CN114609520A - Dual-motor electric drive bridge durability test system and test method - Google Patents
Dual-motor electric drive bridge durability test system and test method Download PDFInfo
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- CN114609520A CN114609520A CN202210222115.XA CN202210222115A CN114609520A CN 114609520 A CN114609520 A CN 114609520A CN 202210222115 A CN202210222115 A CN 202210222115A CN 114609520 A CN114609520 A CN 114609520A
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- 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
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
Abstract
The invention belongs to the technical field of electric vehicle testing, and discloses a dual-motor electric drive axle durability testing system and a testing method, wherein the dual-motor electric drive axle durability testing system comprises an automatic control and measuring device, an electric drive axle provided with a first real vehicle motor and a second real vehicle motor, a motor control device and a loading power measuring device; the motor control device comprises a first motor controller and a second motor controller and is used for controlling the output rotating speed and/or the output torque of the first real vehicle motor and the second real vehicle motor; the loading dynamometer of the communication connection automatic control and measurement device comprises a first loading dynamometer and a second loading dynamometer, and the loading dynamometer regulates the output torque of the electric drive axle. The system for testing the durability of the double-motor electric drive axle simulates the working condition of a road spectrum to test the durability of the double-motor electric drive axle and can also calibrate the racks of the double motors and the motor controllers of a real vehicle; the test method provides reliable basis for road test calibration, shortens the calibration time of the whole vehicle and saves the cost.
Description
Technical Field
The invention relates to the technical field of electric vehicle testing, in particular to a system and a method for testing durability of a double-motor electric drive axle.
Background
Pure electric drive axle products have already obtained the application on new energy automobile to will become the mainstream trend in market in a period of time in the future, wherein, central authorities' integrated form double motor electric drive axle has compromise complete vehicle dynamic nature and economic nature, receives the favor of each big host computer factory gradually. The electric drive axle is characterized in that two drive motors are arranged on two sides of the axle body in an oblique symmetrical arrangement or a same-side parallel arrangement, are highly integrated with a speed change mechanism and then are installed in an axle housing to drive wheels to run together. As the bench test verification of a new product of the dual-motor drive axle pays more and more attention to the actual application working condition of the product, the control mode, the software function, the auxiliary test module and other aspects of the existing test equipment can not meet the verification requirement of the dual-motor drive axle product, and the test method also refers to the industry standard of the traditional axle for testing, so the durability of the dual-motor drive axle product similar to the actual vehicle working condition can not be really checked.
Therefore, it is desirable to design a system and a method for testing the durability of a dual-motor drive bridge to solve the above problems.
Disclosure of Invention
The invention aims to provide a dual-motor drive axle durability test system which can simulate a road spectrum working condition to carry out durability test on a dual-motor drive axle and can also carry out rack calibration on the dual motors and a motor controller of a real vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
provided is a dual-motor drive bridge durability test system, including:
an automatic control and measurement device;
the electric drive axle is provided with a first real vehicle motor and a second real vehicle motor and comprises a first output end and a second output end;
the motor control device comprises a first motor controller and a second motor controller, the first motor controller is electrically connected with the first real vehicle motor, the second motor controller is electrically connected with the second real vehicle motor, the motor control device is in communication connection with the automatic control and measurement device, and the motor control device is configured to control the output rotating speed and/or the output torque of the first real vehicle motor and the second real vehicle motor; and
and the loading dynamometer comprises a first loading dynamometer and a second loading dynamometer, the first loading dynamometer is connected with the first output end and the second loading dynamometer is connected with the second output end respectively, the loading dynamometer is in communication connection with the automatic control and measurement device, and the loading dynamometer is configured to adjust the output torque of the electric drive axle.
As a preferable configuration of the present invention, the motor control device further includes:
a battery simulator electrically connected to the first motor controller and the second motor controller.
As a preferable structure of the present invention, the present invention further includes:
the first cooling device is connected with the first real vehicle motor and the first motor controller;
and the second cooling device is connected with the second real vehicle motor and the second motor controller.
As a preferable structure of the present invention, the present invention further includes:
the early fault diagnosis device is connected to the electric drive axle and can collect vibration data of the electric drive axle, and the early fault diagnosis device is in communication connection with the automatic control and measurement device.
As a preferable structure of the present invention, the present invention further includes:
and the gear control strategy device is connected to the electric drive axle and can control the electric drive axle to shift gears, and the gear control strategy device is in communication connection with the automatic control and measurement device.
As a preferable structure of the present invention, the present invention further includes:
and the lubricating oil temperature control device is connected to the electric drive axle and can acquire the lubricating oil temperature data of the electric drive axle, and the lubricating oil temperature control device is in communication connection with the automatic control and measurement device.
As a preferred structure of the present invention, the load dynamometer further includes a first sensor connected to the first output end and a second sensor connected to the second output end, respectively, and the first sensor and the second sensor are used for measuring the output rotation speed and/or the output torque of the electric drive axle, respectively.
As a preferable structure of the present invention, the load dynamometer further includes a first gear box connected to the first sensor and a second gear box connected to the second sensor, respectively, and the first gear box and the second gear box are used for adjusting the output torque of the electric drive axle, respectively.
As a preferable structure of the present invention, the present invention further includes:
the stall control device comprises a first stall controller connected with the first gearbox, a second stall controller connected with the second gearbox, and a stall control module, wherein the stall control module is in communication connection with the automatic control and measurement device and can control the start and stop of the first stall controller and the second stall controller.
The invention also aims to provide a test method, which can be used for carrying out bench verification and calibration of durability test on the dual-motor drive axle and provides a reliable basis for road test calibration.
In order to achieve the purpose, the invention adopts the following technical scheme:
a test method is applied to the dual-motor electric drive bridge durability test system and specifically comprises the following steps:
step S1, fixedly installing the dual-motor electric drive bridge durability test system on a test bench, and connecting a power cable and a communication cable;
step S2, carrying out power-on debugging on the dual-motor electric drive bridge durability test system;
step S3, editing test conditions, and inputting an automatic control and measurement device; the test conditions comprise various real vehicle working conditions, and a first characteristic point of the working rotating speed and a second characteristic point of the working torque of a first real vehicle motor and a second real vehicle motor are defined, wherein the first characteristic point comprises a rated rotating speed point, a highest working rotating speed point and a lowest working rotating speed point corresponding to rated power, and the second characteristic point comprises a rated torque point, a peak torque point, a rated power curve point and a peak power curve point;
step S4, carrying out running-in test on the electric drive axle according to the test conditions, wherein the working speed and the working torque during the running-in test are both 50% of the test conditions;
step S5, carrying out durability test on the electric drive axle according to the test conditions;
and step S6, completing the durability test, performing disassembly analysis and failure part inspection on the electric drive axle, and evaluating parts and influencing factors influencing the durability by combining test data.
The invention has the beneficial effects that:
the double-motor electric drive axle durability test system provided by the invention controls the first motor controller and the second motor controller by applying a CAN communication program of an automatic control and measurement device simulating a whole vehicle controller, simulates the working characteristics of a first real vehicle motor and a second real vehicle motor, and simulates the road working condition of a real vehicle to carry out durability test on the double-motor electric drive axle, the control mode, the software function and various auxiliary test modules of the automatic control and measurement device CAN meet the test requirements of the double-motor electric drive axle, the durability of a double-motor electric drive axle product similar to the working condition of the real vehicle CAN be truly examined, and the test system has the advantages of reasonable structure, high reliability, safety and reliability and high test precision; moreover, the dual-motor electric drive axle durability test system can not only realize that the electric drive axle is directly subjected to a real-vehicle dual-motor drive simulation road spectrum working condition for durability test, but also carry out rack calibration (including a load working condition) on the real-vehicle dual motors and respective motor controllers, and calibration data can provide reliable basis for road test calibration of the dual-motor electric drive axle, shorten the time for calibrating a whole vehicle and further shorten the product development period;
the testing method provided by the invention is applied to the dual-motor drive axle durability testing system, provides reliable basis for road test calibration, shortens the calibration time of the whole vehicle, reduces the calibration cost of the whole vehicle, further shortens the product research and development period efficiently, improves the product quality and saves the cost.
Drawings
Fig. 1 is a schematic structural diagram of a dual-motor drive bridge endurance testing system according to an embodiment of the present invention.
In the figure:
1. an automatic control and measurement device; 2. an electric drive axle; 21. a first real vehicle motor; 22. a second real vehicle motor; 23. a first output terminal; 24. a second output terminal; 3. a motor control device; 31. a first motor controller; 32. a second motor controller; 33. a battery simulator; 4. loading a dynamometer; 41. a first loading dynamometer; 42. a second loading dynamometer; 43. a first sensor; 44. a second sensor; 45. a first gear case; 46. a second gear box; 51. a first cooling device; 52. a second cooling device; 6. an early failure diagnosis means; 7. a gear control strategy device; 8. a lubricating oil temperature control device; 9. a stall control device; 91. a first stall controller; 92. a second stall controller; 93. a stall control module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
As shown in fig. 1, an embodiment of the present invention provides a dual-motor electric drive axle durability test system, which includes an automatic control and measurement device 1, an electric drive axle 2, a motor control device 3, and a loading dynamometer 4. The electric drive axle 2 is provided with a first real vehicle motor 21 and a second real vehicle motor 22, and the electric drive axle 2 comprises a first output end 23 and a second output end 24. The motor control device 3 comprises a first motor controller 31 electrically connected with the first real vehicle motor 21 and a second motor controller 32 electrically connected with the second real vehicle motor 22; the first real vehicle motor 21 and the second real vehicle motor 22 are mounted on the electric drive axle 2, and the first motor controller 31 and the second motor controller 32 are respectively connected with the first real vehicle motor 21 and the second real vehicle motor 22 through alternating current power lines.
The motor control device 3 is in communication connection with the automatic control and measurement device 1, and the motor control device 3 is configured to control the output rotating speed and/or the output torque of the first real vehicle motor 21 and the second real vehicle motor 22; preferably, the automatic control and measurement device 1 is connected to the first motor controller 31 and the second motor controller 32 through a CAN bus, and sends rotation speed and torque signals to the first motor controller 31 and the second motor controller 32, and the first motor controller 31 and the second motor controller 32 control the output rotation speed and/or the output torque of the first real vehicle motor 21 and the second real vehicle motor 22 according to the received rotation speed and torque signals.
The load dynamometer 4 comprises a first load dynamometer 41 connected to the first output 23 and a second load dynamometer 42 connected to the second output 24, respectively, the load dynamometer 4 is communicatively connected to the automatic control and measurement device 1, and the load dynamometer 4 is configured to regulate the output torque of the electric drive axle 2.
According to the double-motor electric drive axle durability test system, the CAN communication program of the automatic control and measurement device 1 for simulating the whole vehicle controller is used for controlling the first motor controller 31 and the second motor controller 32, the working characteristics of the first real vehicle motor 21 and the second real vehicle motor 22 are simulated, the road working condition of a real vehicle is simulated for carrying out durability test on the double-motor electric drive axle, the control mode, the software function and various auxiliary test modules of the automatic control and measurement device 1 CAN meet the test requirements of the double-motor electric drive axle, the durability of a double-motor electric drive axle product similar to the working condition of the real vehicle CAN be really checked, and the test system is reasonable in structure, high in reliability, safe and reliable, and high in test precision; moreover, the dual-motor drive axle durability test system of the embodiment can not only realize that the electric drive axle 2 is directly applied to the real-vehicle dual-motor drive simulation road spectrum working condition for durability test, but also perform rack calibration (including the working condition with load) on the real-vehicle dual motors and respective motor controllers, and the calibration data can provide reliable basis for road test calibration of the dual-motor drive axle, shorten the time for calibrating the whole vehicle, and further shorten the product development period.
Preferably, the motor control device 3 further includes a battery simulator 33, the battery simulator 33 is electrically connected to the first motor controller 31 and the second motor controller 32 through a direct current power line, and the first motor controller 31 and the second motor controller 32 respectively supply power to the first motor controller 31 and the second motor controller 32.
Preferably, the dual-motor electric drive axle durability test system further comprises a first cooling device 51 and a second cooling device 52. The first cooling device 51 is connected with the first real vehicle motor 21 and the first motor controller 31; the second cooling device 52 is connected to the second real vehicle motor 22 and the second motor controller 32. The first cooling device 51, the first real vehicle motor 21 and the first motor controller 31 form a first cooling loop, and the first cooling device 51 provides cooling for the first real vehicle motor 21 and the first motor controller 31; the second cooling device 52, the second real vehicle motor 22 and the second motor controller 32 form a second cooling loop, and the second cooling device 52 provides cooling for the second real vehicle motor 22 and the second motor controller 32. The first cooling device 51 and the second cooling device 52 prevent the electric transaxle 2, the first motor controller 31, and the second motor controller 32 to be tested from being excessively hot, and are closer to practical use conditions.
Preferably, the dual-motor electric drive axle durability test system further comprises an early failure diagnosis device 6, the early failure diagnosis device 6 is connected to the electric drive axle 2 and can collect vibration data of the electric drive axle 2, and the early failure diagnosis device 6 is in communication connection with the automatic control and measurement device 1. The early failure diagnosis device 6 collects vibration data of the electric drive axle 2 and feeds the vibration data back to the automatic control and measurement device 1, so that online monitoring and analysis are performed. The early fault diagnosis device 6 can analyze the performance states of the tested electric drive axle 2 under different test working conditions according to the vibration data, and provides effective data support for product improvement and optimization.
Preferably, the dual-motor electric drive axle durability test system further comprises a gear control strategy device 7, the gear control strategy device 7 is connected to the electric drive axle 2 and can control the electric drive axle 2 to shift gears, and the gear control strategy device 7 is in communication connection with the automatic control and measurement device 1. Preferably, the gear control strategy device 7 is mounted on the electric drive axle 2, the automatic control and measurement device 1 sends a rotation speed or torque signal to the gear control strategy device 7, and the gear control strategy device 7 controls the drive axle 2 to shift gears. The performance and durability test of the dual-motor drive axle gear shifting mechanism can be completed through the gear control strategy device 7.
Preferably, the dual-motor electric drive axle durability test system further comprises a lubricating oil temperature control device 8, the lubricating oil temperature control device 8 is connected to the electric drive axle 2 and can acquire lubricating oil temperature data of the electric drive axle 2, and the lubricating oil temperature control device 8 is in communication connection with the automatic control and measurement device 1. The lubricating oil temperature control device 8 collects the lubricating oil temperature data of the electric drive axle 2 and can adjust and control the temperature of the lubricating oil according to the oil temperature requirement of the automatic control and measurement device 1. The lubricating oil temperature control device 8 can recognize whether the temperature of the lubricating oil inside the speed reduction mechanism of the electric drive axle 2 is abnormal.
Preferably, the load dynamometer 4 further includes a first sensor 43 connected to the first output 23 and a second sensor 44 connected to the second output 24, and the first sensor 43 and the second sensor 44 are respectively used for measuring the output rotation speed and/or the output torque of the electric drive axle 2, so that the load dynamometer 4 can adjust the applied load to the electric drive axle 2 to be closer to the real working condition.
Preferably, the load dynamometer 4 further includes a first gearbox 45 connected to the first sensor 43 and a second gearbox 46 connected to the second sensor 44, respectively, and the first gearbox 45 and the second gearbox 46 are used for adjusting the output torque of the electric transaxle 2, respectively.
Preferably, the dual-motor electric drive axle durability test system further comprises a stall control device 9, the stall control device 9 comprises a first stall controller 91 connected to the first gearbox 45 and a second stall controller 92 connected to the second gearbox 46, and a stall control module 93, the stall control module 93 is in communication connection with the automatic control and measurement device 1, and can control the start and stop of the first stall controller 91 and the second stall controller 92. The stall control module 93 is connected with the first stall controller 91 and the second stall controller 92 through communication lines and sends start-stop control signals, so that the electric drive axle 2 simulates the whole vehicle stalling condition.
Example two
The embodiment of the invention provides a test method, which is applied to a dual-motor electric drive bridge durability test system in the first embodiment and specifically comprises the following steps:
step S1, fixedly installing the dual-motor electric drive bridge durability test system on a test bench, and connecting a power cable and a communication cable;
step S2, carrying out power-on debugging on the dual-motor electric drive bridge durability test system;
in this step S2, the power-on debugging includes, but is not limited to, the following: the debugging of the battery simulator 33 and/or the debugging of the first cooling circuit and/or the debugging of the second cooling circuit and/or the debugging of the early fault diagnosis device 6 and/or the debugging of the gear control strategy device 7 and/or the debugging of the lubricating oil temperature control device 8 and/or the debugging of the stall control device 9;
step S3, editing test conditions, and inputting the automatic control and measurement device 1; the test conditions comprise various real vehicle working conditions, and a first characteristic point of the working rotating speed of the first real vehicle motor 21 and the second real vehicle motor 22 and a second characteristic point of the working torque are defined, wherein the first characteristic point comprises a rated rotating speed point, a highest working rotating speed point and a lowest working rotating speed point corresponding to rated power, and the second characteristic point comprises a rated torque point, a peak torque point, a rated power curve point and a peak power curve point;
in step S3, the test conditions include simulating all possible conditions of the real vehicle during the actual application. The working conditions at least comprise forward working conditions, reverse working conditions, rapid acceleration, rapid deceleration, differential speed, differential torque and locked rotor working conditions; meanwhile, characteristic points of the working speeds of the first real vehicle motor 21 and the second real vehicle motor 22 are defined according to special characteristics of the two motors, namely, a rated speed point, a highest working speed point, a lowest working speed point corresponding to rated power and other specially defined working points are required to appear in the working speeds of the first real vehicle motor 21 and the second real vehicle motor 22; the characteristic points of the operating torques of the first real vehicle motor 21 and the second real vehicle motor 22 are also defined according to the special characteristics of the two motors, that is, the operating torques of the first real vehicle motor 21 and the second real vehicle motor 22 are required to occur at a rated torque point, a peak torque point, a point on a rated power curve, a point on a peak power curve and other special defined operating points.
Step S4, carrying out running-in test on the electric drive axle 2 according to the test conditions, wherein the working rotating speed and the working torque during the running-in test are both 50% of the test conditions;
in this step S4, the electric transaxle 2 running-in test is performed according to the test conditions edited in step S3, but only 50% of the operating rotational speed and the operating torque are used.
Step S5, carrying out durability test on the electric drive axle 2 according to the test conditions;
in step S5, the gear control strategy device 7 performs braking and gear shifting according to the gear shifting rule set by the test condition in step S3, and feeds back the acquired vehicle speed signal, gear shifting signal and current gear signal to the automatic control and measurement device 1; the lubricating oil temperature control device 8 adjusts the temperature of the electric drive axle 2 in accordance with the temperature set in the test condition in step S3, and feeds back the measured temperature data to the automatic control and measurement device 1. The first cooling device 51 and the second cooling device 52 respectively adjust the temperature of the cooling liquid of the first motor controller 31, the first real vehicle motor 21, the second motor controller 32, and the second real vehicle motor 22 according to the temperature parameter, the flow parameter, the valve opening degree, and the like set by the test conditions in step S3, and feed back the acquired temperature data to the automatic control and measurement device 1; the stall control device 9 sends start-stop control signals to the first stall controller 91 and the second stall controller 92 through the stall control module 93 according to the locked-rotor condition set by the test condition in the step S3, and feeds back locked-rotor on and off signals to the automatic control and measurement device 1; the early fault diagnosis device 6 self-learns the test initial running state of the whole system, vibration monitoring is carried out on the whole test process after the specified learning depth is reached, if the vibration signal is abnormal, the durability test of the electric drive axle 2 is indicated to have a failure condition, and the early fault diagnosis device 6 feeds back vibration overrun alarm information to the automatic control and measurement device 1.
And step S6, completing the durability test, performing disassembly analysis and failure part inspection on the electric drive axle 2, and evaluating weak parts and related factors influencing the durability by combining test data.
According to the test method provided by the embodiment of the invention, by applying the dual-motor drive axle durability test system in the first embodiment and editing the corresponding durability test program in the automatic control and measurement device 1 in combination with the road spectrum data, the dual-motor drive axle is subjected to durability test and rack calibration under the simulated road spectrum working condition, the calibration data can provide reliable basis for road test calibration of the dual-motor drive axle, the time for calibrating the whole vehicle is shortened, the product research and development period is efficiently shortened, the product quality is improved, and the cost is saved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A dual-motor drive bridge durability test system, comprising:
an automatic control and measurement device (1);
the electric drive system comprises an electric drive axle (2), wherein a first real vehicle motor (21) and a second real vehicle motor (22) are arranged on the electric drive axle (2), and the electric drive axle (2) comprises a first output end (23) and a second output end (24);
a motor control device (3) comprising a first motor controller (31) electrically connected to the first real vehicle motor (21) and a second motor controller (32) electrically connected to the second real vehicle motor (22), respectively, the motor control device (3) being communicatively connected to the automatic control and measurement device (1), the motor control device (3) being configured to control the output rotational speed and/or the output torque of the first real vehicle motor (21) and the second real vehicle motor (22); and
the loading dynamometer (4) comprises a first loading dynamometer (41) connected with the first output end (23) and a second loading dynamometer (42) connected with the second output end (24), the loading dynamometer (4) is in communication connection with the automatic control and measurement device (1), and the loading dynamometer (4) is configured to adjust the output torque of the electric drive axle (2).
2. The dual-motor electric drive bridge endurance testing system of claim 1, in which the motor control device (3) further comprises:
a battery simulator (33), the battery simulator (33) electrically connecting the first motor controller (31) and the second motor controller (32).
3. The dual-motor electric drive bridge endurance testing system of claim 1, further comprising:
a first cooling device (51), wherein the first cooling device (51) is connected with the first real vehicle motor (21) and the first motor controller (31);
a second cooling device (52), wherein the second cooling device (52) is connected with the second real vehicle motor (22) and the second motor controller (32).
4. The dual-motor electric drive bridge endurance testing system of claim 1, further comprising:
the early fault diagnosis device (6) is connected to the electric drive axle (2), the early fault diagnosis device (6) can collect vibration data of the electric drive axle (2), and the early fault diagnosis device (6) is in communication connection with the automatic control and measurement device (1).
5. The dual-motor electric drive bridge endurance testing system of claim 1, further comprising:
the gear control strategy device (7) is connected to the electric drive axle (2) and can control the electric drive axle (2) to shift gears, and the gear control strategy device (7) is in communication connection with the automatic control and measurement device (1).
6. The dual-motor electric drive bridge endurance testing system of claim 1, further comprising:
lubricating oil temperature control device (8), lubricating oil temperature control device (8) connect in electric drive axle (2) to can gather the lubricating oil temperature data of electric drive axle (2), lubricating oil temperature control device (8) communication is connected automatic control and measuring device (1).
7. The dual-motor electric drive axle endurance testing system of claim 1, in which said load dynamometer device (4) further comprises a first sensor (43) connected to said first output (23) and a second sensor (44) connected to said second output (24), respectively, said first sensor (43) and said second sensor (44) being adapted to measure an output speed and/or an output torque of said electric drive axle (2), respectively.
8. The dual-motor electric drive axle endurance testing system of claim 7, in which the load dynamometer device (4) further includes a first gearbox (45) connected to the first sensor (43) and a second gearbox (46) connected to the second sensor (44), respectively, the first gearbox (45) and the second gearbox (46) being used to adjust an output torque of the electric drive axle (2), respectively.
9. The dual-motor electric drive bridge endurance testing system of claim 8, further comprising:
the stall control device (9) comprises a first stall controller (91) connected with the first gearbox (45), a second stall controller (92) connected with the second gearbox (46) and a stall control module (93), and the stall control module (93) is in communication connection with the automatic control and measurement device (1) and can control the start and stop of the first stall controller (91) and the second stall controller (92).
10. A testing method applied to the dual-motor drive bridge durability testing system of any one of claims 1 to 9, comprising the following steps:
step S1, fixedly installing the dual-motor electric drive bridge durability test system on a test bench, and connecting a power cable and a communication cable;
step S2, carrying out power-on debugging on the dual-motor electric drive bridge durability test system;
step S3, editing test conditions, and inputting the automatic control and measurement device (1); the test conditions comprise various real vehicle working conditions, and a first characteristic point of the working rotating speed and a second characteristic point of the working torque of a first real vehicle motor (21) and a second real vehicle motor (22) are defined, wherein the first characteristic point comprises a rated rotating speed point, a highest working rotating speed point and a lowest working rotating speed point corresponding to rated power, and the second characteristic point comprises a rated torque point, a peak torque point, a rated power curve point and a peak power curve point;
step S4, carrying out running-in test on the electric drive axle (2) according to the test conditions, wherein the working rotating speed and the working torque during the running-in test are both 50% of the test conditions;
step S5, carrying out durability test on the electric drive axle (2) according to the test conditions;
and step S6, completing the durability test, performing disassembly analysis and failure part inspection on the electric drive axle (2), and evaluating parts and influencing factors influencing the durability by combining test data.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116337484A (en) * | 2023-05-30 | 2023-06-27 | 麦格纳动力总成(江西)有限公司 | Drive axle endurance test method, system, computer and readable storage medium |
-
2022
- 2022-03-09 CN CN202210222115.XA patent/CN114609520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116337484A (en) * | 2023-05-30 | 2023-06-27 | 麦格纳动力总成(江西)有限公司 | Drive axle endurance test method, system, computer and readable storage medium |
| CN116337484B (en) * | 2023-05-30 | 2023-09-26 | 麦格纳动力总成(江西)有限公司 | Drive axle endurance test method, system, computer and readable storage medium |
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