Vehicle motor phase current overcurrent simulation method and device and electronic equipment

Abstract

The invention relates to a vehicle motor phase current overcurrent simulation method and device and electronic equipment, and the method comprises the steps: executing an overcurrent simulation operation according to the adjustment of a closing value of a brake disc; in the step of executing the operation of simulating overcurrent, relevant parameters are synchronously measured, so that control parameters of the vehicle are optimized according to measured values of the relevant parameters, and the relevant parameters at least comprise current and temperature; and when the simulated wheel enters a first flying state, a first landing state, a second flying state, a third flying state and a third landing state, the driving motor needs to reduce the torque. By adopting the simulation method, compared with a mode of acquiring data through on-road field test of the vehicle in the prior art, the acquisition mode of the related parameters is simplified, the cost of the acquisition of the related parameters is reduced, and the safety of the acquisition of the related parameters is improved.

Description

Background Art

[0002] When the vehicle goes over a speed bump or the wheels slip, the vehicle will become airborne and the motor speed will change instantaneously, which may easily exceed the bandwidth of the motor controller, thereby causing faults such as three-phase overcurrent or overtemperature. However, the prior art lacks a simulation method for detaching the vehicle from the driving state when causing such vehicle airborne overcurrent faults. As a result, in order to obtain more data on vehicle airborne, it is necessary to rely on vehicle road tests to obtain the corresponding data, which makes data collection less secure and more costly. Summary of the invention

[0003] In order to overcome the problem in the prior art that there is a lack of a simulation method for current overcurrent caused by vehicle vacancy while driving, which results in high cost and low safety for current overcurrent data collection, the present invention provides a method, device and electronic equipment for simulating vehicle motor phase current overcurrent.

[0004] In a first aspect, in order to solve the above technical problems, the present invention provides a method for simulating overcurrent of a motor phase of a vehicle, which is used to simulate the overcurrent situation occurring in a set scenario through a simulation device, the simulation device including a drive motor and a brake disc, and the simulation method including:

[0005] According to the adjustment of the closing value of the brake disc, an operation of simulating current overcurrent is performed;

[0006] In the step of performing the operation of simulating current overflow, relevant parameters are synchronously measured to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature;

[0007] The operation of simulating current overcurrent includes:

[0008] Executing an operation of changing the closing value from 0 to 100% to simulate the wheel entering a first airborne state;

[0009] Execute the operation of closing the value in the first interval to simulate the wheel entering the first landing state;

[0010] Execute the operation of closing the value to 0 to simulate the wheel entering the second landing state;

[0011] Executing the operation of closing the value in the first interval to simulate the wheel entering the second airborne state;

[0012] Execute the operation with the closing value of 100% to simulate the wheel entering the third airborne state;

[0013] Execute the operation of closing the value in the first interval to simulate the wheel entering the third landing state;

[0014] Release the control of the brake disc;

[0015] Among them, when the simulated wheel enters the first vacant state, the simulated wheel enters the first grounded state, the simulated wheel enters the second vacant state, the simulated wheel enters the third vacant state and the simulated wheel enters the third grounded state, the drive motor needs to reduce torque.

[0016] In one embodiment, before releasing the control of the brake disc, the method further comprises:

[0017] The steps of the simulated wheels entering a second grounded state, the simulated wheels entering a second airborne state, the simulated wheels entering a third airborne state, and the simulated wheels entering a third grounded state are executed in a loop.

[0018] In one embodiment, the performing of the operation of closing the value in the first interval includes:

[0019] The operation is performed with the brake disc closing value between 30% and 70%.

[0020] In one embodiment, the simulation method comprises:

[0021] The operation of simulating current overcurrent is executed cyclically, and each time the operation of simulating current overcurrent is executed, the drive motor corresponds to a different output speed.

[0022] In one embodiment, in the step of performing the operation of simulating current overcurrent, the relevant parameters are synchronously measured, wherein the relevant parameters further include:

[0023] The DC bus voltage, motor output torque, motor speed and hardware damage are measured.

[0024] In one embodiment,

[0025] In the step of executing the operation of simulating current overcurrent, the operation state of the simulation device is also judged, including:

[0026] If any one of the current, temperature and hardware damage exceeds the corresponding preset range, the simulation device will shut down.

[0027] In one embodiment, the simulation device includes a bench, and before the step of performing the operation of simulating current overflow according to the adjustment of the closing value of the brake disc, the simulation device is pre-set;

[0028] The presetting of the simulation device comprises:

[0029] Installing the stand;

[0030] establishing communication between the platform and the drive motor;

[0031] The simulation device is set up according to the corresponding test conditions.

[0032] In one embodiment, the simulation method further comprises:

[0033] The motor is controlled to execute energy recovery instructions according to the external negative torque, and an operation simulating current overcurrent is performed.

[0034] In a second aspect, the present invention further provides a phase current overcurrent simulation device, which is used to simulate the current overcurrent situation occurring in a set scenario, and the simulation device includes:

[0035] The brake disc control module performs an operation of simulating current overcurrent according to the adjustment of the closing value of the brake disc;

[0036] The operation of simulating current overcurrent includes:

[0037] Executing an operation of changing the closing value from 0 to 100% to simulate the wheel entering a first airborne state;

[0038] Execute the operation of closing the value in the first interval to simulate the wheel entering the first landing state;

[0039] Execute the operation of closing the value to 0 to simulate the wheel entering the second landing state;

[0040] Executing the operation of closing the value in the first interval to simulate the wheel entering the second airborne state;

[0041] Execute the operation with the closing value of 100% to simulate the wheel entering the third airborne state;

[0042] Execute the operation of closing the value in the first interval to simulate the wheel entering the third landing state;

[0043] Release the control of the brake disc;

[0044] An acquisition module, used for synchronously measuring relevant parameters in the step of performing the operation of simulating current overcurrent, so as to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters at least include current and temperature;

[0045] The drive motor control module is used to control the drive motor to reduce torque when the simulated wheel enters a first vacant state, a first grounded state, a second vacant state, a third vacant state, and a third grounded state.

[0046] In a third aspect, the present invention further provides an electronic device, comprising a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor implements the steps of the simulation method when executing the program.

[0047] The beneficial effects of the present invention are as follows: by simulating the changes in the vehicle's driving state caused by the vehicle passing over a speed bump and / or the vehicle skidding, the relevant parameters corresponding to the vehicle during the vacancy process are obtained. By measuring the relevant parameters, the results can be integrated into the MCU software in the subsequent process, and the adjustment of the control parameters can be determined through analysis, thereby facilitating the reduction of the probability of a motor overcurrent failure when the subsequent vehicle is vacated again. The present application can collect the relevant parameters through a simulation device. Compared with the prior art method of collecting data through on-road field tests of the vehicle, the simulation method of the present application can simplify the method of collecting the relevant parameters, reduce the cost of collecting the relevant parameters, and improve the safety of collecting the relevant parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a flow chart of a method for simulating overcurrent of a phase current of a motor of a vehicle according to the present invention;

[0049] Figure 2 It is a schematic diagram of the flow chart included in the execution of step S120 in the present invention;

[0050] Figure 3 It is a schematic diagram of the flow chart included in the execution of step S110 in the present invention;

[0051] Figure 4 is an internal structural diagram of the computer device of the present invention;

[0052] Figure 5 is a structural block diagram of the simulation device of the present invention;

[0053] Figure 6 It is a structural connection diagram of the simulation device of the present invention. DETAILED DESCRIPTION

[0054] The following examples are provided to further explain and supplement the present invention and do not constitute any limitation to the present invention.

[0055] In the prior art, due to the lack of simulation of vehicle vacancy caused by vehicle deceleration or wheel slippage, the relevant data on current overcurrent caused by vehicle vacancy can only be obtained by field testing the vehicle on the road, but this method has low safety and high cost. Therefore, based on the above shortcomings, this application proposes a simulation method for vehicle motor phase current overcurrent, which simulates the current overcurrent scenario through a simulation device and collects relevant data. The following describes an embodiment of the present invention in conjunction with the accompanying drawings.

[0056] In one embodiment of the present application, see Figure 1 , a vehicle motor phase current overcurrent simulation method is provided, which is used to simulate the current overcurrent situation occurring in a set scenario through a simulation device, the simulation device includes a drive motor and a brake disc, and the simulation method includes:

[0057] Step S120, performing an operation of simulating current overcurrent according to the adjustment of the closing value of the brake disc.

[0058] In conventional scenarios when the vehicle is running, the scenarios that cause the vehicle to become airborne and cause current to flow over include: the vehicle passes over a speed bump, and / or the vehicle slips. As can be seen from the above, when the vehicle is running, the reason why the vehicle becomes airborne and causes current to flow over may include only one situation, such as the vehicle passes over a speed bump or the vehicle slips; or, the reason why the vehicle becomes airborne and causes current to flow over may include both situations, that is, the vehicle passes over a speed bump and the vehicle slips at the same time.

[0059] Taking the example of a vehicle passing over a speed bump, the following explains why an overcurrent condition may occur in a vehicle: when a vehicle passes over a speed bump at high speed (for example, when the vehicle is at full throttle), due to the intermittent loss of road friction and the high electromagnetic torque, the rate of change of the motor's acceleration and deceleration is much faster than when the vehicle is driving normally. The motor speed changes too quickly, posing a challenge to the stability of the motor controller and causing a three-phase overcurrent fault or overtemperature fault.

[0060] Taking vehicle skidding as an example, the following explains why an overcurrent condition may occur in a vehicle: when a vehicle skids, the friction between the wheels and the ground decreases sharply, causing the wheels to spin; this spinning phenomenon will suddenly reduce the actual load of the motor, but the output power of the motor does not immediately decrease accordingly, which may cause an instantaneous increase in current, i.e., an overcurrent phenomenon.

[0061] The main function of the ABS system (anti-lock braking system) is to prevent the wheels from locking during braking, thereby maintaining the stability of the vehicle and shortening the braking distance. When the wheel slip rate (the proportion of wheel sliding components) reaches a certain value, the ABS system will intervene and adjust the brake pressure to prevent the wheels from locking. When passing over a speed bump, if the vehicle speed is fast and the speed bump is designed to be high, the vehicle may become airborne; this airborne phenomenon will cause the contact state between the wheel and the ground to change instantly, thereby affecting the wheel speed and slip rate; if the wheel slip rate and vehicle speed meet the activation conditions of the ABS system at this time, the ABS system will start and adjust the wheel brake pressure to prevent the wheel from locking.

[0062] It can be known from the principle of ABS system triggering that when the vehicle simulated in this application passes over a speed bump at high speed, the vehicle will be airborne and the vehicle speed will be relatively high, so the airborne state of this application will trigger the ABS system; correspondingly, in the first airborne state and the third airborne state, in order to simulate the triggering of the vehicle's ABS system, the brake disc closing value is set to 100%.

[0063] Since the corresponding operation when the vehicle is airborne includes the control of the brake disc, the closing value of the brake disc is adjusted in the above steps to facilitate the corresponding operation when the current is over-current.

[0064] The corresponding operations when the vehicle is airborne also include synchronous control of the drive motor. Therefore, in order to better simulate the scenario of "the vehicle passing over a speed bump and / or the vehicle skidding", the drive motor is also adjusted synchronously when the brake disc is controlled.

[0065] Because when the vehicle is actually in the state of "the vehicle passes over a speed bump and / or the vehicle skids", the vehicle will perform repeated operations of taking off, landing, taking off again, and landing again. In this process, the problem of overcurrent is most likely to occur in the first few times of taking off and landing. Therefore, based on this, the following step-by-step simulation operations of taking off and landing are implemented.

[0066] See also Figure 2 , the operation of performing the simulation of current overcurrent includes:

[0067] Step S121 , executing the operation of closing the value from 0 to 100%, driving the motor to reduce the torque to simulate the wheel entering the first vacant state.

[0068] When the vehicle enters the state of "vehicle passing over speed bump and / or vehicle skidding", the vehicle will be lifted for the first time. The first lift state corresponds to the first lift state. During the first lift, the operations performed on the brake disc are: first fully open the brake disc, then fully close the brake disc; equivalent to first adjusting the brake disc closing value to 0, then adjusting the brake disc closing value to 100%. In addition, when adjusting the brake disc closing value, it is necessary to cooperate with the drive motor to reduce the torque. The first lift state corresponds to the state of the ABS system being triggered.

[0069] Step S122, executing the operation of closing the value in the first interval, driving the motor to reduce the torque to simulate the wheel entering the first landing state.

[0070] After the vehicle is lifted off for the first time, it will land. The first landing state here means that the vehicle has just touched the ground, that is, the state in which the vehicle has just landed. In this state, the vehicle's wheels are in a state of just touching the ground. When the vehicle enters the first landing state, the closing value needs to be adjusted so that the closing value enters the first interval. The first landing state corresponds to the state of releasing the ABS system.

[0071] Step S123, executing an operation with a closing value of 0 to simulate the wheels entering a second landing state.

[0072] After the vehicle completes its first take-off and has just landed, the vehicle will enter a second landing state. The second landing state is when the vehicle is completely landed. In this state, the vehicle's wheels are in full contact with the ground. When the vehicle enters the second landing state, the shutdown value needs to be adjusted so that the shutdown value is adjusted to 0.

[0073] Step S124, executing the operation of closing the value in the first interval, driving the motor to reduce the torque to simulate the wheel entering the second vacant state.

[0074] After the vehicle completes the first liftoff, the vehicle just lands, and the vehicle completely lands, the vehicle will enter a second liftoff state. The second liftoff state is when the vehicle is lifted off again and the wheels have just left the ground. In this state, the vehicle's wheels are in a state of just leaving the ground. When the vehicle enters the second liftoff state, the closing value needs to be adjusted so that the closing value falls within the first interval.

[0075] Step S125, executing the operation of the closing value being 100%, driving the motor to reduce the torque to simulate the wheel entering the third vacant state.

[0076] After the vehicle is first lifted off, just landed, completely landed, and lifted off again with the wheels just off the ground, the vehicle will enter the third lift-off state, which is the state where the vehicle is completely lifted off, in which the wheels of the vehicle are completely off the ground; when the vehicle enters the third lift-off state, the closing value needs to be adjusted so that the closing value becomes 100%. The third lift-off state corresponds to the state where the ABS system is triggered.

[0077] In the embodiment, a closing value of 0 means that the brake disc is fully opened, and a closing value of 100% means that the brake disc is fully closed.

[0078] Step S126, executing the operation of closing the value in the first interval, driving the motor to reduce the torque to simulate the wheels entering the third landing state.

[0079] After the vehicle is first lifted off, the vehicle has just landed, the vehicle has completely landed, the vehicle is lifted off again and the wheels have just left the ground, and the vehicle is completely lifted off, the vehicle will enter the third landing state, which is the state where the vehicle has just landed, in which the vehicle's wheels are just in contact with the ground; when the vehicle enters the third landing state, the closing value needs to be adjusted so that the closing value enters the first interval. The third landing state corresponds to the state of releasing the ABS system.

[0080] Step S127, releasing the control of the brake disc.

[0081] After the vehicle simulation completes the above steps S121 to S126, the vehicle speed has been gradually reduced. During the entire vehicle vacancy process, since the most likely time for overcurrent is the stage of steps S121 to S126, the probability of overcurrent in the vehicle is greatly reduced after this step. Therefore, after step S126, the control of the brake disc can be released and the pressure on the brake disc can be adjusted to 0; or, after step S126, the operation of steps S123 to S126 can be repeated until the vehicle speed drops to the set range or the vehicle stops, so as to fully record the changes in various parameters of the vehicle in the entire process.

[0082] In the embodiment, when executing any operation in step S123 to step S126, the execution of each step involves changing the brake disc closing value. In each step, the brake disc closing value is changed within a preset time, and the preset time is no more than 100ms.

[0083] Step S130, in the step of executing the operation of simulating current overcurrent, synchronously measuring relevant parameters to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters at least include current and temperature.

[0084] When executing step S120, relevant parameters need to be measured synchronously to facilitate data collection and subsequent judgment on whether there is a risk of motor overcurrent when executing the operation of simulating current overcurrent, thereby achieving the effect of collecting relevant parameters only through the simulation device.

[0085] The solution of the present application is adopted to simulate the changes in the vehicle's driving state caused by the vehicle passing over a speed bump and / or the vehicle skidding, so as to obtain the relevant parameters corresponding to the vehicle during the vacancy process. By measuring the relevant parameters, it is convenient to integrate the results into the MCU software later, and to decide on the adjustment of the control parameters through analysis, so as to reduce the probability of motor overcurrent failure when the subsequent vehicle is vacated again. The present application can collect relevant parameters through a simulation device. Compared with the method of collecting data through on-road field tests in the prior art, the simulation method of the present application can simplify the method of collecting relevant parameters, reduce the cost of collecting relevant parameters, and improve the safety of collecting relevant parameters.

[0086] Specifically, the present application only involves simulating the vehicle driving state corresponding to the current overcurrent and collecting relevant parameters, and does not involve the specific optimization process of the control parameters. The specific optimization method of the control parameters is not within the protection scope of the present application.

[0087] In the embodiment, the ABS system is triggered every time the wheel is in the air, and the corresponding operations are step S121 and step S125.

[0088] In one embodiment of the present application, before releasing the control of the brake disc, it also includes cyclically executing the steps of the simulated wheel entering a second grounded state, the simulated wheel entering a second air-lifted state, the simulated wheel entering a third air-lifted state and the simulated wheel entering a third grounded state.

[0089] After executing steps S121 to S126, the vehicle speed has been partially reduced compared to step S121. However, in the actual operation process of simulating the vehicle, the vehicle will not stop directly, and the vehicle may still perform multiple take-off and landing actions. Therefore, in the simulation method of the present application, the operations of steps S123 to S126 can be executed repeatedly to simulate multiple take-off and landing of the vehicle, so that more complete relevant parameters can be collected.

[0090] In one embodiment of the present application, executing the operation with the closing value in the first interval includes: executing the operation with the closing value of the brake disc between 30% and 70%.

[0091] Specifically, by setting the first interval to 30%-70%, that is, when the vehicle is in the first landing state, the second vacant state or the third landing state, the closing value of the brake disc corresponding to the vehicle is within the interval of 30%-70%.

[0092] In one embodiment of the present application, the simulation method includes: cyclically executing the operation of simulating current overcurrent, and each time the operation of simulating current overcurrent is executed, the drive motor corresponds to a different output speed.

[0093] In the embodiment, after the simulation device is installed, S120 needs to be repeatedly executed multiple times to simulate the vehicle passing over a speed bump and / or the vehicle skidding at different drive motor speeds. In order to cover the speed range of various vehicles, when the vehicle executes S120 for the first time, the initial speed of the corresponding drive motor may be 1000 rpm; when the vehicle executes S120 for the second time, the initial speed of the corresponding drive motor may be 2000 rpm; when step S120 is repeatedly executed in sequence, the speed is assigned in an incremental manner; in addition, S120 is repeated at least twice to ensure the data volume of the measured related parameters.

[0094] In one embodiment of the present application, in the step of executing the operation of simulating current overcurrent, relevant parameters are synchronously measured, wherein the relevant parameters also include measurement of DC bus voltage, motor output torque, motor speed and hardware damage degree.

[0095] By measuring the relevant parameters, it is convenient to analyze and process the data later and adjust the control parameters of the vehicle to avoid overcurrent in subsequent vehicles.

[0096] In the embodiment, the relevant parameters may be exemplarily: DC bus voltage and current of the drive motor; torque and speed of the drive motor; winding temperature of the drive motor; fault list parameters of the drive motor; other specially defined measurement parameters, etc.

[0097] In one embodiment of the present application, in the step of executing the operation of simulating current overcurrent, that is, in executing step S120, it also includes judging the operating state of the simulation device, including:

[0098] If any one of the current, temperature and hardware damage exceeds the corresponding preset range, the simulation device will shut down.

[0099] Since the current, temperature and hardware damage degree will affect the safety and operational sustainability of the simulation device, corresponding preset ranges are set for these three items. When the current, temperature and hardware damage degree exceed the corresponding preset ranges, the device will be shut down immediately to protect the simulation device. At the same time, the relevant parameters at the time of shutdown will be recorded synchronously to facilitate subsequent adjustment of the control parameters, thereby reducing the recurrence of the current, temperature and hardware damage degree exceeding the corresponding preset ranges in this embodiment.

[0100] In one embodiment of the present application, see Figure 3 , the simulation device includes a bench, and before the step of performing the operation of simulating current overflow according to the adjustment of the closing value of the brake disc, that is, before performing step S120, it also includes presetting the simulation device;

[0101] Step S110, pre-setting the simulation device.

[0102] Before performing step S120, the simulation device needs to be pre-set, that is, the simulation device needs to be installed and pre-set.

[0103] Step S111, installing the stand.

[0104] In the embodiment, the test bench is installed, the drive motor is installed on the test bench, the high-voltage wire harness and the low-voltage wire harness between the drive motor and the controller are connected, the cooling water pipe is connected, and the cooling flow rate (12L / min) and the cooling water temperature (65°C) are set according to the actual operating status of the vehicle.

[0105] Under normal circumstances, the drive motor is set as the torque loop, the dynamometer is set as the speed loop, and the drive motor is set to work in the feeding mode; the tooling of the drive motor is fixed on the test bench, and the brake system and the dynamometer are connected. The DC bus voltage of the motor controller is set to the rated voltage of the drive motor, the rated operating speed, and the motor is operated at the rated torque output; here, it is not considered whether the drive motor is in the no-load or loaded state.

[0106] Step S112, establishing communication between the platform and the driving motor.

[0107] The test bench is connected to the driving motor so that the control system can control the driving motor, thereby making the driving motor operate according to the set simulation method.

[0108] In the embodiment, there are two control schemes for the braking system: Scheme 1, using a bench device to simulate the voltage signal of the brake pedal, and adjusting the braking percentage to control the hydraulic brake pump or the electromagnetic brake pump, with a control signal accuracy of ≤10ms; Scheme 2, using a CANoe device to simulate sending relevant control messages, using a 10ms switch signal to simulate the on and off time of the control brake signal, requiring a vehicle-side VCU controller and related wiring harnesses for the control of the braking system.

[0109] Step S113, setting the simulation device according to the corresponding test conditions.

[0110] In the embodiment, the pre-setting of the simulation device may also include the setting of the experimental environment, such as making the altitude not exceed 1000 meters, the air pressure between 86KPa and 106KPa, the indoor temperature of the test being 23℃±5℃, and the humidity of the experimental environment being 10% to 90%. Before conducting the simulation experiment, the simulation device must be placed in the experimental environment for at least one hour so that the temperature difference between the simulation device and the ambient temperature does not exceed 2K. In addition, the flow rate of cooling water should meet the actual flow rate requirements of the vehicle, and the amount of cooling oil should meet the actual oil amount requirements of the vehicle.

[0111] In one embodiment of the present application, the simulation method further includes:

[0112] Step S140, controlling the motor to execute an energy recovery instruction according to the external negative torque, and performing an operation of simulating current overcurrent.

[0113] In the embodiment, when simulating the operation of the vehicle energy recovery condition, a negative torque is given by the test bench, that is, a negative torque is given to the dynamometer, the drive motor is reversely dragged by the dynamometer to run, and the operation of simulating current overcurrent (step S120) is repeated, and step S120 is repeated 10 times, each group containing 10 simulation tests.

[0114] It should be understood that although Figure 1 , Figure 2 and Figure 3 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0115] In one embodiment of the present application, see Figure 5 The present invention also provides a phase current overcurrent simulation device for simulating the current overcurrent situation occurring in a set scenario. The simulation device includes a brake disc control module 210, a collection module 220 and a drive motor control module 230, wherein:

[0116] The brake disc control module 210 performs an operation of simulating current overcurrent according to the adjustment of the closing value of the brake disc;

[0117] The operation of simulating current overcurrent includes:

[0118] Executing an operation of changing the closing value from 0 to 100% to simulate the wheel entering a first airborne state;

[0119] Execute the operation of closing the value in the first interval to simulate the wheel entering the first landing state;

[0120] Execute the operation of closing the value to 0 to simulate the wheel entering the second landing state;

[0121] Executing the operation of closing the value in the first interval to simulate the wheel entering the second airborne state;

[0122] Execute the operation with the closing value of 100% to simulate the wheel entering the third airborne state;

[0123] Execute the operation of closing the value in the first interval to simulate the wheel entering the third landing state;

[0124] Release the control of the brake disc;

[0125] The acquisition module 220 is used to synchronously measure relevant parameters in the step of performing the operation of simulating current overcurrent, so as to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters at least include current and temperature;

[0126] The drive motor control module 230 is used to control the drive motor to reduce torque when the simulated wheel enters the first vacant state, the simulated wheel enters the first grounded state, the simulated wheel enters the second vacant state, the simulated wheel enters the third vacant state and the simulated wheel enters the third grounded state.

[0127] In one embodiment of the present application, the present invention further provides a computer device, which may also be a terminal, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement a vehicle window shading control method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0128] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0129] In one embodiment of the present application, the present invention further provides an electronic device, see Figure 6 , comprising a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor implements the following steps when executing the program:

[0130] According to the adjustment of the closing value of the brake disc, an operation of simulating current overcurrent is performed;

[0131] In the step of performing the operation of simulating current overflow, relevant parameters are synchronously measured to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature;

[0132] The operation of simulating current overcurrent includes:

[0133] Executing an operation of changing the closing value from 0 to 100% to simulate the wheel entering a first airborne state;

[0134] Execute the operation of closing the value in the first interval to simulate the wheel entering the first landing state;

[0135] Execute the operation of closing the value to 0 to simulate the wheel entering the second landing state;

[0136] Executing the operation of closing the value in the first interval to simulate the wheel entering the second airborne state;

[0137] Execute the operation with the closing value of 100% to simulate the wheel entering the third airborne state;

[0138] Execute the operation of closing the value in the first interval to simulate the wheel entering the third landing state;

[0139] Release the control of the brake disc;

[0140] Among them, when the simulated wheel enters the first vacant state, the simulated wheel enters the first grounded state, the simulated wheel enters the second vacant state, the simulated wheel enters the third vacant state and the simulated wheel enters the third grounded state, the drive motor needs to reduce torque.

[0141] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0142] Before releasing the control of the brake disc, the method further comprises:

[0143] The steps of the simulated wheels entering a second grounded state, the simulated wheels entering a second airborne state, the simulated wheels entering a third airborne state, and the simulated wheels entering a third grounded state are executed in a loop.

[0144] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0145] The execution of the closing value in the first interval operation includes:

[0146] The operation is performed with the brake disc closing value between 30% and 70%.

[0147] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0148] The simulation method comprises:

[0149] The operation of simulating current overcurrent is executed cyclically, and each time the operation of simulating current overcurrent is executed, the drive motor corresponds to a different output speed.

[0150] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0151] In the step of performing the operation of simulating current overcurrent, the relevant parameters are synchronously measured, wherein the relevant parameters also include:

[0152] The DC bus voltage, motor output torque, motor speed and hardware damage are measured.

[0153] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0154] In the step of executing the operation of simulating current overcurrent, the operation state of the simulation device is also judged, including:

[0155] If any one of the current, temperature and hardware damage exceeds the corresponding preset range, the simulation device will shut down.

[0156] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0157] The simulation device includes a bench, and before the step of performing the operation of simulating current overflow according to the adjustment of the closing value of the brake disc, the simulation device is pre-set;

[0158] The presetting of the simulation device comprises:

[0159] Installing the stand;

[0160] establishing communication between the platform and the drive motor;

[0161] The simulation device is set up according to the corresponding test conditions.

[0162] In one embodiment of the present application, when the processor executes the computer program, the processor further implements the following steps:

[0163] The simulation method further comprises:

[0164] The motor is controlled to execute energy recovery instructions according to the external negative torque, and an operation simulating current overcurrent is performed.

[0165] In one embodiment of the present application, a simulation device is provided, the simulation device is used to perform the operation of the simulation method, the simulation device includes a drive motor, a brake disc, a dynamometer, a torque damper and a control frame,

[0166] The driving motor comprises two output ends, each of which is connected to the dynamometer via a connecting tool, and the connecting tool comprises a torque damper, a flange end and a flywheel end;

[0167] The brake disc is connected to the connecting tool, and a brake master cylinder is also connected between the two brake discs;

[0168] The drive motor is also connected to a water cooler, a cooling oil tank and an MCU.

[0169] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned computer-readable storage medium may be a non-transitory computer-readable storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, RandomAccess Memory), a disk or an optical disk, and other media that can store program codes, or a transient computer-readable storage medium.

[0170] Those skilled in the art know that the present invention can be implemented as a system, method or computer program product. Therefore, the present disclosure can be specifically implemented in the following forms, namely: it can be complete hardware, it can be complete software (including firmware, resident software, microcode, etc.), or it can be a combination of hardware and software, generally referred to as "circuit", "module" or "system" herein. In addition, in some embodiments, the present invention can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code. Computer-readable storage media can be, for example, but not limited to - electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above.

[0171] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0172] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for simulating overcurrent of a vehicle motor phase, characterized in that: It is used to simulate the current overcurrent situation occurring in a set scenario through a simulation device, the simulation device includes a drive motor and a brake disc, and the simulation method includes: According to the adjustment of the closing value of the brake disc, an operation of simulating current overcurrent is performed; In the step of performing the operation of simulating current overflow, relevant parameters are synchronously measured to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters include at least current and temperature; The operation of simulating current overcurrent includes: Executing an operation of changing the closing value from 0 to 100% to simulate the wheel entering a first airborne state; Execute the operation of closing the value in the first interval to simulate the wheel entering the first landing state; Execute the operation of closing the value to 0 to simulate the wheel entering the second landing state; Executing the operation of closing the value in the first interval to simulate the wheel entering the second airborne state; Execute the operation with the closing value of 100% to simulate the wheel entering the third airborne state; Execute the operation of closing the value in the first interval to simulate the wheel entering the third landing state; Release the control of the brake disc; Among them, when the simulated wheel enters the first vacant state, the simulated wheel enters the first grounded state, the simulated wheel enters the second vacant state, the simulated wheel enters the third vacant state and the simulated wheel enters the third grounded state, the drive motor needs to reduce torque.

2. The simulation method according to claim 1, characterized in that: Before releasing the control of the brake disc, the method further comprises: The steps of the simulated wheels entering a second grounded state, the simulated wheels entering a second airborne state, the simulated wheels entering a third airborne state, and the simulated wheels entering a third grounded state are executed in a loop.

3. The simulation method according to claim 1, characterized in that: The execution of the operation of closing the value in the first interval includes: The operation is performed with the brake disc closing value between 30% and 70%.

4. The simulation method according to claim 1, characterized in that: The simulation method comprises: The operation of simulating current overcurrent is executed cyclically, and each time the operation of simulating current overcurrent is executed, the drive motor corresponds to a different output speed.

5. The simulation method according to claim 1, characterized in that: In the step of executing the operation of simulating current overcurrent, the relevant parameters are synchronously measured, wherein the relevant parameters also include: The DC bus voltage, motor output torque, motor speed and hardware damage are measured.

6. The simulation method according to claim 5, characterized in that: In the step of executing the operation of simulating current overcurrent, the operation state of the simulation device is also judged, including: If any one of the current, temperature and hardware damage exceeds the corresponding preset range, the simulation device will shut down.

7. The simulation method according to claim 1, characterized in that: The simulation device includes a bench, and before the step of performing the operation of simulating current overflow according to the adjustment of the closing value of the brake disc, the simulation device is pre-set; The presetting of the simulation device comprises: Installing the stand; establishing communication between the platform and the drive motor; The simulation device is set up according to the corresponding test conditions.

8. The simulation method according to claim 1, characterized in that: The simulation method further comprises: The motor is controlled to execute energy recovery instructions according to the external negative torque, and an operation simulating current overcurrent is performed.

9. A phase current overcurrent simulation device, characterized in that: It is used to simulate the current overcurrent situation that occurs in the set scenario. The simulation device includes: The brake disc control module performs an operation of simulating current overcurrent according to the adjustment of the closing value of the brake disc; The operation of simulating current overcurrent includes: Executing an operation of changing the closing value from 0 to 100% to simulate the wheel entering a first airborne state; Execute the operation of closing the value in the first interval to simulate the wheel entering the first landing state; Execute the operation of closing the value to 0 to simulate the wheel entering the second landing state; Executing the operation of closing the value in the first interval to simulate the wheel entering the second airborne state; Execute the operation with the closing value of 100% to simulate the wheel entering the third airborne state; Execute the operation of closing the value in the first interval to simulate the wheel entering the third landing state; Release the control of the brake disc; An acquisition module, used for synchronously measuring relevant parameters in the step of performing the operation of simulating current overcurrent, so as to optimize the control parameters of the vehicle according to the measured values ​​of the relevant parameters, wherein the relevant parameters at least include current and temperature; The drive motor control module is used to control the drive motor to reduce torque when the simulated wheel enters a first vacant state, a first grounded state, a second vacant state, a third vacant state, and a third grounded state.

10. An electronic device comprising a memory, a processor, and a program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the steps of the simulation method according to any one of claims 1 to 8 are implemented.

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