Endurance test system and method for rotating speed ring of electric drive assembly

Abstract

The invention provides a durability test system and method for a rotating speed ring of an electric drive assembly. The durability test system for the rotating speed ring of the electric drive assembly comprises a tool and a supporting base, wherein the top of the tool is provided with a plurality of damping and energy-consuming bases; the electric drive assembly is installed on the multiple damping and energy dissipation bases, and damping compressed springs are arranged on the damping and energy dissipation bases; the electric drive assembly operation control module is mounted on the tool; the test module is connected with the electric drive assembly operation control module, and the test module is used for inputting test parameters and a speed increasing and decreasing slope to the electric drive assembly operation control module; the electric drive assembly operation control module is used for controlling starting, stopping and the rotating speed of the electric drive assembly according to the test parameters and the speed increasing and decreasing slope. By controlling and slowing down rising and falling of the rotating speed of the electric drive assembly and reducing the updating interval of the slope of the rising and falling rotating speed, shaking generated by the electric drive assembly is reduced, and the reason is vibration generation. And secondly, based on the generation of the vibration which cannot be eliminated, the vibration is inhibited through an arranged tool.

Description

Technical Field

[0001] The present application relates to the technical field of electric drive controller research and development, and specifically to a system and method for testing the durability of an electric drive assembly speed ring. Background Art

[0002] In the electric drive assembly speed ring durability test, the stability of the electric drive assembly under the "high speed and low torque" working condition is particularly important. When the rotor is running at high speed, "dynamic balance abnormality" or "slight shaking" will occur, causing scratches with the stator, or the rotor may break due to the centrifugal force of the high speed of the rotor.

[0003] In the prior art, on the one hand, the existing electric drive assembly support and fixing device fails to effectively prevent and suppress the jitter that occurs when the electric drive assembly is working, which may cause slight losses or even abnormal conditions; on the other hand, in the electric drive assembly speed loop durability test, it is not considered that the control of the lifting and lowering speed slope will cause different degrees of jitter to the electric drive assembly support and fixing fixture, and the updating interval of the lifting and lowering speed slope is too large, resulting in the electric drive assembly speed rising process curve showing an obvious step shape, and the electric drive assembly produces obvious jitter, which is not conducive to the electric drive assembly speed loop durability test. Summary of the invention

[0004] The present application provides an electric drive assembly speed loop durability test system and method, which can solve the problems in the prior art electric drive assembly speed loop durability test, such as too large update interval of the speed slope, severe jitter of the electric drive assembly, and failure to effectively suppress the jitter of the electric drive assembly.

[0005] In a first aspect, a system for testing the speed loop durability of an electric drive assembly includes a tooling, which includes a supporting base with a plurality of shock-absorbing and energy-absorbing seats on the top; an electric drive assembly, which is installed on the plurality of shock-absorbing and energy-absorbing seats, and the shock-absorbing and energy-absorbing seats are provided with shock-absorbing compression springs; an electric drive assembly operation control module, which is installed on the tooling; a test module, which is connected to the electric drive assembly operation control module, and the test module is used to input test parameters and speed-up and speed-down slopes into the electric drive assembly operation control module; the electric drive assembly operation control module is used to control the start and stop and speed of the electric drive assembly according to the test parameters and the speed-up and speed-down slopes.

[0006] In combination with the first aspect, in one embodiment, a tooling plate is provided on the shock-absorbing and energy-absorbing seat; a plurality of shock-absorbing and energy-absorbing seats form a first area for installing the electric drive assembly, and the electric drive assembly is mounted on the plurality of shock-absorbing and energy-absorbing seats by corresponding connections with the tooling plate.

[0007] In combination with the first aspect, in one embodiment, the shock-absorbing energy-absorbing seat includes a shock-absorbing base plate, a fixed column and a mounting plate; the shock-absorbing base plate and the mounting plate are connected by a shock-absorbing compression spring, the fixed column is fixed to the shock-absorbing base plate, and the mounting plate is detachably connected to the support base; the tooling plate is arranged on the fixed column.

[0008] In combination with the first aspect, in one embodiment, the support base includes a support platform and a support cross column; two support cross columns are spaced apart on both sides of the bottom of the support platform to form a first space for the construction vehicle to enter and exit; and the mounting plate is detachably connected to the top of the support platform.

[0009] In combination with the first aspect, in one embodiment, screw grooves are arranged at intervals on the support platform; mounting holes are provided on the mounting plate, and bolts are passed through the mounting holes and arranged in the corresponding screw grooves to detachably connect the mounting plate to the support platform.

[0010] In combination with the first aspect, in one embodiment, it also includes an environmental chamber and an environmental module, the tooling is arranged in the environmental chamber, and the environmental chamber is used to provide the required testing environment for the tooling; the environmental module includes a battery simulator and a cooling circulating water machine; the positive and negative poles of the battery simulator are correspondingly connected to the electric drive assembly; the cooling circulating water machine is used to supply cooling water to the electric drive assembly.

[0011] In combination with the first aspect, in one embodiment, it also includes a data monitoring and processing module, which is used to calculate the speed increase and decrease slope; the test module includes a host computer and an instruction transmission module, the host computer is communicatively connected to the data monitoring and processing module and obtains the speed increase and decrease slope, and the host computer inputs the test parameters and the speed increase and decrease slope to the electric drive assembly operation control module through the instruction transmission module.

[0012] In combination with the first aspect, in one implementation, the data monitoring and processing module is connected to the host computer based on the NI OPC server communication; the host computer is connected to the instruction transmission module based on the TCP / IP protocol communication; the electric drive assembly operation control module and the instruction transmission module are based on CAN1 interface message communication; the environmental chamber and the instruction transmission module are based on CAN0 interface message communication; the cooling circulating water machine and the instruction transmission module are based on CAN2 interface message communication.

[0013] In combination with the first aspect, in one embodiment, the host computer is used to obtain the current status values ​​of the environmental chamber, the cooling circulating water machine and the tooling, and pass the current status values ​​to the data monitoring and processing module; the data monitoring and processing module is used to process the current status values ​​and pass the fault code to the host computer, and the host computer controls the start and stop of the electric drive assembly and the working status of the environmental module based on the fault code.

[0014] In the second aspect, an embodiment of the present application provides an electric drive assembly speed loop durability test method, which includes: based on the test requirements and speed increase and decrease slopes of the electric drive assembly speed loop durability test system, selecting an operating mode and setting test parameters, and starting a speed loop durability test on the electric drive assembly in the tooling; the test module transmits the operating mode and test parameters to the electric drive assembly operation control module, and the electric drive assembly operation control module controls the start and stop and speed of the electric drive assembly based on the test parameters and the speed increase and decrease slopes; acquiring the current status of the environmental module and the electric drive assembly in real time, and immediately sending a speed reduction command to stop the electric drive assembly speed loop durability test if an abnormality is identified.

[0015] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0016] The embodiment of the present application provides a system and method for testing the durability of a speed ring of an electric drive assembly, wherein a support base provides stable support, and a plurality of shock-absorbing and energy-absorbing seats arranged on the top of the support base are used to install the electric drive assembly, which protects the stator and the rotor to a certain extent by reducing the probability of the electric drive assembly shaking, avoiding scratches between the stator and the rotor, and improving the safety and accuracy of the test. The electric drive assembly installed on the shock-absorbing and energy-absorbing seat is responsible for providing power and performing performance tests, and its design ensures effective operation under high speed and low torque conditions; the shock-absorbing compression spring installed on the shock-absorbing and energy-absorbing seat 2 can absorb and alleviate the adverse effects caused by vibration or impact based on the vibration of the electric drive assembly, further improving the safety and stability of the test. The control module installed on the tooling is responsible for monitoring and adjusting the operating state of the electric drive assembly to ensure its accuracy and higher response speed during the test process. The test module is connected to the operation control module to receive the test parameters and the speed increase and decrease slope input by the user. The design of this module ensures flexibility, so that various tests can be carried out under different conditions. The vibration problem of the electric drive assembly is solved from two aspects. First, by controlling and slowing down the rise and fall of the electric drive assembly speed, the update interval of the rise and fall speed slope is reduced, thereby reducing the jitter generated by the electric drive assembly, which is the cause of the vibration; on the other hand, based on the generation of vibration and the inability to eliminate this jitter, the vibration is suppressed by setting up tooling. This solves the problem that in the durability test of the electric drive assembly speed ring in the prior art, the update interval of the rise and fall speed slope is too large, the electric drive assembly jitters violently, and the jitter of the electric drive assembly is not effectively suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the tooling structure in the embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the structure of the support base and the shock-absorbing and energy-absorbing seat in the embodiment of the present application;

[0019] Figure 3This is a schematic diagram of the structure of the shock-absorbing and energy-absorbing seat in the embodiment of the present application;

[0020] Figure 4 This is a structural diagram of the electric drive assembly speed loop test system in an embodiment of the present application.

[0021] In the figure: 1. Electric drive assembly; 2. Shock-absorbing energy-absorbing seat; 21. Shock-absorbing base plate; 22. Fixed column; 23. Mounting plate; 231. Mounting hole 3. Support base; 31. Support platform; 32. Support cross column; 4. Shock-absorbing compression spring; 5. First space; 6. Screw slot; 7. Tooling plate. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0024] Based on the durability test of the speed loop of the electric drive assembly 1, the stability of the electric drive assembly 1 under the "high speed and low torque" working condition is particularly important. When the rotor is running at high speed, "dynamic balance abnormality" or "slight shaking" will occur, resulting in scratches with the stator, or the centrifugal force of the high speed of the rotor will cause the rotor to crack. Since the existing support and fixing device of the electric drive assembly 1 does not effectively prevent and suppress the shaking that occurs when the electric drive assembly 1 is working, it will cause slight losses or even abnormal conditions. In addition, in the durability test of the speed loop of the electric drive assembly 1, it is not considered that the control of the speed slope will cause different degrees of shaking to the support and fixing tooling of the electric drive assembly 1. The update interval of the speed slope is too large, resulting in the electric drive assembly 1 speed rising process curve showing an obvious step shape, and the electric drive assembly 1 has obvious shaking, which is not conducive to the durability test of the speed loop of the electric drive assembly 1. Then a test system is designed, which includes a set of equipment that can effectively suppress the jitter that occurs when the electric drive assembly 1 is working. For the system, a control module is designed to control and slow down the increase and decrease of the speed of the electric drive assembly 1, and reduce the update interval of the increase and decrease speed slope, thereby reducing the jitter generated by the electric drive assembly 1; it can solve the problems of excessively large update interval of the increase and decrease speed slope in the durability test of the speed loop of the electric drive assembly 1 in the prior art, severe jitter of the electric drive assembly 1, and failure to effectively suppress the jitter of the electric drive assembly 1.

[0025] In the first aspect, the present application embodiment provides an electric drive assembly speed ring durability test system, referring to Figure 1-4 , Figure 1 Schematic diagram of the tooling structure of the embodiment of the present application. Figure 1 As shown, a system for testing the speed ring durability of an electric drive assembly comprises: a tooling, comprising a supporting base 3 with a plurality of shock-absorbing and energy-absorbing seats 2 on the top; an electric drive assembly 1, which is installed on the plurality of shock-absorbing and energy-absorbing seats 2, and a shock-absorbing compression spring 4 is provided on the shock-absorbing and energy-absorbing seat 2; an electric drive assembly operation control module, which is installed on the tooling; a test module, which is connected to the electric drive assembly operation control module, and the test module is used to input test parameters and speed-up and speed-down slopes into the electric drive assembly operation control module; the electric drive assembly operation control module is used to control the start and stop and speed of the electric drive assembly 1 according to the test parameters and the speed-up and speed-down slopes.

[0026] Through this system design, the support base 3 provides stable support, and multiple shock-absorbing and energy-absorbing seats 2 arranged on the top of the support base 3 are used to install the electric drive assembly 1. By reducing the probability of the electric drive assembly 1 shaking, it protects the stator and rotor to a certain extent, avoids scratches between the stator and the rotor, and improves the safety and accuracy of the test. The electric drive assembly installed on the shock-absorbing and energy-absorbing seat is responsible for providing power and performing performance tests. Its design ensures effective operation under high speed and low torque conditions; the shock-absorbing compression spring 4 installed on the shock-absorbing and energy-absorbing seat 2 can absorb and alleviate the adverse effects caused by vibration or impact based on the vibration of the electric drive assembly 1, further improving the safety and stability of the test. The control module installed on the tooling is responsible for monitoring and adjusting the operating status of the electric drive assembly 1 to ensure its accuracy and higher response speed during the test process. The test module is connected to the operation control module to receive the test parameters and speed increase and decrease slopes input by the user. The design of this module ensures flexibility, allowing various tests to be carried out under different conditions. The vibration problem of the electric drive assembly is solved from two aspects. First, by controlling and slowing down the speed of the electric drive assembly 1, the update interval of the speed slope is reduced, thereby reducing the jitter generated by the electric drive assembly, which is the cause of the vibration; on the other hand, based on the vibration and the inability to eliminate this jitter, the vibration is suppressed by setting a tool. This solves the problem that in the durability test of the speed ring of the electric drive assembly 1 in the prior art, the update interval of the speed slope is too large, the electric drive assembly 1 shakes violently, and the jitter of the electric drive assembly 1 is not effectively suppressed.

[0027] Furthermore, in one embodiment, a tooling plate 7 is provided on the shock-absorbing and energy-absorbing seat 2; a plurality of shock-absorbing and energy-absorbing seats 2 form a first area for installing the electric drive assembly 1, and the electric drive assembly 1 is mounted on the plurality of shock-absorbing and energy-absorbing seats 2 by correspondingly connecting with the tooling plate 7.

[0028] In this embodiment, in order to further enhance the shock absorption effect and installation convenience, for electric drive assemblies 1 of different models and sizes, tooling plates 21 of different shapes and sizes can be installed on the shock absorption and energy-absorbing seat 2 based on the electric drive assembly 1 itself; the tooling plate 21 is intended to provide an intermediary structure to make the connection between the electric drive assembly 1 and the shock absorption and energy-absorbing seat 2 more flexible. This design can effectively alleviate the vibration generated during the operation of the electric drive assembly 1 and reduce its direct transmission to the shock absorption and energy-absorbing seat 2. The tooling plate 21 can be made of a certain elastic material, such as rubber or polyurethane, to enhance its shock absorption ability, and further reduce the vibration generated by the electric drive assembly 1 by absorbing and dissipating vibration energy. The electric drive assembly 1 is mounted on multiple shock absorption and energy-absorbing seats 2, which can achieve a more uniform load distribution and reduce the overall instability caused by local vibration. Through this reasonable design and improvement, the combination of the tooling plate 21 and the shock absorption and energy-absorbing seat 2 can effectively improve the seismic performance of the electric drive assembly 1, reduce the impact of vibration on the components and the system as a whole, thereby enhancing the use performance and improving the test safety.

[0029] Furthermore, in one embodiment, the shock-absorbing energy-absorbing seat 2 includes a shock-absorbing base plate 21, a fixed column 22 and a mounting plate 23; the shock-absorbing base plate 21 and the mounting plate 23 are connected by a shock-absorbing compression spring 4, the fixed column 22 is fixed on the shock-absorbing base plate 21, and the mounting plate 23 is detachably connected to the support base 3; the tooling plate 7 is arranged on the fixed column 22.

[0030] In this embodiment, the main function of the shock-absorbing base plate 21 is to serve as a supporting structure, to withstand the vibration from the electric drive assembly 1 and transmit it to the shock-absorbing compression spring 4. The base plate can be made of a composite material with certain elasticity and strength to effectively absorb and disperse the vibration; the fixed column 22 is connected to the shock-absorbing base plate 21, and plays the role of supporting and connecting the electric drive assembly 1, ensuring the stability of the entire shock-absorbing energy-absorbing seat. The shock-absorbing compression spring 4 is connected between the shock-absorbing base plate 21 and the mounting plate 23, and is mainly used to reduce vibration transmission, thereby providing a better shock isolation effect. The shock-absorbing compression spring 4 can produce elastic deformation, disperse and absorb impact force when affected by external vibration. According to the different vibration frequencies and amplitudes, the shock-absorbing compression spring 4 with appropriate stiffness and materials is selected. The mounting plate is used to fix the shock-absorbing energy-absorbing seat 21, so that the shock-absorbing energy-absorbing seat 2 can be detachably connected to the support base 3 by bolts or the like. Through the above settings, the performance of the shock-absorbing energy-absorbing seat 2 can be further improved, ensuring that the electric drive assembly 1 can still maintain stable and efficient testing under various complex working conditions.

[0031] Furthermore, in one embodiment, the support base 3 includes a support platform 31 and a support cross column 32; two support cross columns 32 are spaced apart on both sides of the bottom of the support platform 31 to form a first space 5 for the construction vehicle to enter and exit; the mounting plate 23 is detachably connected to the top of the support platform 31.

[0032] In this embodiment, the structure of the support base 3 includes a support platform 31 and a support cross column 32. This design provides a convenient space for the construction vehicle to enter and exit, and forms a detachable connection with the mounting plate 23. The support platform 31 provides basic support for the entire structure, carrying the components and equipment installed thereon. Two support cross columns 32 are arranged on both sides of the bottom of the support platform 31, which enhances the overall stability and rigidity and prevents the support platform 31 from deforming under load. The spacing design of the support cross columns 32 provides sufficient space to ensure that the construction vehicle can smoothly enter and exit the first space 5, thereby improving the convenience of use; the mounting plate 23 can be disassembled as needed to facilitate the maintenance and replacement of the equipment. This design provides flexibility, allowing for quick adjustments in different scenarios or needs.

[0033] Furthermore, in one embodiment, screw grooves 6 are arranged at intervals on the support platform 31 ; mounting holes 231 are provided on the mounting plate 23 , and bolts are passed through the mounting holes 231 and are arranged in corresponding screw grooves 6 , so that the mounting plate 23 is detachably connected to the support platform 31 .

[0034] In this embodiment, the screw slot 6 is set on the support platform 31, providing a linear connection method so that the mounting plate 23 can be flexibly positioned. This design allows the user to adjust in different positions, which improves the flexibility of assembly. The mounting hole 231 is set on the mounting plate 23 and used in conjunction with the screw slot 6, so that the mounting plate 23 can be firmly fixed to the support platform 31 by bolts. The fixing method of the bolts ensures the stability of the mounting plate 23 and withstands the force generated by the vibration during use; the detachable design allows for quick and convenient operation when maintenance, upgrading or replacement of equipment is required, saving time and labor costs. The connection between the screw slot 6 and the mounting hole 231 is designed to ensure convenience during assembly without affecting the stability of the connection.

[0035] Furthermore, in one embodiment, it also includes an environmental chamber and an environmental module, the tooling is arranged in the environmental chamber, and the environmental chamber is used to provide the required testing environment for the tooling; the environmental module includes a battery simulator and a cooling circulating water machine; the positive and negative poles of the battery simulator are correspondingly connected to the electric drive assembly 1; the cooling circulating water machine is used to supply cooling water to the electric drive assembly 1.

[0036] In this embodiment, the environmental chamber provides a closed and adjustable environment for the tooling, which can simulate various working conditions such as temperature and humidity, and effectively test the equipment. Its structure can resist interference from the external environment and ensure the accuracy of the test. The battery simulator is directly connected to the positive and negative electrodes of the electric drive assembly 1. The battery simulator can simulate various battery states and is used to test the performance of the electric drive assembly under different power and voltage conditions; the setting of the cooling circulating water machine allows the system to maintain a suitable operating temperature during the test, preventing the electric drive assembly 1 from overheating and causing performance degradation or damage, and ensuring the reliability of the test data.

[0037] Furthermore, in one embodiment, it also includes a data monitoring and processing module, which is used to calculate the speed increase and decrease slope; the test module includes a host computer and an instruction transmission module, the host computer is communicatively connected to the data monitoring and processing module and obtains the speed increase and decrease slope, and the host computer inputs the test parameters and the speed increase and decrease slope to the electric drive assembly operation control module through the instruction transmission module.

[0038] In this embodiment, the main function of the data monitoring and processing module is to calculate the speed increase and decrease slope, which is very important for testing the performance of the electric drive assembly 1 under acceleration and deceleration conditions, and to analyze the data in real time. The host computer is responsible for communicating with the data monitoring and processing module and obtaining the speed increase and decrease slope from it. It is the control center of the system and can adjust the test process in real time. The instruction transmission module is responsible for transmitting the test parameters and speed increase and decrease slope generated by the host computer to the operation control module of the electric drive assembly to ensure that the electric drive assembly can work according to the real-time analysis results. The data monitoring and processing module can analyze the data in real time, so that the operating parameters of the electric drive assembly can be adjusted during the test process to obtain more accurate test results. By calculating the speed increase and decrease slope, the host computer can dynamically adjust the test conditions to evaluate the performance of the electric drive assembly in the best way. It is important to know that it is necessary to ensure that the data monitoring and processing module has sufficient acquisition frequency to support accurate data monitoring under rapidly changing working conditions.

[0039] Furthermore, in one embodiment, the data monitoring and processing module is connected to the host computer based on the NIOPC server communication; the host computer is connected to the instruction transmission module based on the TCP / IP protocol communication; the electric drive assembly operation control module is connected to the instruction transmission module based on the CAN1 interface message communication; the environmental chamber is connected to the instruction transmission module based on the CAN0 interface message communication; the cooling circulating water machine is connected to the instruction transmission module based on the CAN2 interface message communication.

[0040] In this embodiment, the data monitoring and processing module adopts the NIOPC server, which provides a standardized communication protocol, so that devices from different manufacturers can easily exchange data and enhance the interoperability of the system. The host computer communicates with the instruction transmission module through the TCP / IP protocol, so that the data transmission has high stability and flexibility, and supports long-distance communication and distributed system architecture. The instruction transmission module communicates with the electric drive assembly operation control module through the CAN1 interface, communicates with the environmental chamber through the CAN0 interface, and communicates with the cooling circulating water machine through the CAN2 interface. It uses CAN bus technology, has high anti-interference ability and real-time communication characteristics, receives the instructions of the host computer and converts them into a communication format suitable for each downstream device, and is responsible for data distribution. The design of the entire system enables real-time response to data transmission and command execution, which is suitable for tests that require dynamic performance, and the system is easier to expand and integrate new hardware devices.

[0041] Furthermore, in one embodiment, the host computer is used to obtain the current status values ​​of the environmental chamber, the cooling circulating water machine and the tooling, and pass the current status values ​​to the data monitoring and processing module; the data monitoring and processing module is used to process the current status values ​​and pass the fault code to the host computer, and the host computer controls the start and stop of the electric drive assembly and the working status of the environmental module based on the fault code.

[0042] In this embodiment, the host computer obtains the current state values ​​of the environmental box, cooling circulating water machine and tooling, including monitoring data such as temperature, humidity, pressure, and water volume. The data monitoring and processing module processes the current state values ​​of the environmental box, cooling circulating water machine and tooling received from the host computer, determines whether there is a fault, generates a fault code, and transmits the fault code back to the host computer; the host computer receives and processes the fault code sent by the data monitoring and processing module, and controls the start and stop state of the electric drive assembly and the working state of the environmental module according to the fault code; the host computer periodically or according to the trigger condition requests the current state value from the environmental box, cooling circulating water machine and tooling, and each submodule feeds back its state value to the host computer; the data monitoring and processing module analyzes these state values, and if an abnormal state exceeding the set threshold is detected, it is determined to be a fault. Through fast data transmission and processing mechanisms, real-time monitoring and fault response can be achieved. Through environmental monitoring and fault detection mechanisms, it is ensured that the electric drive assembly and related facilities operate in a safe and stable state to reduce potential damage.

[0043] Secondly, a method for endurance testing of a speed loop of an electric drive assembly is proposed, which includes selecting an operating mode and setting test parameters based on the test requirements and speed increase and decrease slopes of the electric drive assembly speed loop endurance testing system, and starting a speed loop endurance test on the electric drive assembly in the tooling; the test module transmits the operating mode and test parameters to the electric drive assembly operation control module, and the electric drive assembly operation control module controls the start and stop and speed of the electric drive assembly based on the test parameters and speed increase and decrease slopes; the current status of the environmental module and the electric drive assembly is obtained in real time, and a speed reduction command is immediately sent to stop the endurance test of the speed loop of the electric drive assembly if an abnormality is identified.

[0044] Through this test method, the purpose of the test is clarified, and appropriate operating modes such as constant speed mode, acceleration mode, deceleration mode, and cyclic acceleration and deceleration mode are selected according to the functions and working conditions to be achieved by the test; the duration of each test stage is determined to record the performance of the system under different conditions. The ramp-up and ramp-down slopes are set, which affect the speed of acceleration and deceleration of the electric drive assembly 1, and usually need to be adjusted according to the design specifications of the product. The electric drive assembly 1 is enabled, and the speed loop durability test is started according to the selected operating mode and the set ramp-up and ramp-down slopes. Real-time data is continuously observed, and abnormal conditions are monitored through the set thresholds. Once abnormal conditions are detected, a deceleration command is immediately issued to control the electric drive assembly 1 to gradually reduce the speed. Finally, the electric drive assembly is safely stopped to prevent damage to the equipment. During the test, all important test data are recorded, including running time, speed changes, abnormal events and their corresponding environmental data; the above steps outline a systematic electric drive assembly speed loop durability test method, covering all aspects from test requirements analysis to abnormal response. Through this method, the electric drive assembly 1 can be effectively evaluated.

[0045] The beneficial effects brought by the present invention include:

[0046] The support base 3 provides stable support. Multiple shock-absorbing and energy-absorbing seats 2 arranged on the top of the support base 3 are used to install the electric drive assembly 1. By reducing the probability of the electric drive assembly 1 shaking, it protects the stator and rotor to a certain extent, avoids scratches between the stator and the rotor, and improves the safety and accuracy of the test. The electric drive assembly installed on the shock-absorbing and energy-absorbing seat is responsible for providing power and performing performance tests. Its design ensures effective operation under high speed and low torque conditions; the shock-absorbing compression spring 4 installed on the shock-absorbing and energy-absorbing seat 2 can absorb and alleviate the adverse effects caused by vibration or impact based on the vibration of the electric drive assembly 1, further improving the safety and stability of the test. The control module installed on the tooling is responsible for monitoring and adjusting the operating status of the electric drive assembly 1 to ensure its accuracy and higher response speed during the test process. The test module is connected to the operation control module to receive the test parameters and speed increase and decrease slopes input by the user. The design of this module ensures flexibility, allowing various tests to be carried out under different conditions. The vibration problem of the electric drive assembly is solved from two aspects. First, by controlling and slowing down the speed of the electric drive assembly 1, the update interval of the speed slope is reduced, thereby reducing the jitter generated by the electric drive assembly, which is the cause of the vibration; on the other hand, based on the vibration and the inability to eliminate this jitter, the vibration is suppressed by setting a tool. This solves the problem that in the durability test of the speed ring of the electric drive assembly 1 in the prior art, the update interval of the speed slope is too large, the electric drive assembly 1 shakes violently, and the jitter of the electric drive assembly 1 is not effectively suppressed.

[0047] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0048] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0049] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0050] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0051] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0052] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0053] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electric drive assembly speed ring durability test system, characterized in that: It includes: The tooling comprises a support base (3) with a plurality of shock-absorbing and energy-absorbing seats (2) provided on the top; An electric drive assembly (1) is mounted on a plurality of the shock-absorbing and energy-absorbing seats (2), and a shock-absorbing compression spring (4) is provided on the shock-absorbing and energy-absorbing seats (2); An electric drive assembly operation control module, which is installed on the tooling; A test module is connected to the electric drive assembly operation control module, and the test module is used to input test parameters and acceleration and deceleration slopes into the electric drive assembly operation control module; the electric drive assembly operation control module is used to control the start and stop and speed of the electric drive assembly according to the test parameters and the acceleration and deceleration slopes.

2. The electric drive assembly speed ring durability test system according to claim 1, characterized in that: The shock-absorbing and energy-absorbing seat (2) is provided with a tooling plate (7); The plurality of shock-absorbing and energy-absorbing seats (2) form a first area for installing the electric drive assembly (1), and the electric drive assembly (1) is mounted on the plurality of shock-absorbing and energy-absorbing seats (2) by correspondingly connecting with the tooling plate (7).

3. The electric drive assembly speed ring durability test system according to claim 2, characterized in that: The shock-absorbing energy-absorbing seat (2) comprises a shock-absorbing base plate (21), a fixing column (22) and a mounting plate (23); The shock-absorbing base plate (21) and the mounting plate (23) are connected via the shock-absorbing compression spring (4), the fixing column (22) is fixed on the shock-absorbing base plate (21), and the mounting plate (23) and the supporting base (3) are detachably connected; The tooling plate (7) is arranged on the fixing column (22).

4. The electric drive assembly speed ring durability test system according to claim 3, characterized in that: The support base (3) comprises a support platform (31) and a support cross column (32); The two supporting cross columns (32) are spaced apart on both sides of the bottom of the supporting platform (31) to form a first space (5) for construction vehicles to enter and exit; The mounting plate (23) is detachably connected to the top of the supporting platform (31).

5. The electric drive assembly speed ring durability test system according to claim 4, characterized in that: The support platform (31) is provided with screw grooves (6) at intervals; The mounting plate (23) is provided with a mounting hole (231), and a bolt is passed through the mounting hole (231) and is arranged in the corresponding screw groove (6), so that the mounting plate (23) is detachably connected to the supporting platform (31).

6. The electric drive assembly speed ring durability test system according to claim 1, characterized in that: It also includes an environmental box and an environmental module, the tooling is arranged in the environmental box, and the environmental box is used to provide the required test environment for the tooling; The environmental module includes a battery simulator and a cooling water circulation machine; The positive electrode and the negative electrode of the battery simulator are connected to the electric drive assembly (1) correspondingly; The cooling circulating water machine is used to supply cooling water to the electric drive assembly (1).

7. The electric drive assembly speed ring durability test system according to claim 1, characterized in that: It also includes a data monitoring and processing module, which is used to calculate the speed increase and decrease slope; The test module includes a host computer and an instruction transmission module. The host computer is communicatively connected to the data monitoring and processing module and obtains the speed increase and decrease slope. The host computer inputs the test parameters and the speed increase and decrease slope to the electric drive assembly operation control module through the instruction transmission module.

8. The electric drive assembly speed ring durability test system according to claim 6 or 7, characterized in that: The data monitoring processing module is connected to the host computer based on the NIOPC server communication; The host computer and the instruction transmission module are connected based on TCP / IP protocol communication; The electric drive assembly operation control module communicates with the command transmission module based on CAN1 interface messages; The environmental box and the instruction transmission module communicate based on CAN0 interface messages; The cooling circulating water machine communicates with the instruction transmission module based on CAN2 interface messages.

9. The electric drive assembly speed ring durability test system according to claim 6 or 7, characterized in that: The host computer is used to obtain the current state values ​​of the environmental box, the cooling circulating water machine and the tooling, and transmit the current state values ​​to the data monitoring and processing module; The data monitoring and processing module is used to process the current state value and transmit the fault code to the host computer, and the host computer controls the start and stop of the electric drive assembly and the working state of the environmental module based on the fault code.

10. A method for testing the durability of a speed ring of an electric drive assembly, characterized in that: It includes: Based on the test requirements and the speed increase and decrease slope of the electric drive assembly speed ring durability test system, the operation mode is selected and the test parameters are set to start the speed ring durability test of the electric drive assembly in the tooling; The test module transmits the operation mode and the test parameters to the electric drive assembly operation control module, and the electric drive assembly operation control module controls the start and stop and the speed of the electric drive assembly based on the test parameters and the speed increase and decrease slope; The current status of the environmental module and the electric drive assembly is acquired in real time. If an abnormality is identified, a speed reduction command is immediately sent to stop the electric drive assembly speed loop durability test.

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