. 6 is a graph illustrating torque versus time under suburban conditions calculated according to FIG. 5; according to the curve of the vehicle speed and the time and the conversion parameter, a curve of the rotating speed and the time can be obtained, and a graph of the rotating speed and the time is shown in fig. 7.
In order to more approach the actual working condition of the vehicle, on the basis of the above embodiments of the present invention, in the embodiments of the present invention, at least one positive power region is selected from the plurality of positive power regions where the vehicle performs positive power according to the ratio, a positive power test point is obtained on the second curve included in each selected positive power region, and the step of calculating the positive power running time corresponding to each positive power test point according to the positive power test point and the sum of the positive power performed by the vehicle includes:
dividing a plurality of positive work areas of the vehicle for performing positive work into a plurality of high-speed areas and a plurality of low-speed areas according to the rated rotating speed of the driving motor, selecting a first area with the largest proportion from the plurality of high-speed areas, obtaining a first test point on a second curve contained in the first area, and calculating according to the first test point and the sum of the positive work performed by the vehicle in the high-speed areas to obtain a first running time;
and selecting a second area with the largest proportion from the plurality of low-speed areas, acquiring a second test point on a second curve contained in the second area, and calculating to obtain a second running time according to the second test point and the sum of positive work of the vehicle in the low-speed area.
It should be noted that the positive power region with the rotation speed greater than the rated rotation speed of the driving motor is a high-speed region, the positive power region with the rotation speed not greater than the rated rotation speed of the driving motor is a low-speed region, the positive power region is divided into the high-speed region and the low-speed region, and the first test point and the second test point are respectively obtained in the high-speed region and the low-speed region, so that the actual working condition of the vehicle can be more approximate.
On the basis of the above embodiments of the invention, in the embodiments of the invention, the step of selecting at least one negative work area from a plurality of negative work areas for the vehicle to perform negative work according to the proportion, obtaining a negative work test point on a second curve included in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the sum of the negative work test point and the negative work performed by the vehicle includes:
and selecting a third area with the largest proportion from the plurality of negative work areas of the vehicle for performing negative work, acquiring a third test point on a second curve contained in the third area, and calculating to obtain a third running time according to the third test point and the sum of the negative work performed by the vehicle in the negative work areas.
It should be noted that the division of the negative work area may continue, similar to the division of the positive work area into a high speed area and a low speed area. Of course, the sum of the proportions of the portions of the second curve included in each negative work area is low, and therefore the negative work area may not be further divided.
The method comprises the following steps of running corresponding positive power running time by each positive power test point under suburban conditions, running corresponding negative power running time by each negative power test point, running corresponding positive power running time by each positive power test point under urban conditions, running corresponding negative power running time by each negative power test point, running corresponding positive power running time by each positive power test point under high-speed conditions, running corresponding negative power running time by each negative power test point, and performing a plurality of test cycles on a driving motor system, wherein the test cycles comprise the following steps:
the method comprises the steps that a first test point runs for a first running time under a suburb working condition, a second test point runs for a second running time, a third test point runs for a third running time, a first test point runs for the first running time under a urban working condition, a second test point runs for the second running time, a third test point runs for the third running time, a first test point runs for the first running time under a high-speed working condition, a second test point runs for the second running time, and a third test point runs for the third running time, and the driving motor system is tested for multiple test periods. As shown in fig. 8 and 9, the first test point, the second test point, and the third test point under the suburb condition and the corresponding operating time are shown schematically, where in fig. 8, the abscissa is time, the unit is second, and the ordinate is the unit of rotation speed, i.e. rpm; in fig. 9, the abscissa is time in seconds and the ordinate is torque in nm.
In order to perform mileage verification on the test points, on the basis of the above embodiments of the present invention, after the step of calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work performed by the vehicle in the embodiment of the present invention, the method further includes:
calculating to obtain positive work driving mileage according to each positive work test point and the respective corresponding positive work running time;
calculating to obtain the negative work driving mileage according to each negative work test point and the corresponding negative work running time;
adding the positive power driving mileage and the negative power driving mileage to obtain driving mileage to be verified;
and if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve of the positive power test point belongs, re-acquiring a positive power test point on the second curve contained in each selected positive power area, and re-acquiring a negative power test point on the second curve contained in each selected negative power area.
It should be noted that if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve belongs, which is the positive power test point, it is indicated that the mileage verification fails, and the positive power test point and the negative power test point need to be selected again until the mileage verification passes.
As shown in fig. 10 and 11, according to still another aspect of the present invention, there is provided a driving motor system reliability testing apparatus including:
the obtaining module 81 is configured to obtain a first curve of a vehicle speed and time under each working condition of the vehicle, where the working condition of the vehicle includes: suburb conditions, urban conditions and high-speed conditions;
the calculation module 82 is used for determining a second curve of the rotating speed and the torque under each working condition according to the first curve;
the statistical module 83 is configured to divide positive power regions in which the plurality of vehicles perform positive power and negative power regions in which the plurality of vehicles perform negative power according to the second curve for each working condition of the vehicle, and count a proportion of a part of the second curve included in each region;
the first processing module 84 is configured to select at least one positive power region from a plurality of positive power regions for performing positive power on the vehicle according to a ratio for each working condition of the vehicle, obtain a positive power test point on a second curve included in each selected positive power region, and calculate a positive power running time corresponding to each positive power test point according to the positive power test point and a sum of the positive power performed by the vehicle;
the second processing module 85 is configured to select at least one negative work area from the multiple negative work areas for the vehicle to perform negative work according to a ratio, obtain a negative work test point on a second curve included in each selected negative work area, and calculate a negative work operation time corresponding to each negative work test point according to the negative work test point and a sum of negative work performed by the vehicle;
the test module 86 is configured to use each positive power test point under the suburb condition to run a corresponding positive power running time, each negative power test point to run a corresponding negative power running time, each positive power test point under the urban condition to run a corresponding positive power running time, each negative power test point to run a corresponding negative power running time, each positive power test point under the high-speed condition to run a corresponding positive power running time, and each negative power test point to run a corresponding negative power running time, as a test cycle, and perform a test of multiple test cycles on the drive motor system.
Wherein, the calculation module 82 comprises:
the first calculating unit 821 is configured to obtain a third curve of acceleration and time and a fourth curve of rotation speed and time under each working condition according to the first curve and the conversion parameter;
a second calculating unit 822, configured to obtain a fifth curve of the torque and the time under each working condition according to the third curve;
and a third calculating unit 823 for obtaining a second curve of the rotation speed and the torque in each working condition according to the fourth curve and the fifth curve.
The first processing module 84 is specifically configured to divide a plurality of positive power regions in which the vehicle performs positive power into a plurality of high speed regions and a plurality of low speed regions according to the rated rotation speed of the driving motor, select a first region with a largest proportion from the plurality of high speed regions, acquire a first test point on a second curve included in the first region, and calculate a first operation time according to the first test point and the sum of the positive power performed by the vehicle in the high speed region;
and selecting a second area with the largest proportion from the plurality of low-speed areas, acquiring a second test point on a second curve contained in the second area, and calculating to obtain a second running time according to the second test point and the sum of positive work of the vehicle in the low-speed area.
The second processing module 85 is specifically configured to select a third area with the largest proportion from the multiple negative work areas where the vehicle performs negative work, obtain a third test point on a second curve included in the third area, and calculate a third running time according to the third test point and a sum of the negative work performed by the vehicle in the negative work area.
The test module 86 is specifically configured to perform a test of multiple test cycles on the driving motor system by using the first test point under the suburb condition to run for a first running time, the second test point to run for a second running time, the third test point to run for a third running time, the first test point under the urban condition to run for the first running time, the second test point to run for the second running time, the third test point to run for the third running time, the first test point under the high-speed condition to run for the first running time, the second test point to run for the second running time, and the third test point to run for the third running time.
It should be noted that the step of performing a plurality of test cycles of the drive motor system comprises: and setting the test environment temperature of the driving motor system as a first temperature, setting the temperature of the cooling water as a second temperature, and carrying out continuous test for a preset time. The first temperature is less than or equal to 85 degrees celsius, the preferred first temperature is 85 degrees celsius, the second temperature is less than or equal to 65 degrees celsius, and the preferred second temperature is 65 degrees celsius, and the preset time period can be determined according to different mileage requirements of the vehicle, for example, 3000 hours, but is not limited thereto. The conversion parameters include: the air resistance coefficient, the rolling resistance coefficient, the frontal area of the vehicle, the total mass of the vehicle, the wheel radius of the vehicle and the speed reducer speed ratio of the vehicle.
In the embodiment of the invention, a first curve of the speed and the time is obtained aiming at each working condition of suburb working conditions, urban working conditions and high-speed working conditions, a second curve of the rotating speed and the torque is obtained according to the first curve, a plurality of test points are obtained from the second curve according to the work of the vehicle, and the corresponding running time is obtained through calculation according to the test points, so that the test period is determined, and the driving motor system is tested in a plurality of test periods.
With continued reference to fig. 10, the drive motor system reliability testing apparatus further includes:
the first mileage calculating module 87 is used for calculating to obtain the positive work driving mileage according to each positive work test point and the corresponding positive work running time;
the second mileage calculating module 88 is used for calculating to obtain the negative work driving mileage according to each negative work test point and the corresponding negative work running time;
the third processing module 89 is configured to add the positive power mileage and the negative power mileage to obtain a mileage to be verified; and if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve of the positive power test point belongs, re-acquiring a positive power test point on the second curve contained in each selected positive power area, and re-acquiring a negative power test point on the second curve contained in each selected negative power area.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
Claims (14)
1. A method for testing reliability of a driving motor system is characterized by comprising the following steps:
obtaining a first curve of vehicle speed and time under each working condition of a vehicle, wherein the working condition of the vehicle comprises: suburb conditions, urban conditions and high-speed conditions;
determining a second curve of the rotating speed and the torque under each working condition according to the first curve;
according to each working condition of the vehicle, dividing a plurality of positive work areas for the vehicle to do positive work and a plurality of negative work areas for the vehicle to do negative work according to the second curve, and counting the proportion of the part of the second curve contained in each area;
according to each working condition of the vehicle, selecting at least one positive power area from a plurality of positive power areas for the vehicle to do positive power according to the proportion, obtaining a positive power test point on the second curve contained in each selected positive power area, and calculating the positive power running time corresponding to each positive power test point according to the sum of the positive power test points and the positive power done by the vehicle;
selecting at least one negative work area from a plurality of negative work areas for the vehicle to work according to the proportion, obtaining a negative work test point on the second curve contained in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work of the vehicle;
and running each positive power test point under suburb working conditions for corresponding positive power running time, running each negative power test point for corresponding negative power running time, running each positive power test point under urban working conditions for corresponding positive power running time, running each negative power test point for corresponding negative power running time, running each positive power test point under high-speed working conditions for corresponding positive power running time, and running each negative power test point for corresponding negative power running time to form a test period, and testing the driving motor system for a plurality of test periods.
2. The method of claim 1, wherein determining a second curve of speed and torque for each operating condition based on the first curve comprises:
obtaining a third curve of acceleration and time and a fourth curve of rotating speed and time under each working condition according to the first curve and the conversion parameters;
obtaining a fifth curve of the torque and the time under each working condition according to the third curve;
and obtaining a second curve of the rotating speed and the torque under each working condition according to the fourth curve and the fifth curve.
3. The method for testing the reliability of the driving motor system according to claim 1, wherein the step of selecting at least one positive power region from the plurality of positive power regions for the vehicle to perform positive power according to the ratio, obtaining a positive power test point on the second curve included in each selected positive power region, and calculating a positive power running time corresponding to each positive power test point according to the sum of the positive power test point and the positive power performed by the vehicle comprises:
dividing a plurality of positive work areas for the vehicle to do positive work into a plurality of high speed areas and a plurality of low speed areas according to the rated rotating speed of the driving motor, selecting a first area with the largest proportion from the plurality of high speed areas, obtaining a first test point on the second curve contained in the first area, and calculating to obtain a first running time according to the first test point and the sum of the positive work done by the vehicle in the high speed areas;
and selecting a second area with the largest proportion from the plurality of low-speed areas, obtaining a second test point on the second curve contained in the second area, and calculating to obtain a second running time according to the second test point and the sum of positive work of the vehicle in the low-speed area.
4. The method as claimed in claim 3, wherein the step of selecting at least one negative power region from a plurality of negative power regions for the vehicle to perform negative power according to the ratio, obtaining a negative power test point on the second curve included in each selected negative power region, and calculating the negative power running time corresponding to each negative power test point according to the sum of the negative power test point and the negative power performed by the vehicle comprises:
and selecting a third area with the largest proportion from the plurality of negative work areas of the vehicle for performing negative work, acquiring a third test point on the second curve contained in the third area, and calculating to obtain a third running time according to the third test point and the sum of the negative work performed by the vehicle in the negative work area.
5. The method for testing the reliability of the driving motor system according to claim 4, wherein the step of testing the driving motor system for a plurality of test cycles comprises the steps of running each positive power test point under the suburban condition for a corresponding positive power running time, running each negative power test point for a corresponding negative power running time, running each positive power test point under the urban condition for a corresponding positive power running time, running each negative power test point for a corresponding negative power running time, running each positive power test point under the high-speed condition for a corresponding positive power running time, and running each negative power test point for a corresponding negative power running time, wherein the test cycles comprise:
the method comprises the steps that a first test point runs for a first running time under a suburb working condition, a second test point runs for a second running time, a third test point runs for a third running time, a first test point runs for the first running time under a suburb working condition, a second test point runs for the second running time, a third test point runs for the third running time, a first test point runs for the first running time under a high-speed working condition, a second test point runs for the second running time, and a third test point runs for the third running time, and the test period is one test period, and the drive motor system is tested for multiple test periods.
6. The method of claim 1, wherein after the step of calculating the negative work running time corresponding to each negative work test point according to the negative work test points and the sum of the negative work done by the vehicle, the method further comprises:
calculating to obtain positive work driving mileage according to each positive work test point and the respective corresponding positive work running time;
calculating to obtain the negative work driving mileage according to each negative work test point and the corresponding negative work running time;
adding the positive power driving mileage and the negative power driving mileage to obtain driving mileage to be verified;
if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve of the positive power test points belongs, a positive power test point is obtained again on the second curve contained in each selected positive power area, and a negative power test point is obtained again on the second curve contained in each selected negative power area.
7. The method of claim 1, wherein the step of testing the drive motor system for a plurality of test cycles comprises:
and setting the test environment temperature of the driving motor system as a first temperature, setting the temperature of the cooling water as a second temperature, and carrying out continuous test for a preset time.
8. The drive motor system reliability testing method of claim 2, wherein the conversion parameters comprise: the air resistance coefficient, the rolling resistance coefficient, the frontal area of the vehicle, the total mass of the vehicle, the wheel radius of the vehicle and the speed reducer speed ratio of the vehicle.
9. A drive motor system reliability testing device is characterized by comprising:
the acquisition module is used for acquiring a first curve of the vehicle speed and the time under each working condition of the vehicle, wherein the working condition of the vehicle comprises the following steps: suburb conditions, urban conditions and high-speed conditions;
the calculation module is used for determining a second curve of the rotating speed and the torque under each working condition according to the first curve;
the statistical module is used for dividing a plurality of positive work areas for the vehicles to do positive work and a plurality of negative work areas for the vehicles to do negative work according to the second curve aiming at each working condition of the vehicles, and counting the proportion of the part of the second curve contained in each area;
the first processing module is used for selecting at least one positive power region from a plurality of positive power regions for the vehicle to do positive power according to the proportion aiming at each working condition of the vehicle, acquiring a positive power test point on the second curve contained in each selected positive power region, and calculating the positive power running time corresponding to each positive power test point according to the positive power test point and the sum of the positive power done by the vehicle;
the second processing module is used for selecting at least one negative work area from a plurality of negative work areas for the vehicle to do negative work according to the proportion, acquiring a negative work test point on the second curve contained in each selected negative work area, and calculating the negative work running time corresponding to each negative work test point according to the negative work test point and the sum of the negative work done by the vehicle;
the test module is used for testing the driving motor system in a plurality of test periods, wherein each positive power test point under the suburb working condition runs a corresponding positive power running time, each negative power test point runs a corresponding negative power running time, each positive power test point under the urban working condition runs a corresponding positive power running time, each negative power test point runs a corresponding negative power running time, each positive power test point under the high-speed working condition runs a corresponding positive power running time, and each negative power test point runs a corresponding negative power running time.
10. The drive motor system reliability testing apparatus of claim 9, wherein the computing module comprises:
the first calculation unit is used for obtaining a third curve of acceleration and time and a fourth curve of rotating speed and time under each working condition according to the first curve and the conversion parameters;
the second calculating unit is used for obtaining a fifth curve of the torque and the time under each working condition according to the third curve;
and the third calculating unit is used for obtaining a second curve of the rotating speed and the torque under each working condition according to the fourth curve and the fifth curve.
11. The device for testing the reliability of the driving motor system according to claim 9, wherein the first processing module is specifically configured to divide a plurality of positive power regions in which the vehicle performs positive power into a plurality of high speed regions and a plurality of low speed regions according to a rated rotation speed of the driving motor, select a first region with a largest proportion from the plurality of high speed regions, obtain a first test point on the second curve included in the first region, and calculate a first operating time according to a sum of the first test point and the positive power performed by the vehicle in the high speed region;
and selecting a second area with the largest proportion from the plurality of low-speed areas, obtaining a second test point on the second curve contained in the second area, and calculating to obtain a second running time according to the second test point and the sum of positive work of the vehicle in the low-speed area.
12. The device for testing the reliability of the driving motor system according to claim 11, wherein the second processing module is specifically configured to select a third region with a largest proportion from a plurality of negative work regions where the vehicle performs negative work, obtain a third test point on the second curve included in the third region, and calculate a third operation time according to the third test point and a sum of negative work performed by the vehicle in the negative work region.
13. The device of claim 12, wherein the test module is specifically configured to run the first test point under the suburban operating condition for a first running time, run the second test point for a second running time, run the third test point for a third running time, run the first test point under the urban operating condition for the first running time, run the second test point for the second running time, run the third test point for the third running time, run the first test point under the high-speed operating condition for the first running time, run the second test point for the second running time, and run the third test point for the third running time, so as to perform a test of the drive motor system for a plurality of test cycles for one test cycle.
14. The drive motor system reliability testing apparatus of claim 9, wherein the apparatus further comprises:
the first mileage calculation module is used for calculating to obtain the positive work driving mileage according to each positive work test point and the corresponding positive work running time;
the second mileage calculating module is used for calculating to obtain negative work driving mileage according to each negative work test point and the corresponding negative work running time;
the third processing module is used for adding the positive power mileage and the negative power mileage to obtain a mileage to be verified; if the driving mileage to be verified is not equal to the preset mileage of the working condition to which the second curve of the positive power test points belongs, a positive power test point is obtained again on the second curve contained in each selected positive power area, and a negative power test point is obtained again on the second curve contained in each selected negative power area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810842166.6A CN108983095B (en) | 2018-07-27 | 2018-07-27 | Method and device for testing reliability of driving motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810842166.6A CN108983095B (en) | 2018-07-27 | 2018-07-27 | Method and device for testing reliability of driving motor system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108983095A CN108983095A (en) | 2018-12-11 |
| CN108983095B true CN108983095B (en) | 2020-08-21 |
Family
ID=64551988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810842166.6A Active CN108983095B (en) | 2018-07-27 | 2018-07-27 | Method and device for testing reliability of driving motor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108983095B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112393910A (en) * | 2019-08-14 | 2021-02-23 | 北京新能源汽车股份有限公司 | Sound tightness performance analysis method and device and upper computer |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480720A (en) * | 2002-09-08 | 2004-03-10 | 明 吴 | Multifunctional device for testing simulated load of cars |
| CN1488925A (en) * | 2003-07-29 | 2004-04-14 | 北京理工大学 | Automobile hub power characteristic rapid measuring method |
| JP4310617B2 (en) * | 2002-11-26 | 2009-08-12 | 株式会社安川電機 | Power regeneration converter |
| CN102435946A (en) * | 2011-09-02 | 2012-05-02 | 上海中科深江电动车辆有限公司 | Off-line detection device for driving motor of electric vehicle |
| CN102442221A (en) * | 2010-10-11 | 2012-05-09 | 北汽福田汽车股份有限公司 | Method and device for selecting motor system |
| CN102520356A (en) * | 2012-01-06 | 2012-06-27 | 湖南南车时代电动汽车股份有限公司 | Drive motor test platform for electric automobile |
| CN104748981A (en) * | 2015-04-16 | 2015-07-01 | 福州大学 | New energy vehicle testing system based on driver-vehicle-road closed-loop control |
| CN107490763A (en) * | 2017-08-22 | 2017-12-19 | 中国矿业大学 | The load simulation experimental rig and method of a kind of low-speed big permanent-magnet drive system |
-
2018
- 2018-07-27 CN CN201810842166.6A patent/CN108983095B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480720A (en) * | 2002-09-08 | 2004-03-10 | 明 吴 | Multifunctional device for testing simulated load of cars |
| JP4310617B2 (en) * | 2002-11-26 | 2009-08-12 | 株式会社安川電機 | Power regeneration converter |
| CN1488925A (en) * | 2003-07-29 | 2004-04-14 | 北京理工大学 | Automobile hub power characteristic rapid measuring method |
| CN102442221A (en) * | 2010-10-11 | 2012-05-09 | 北汽福田汽车股份有限公司 | Method and device for selecting motor system |
| CN102435946A (en) * | 2011-09-02 | 2012-05-02 | 上海中科深江电动车辆有限公司 | Off-line detection device for driving motor of electric vehicle |
| CN102520356A (en) * | 2012-01-06 | 2012-06-27 | 湖南南车时代电动汽车股份有限公司 | Drive motor test platform for electric automobile |
| CN104748981A (en) * | 2015-04-16 | 2015-07-01 | 福州大学 | New energy vehicle testing system based on driver-vehicle-road closed-loop control |
| CN107490763A (en) * | 2017-08-22 | 2017-12-19 | 中国矿业大学 | The load simulation experimental rig and method of a kind of low-speed big permanent-magnet drive system |
Non-Patent Citations (2)
| Title |
|---|
| 矿用电机驱动系统提高可靠性研究;逯文强;《同煤科技》;20180430(第2期);第17-20、24页 * |
| 驱动电机系统可靠性测试方法研究和影响因素分析;黄炘 等;《汽车电器》;20151231(第6期);第56-59页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108983095A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109421543B (en) | Method and device for estimating remaining mileage of vehicle with power supply system | |
| CN112034345B (en) | High-temperature durability test method for vehicle motor | |
| CN109100651B (en) | Method and device for determining performance of motor system and test equipment | |
| CN109228886B (en) | Parameter matching method, control device and equipment for electric vehicle power assembly | |
| EP3206007A1 (en) | Method for performing a test drive of a vehicle | |
| CN108983095B (en) | Method and device for testing reliability of driving motor system | |
| CN106872177B (en) | Power system testing method and system for new energy automobile | |
| CN114329921A (en) | Method, device, equipment and medium for evaluating reliability performance of whole vehicle | |
| CN106597155B (en) | Method and device for testing reliability performance of electric drive system of hybrid electric vehicle | |
| CN102331721A (en) | Method, device and system for testing dynamic analog simulation of electronic control diesel engine | |
| CN113459896B (en) | Method and device for determining endurance mileage of electric vehicle | |
| CN113378359A (en) | Method and device for evaluating oil consumption of engine and transmission efficiency of whole vehicle | |
| CN111896264B (en) | Method and device for generating test working condition of range extender engine and electronic equipment | |
| CN112748343B (en) | Power battery power boundary detection method and device and electric automobile | |
| CN110836741B (en) | Pure electric vehicle efficiency consistency online testing method | |
| CN112092817A (en) | Vehicle energy consumption analysis method and device and vehicle | |
| CN114407906B (en) | Vehicle load measuring method, device, storage medium and equipment | |
| CN109342078A (en) | The economic testing method, apparatus and test device of electric four-wheel drive vehicle | |
| CN115027445A (en) | Vehicle electric power determination method and device, electronic equipment and storage medium | |
| CN113076841A (en) | Vehicle testing method and device and electronic equipment | |
| CN112729862B (en) | Unmanned driving behavior safety assessment method and device and electronic equipment | |
| CN108268678A (en) | Driving behavior analysis method, apparatus and system | |
| CN113281597A (en) | Pure electric vehicle power assembly bench test system and method | |
| CN112699490A (en) | Vehicle maintenance result verification method and device | |
| CN110702422A (en) | Electric automobile driving range simulation measuring and calculating method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |