Test method and device of electric drive system, storage medium and electronic equipment

Abstract

The invention discloses a test method and device of an electric drive system, a storage medium and electronic equipment. The method comprises the steps that a first circuit structure parameter and a second circuit structure parameter of the electric drive system are obtained, the first circuit structure parameter is used for representing a circuit structure parameter of the electric drive system in a normal operation state, and the second circuit structure parameter is used for representing a circuit structure parameter of the electric drive system in an abnormal operation state; constructing a simulation model of the electric drive system based on the first circuit structure parameter and the second circuit structure parameter; in the operation process of the simulation model, adjusting the model structure of the simulation model to obtain a first simulation parameter and a second simulation parameter of the simulation model; and testing the circuit structure of the electric drive system based on the first simulation parameter and the second simulation parameter to obtain a test result. The technical problem that the safety of an electric drive system in the related technology is low is solved.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more specifically, to a test method, apparatus, storage medium, and electronic device for an electric drive system. Background Technology

[0002] As a bridge for electrical energy conversion, the stability and safety of a vehicle's electric drive system directly affect the overall operational safety of the vehicle. Traditional electric drive systems often employ passive protection measures, such as overvoltage protection and cooling systems, when faced with sudden failures. However, this approach is insufficient to handle all operating conditions. In particular, when the electric drive system enters an active short circuit (ASC) state, the voltage across the capacitors can rapidly rise to dangerous levels, and the module junction temperature can increase dramatically. This results in relatively low safety for electric drive systems in related technologies.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This application provides a testing method, apparatus, storage medium, and electronic device for an electric drive system, to at least address the technical problem of low safety in electric drive systems in related technologies.

[0005] According to one aspect of the embodiments of this application, a testing method for an electric drive system is provided, comprising: acquiring first circuit structure parameters and second circuit structure parameters of the electric drive system, wherein the first circuit structure parameters represent the circuit structure parameters of the electric drive system under normal operating conditions, and the second circuit structure parameters represent the circuit structure parameters of the electric drive system under abnormal operating conditions; constructing a simulation model of the electric drive system based on the first circuit structure parameters and the second circuit structure parameters, wherein the simulation model is used to simulate the normal operating conditions and abnormal operating conditions of the electric drive system; adjusting the model structure of the simulation model during the simulation model operation to obtain first simulation parameters and second simulation parameters of the simulation model, wherein the first simulation parameters represent the simulation parameters output before the simulation model adjustment, and the second simulation parameters represent the simulation parameters output after the simulation model adjustment; and testing the circuit structure of the electric drive system based on the first simulation parameters and the second simulation parameters to obtain test results, wherein the test results are used to indicate whether there is a target risk in the electric drive system under abnormal operating conditions.

[0006] Furthermore, during the simulation model's operation, the model structure is adjusted to obtain the first and second simulation parameters of the simulation model. This includes: acquiring the first simulation parameters of the simulation model during its operation; adjusting the model structure based on preset short-circuit parameters to obtain a model structure adjustment result, wherein the model structure adjustment result indicates whether the simulation model successfully simulates the short-circuit scenario of the electric drive system; and acquiring the second simulation parameters of the simulation model in response to the model structure adjustment result indicating that the simulation model successfully simulates the short-circuit scenario of the electric drive system.

[0007] Furthermore, based on the first simulation parameters and the second simulation parameters, the circuit structure of the electric drive system is tested to obtain test results, including: comparing the first simulation parameters and the second simulation parameters to obtain comparison results, wherein the comparison results are used to indicate whether the target structure in the electric drive system meets the preset conditions; in response to the comparison results indicating that the target structure in the electric drive system meets the preset conditions, the test result is determined to indicate that the electric drive system has a target risk when it is in an abnormal operating state; in response to the comparison results indicating that the target structure in the electric drive system does not meet the preset conditions, the test result is determined to indicate that the electric drive system does not have a target risk when it is in an abnormal operating state.

[0008] Furthermore, the first simulation parameter and the second simulation parameter are compared to obtain the comparison result, including: determining the first temperature of the target structure in the first simulation parameter and the second temperature of the target structure in the second simulation parameter; determining the temperature difference between the first temperature and the second temperature; in response to the temperature difference being within a preset temperature difference range, determining the comparison result that the target structure in the electric drive system meets the preset conditions; in response to the temperature difference not being within the preset temperature difference range, determining the comparison result that the target structure in the electric drive system does not meet the preset conditions.

[0009] Further, obtaining the first circuit structure parameters and the second circuit structure parameters of the electric drive system includes: obtaining the first circuit structure parameters; and short-circuiting the electric drive system based on the first circuit structure parameters to obtain the second circuit structure parameters.

[0010] Furthermore, the method also includes: responding to the test result indicating that the electric drive system has a target risk under abnormal operating conditions, adjusting the first circuit structure parameters based on a preset adjustment strategy to obtain the third circuit structure parameters, and determining the fourth circuit structure parameters, wherein the fourth circuit result parameters are used to represent the circuit structure parameters of the electric drive system under abnormal operating conditions after adjusting the third circuit structure parameters; using the third circuit structure parameters as the first circuit structure parameters and the fourth circuit structure parameters as the second circuit structure parameters, and constructing a simulation model of the electric drive system based on the first circuit structure parameters and the second circuit structure; adjusting the model structure of the simulation model during the simulation model operation to obtain the first simulation parameters and the second simulation parameters of the simulation model; testing the circuit results of the electric drive system based on the first simulation parameters and the second simulation parameters to obtain test results until the test results indicate that the electric drive system does not have a target risk under abnormal operating conditions.

[0011] Furthermore, the method also includes: in response to the test result that there is no target risk in the case that the electric drive system is in an abnormal operating state, constructing the target circuit structure of the electric drive system based on the first circuit structure parameters.

[0012] According to another aspect of the embodiments of this application, a testing apparatus for an electric drive system is also provided, comprising: an acquisition module, configured to acquire first circuit structure parameters and second circuit structure parameters of the electric drive system, wherein the first circuit structure parameters represent the circuit structure parameters of the electric drive system under normal operating conditions, and the second circuit structure parameters represent the circuit structure parameters of the electric drive system under abnormal operating conditions; a construction module, configured to construct a simulation model of the electric drive system based on the first circuit structure parameters and the second circuit structure parameters, wherein the simulation model is used to simulate the normal operating conditions and abnormal operating conditions of the electric drive system; a running module, configured to adjust the model structure of the simulation model during the running of the simulation model to obtain first simulation parameters and second simulation parameters of the simulation model, wherein the first simulation parameters represent the simulation parameters output before the adjustment of the simulation model, and the second simulation parameters represent the simulation parameters output after the adjustment of the simulation model; and a testing module, configured to test the circuit structure of the electric drive system based on the first simulation parameters and the second simulation parameters to obtain test results, wherein the test results are used to indicate whether there is a target risk in the electric drive system under abnormal operating conditions.

[0013] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention during runtime.

[0014] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0015] According to another aspect of the embodiments of the present application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0016] According to another aspect of the embodiments of this application, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods in various embodiments of the present invention.

[0017] According to another aspect of the embodiments of this application, a computer program is also provided, which, when executed by a processor, implements the methods of various embodiments of the present invention.

[0018] This application provides a testing method for an electric drive system. The method first obtains first and second circuit structure parameters of the electric drive system. Then, based on these parameters, a simulation model of the electric drive system is constructed. During the simulation model's operation, the model structure is adjusted to obtain first and second simulation parameters. Finally, based on these parameters, the circuit structure of the electric drive system is tested to obtain test results. These test results indicate whether the electric drive system poses a target risk under abnormal operating conditions. This application first collects the first circuit structure parameters of the electric drive system under normal conditions and the second circuit structure parameters under abnormal conditions. Then, using these parameters, a simulation model of the electric drive system is constructed in a simulation environment. During the simulation model's operation and adjustment, the simulation parameters under different model structures—namely, the first and second simulation parameters—are output and compared to dynamically adjust the model structure and improve parameter configuration. Finally, based on the first and second simulation parameters, the circuit structure of the electric drive system is tested to obtain test results, assessing the safety of the electric drive system under abnormal operating conditions and ensuring the absence of a target risk. This application adopts a simulation-driven design adjustment method. By constructing and adjusting the simulation model of the electric drive system, it achieves the purpose of identifying and avoiding risks under abnormal operating conditions in advance, thereby achieving the technical effect of significantly improving the safety and reliability of the electric drive system, and thus solving the technical problem of low safety of electric drive systems in related technologies. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a flowchart of a test method for an electric drive system according to an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of an electric drive system according to an embodiment of this application;

[0022] Figure 3 This is a circuit diagram of an active short-circuit operating state according to an embodiment of this application;

[0023] Figure 4 This is a waveform result diagram according to an embodiment of this application;

[0024] Figure 5 This is a partially enlarged simulation result according to an embodiment of this application;

[0025] Figure 6 This is a simulation result diagram of the junction temperature of an active short-circuit process module according to an embodiment of this application;

[0026] Figure 7 This is a simulation result of the junction temperature of a module in another active short-circuit process according to an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of a test apparatus for an electric drive system according to an embodiment of this application. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] According to an embodiment of this application, an embodiment of a testing method for an electric drive system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0031] Figure 1 This is a flowchart of a test method for an electric drive system according to an embodiment of this application, such as... Figure 1 As shown, the method includes the following steps:

[0032] Step S102: Obtain the first circuit structure parameters and the second circuit structure parameters of the electric drive system, wherein the first circuit structure parameters are used to represent the circuit structure parameters of the electric drive system under normal operating conditions, and the second circuit structure parameters are used to represent the circuit structure parameters of the electric drive system under abnormal operating conditions.

[0033] The aforementioned electric drive system refers to a power transmission system that converts electrical energy into kinetic energy. The core components of an electric drive system may include, but are not limited to, a motor, inverter (or electronic control unit), DC power supply, and bus capacitors. The specific electric drive system needs to be determined based on the actual type of electric drive system. The function of the electric drive system is to control the motor's speed and torque to adapt to different driving needs of the vehicle.

[0034] The aforementioned normal operating state refers to the state in which the electric drive system operates efficiently and stably according to design requirements under the expected working conditions and within the expected range. At this time, the input power supply is stable, and the current, voltage, temperature, and other parameters of the motor are all within safe ranges, allowing the system to achieve the predetermined drive and control functions.

[0035] The aforementioned abnormal operating states refer to unexpected operating states of the electric drive system. These abnormal operating states may include, but are not limited to, unexpected states such as short circuit, overload, open circuit, overvoltage, overcurrent, and overheating. The specific abnormal operating state needs to be determined based on the actual abnormal situation of the electric drive system. Under abnormal operating states, the electric drive system cannot function normally and may even cause damage to the system or personnel. For example, when the bus voltage exceeds a set threshold, the system will enter active short-circuit protection mode to prevent further damage.

[0036] The aforementioned first circuit structure parameters refer to parameters used to describe the characteristics of the electric drive system under normal operating conditions. These parameters may include, but are not limited to, bus capacitance, inverter switching frequency, motor winding resistance and inductance, and power module characteristic parameters. Specific first circuit structure parameters need to be determined based on actual requirements. These parameters can be used to understand and improve the system's performance under normal conditions.

[0037] The aforementioned second circuit structure parameters refer to the parameters used to evaluate and design protection mechanisms when the electric drive system encounters abnormal operating conditions. These parameters may include, but are not limited to, overvoltage thresholds, discharge resistance values, thermal protection parameters, and the response time of the protection circuit. Specific second circuit structure parameters need to be determined based on actual requirements. These parameters can be used to design fault response and protection strategies, ensuring that the system can safely enter protection mode under abnormal operating conditions, preventing damage and ensuring personnel safety.

[0038] In one optional embodiment, firstly, under normal system operation, a series of key data are collected using measuring instruments and techniques, including the voltage variation of the bus capacitor, the switching frequency of the inverter, the resistance and inductance of the motor windings, and the efficiency and temperature characteristics of the power module. These first circuit structure parameters directly reflect the foundation of the system's healthy and efficient operation. Next, on a test platform simulating abnormal operating environments, intentionally introduced faults, such as overvoltage, short circuits, or overheating, are used to record the dynamic response of the electric drive system. The second circuit structure parameters obtained at this time include the effective impedance of the discharge resistor, the response time and threshold setting of the protection circuit, and the thermal stability of the power module under extreme conditions. This data is crucial for evaluating the system's fault protection capabilities and designing corresponding protective measures. The acquisition of these two parameters provides solid data support for subsequent system improvements, protection strategy formulation, and fault prevention.

[0039] For example, in a specific electric drive system test experiment, firstly, using precision instruments such as oscilloscopes, current probes, and thermal imagers, the capacitance of the DC bus capacitor under stable voltage, the switching frequency of the inverter at rated power output, the resistance and inductance of the motor windings under typical load, and the thermal resistance and efficiency of the power module at different operating temperatures are recorded under normal operating conditions. Obtaining these initial circuit structure parameters involves actual system operation testing, while simultaneously using circuit analysis software for simulation to ensure the accuracy and comprehensiveness of the data.

[0040] Next, to evaluate the abnormal operating states of the system, a series of fault simulation experiments were designed, including simulations of overvoltage and short-circuit conditions. Then, the secondary circuit structure parameters under abnormal operating conditions were obtained, such as the discharge resistor value when the voltage Vdc across the bus capacitor reaches the overvoltage threshold Vdc1, the instantaneous peak current of the power module under active short-circuit conditions, and the thermal stability of the module under high-current impact. By precisely controlling the voltage and current in a laboratory environment and using thermal cycling tests to simulate temperature changes during actual operation, detailed data on the secondary circuit structure parameters could be collected.

[0041] Step S104: Based on the first circuit structure parameters and the second circuit structure parameters, construct a simulation model of the electric drive system. The simulation model is used to simulate the normal operation state and abnormal operation state of the electric drive system.

[0042] The aforementioned simulation model refers to a model that uses software simulation to reproduce and predict the behavior and performance of an electric drive system under specific conditions (such as normal operation and abnormal operation). The simulation model can be constructed based on the system's first and second circuit structure parameters, using precise mathematical models and algorithms to simulate the interaction between circuit and motor components, as well as the system's dynamic response under different operating conditions. The simulation model can be used to predict the efficiency, response speed, and stability of the electric drive system under normal operating conditions before actually building the system. It can also be used to simulate the behavior of the electric drive system under abnormal operating conditions, such as overvoltage, short circuit, or overheating, to evaluate the system's safety and the effectiveness of fault protection strategies.

[0043] In one alternative embodiment, constructing a simulation model of the electric drive system involves integrating first and second circuit structure parameters. The former covers the electrical characteristics of the electric drive system under standard conditions, such as the charge storage capacity of the bus capacitor, the signal conversion efficiency of the inverter, the resistance and inductance properties of the motor windings, and the thermal resistance and switching losses of the power module. The latter focuses on the system's performance under non-standard conditions such as overload, short circuit, or temperature surge, including the impedance effect of the discharge resistor, the instantaneous current tolerance of the power components, and the effectiveness of the system's thermal management system under extreme conditions. By precisely defining these parameters, the simulation model can simulate the stable state of the electric drive system during daily operation and its dynamic changes under abnormal events, providing quantitative basis for circuit design improvement, safety assessment, and real-time fault prediction. Leveraging the powerful computing capabilities of simulation software, the model can not only reflect the independent behavior of individual components but also capture the interactions at the system level, ensuring that the electric drive system possesses comprehensive adaptability to both normal and abnormal operating conditions from the initial design stage.

[0044] In one optional embodiment, after obtaining the first and second circuit structure parameters, a simulation model of the electric drive system is constructed using specialized simulation software such as MATLAB, Simulink (a system-level modeling and simulation toolchain), Signal and Power Integrity Software (SABER), and PSpice (circuit simulation software). The characteristics of each component are precisely defined based on the collected parameters. The model includes the DC bus capacitor, inverter bridge, motor model, and related control circuits. Specifically, to simulate active short-circuit conditions, the model must include a controllable short-circuit circuit and a discharge resistor to reflect the voltage drop and current changes during an active short circuit. This parameter-based simulation model construction method not only helps predict and improve system performance during the design phase but also plays a crucial role in the formulation of fault protection strategies, ensuring that the electric drive system possesses excellent fault response capabilities and continuous reliability.

[0045] Step S106: During the simulation model operation, the model structure of the simulation model is adjusted to obtain the first simulation parameters and the second simulation parameters of the simulation model. The first simulation parameters represent the simulation parameters output before the simulation model is adjusted, and the second simulation parameters represent the simulation parameters output after the simulation model is adjusted.

[0046] The aforementioned model structure refers to the composition and connection methods of the components in the simulation model, as well as the interaction mechanisms between these components. When constructing a simulation model of an electric drive system, the model structure involves the electrical and physical connections between the inverter, motor, control circuit, sensors, and possible protection circuits (such as active short-circuit circuits). Adjustments to the model structure aim to improve system performance, such as by changing the inverter's switching frequency, adjusting the bus capacitor capacity, or improving the layout or thermal management design of the power modules, to achieve better efficiency, response speed, or heat dissipation performance.

[0047] The aforementioned first simulation parameter refers to the output parameters of the simulation model before any adjustments are made to the model structure. The first simulation parameter may include, but is not limited to, electrical performance parameters, thermal performance parameters, and control performance parameters. The specific first simulation parameter needs to be determined based on the model structure of the simulation model. The first simulation parameter can be used to reflect the expected performance indicators of the electric drive system during the design phase, such as motor efficiency, inverter losses, module junction temperature, and output voltage and current under specific input conditions.

[0048] The aforementioned second simulation parameter refers to the new result parameters output by the simulation model after the model structure has been adjusted. The second simulation parameter may include, but is not limited to, electrical performance parameters, thermal performance parameters, and control performance parameters. The specific second simulation parameter needs to be determined based on the model structure. Adjustments may be based on problems or improvement points discovered in the first round of simulation. This involves modifying specific parameters or components in the model to verify the effectiveness of the adjustment scheme and evaluate the degree of improvement in the electric drive system's performance.

[0049] In one optional embodiment, during the operation of the electric drive system simulation model, precise adjustments to the model structure allow for a detailed investigation of the specific impact of different design schemes on system performance. This adjustment mechanism involves fine-tuning component characteristics, adjusting circuit topology, and improving control strategies. After adjustment, the model generates a new set of output parameters, known as the second simulation parameters, to reflect the modified performance. Correspondingly, the model output before adjustment, referred to as the first simulation parameters, provides a benchmark, enabling designers to clearly compare and quantify the performance changes brought about by the adjustments. This process, through flexible adjustment of the model structure and comparison of simulation parameters during simulation model operation, allows for the prediction of the impact of different circuit structures on system efficiency, safety, and durability, particularly the risk of power module over-temperature under active short-circuit conditions.

[0050] For example, during the iterative process of the simulation model's operation, the impact of different design parameters on the performance of the electric drive system is explored by adjusting the model structure. This adjustment involves multiple levels, ranging from modifying the properties of circuit components, such as the thermal resistance and switching frequency of the inverter power module, to adjusting the control logic, such as adjusting the trigger threshold and response time of the active short-circuit protection strategy, and even to redesigning the system architecture, such as changing the module layout or introducing new thermal management components. Through the software interface, the operator can precisely change the parameters of specific components or redraw the circuit connection method, and these modifications are then recognized by the simulation software and applied to the model.

[0051] After adjustment, the simulation model will rerun based on the new structural parameters, outputting a set of updated performance indicators, namely the second set of simulation parameters, covering voltage, current, power loss, and junction temperatures of key components such as power modules. Comparing these parameters with the output of the first set of simulation parameters (the original model) allows for a direct evaluation of the structural adjustments' impact on system performance. If the adjusted parameters fail to meet expectations—for example, if the module junction temperature remains too high—the system needs further modification, repeating this simulation and analysis process until a better or satisfactory circuit design and control strategy is found. This iterative adjustment and simulation process is a crucial step in modern electric drive system design for improving circuit performance and enhancing system safety.

[0052] Step S108: Based on the first simulation parameters and the second simulation parameters, the circuit structure of the electric drive system is tested to obtain the test results. The test results are used to indicate whether there is a target risk when the electric drive system is in an abnormal operating state.

[0053] The aforementioned circuit structure refers to the circuit design structure that constitutes an electric drive system, encompassing the layout, connection methods, and interaction framework of all electronic components and modules. In the testing methods for electric drive systems, the circuit structure not only includes basic DC bus capacitors, discharge resistors, power modules, and motor connections, but also involves more refined aspects such as the selection of internal switching elements within modules, the logic circuits of control signals, and the sensor network used for monitoring and feedback within the system. The specific circuit structure needs to be determined based on the actual circuit design. Adjustments to the circuit structure, such as changing the power module model, altering the discharge resistor value, or improving the control logic, are all aimed at improving the system's performance under abnormal operating conditions, especially in managing and mitigating target risks.

[0054] The aforementioned test results refer to a series of performance indicators and status feedback obtained through simulation or experimentation after circuit structure adjustments. Test results may include, but are not limited to, the presence or absence of target risks when the electric drive system is in an abnormal operating state. Specific test results need to be determined based on the actual test conditions. Test results can be used to evaluate whether the circuit structure adjustments have effectively reduced the target risks, such as whether the overheating problem of the power module during active short circuits has been successfully avoided. Furthermore, test results can also be used to confirm whether design changes have brought additional performance gains or introduced new instability factors.

[0055] In one alternative embodiment, the circuit structure can be precisely and specifically tested based on a first simulation parameter and a second simulation parameter. The first simulation parameter represents the original performance indicators of the unadjusted circuit, while the second simulation parameter reflects the performance of the circuit structure after modification. The test focuses on the behavior of the electric drive system under abnormal operating conditions, particularly assessing the existence of target risks such as power module overheating. This process is typically performed in a simulation environment, utilizing advanced simulation software to simulate various fault scenarios, such as active short-circuit operating modes, to observe the behavioral differences before and after circuit structure adjustments.

[0056] This application provides a testing method for an electric drive system. The method first obtains first and second circuit structure parameters of the electric drive system. Then, based on these parameters, a simulation model of the electric drive system is constructed. During the simulation model's operation, the model structure is adjusted to obtain first and second simulation parameters. Finally, based on these parameters, the circuit structure of the electric drive system is tested to obtain test results. These test results indicate whether the electric drive system poses a target risk under abnormal operating conditions. This application first collects the first circuit structure parameters of the electric drive system under normal conditions and the second circuit structure parameters under abnormal conditions. Then, using these parameters, a simulation model of the electric drive system is constructed in a simulation environment. During the simulation model's operation and adjustment, the simulation parameters under different model structures—namely, the first and second simulation parameters—are output and compared to dynamically adjust the model structure and improve parameter configuration. Finally, based on the first and second simulation parameters, the circuit structure of the electric drive system is tested to obtain test results, assessing the safety of the electric drive system under abnormal operating conditions and ensuring the absence of a target risk. This application adopts a simulation-driven design adjustment method. By constructing and adjusting the simulation model of the electric drive system, it achieves the purpose of identifying and avoiding risks under abnormal operating conditions in advance, thereby achieving the technical effect of significantly improving the safety and reliability of the electric drive system, and thus solving the technical problem of low safety of electric drive systems in related technologies.

[0057] Optionally, during the simulation model's operation, the model structure of the simulation model is adjusted to obtain the first simulation parameters and the second simulation parameters of the simulation model. This includes: during the simulation model's operation, acquiring the first simulation parameters of the simulation model; adjusting the model structure of the simulation model based on preset short-circuit parameters to obtain a model structure adjustment result, wherein the model structure adjustment result is used to indicate whether the simulation model successfully simulates the short-circuit scenario of the electric drive system; and in response to the model structure adjustment result indicating that the simulation model successfully simulates the short-circuit scenario of the electric drive system, acquiring the second simulation parameters of the simulation model.

[0058] The aforementioned preset short-circuit parameters refer to a series of specific values ​​or conditions set in the simulation model to simulate short-circuit conditions in an electric drive system. These preset short-circuit parameters may include, but are not limited to, short-circuit trigger thresholds (such as the upper limit of the voltage Vdc across the capacitor, Vdc1), short-circuit duration, initial conditions before the short circuit (such as the operating state of the electric drive system), and short-circuit response mechanisms (how to control the conduction state of the inverter bridge arms). Specific preset short-circuit parameters need to be determined based on actual requirements. Preset short-circuit parameters can provide a clear simulation framework, ensuring that the simulation environment can reproduce short-circuit events that may occur in real life, thereby evaluating the performance and safety of the electric drive system under abnormal conditions.

[0059] The aforementioned model structure adjustment results refer to feedback information regarding whether the system can accurately and stably simulate the predetermined short-circuit scenario after modifications to the electric drive system simulation model. It confirms whether the adjusted model can effectively reflect the impact of design changes on system performance, especially the response under short-circuit conditions. The model structure adjustment results can be used to verify the feasibility of the adjustment scheme, ensuring the accuracy and reliability of the simulation results. The acquisition of the second simulation parameter is only meaningful when the model structure adjustment results indicate successful simulation.

[0060] The aforementioned short-circuit scenario refers to a condition where, under specific conditions, a portion of the circuit in an electric drive system experiences an abnormally low resistance state, leading to an abnormal increase in current and potentially damaging the system. Short-circuit scenarios can include, but are not limited to, overload short circuits, internal short circuits, and external short circuits; the specific scenario needs to be determined based on actual requirements. Simulating short-circuit scenarios is a core step in evaluating the effectiveness of active short-circuit protection strategies for electric drive systems. By analyzing the behavior of the electric drive system under short-circuit conditions, designers can assess its safety and stability, identify potential design flaws, and take measures to improve it.

[0061] In one optional embodiment, firstly, during the simulation model's operation, first simulation parameters are collected. These parameters reflect the model's original performance state before structural optimization, laying the foundation for subsequent performance comparison and evaluation. Subsequently, based on preset short-circuit parameters, the circuit structure of the simulation model is adjusted to obtain the model structure adjustment result, aiming to simulate the response characteristics of the electric drive system when encountering a short-circuit condition. The model structure adjustment result not only verifies the feasibility of the adjustment measures but also confirms whether the simulation model can accurately reproduce the short-circuit scenario. Once the model structure adjustment result indicates successful simulation—that is, the model can stably and realistically simulate the short-circuit state of the electric drive system—then the next stage begins, collecting second simulation parameters. This set of parameters contains performance data under short-circuit scenarios after circuit adjustment. By comparing and analyzing with the first simulation parameters, the positive role of circuit structure optimization in improving the system's safety and stability under abnormal operating conditions can be intuitively evaluated. The entire process is an iterative optimization cycle, ensuring that the electric drive system design can effectively cope with potential risks such as short circuits, improving the overall design reliability and efficiency.

[0062] Optionally, based on the first simulation parameters and the second simulation parameters, the circuit structure of the electric drive system is tested to obtain test results, including: comparing the first simulation parameters and the second simulation parameters to obtain a comparison result, wherein the comparison result is used to indicate whether the target structure in the electric drive system meets the preset conditions; in response to the comparison result indicating that the target structure in the electric drive system meets the preset conditions, the test result is determined to indicate that the electric drive system has a target risk when it is in an abnormal operating state; in response to the comparison result indicating that the target structure in the electric drive system does not meet the preset conditions, the test result is determined to indicate that the electric drive system does not have a target risk when it is in an abnormal operating state.

[0063] The aforementioned comparison results refer to conclusions drawn from a detailed comparative analysis of the first and second simulation parameters. These results may include, but are not limited to, comparisons of thermodynamic performance (junction temperature changes), electrical performance (current, voltage, and power changes), and control performance (response time and accuracy). Specific comparison results need to be determined based on actual comparison requirements. The comparison results can be used to reveal specific differences in simulated abnormal operating conditions before and after circuit adjustments, such as changes in power module junction temperature, adjustments to peak current, or improvements in voltage recovery rate.

[0064] The aforementioned target structure can refer to a critical circuit section or component in an electric drive system. The target structure can be a single element, such as an Insulated Gate Bipolar Transistor (IGBT) or a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), or a composite component, such as a power module containing multiple elements; or the layout and connection method of the entire inverter circuit. The specific target structure needs to be determined based on actual requirements. The performance of the target structure can serve as a core indicator for evaluating the overall reliability of the electric drive system. By adjusting the target structure, designers aim to improve the system's resilience to abnormal conditions such as short circuits.

[0065] The aforementioned preset conditions refer to a series of technical specifications and performance indicators set to ensure the safe operation of the electric drive system under specific abnormal operating conditions (such as active short circuits). Preset conditions may include, but are not limited to, thermal management specifications, electrical safety standards, and response time requirements of control strategies; specific preset conditions need to be determined based on actual needs. Preset conditions can serve as standards for measuring the performance of the electric drive system, helping designers establish the direction and endpoint of circuit adjustments. Only when the performance of the target structure meets these conditions can the risks of the electric drive system under abnormal operating conditions be considered effectively managed.

[0066] The aforementioned target risks refer to specific hazards that an electric drive system may face under abnormal operating conditions, especially in emergencies such as active short circuits. Target risks may include, but are not limited to, thermal risks (such as chip overheating), electrical risks (such as transient current surges), and functional risks (such as control system failures). Specific target risks need to be determined based on the actual test scenarios. Identifying and assessing target risks is one of the core tasks in the design and improvement of electric drive systems. It directly relates to the system's safety and long-term reliability, and is also a criterion for determining the success of the design.

[0067] In one optional embodiment, the first simulation parameters and the second simulation parameters are compared and analyzed to obtain a comparison result, which evaluates whether the adjustment effect of the target structure meets the pre-defined conditions. If the comparison result shows that the improvement of the target structure has met the pre-defined conditions, it means that the system has a target risk under the simulated abnormal operating state, that is, some key performance indicators exceed the safety threshold under specific short-circuit conditions, indicating that the current design of the target structure still needs further adjustment to enhance the system's safety protection capability under abnormal conditions. Conversely, if the comparison analysis shows that the target structure does not meet the pre-defined conditions, but this result is obtained under the background that the target risk does not exist, that is, under the simulated short-circuit scenario, the improved system shows good risk resistance performance and does not exceed any safety limits, then it can be determined that the test results show that the electric drive system can effectively avoid the target risk when facing abnormal operating states, ensuring the stability and safety of the system. This comparative analysis process is not only a key verification link in the design iteration, but also provides precise guidance for subsequent circuit improvements.

[0068] Optionally, the first simulation parameter and the second simulation parameter are compared to obtain a comparison result, including: determining the first temperature of the target structure in the first simulation parameter and the second temperature of the target structure in the second simulation parameter; determining the temperature difference between the first temperature and the second temperature; in response to the temperature difference being within a preset temperature difference range, determining the comparison result that the target structure in the electric drive system meets the preset conditions; in response to the temperature difference not being within the preset temperature difference range, determining the comparison result that the target structure in the electric drive system does not meet the preset conditions.

[0069] The aforementioned first temperature may refer to the higher junction temperature measured in the first simulation when the target structure is operating under abnormal conditions.

[0070] The aforementioned second temperature may refer to the corresponding junction temperature value of the target structure under the same abnormal operating state in the second simulation.

[0071] The aforementioned temperature difference refers to the result of subtracting the first temperature from the second temperature, quantifying the change in the junction temperature of the target structure before and after circuit adjustment. The temperature difference can serve as an important indicator for evaluating the effectiveness of circuit adjustment measures, directly reflecting the degree to which the adjustment improves the system's thermal management capabilities.

[0072] The aforementioned preset temperature difference range refers to a temperature variation range set by the designer before circuit improvement. It specifies the expected threshold for the change in junction temperature of the target structure after improvement relative to the initial junction temperature. The preset temperature difference range can be fixed, such as a fixed reduction range of 5°C to 10°C or 4°C to 8°C; or it can be dynamic, with the specific preset temperature difference range determined based on the specific operating conditions and design requirements of the electric drive system. The preset temperature difference range can serve as a standard for evaluating whether adjustments have met the requirements, helping designers quickly determine whether circuit adjustment measures are effective and whether further adjustments are needed.

[0073] In one optional embodiment, a first temperature of the target structure in the first simulation parameters and a second temperature of the target structure in the second simulation parameters are first obtained. Next, the difference between the first and second temperatures, i.e., the temperature difference, is calculated. This value directly reflects the degree of change in the thermal performance of the target structure before and after circuit adjustment. If the temperature difference falls within a pre-defined temperature difference range, which represents the designer's expected threshold for the circuit adjustment effect, the comparison result is determined to indicate that the target structure meets the preset conditions. This means that under the adjusted circuit design, the thermal performance of the target structure under abnormal operating conditions has been improved as expected, meeting the design's safety and performance standards. However, if the temperature difference exceeds the preset temperature difference range, the comparison result is determined to indicate that the target structure does not meet the preset conditions. This result shows that although the circuit design has been adjusted, the change in thermal performance of the target structure under abnormal operating conditions has not achieved the designer's expected improvement effect, suggesting a need to re-examine the circuit adjustment strategy or further enhance the thermal management capabilities of the target structure to ensure that the electric drive system can maintain a stable and safe operating state under all possible operating conditions. This series of steps constitutes the core process of improving and evaluating the circuit design of electric drive systems, ensuring that every step, from theory to practice, is closely aligned with the goal of improving system performance and safety.

[0074] Optionally, obtaining the first circuit structure parameters and the second circuit structure parameters of the electric drive system includes: obtaining the first circuit structure parameters; and short-circuiting the electric drive system based on the first circuit structure parameters to obtain the second circuit structure parameters.

[0075] In one optional embodiment, firstly, first circuit structure parameters are extracted from the existing circuit design. These parameters include basic information such as component values, layout, and connection methods. Subsequently, the behavior of the electric drive system under short-circuit conditions is simulated in a simulation environment using these first circuit structure parameters. By analyzing the simulation results, second circuit structure parameters reflecting the system's performance under abnormal conditions are obtained. This process provides fundamental data for subsequent circuit adjustments, ensuring the accuracy and effectiveness of design iterations.

[0076] Optionally, the method further includes: responding to the test result indicating that the electric drive system has a target risk under abnormal operating conditions, adjusting the first circuit structure parameters based on a preset adjustment strategy to obtain a third circuit structure parameter, and determining a fourth circuit structure parameter, wherein the fourth circuit result parameter is used to represent the circuit structure parameter after adjusting the third circuit structure parameter so that the electric drive system is under abnormal operating conditions; using the third circuit structure parameter as the first circuit structure parameter, using the fourth circuit structure parameter as the second circuit structure parameter, and constructing a simulation model of the electric drive system based on the first circuit structure parameter and the second circuit structure parameter; adjusting the model structure of the simulation model during the simulation model operation to obtain the first simulation parameter and the second simulation parameter of the simulation model; testing the circuit result of the electric drive system based on the first simulation parameter and the second simulation parameter to obtain test results until the test results indicate that the electric drive system does not have a target risk under abnormal operating conditions.

[0077] The aforementioned pre-defined adjustment strategy refers to a set of rules or methods pre-defined during the adjustment process of electric drive system circuit design. This guides the direction of modifications to circuit structure parameters, ensuring that the system's performance meets specific safety or performance standards under abnormal operating conditions. Pre-defined adjustment strategies may include changing component parameters (such as switching resistors and inductor values), adjusting circuit layout, and introducing or modifying control logic algorithms. The specific pre-defined adjustment strategy needs to be determined based on the actual adjustment objective. Pre-defined adjustment strategies ensure the systematic and directional nature of circuit adjustments, avoiding the uncertainties that may arise from blind adjustments, and improving design efficiency and the reliability of results.

[0078] The aforementioned third circuit structure parameters can refer to a new set of parameters obtained after adjusting the circuit according to a preset adjustment strategy following a short-circuit test based on the first circuit structure parameters. The specific types of the third circuit structure parameters need to be determined based on the adjustment range covered by the preset adjustment strategy. For example, it could be reducing heat dissipation by changing the switching frequency of power components, or improving heat dissipation efficiency by adjusting the structure of the circuit cooling system. The third circuit structure parameters can be used to guide further design and verification of the electric drive system circuit, ensuring that the system can avoid target risks such as power module overheating under abnormal operating conditions.

[0079] The aforementioned fourth circuit structure parameter refers to the circuit structure parameter obtained after actual adjustment during the process of adjusting the third circuit structure parameter. This fourth circuit structure parameter can serve as the basis for constructing a simulation model of the adjusted electric drive system. By comparing the first and second simulation parameters, the performance changes of the electric drive system under abnormal operating conditions can be analyzed to determine whether the target risk has been eliminated.

[0080] In one optional embodiment, if test results indicate that the electric drive system faces a target risk under abnormal operating conditions, a preset adjustment strategy is initiated to adjust the original first circuit structure parameters, thereby generating third circuit structure parameters. Then, through in-depth analysis, fourth circuit structure parameters are identified, representing a further adjustment to the third circuit parameters to ensure that the circuit structure parameters of the electric drive system are improved when encountering anomalies. Subsequently, the third circuit structure parameters are designated as the first circuit structure parameters; simultaneously, the fourth circuit structure parameters are designated as the second circuit structure parameters. Based on this updated set of parameters, a simulation model of the electric drive system is constructed. The model construction is accompanied by fine-tuning of its structure to obtain more accurate first and second simulation parameters. After this series of operations is completed, a new round of circuit result testing is conducted on the electric drive system. The testing process continues until the results show that the electric drive system no longer faces the target risk under abnormal operating conditions, achieving the design improvement goal. This process, through design verification and iterative improvement, ensures the safety and stability of the electric drive system under various operating conditions.

[0081] Optionally, the method further includes: in response to the test result indicating that there is no target risk in the case that the electric drive system is in an abnormal operating state, constructing the target circuit structure of the electric drive system based on the first circuit structure parameters.

[0082] In one optional embodiment, when the test results indicate that the electric drive system does not pose the target risk under abnormal operating conditions, it means that the current first circuit structure parameters have met the design requirements. Therefore, based on the first circuit structure parameters, the target circuit structure of the electric drive system is directly constructed to ensure that the system can maintain its predetermined performance level under different operating conditions and effectively avoid potential risks. This step is the end point of the entire design verification process, marking that the circuit design has successfully achieved its predetermined safety and functional goals, and can proceed to the next stage of production and testing.

[0083] In one optional embodiment, an active short-circuit simulation design process includes three key steps: Step 1, building an active short-circuit simulation model of the electric drive controller; Step 2, conducting active short-circuit simulation and obtaining the simulation results; Step 3, confirming whether the active short-circuit design meets the requirements based on the simulation results and evaluating the circuit function adjustment scheme design. These three steps together form a complete process from model building to design evaluation.

[0084] In one alternative embodiment, Figure 2 This is a schematic diagram of an electric drive system according to an embodiment of this application, such as... Figure 2As shown, the system includes a DC bus capacitor C, a discharge resistor R, a three-phase six-bridge circuit composed of power modules, a drive control circuit for controlling and driving the power modules, an electric drive controller whose input is connected to the power supply Vdc, and whose output is connected to the three-phase motor. Furthermore, the figure also indicates the motor's three-phase currents ia (A-phase current), ib (B-phase current), and ic (C-phase current), as well as the motor's equivalent inductance Ls, equivalent resistance Rs, back electromotive force (EMF), and switch SW. These together constitute the basic electrical characteristics of the electric drive system.

[0085] Figure 3 This is a circuit diagram of an active short-circuit operating state according to an embodiment of this application, such as... Figure 3 As shown, the circuit includes a power supply Vdc, a DC bus capacitor C, a discharge resistor R, a three-phase six-bridge circuit composed of power modules, a switch SW, three-phase motor currents ia (phase A current), ib (phase B current), and ic (phase C current), as well as the motor's equivalent inductance Ls, equivalent motor resistance Rs, and motor back electromotive force (EMF). Gray text or curves in the figure represent the non-conducting state. Figure 3 The circuit configuration of the electric drive controller in active short-circuit operating mode is depicted. The conduction status of the three-phase lower or upper bridge arm under short-circuit conditions is shown, forming a closed-loop circuit directly connected to the motor. Particular emphasis is placed on the change in voltage Vdc across the bus capacitor during active short-circuit triggering, and the discharge process through the discharge resistor R.

[0086] Based on the above principles of electric drive systems and active short-circuit operation, an active short-circuit simulation model is built in the Saber simulation software. The model's functions include: simulating normal operation of the electric drive system; and disconnecting the DC high-voltage power supply from the electric drive system upon encountering a fault, i.e., disconnecting... Figure 2 In the circuit, the switch SW charges the bus capacitor using the motor's back electromotive force until the voltage Vdc across the bus capacitor reaches the upper voltage threshold Vdc1, triggering an active short circuit. This simulates the circuit states of the electric drive system under different operating conditions, including normal operation and active short circuit. The power module utilizes the built-in modeling tools in Saber software, inputting test data such as transmission characteristic curves, thermal resistance curves, switching losses, and switching times from the manufacturer's datasheet to build a simulation model capable of simulating module losses and junction temperature.

[0087] Next, a simulation of an electric drive fault condition is presented. Initially, the electric drive operates normally. Upon encountering a fault, the connection between the power supply and the electric drive controller is disconnected, i.e., switch SW is disconnected, and the three-phase power module control signal is also disconnected. The three-phase current in the circuit flows through the anti-parallel diodes of the power module, and the motor's back electromotive force charges the DC bus capacitor, causing the voltage Vdc across the capacitor to rise until it reaches the upper threshold Vdc1, entering an active short-circuit operating state. At this time, the lower (or upper) bridge arm of the three-phase module conducts, forming a closed-loop circuit with the motor. A large three-phase current continuously flows through the lower bridge arm, causing the module junction temperature to rise. Meanwhile, the voltage Vdc across the DC bus capacitor discharges through the discharge resistor connected in parallel, and the voltage Vdc gradually decreases. The simulation waveforms of the transition from normal operation to the active short-circuit operating state are shown below. Figure 4 As shown, Figure 4 This is a waveform result diagram according to an embodiment of this application. Figure 4 The simulation results show the bus voltage (V), three-phase current (A), and module junction temperature (°C) during the transition from normal operating state to active short circuit. dclink represents the DC bus voltage, tempj represents the junction temperature, ia represents the A-phase current, ib represents the B-phase current, and ic represents the C-phase current. The dashed box indicates the process of switching from normal operating state to active short circuit.

[0088] Figure 5 This is a partially enlarged simulation result according to an embodiment of this application. Figure 5 Yes Figure 4 The magnified view of the transition phase within the dashed box provides a more detailed view of the rapid fluctuations in bus voltage Vdc, three-phase currents ia, ib, ic, and module junction temperature at the moment of short circuit, followed by their stable state.

[0089] Simulation results show that before time t1, the electric drive system transitions from normal operation to power cut-off to diode freewheeling charging the bus capacitor, increasing the bus voltage. After time t1, it enters active short-circuit operation, and the bus voltage gradually decreases. At the instant of entering the active short-circuit state at time t1, the three-phase current increases rapidly, causing a significant instantaneous fluctuation in junction temperature. After entering the active short-circuit state, the three-phase current gradually stabilizes, but the current value remains higher than the three-phase current under normal operation. During the active short-circuit operation, the module junction temperature continues to increase. The module junction temperature curve in the simulation results serves as the basis for evaluating the rationality of the active short-circuit design and for functional improvements.

[0090] When the module design changes, active short-circuit simulation can be used during the design phase to assess whether the module has an over-temperature risk and whether the active short-circuit scheme is feasible. If the power module junction temperature exceeds the temperature limit, consider adjusting circuit parameters, such as reducing the switching resistor to reduce module losses, or adjusting the active short-circuit scheme by using a bridge switching method to prevent the power module from flowing with large currents for extended periods, which could lead to over-temperature or even damage, thus preventing module failure. If the module junction temperature simulation result exceeds the temperature limit, adjust the circuit parameters or implement a bridge switching scheme during active short-circuit. After adjustment, perform simulation analysis again until the module junction temperature simulation result meets the device's operating temperature range, thus preventing serious damage.

[0091] Figure 6 This is a simulation result diagram of the junction temperature of a module during an active short circuit process according to an embodiment of this application. Figure 6 This diagram illustrates the change in module junction temperature during an active short circuit when a power module in the electric drive system is replaced. Specifically, it shows the change in module junction temperature during an active short circuit when module 1 in the electric drive system is replaced with module 2. This illustration helps assess the impact of different modules on the effectiveness of the active short circuit strategy, thereby supporting design decisions.

[0092] Figure 7 This is a simulation result of the junction temperature of a module during an active short circuit, according to another embodiment of this application. Figure 7 This demonstration illustrates the difference in junction temperature of the power module under active short-circuit conditions before and after adjusting the switching resistor R. Specifically, it shows the difference in junction temperature under active short-circuit conditions after adjusting the switching resistor from 3Ω to 8Ω. This comparison provides insight into the effect of the switching resistor on the system's thermal performance, offering a basis for improving circuit functionality.

[0093] Figure 6 and Figure 7 The paper demonstrates the impact of replacing modules and changing the switching resistors of the drive circuit on the junction temperature of the power module during the active short circuit process. By modifying the circuit parameters and cooperating with active short circuit simulation, the active short circuit simulation design was completed until the junction temperature met the requirements.

[0094] According to an embodiment of this application, an embodiment of a testing device for an electric drive system is provided. It should be noted that the device can be used to execute the above-described testing method for the electric drive system. The specific implementation method and preferred application scenarios are the same as those in the above embodiment, and will not be repeated here.

[0095] Figure 8 This is a schematic diagram of a test apparatus for an electric drive system according to an embodiment of this application. Figure 8 As shown, the device includes: an acquisition module 802, a construction module 804, a running module 806, and a testing module 808.

[0096] The acquisition module 802 is used to acquire first circuit structure parameters and second circuit structure parameters of the electric drive system, wherein the first circuit structure parameters represent the circuit structure parameters of the electric drive system under normal operating conditions, and the second circuit structure parameters represent the circuit structure parameters of the electric drive system under abnormal operating conditions; the construction module 804 is used to construct a simulation model of the electric drive system based on the first and second circuit structure parameters, wherein the simulation model is used to simulate the normal operating conditions and abnormal operating conditions of the electric drive system; the running module 806 is used to adjust the model structure of the simulation model during the simulation model's operation to obtain first and second simulation parameters of the simulation model, wherein the first simulation parameters represent the simulation parameters output before the adjustment, and the second simulation parameters represent the simulation parameters output after the adjustment; the testing module 808 is used to test the circuit structure of the electric drive system based on the first and second simulation parameters to obtain test results, wherein the test results indicate whether there is a target risk in the electric drive system under abnormal operating conditions.

[0097] Optionally, the running module is used to collect the first simulation parameters of the simulation model during the simulation model's operation; adjust the model structure of the simulation model based on preset short-circuit parameters to obtain the model structure adjustment result, wherein the model structure adjustment result is used to indicate whether the simulation model has successfully simulated the short-circuit scenario of the electric drive system; and in response to the model structure adjustment result indicating that the simulation model has successfully simulated the short-circuit scenario of the electric drive system, collect the second simulation parameters of the simulation model.

[0098] Optionally, the test module is used to compare the first simulation parameter and the second simulation parameter to obtain a comparison result, wherein the comparison result is used to indicate whether the target structure in the electric drive system meets the preset conditions; in response to the comparison result that the target structure in the electric drive system meets the preset conditions, the test result is determined to be that there is a target risk in the electric drive system under abnormal operating conditions; in response to the comparison result that the target structure in the electric drive system does not meet the preset conditions, the test result is determined to be that there is no target risk in the electric drive system under abnormal operating conditions.

[0099] Optionally, the test module is further configured to determine the first temperature of the target structure in the first simulation parameters and the second temperature of the target structure in the second simulation parameters; determine the temperature difference between the first temperature and the second temperature; in response to the temperature difference being within a preset temperature difference range, determine that the comparison result is that the target structure in the electric drive system meets the preset conditions; in response to the temperature difference not being within the preset temperature difference range, determine that the comparison result is that the target structure in the electric drive system does not meet the preset conditions.

[0100] Optionally, the acquisition module is used to acquire the first circuit structure parameters; and to short-circuit the electric drive system based on the first circuit structure parameters to obtain the second circuit structure parameters.

[0101] Optionally, the device is further configured to, in response to a test result indicating a target risk exists in the electric drive system under abnormal operating conditions, adjust the first circuit structure parameters based on a preset adjustment strategy to obtain a third circuit structure parameter, and determine a fourth circuit structure parameter, wherein the fourth circuit result parameter represents the circuit structure parameter after adjusting the third circuit structure parameter to achieve the circuit structure parameter in the abnormal operating state of the electric drive system; use the third circuit structure parameter as the first circuit structure parameter and the fourth circuit structure parameter as the second circuit structure parameter, and execute a simulation model of the electric drive system based on the first circuit structure parameter and the second circuit structure; during the simulation model operation, adjust the model structure of the simulation model to obtain the first simulation parameter and the second simulation parameter of the simulation model; test the circuit result of the electric drive system based on the first simulation parameter and the second simulation parameter to obtain test results until the test results indicate that there is no target risk in the electric drive system under abnormal operating conditions.

[0102] Optionally, the device is further configured to, in response to a test result indicating that no target risk exists in the electric drive system under abnormal operating conditions, construct a target circuit structure for the electric drive system based on the first circuit structure parameters. In the above embodiments of this application, the descriptions of each embodiment have different focuses; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0103] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention during runtime.

[0104] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0105] According to another aspect of the embodiments of the present application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0106] According to another aspect of the embodiments of this application, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods in various embodiments of the present invention.

[0107] According to another aspect of the embodiments of this application, a computer program is also provided, which, when executed by a processor, implements the methods of various embodiments of the present invention.

[0108] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0109] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0110] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0111] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0112] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0113] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A test method for an electric drive system, characterized in that, include: Obtain a first circuit structure parameter and a second circuit structure parameter of the electric drive system, wherein the first circuit structure parameter is used to represent the circuit structure parameter of the electric drive system under normal operating conditions, and the second circuit structure parameter is used to represent the circuit structure parameter of the electric drive system under abnormal operating conditions. Based on the first circuit structure parameters and the second circuit structure parameters, a simulation model of the electric drive system is constructed, wherein the simulation model is used to simulate the normal operating state and the abnormal operating state of the electric drive system; During the operation of the simulation model, the model structure of the simulation model is adjusted to obtain the first simulation parameters and the second simulation parameters of the simulation model. The first simulation parameters represent the simulation parameters output before the simulation model is adjusted, and the second simulation parameters represent the simulation parameters output after the simulation model is adjusted. Based on the first simulation parameters and the second simulation parameters, the circuit structure of the electric drive system is tested to obtain test results, wherein the test results are used to indicate whether the electric drive system has a target risk when it is in the abnormal operating state.

2. The method according to claim 1, characterized in that, During the simulation model's operation, the model structure is adjusted to obtain the first and second simulation parameters, including: During the operation of the simulation model, the first simulation parameters of the simulation model are collected; The model structure of the simulation model is adjusted based on preset short-circuit parameters to obtain the model structure adjustment result, wherein the model structure adjustment result is used to indicate whether the simulation model successfully simulates the short-circuit scenario of the electric drive system; In response to the model structure adjustment result indicating that the simulation model successfully simulates the short-circuit scenario of the electric drive system, the second simulation parameters of the simulation model are collected.

3. The method according to claim 1, characterized in that, Based on the first simulation parameters and the second simulation parameters, the circuit structure of the electric drive system is tested, and the test results are obtained, including: The first simulation parameters and the second simulation parameters are compared to obtain a comparison result, wherein the comparison result is used to indicate whether the target structure in the electric drive system meets the preset conditions; In response to the comparison result indicating that the target structure in the electric drive system meets the preset condition, the test result is determined to indicate that the electric drive system has the target risk when it is in the abnormal operating state. In response to the comparison result indicating that the target structure in the electric drive system does not meet the preset condition, the test result is determined to be that the electric drive system does not have the target risk when it is in the abnormal operating state.

4. The method according to claim 3, characterized in that, The first simulation parameters and the second simulation parameters are compared to obtain the comparison results, including: Determine the first temperature of the target structure in the first simulation parameters, and the second temperature of the target structure in the second simulation parameters; Determine the temperature difference between the first temperature and the second temperature; In response to the temperature difference being within a preset temperature difference range, the comparison result is determined to be that the target structure in the electric drive system meets the preset condition; In response to the temperature difference not being within the preset temperature difference range, the comparison result is determined to be that the target structure in the electric drive system does not meet the preset condition.

5. The method according to claim 1, characterized in that, Obtain the first circuit structure parameters and the second circuit structure parameters of the electric drive system, including: Obtain the structural parameters of the first circuit; The electric drive system is short-circuited based on the first circuit structure parameters to obtain the second circuit structure parameters.

6. The method according to claim 1, characterized in that, The method further includes: In response to the test result indicating that the electric drive system has the target risk when it is in the abnormal operating state, the first circuit structure parameters are adjusted based on a preset adjustment strategy to obtain the third circuit structure parameters, and the fourth circuit structure parameters are determined. The fourth circuit result parameters are used to represent the circuit structure parameters of the electric drive system in the abnormal operating state after the third circuit structure parameters are adjusted. The third circuit structure parameter is used as the first circuit structure parameter, and the fourth circuit structure parameter is used as the second circuit structure parameter. A simulation model of the electric drive system is constructed based on the first and second circuit structure parameters. During the simulation model's operation, the model structure is adjusted to obtain the first and second simulation parameters. Based on the first and second simulation parameters, the circuit results of the electric drive system are tested to obtain test results until the test results indicate that the electric drive system does not exhibit the target risk under the abnormal operating state.

7. The method according to any one of claims 1 or 6, characterized in that, The method further includes: In response to the test result that the electric drive system does not have the target risk when it is in the abnormal operating state, the target circuit structure of the electric drive system is constructed based on the first circuit structure parameters.

8. A testing device for an electric drive system, characterized in that, include: The acquisition module is used to acquire a first circuit structure parameter and a second circuit structure parameter of the electric drive system, wherein the first circuit structure parameter is used to represent the circuit structure parameter of the electric drive system under normal operating conditions, and the second circuit structure parameter is used to represent the circuit structure parameter of the electric drive system under abnormal operating conditions. A construction module is used to construct a simulation model of the electric drive system based on the first circuit structure parameters and the second circuit structure parameters, wherein the simulation model is used to simulate the normal operation state and the abnormal operation state of the electric drive system; The running module is used to adjust the model structure of the simulation model during the running of the simulation model to obtain the first simulation parameters and the second simulation parameters of the simulation model. The first simulation parameters are used to represent the simulation parameters output before the simulation model is adjusted, and the second simulation parameters are used to represent the simulation parameters output after the simulation model is adjusted. The testing module is used to test the circuit structure of the electric drive system based on the first simulation parameters and the second simulation parameters, and obtain test results, wherein the test results are used to indicate whether the electric drive system has a target risk when it is in the abnormal operating state.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the execution of the method according to any one of claims 1 to 7 in the processor of the device.

10. An electronic device, characterized in that, include: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors perform the method of any one of claims 1 to 7.

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