Power module test cooling liquid flow self-adaptive control method, device and system

Abstract

The invention relates to a power module test cooling liquid flow self-adaptive control method, device and system. The method comprises the steps that the current pressure and flow adjusting parameters of power module test cooling liquid are obtained; according to the current pressure, the flow regulation parameter and a preset multi-dimensional calibration reference table, analyzing and determining a multi-section regulation rotating speed value; wherein the multi-dimensional calibration reference table is obtained by calibrating the rotating speed of a control pump for adjusting the flow of the cooling liquid according to a set pressure range and a set flow range, and represents the corresponding relation among the pressure, the flow and the rotating speed; the rotating speed of the control pump is adjusted in a segmented mode according to the multi-segment adjusting rotating speed value, so that the cooling liquid flow is gradually adjusted to be close to the target flow; and feedback regulation is performed on the rotating speed of the control pump according to the current flow and the target flow of the cooling liquid until the current flow of the cooling liquid is matched with the target flow, so that more accurate flow regulation is realized, and the control accuracy is improved.

Description

[0001] This application claims priority to a Chinese patent application filed with the Chinese Patent Office on September 25, 2024, with application number 202411352434.8, and entitled “Method, device and system for adaptive control of coolant flow for power module testing”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of flow regulation and control, and in particular to a method, device and system for adaptively controlling the flow of cooling liquid in power module testing. Background Art

[0003] During the aging test of the power module, the module temperature will rise. In order to ensure that the module temperature is stable and does not exceed the module's tolerance limit, the module must be cooled, so cooling water is used to keep the module at a constant temperature. The traditional power module water cooling adjustment method is to set the target flow, monitor the water flow through a sensor, and use the water flow as feedback to control the flow valve switch to achieve water flow regulation. It is difficult to achieve high-precision control and has the disadvantage of low control accuracy. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device and system for adaptively controlling the coolant flow rate of a power module test, which can improve the control accuracy, in order to address the above problems.

[0005] A first aspect of the present application provides a method for adaptively controlling the flow rate of a coolant in a power module test, comprising:

[0006] Get the current pressure and flow adjustment parameters of the power module test coolant;

[0007] According to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table, the multi-stage adjustment speed value is analyzed and determined; wherein the multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump for adjusting the coolant flow according to the set pressure range and flow range, and represents the corresponding relationship between pressure, flow and speed;

[0008] The speed of the control pump is adjusted in stages according to the multi-stage speed adjustment values, so that the coolant flow rate is gradually adjusted to be close to the target flow rate;

[0009] The speed of the control pump is feedback-adjusted according to the current flow rate and the target flow rate of the coolant until the current flow rate and the target flow rate of the coolant match.

[0010] In one of the embodiments, the flow adjustment parameters include current flow, target flow, flow adjustment time and adjustment interval time.

[0011] In one embodiment, analyzing and determining the multi-stage speed adjustment value according to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table includes:

[0012] Determine the number of adjustments according to the flow adjustment time and the adjustment interval time;

[0013] Determining a flow value for each adjustment according to the current flow, the target flow and the number of adjustments;

[0014] According to the current pressure and the flow value adjusted each time, the rotation speed adjusted each time is obtained from the multi-dimensional calibration reference table to obtain multiple adjustment speed values.

[0015] In one embodiment, feedback-adjusting the rotation speed of the control pump according to the current flow rate and the target flow rate of the coolant until the current flow rate of the coolant matches the target flow rate includes:

[0016] Determine the flow difference according to the current flow and target flow of the coolant;

[0017] The rotation speed of the control pump is PI (proportional integral) adjusted according to the flow difference until the difference between the current flow rate of the coolant and the target flow rate is within a set error range.

[0018] In one embodiment, before analyzing and determining the multi-stage adjustment speed value according to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table, the method further includes:

[0019] According to the set pressure range and flow range, the speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table.

[0020] In one embodiment, the speed of the control pump is calibrated according to the set pressure range and flow range to obtain a multi-dimensional calibration reference table, including:

[0021] Determine the pressure value array according to the set pressure range and pressure adjustment step value;

[0022] Determine the flow value array according to the set flow range and flow adjustment step value;

[0023] According to the pressure value array and the flow value array, the rotation speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table.

[0024] In one embodiment, the speed of the control pump is calibrated according to the pressure value array and the flow value array to obtain a multi-dimensional calibration reference table, including:

[0025] The pressure of the coolant is kept unchanged at one of the pressure values ​​in the pressure value array in sequence. When the flow rate of the coolant is adjusted to each flow value in the flow value array, the speed of the control pump is recorded to obtain the corresponding relationship between the flow rate and the speed under each pressure as the multi-dimensional calibration reference table.

[0026] In one embodiment, the speed of the control pump is calibrated according to the pressure value array and the flow value array to obtain a multi-dimensional calibration reference table, including:

[0027] The flow rate of the coolant is kept constant at one of the flow values ​​in the flow value array, and when the pressure of the coolant is adjusted to each pressure value in the pressure value array, the speed of the control pump is recorded to obtain the corresponding relationship between the pressure and the speed at each flow rate as the multi-dimensional calibration reference table.

[0028] A second aspect of the present application provides a power module test coolant flow adaptive control device, comprising:

[0029] A parameter acquisition module is used to obtain the current pressure and flow adjustment parameters of the power module test coolant;

[0030] A data analysis module, used to analyze and determine the multi-stage adjustment speed value according to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table; wherein the multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump for adjusting the coolant flow according to the set pressure range and flow range, and represents the corresponding relationship between pressure, flow and speed;

[0031] The flow regulating module is used to adjust the speed of the control pump in stages according to the multi-stage adjustment speed values ​​so that the coolant flow is gradually adjusted to be close to the target flow; and the speed of the control pump is feedback-regulated according to the current flow and target flow of the coolant until the current flow and target flow of the coolant match.

[0032] A third aspect of the present application provides a power module testing system, comprising a pressure detection unit, a flow detection unit, a control pump and a controller, wherein the pressure detection unit is used to detect the current pressure of the coolant, the flow detection unit is used to detect the current flow of the coolant, the controller is connected to the pressure detection unit, the flow detection unit and the control pump, and the controller performs adaptive control of the coolant flow according to the above method.

[0033] The above-mentioned power module test coolant flow adaptive control method, device and system obtain the current pressure and flow adjustment parameters of the power module test coolant, analyze and determine the multi-stage adjustment speed value according to the current pressure, flow adjustment parameters and the preset multi-dimensional calibration reference table; the speed of the control pump is segmented according to the multi-stage adjustment speed value, so that the coolant flow is gradually adjusted to close to the target flow, and then the speed of the control pump is feedback-adjusted according to the current flow and target flow of the coolant until the current flow and target flow of the coolant match. By combining the current pressure, flow adjustment parameters and the preset multi-dimensional calibration reference table to gradually adjust the speed of the control pump so that the current flow of the coolant is close to the target flow, and then using feedback adjustment to control the speed so that the current flow and the target flow match, more precise flow regulation is achieved, and control accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of a method for adaptively controlling coolant flow rate in power module testing in one embodiment;

[0035] Figure 2 A flowchart of analyzing and determining multi-stage speed adjustment values ​​according to current pressure, flow adjustment parameters and a preset multi-dimensional calibration reference table in an embodiment;

[0036] Figure 3 It is a flow chart of performing feedback adjustment on the rotation speed of the control pump according to the current flow rate and the target flow rate of the coolant in one embodiment until the current flow rate of the coolant matches the target flow rate;

[0037] Figure 4 A flow chart of a method for adaptively controlling the flow rate of cooling liquid for power module testing according to another embodiment;

[0038] Figure 5 It is a flow chart of calibrating the rotation speed of a control pump according to a set pressure range and flow range to obtain a multi-dimensional calibration reference table in an embodiment;

[0039] Figure 6 It is a structural block diagram of a coolant flow adaptive control device for power module testing in one embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] In one embodiment, Figure 1 As shown, a method for adaptively controlling the flow rate of cooling liquid in a power module test is provided, comprising:

[0043] Step S110: obtaining current pressure and flow adjustment parameters of the power module test coolant.

[0044] Among them, the coolant used when testing the power module can be water or other media. A pressure detection unit can be set in the pipeline for conveying the coolant to detect the current pressure of the coolant. The types of flow regulation parameters are not unique, and the types of flow regulation parameters can be set according to the needs of the actual scene. For example, the flow regulation parameters can include the current flow, target flow, adjustment time and adjustment interval to determine the flow value of each adjustment; the flow regulation parameters can also include the current flow, target flow and the number of adjustments, which can also be used to determine the flow value of each adjustment. In addition, the flow regulation parameters can also directly include the flow value of each adjustment. In this embodiment, the flow regulation parameters include the current flow, target flow, adjustment time and adjustment interval. The current flow can be detected by setting a flow detection unit in the pipeline for conveying the coolant, and the target flow, adjustment time and adjustment interval can be determined by inputting through the interactive interface.

[0045] Step S120: Analyze and determine the multi-stage adjustment speed values ​​according to the current pressure, flow adjustment parameters and a preset multi-dimensional calibration reference table.

[0046] Among them, the multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump that adjusts the coolant flow according to the set pressure range and flow range, and represents the corresponding relationship between pressure, flow and speed. The control pump can specifically adopt a servo pump, and the control pump can also be set in the pipeline for conveying coolant. The flow of coolant can be adjusted by adjusting the speed of the control pump. The flow value of each adjustment can be determined according to the flow adjustment parameter, and the corresponding relationship between the flow and speed under the current pressure can be determined according to the current pressure and the multi-dimensional calibration reference table. The combination of the two can obtain the required speed corresponding to the flow value of each adjustment.

[0047] In one embodiment, Figure 2 As shown, step S120 includes steps S122 to S126.

[0048] Step S122: Determine the number of adjustments according to the flow adjustment time and the adjustment interval time. The number of adjustments can be obtained by dividing the flow adjustment time by the adjustment interval time.

[0049] Step S124: Determine the flow value for each adjustment based on the current flow, target flow and number of adjustments. Subtract the current flow from the target flow, divide the difference equally based on the number of adjustments, and obtain the amplitude value for each adjustment. Based on the relationship between the current flow and the target flow, increase / decrease an amplitude value on the basis of the current flow to obtain the flow value for each adjustment.

[0050] Step S126: According to the current pressure and the flow value of each adjustment, the speed of each adjustment is searched and obtained from the multi-dimensional calibration reference table to obtain the multi-stage adjustment speed value. After determining the flow value of each adjustment, combined with the corresponding relationship between the flow and the speed under the current pressure determined in the multi-dimensional calibration reference table, the speed corresponding to the flow value of each adjustment can be obtained, and the multi-stage adjustment speed value can be obtained.

[0051] Step S130: The speed of the control pump is adjusted in stages according to the multi-stage adjustment speed values, so that the coolant flow rate is gradually adjusted to be close to the target flow rate.

[0052] By splitting the target flow and setting the speed of the control pump in sections for adjustment, the coolant flow can be stably and quickly changed to close to the target flow, and excessive changes in water pressure can be avoided. After each section of speed adjustment, you can also wait for a set time (such as 500ms) before adjusting the next section of speed. Among them, if the target flow is greater than the current flow, the multi-section adjustment speed value is gradually increased, thereby gradually increasing the coolant flow; if the target flow is less than the current flow, the multi-section adjustment speed value is gradually reduced, thereby gradually reducing the coolant flow. In addition, if the target flow is equal to the current flow, the current speed of the control pump can be kept unchanged, or a flow adjustment can be performed, that is, the target flow is used as the flow value to be adjusted, and the speed to be adjusted is obtained from the multi-dimensional calibration reference table. The speed of the control pump is adjusted once to ensure that the speed of the control pump is accurate.

[0053] Step S140: feedback-adjusting the rotation speed of the control pump according to the current flow rate and the target flow rate of the coolant until the current flow rate of the coolant matches the target flow rate.

[0054] After the speed adjustment is completed, the flow rate of the coolant is very close to the target flow rate, but there is still a deviation. Therefore, the speed of the control pump is feedback-adjusted according to the current flow rate newly detected by the flow detection unit until the current flow rate of the coolant matches the target flow rate. The current flow rate of the coolant matches the target flow rate, which can mean that the current flow rate is equal to the target flow rate, or that the difference between the current flow rate and the target flow rate is within the allowable error range.

[0055] In one embodiment, Figure 3 As shown, step S140 includes step S142 and step S144.

[0056] Step S142: Determine the flow difference according to the current flow rate and the target flow rate of the coolant. Subtract the collected current flow rate of the coolant from the set target flow rate to obtain the flow difference Δ 流量 .

[0057] Step S144: PI adjustment is performed on the speed of the control pump according to the flow difference until the difference between the current flow rate of the coolant and the target flow rate is within the set error range. 流量 Substitute into the formula: Δn=Δ 流量 *kp+ki, calculate the speed difference Δn, where kp and ki are the proportional adjustment coefficient and the integral adjustment coefficient respectively. Add the speed difference to the current speed of the control pump and set the speed again, then read the flow feedback, and repeatedly adjust the speed until the difference between the current flow of the coolant and the target flow is within the set error range.

[0058] In this embodiment, after the segmented speed adjustment is completed, the PI adjustment link is entered, and the speed of the control pump is dynamically and continuously adjusted according to the flow feedback, and the target flow is continuously iterated to reach the desired flow output range. In the entire control process, the refined pressure, flow and speed control strategy ensures the efficient and stable operation of the system performance.

[0059] In one embodiment, Figure 4 As shown, before step S120, the method further includes step S100: according to the set pressure range and flow range, the speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table. The specific value range of the pressure range and the flow range can be set according to actual needs and equipment performance, and the pressure and flow are used as two variables to analyze the speed of the control pump under different pressures / flows, calibrate to obtain a multi-dimensional calibration reference table, determine the corresponding relationship between pressure, flow and speed, and use the flow corresponding to the target speed as the adjustment feedforward to improve the control response speed.

[0060] Furthermore, if Figure 5 As shown, step S100 may include steps S102 to S106.

[0061] Step S102: Determine the pressure value array according to the set pressure range and pressure adjustment step value. The pressure adjustment step value refers to the span of each pressure adjustment, and its value can be set according to the desired accuracy. Determine the minimum pressure value and the maximum pressure value according to the set pressure range, and then start from the minimum pressure value according to the pressure adjustment step value, and add the pressure adjustment step value each time as the next pressure value to obtain a set of pressure value arrays as the input of the pressure value during multi-dimensional calibration.

[0062] Step S104: Determine the flow value array according to the set flow range and flow adjustment step value. The flow adjustment step value refers to the span of each flow adjustment, and its value can be set according to the desired accuracy. Determine the minimum flow value and the maximum flow value according to the set flow range, and then start from the minimum flow value according to the flow adjustment step value, and add the flow adjustment step value each time as the next flow value to obtain a set of flow value arrays as the input of the water flow value during multi-dimensional calibration.

[0063] Step S106: According to the pressure value array and the flow value array, the speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table. Specifically, the pressure of the coolant may be kept unchanged at one of the pressure values ​​in the pressure value array, and when the flow rate of the coolant is adjusted to each of the flow values ​​in the flow value array, the speed of the control pump is recorded to obtain the corresponding relationship between the flow rate and the speed at each pressure as a multi-dimensional calibration reference table. Alternatively, the flow rate of the coolant may be kept unchanged at one of the flow value arrays, and when the pressure of the coolant is adjusted to each of the pressure values ​​in the pressure value array, the speed of the control pump is recorded to obtain the corresponding relationship between the pressure and the speed at each flow rate as a multi-dimensional calibration reference table.

[0064] Taking the example of keeping the coolant pressure as one of the pressure values ​​in the pressure value array and adjusting the coolant flow rate to calibrate the speed for each flow value in the flow value array, the multi-dimensional calibration operation process is as follows:

[0065] 1. First, set the initial pressure condition and select the minimum pressure value, such as 1 kilopascal (KPa), to ensure that the system is in a stable state. Next, adjust the control pump to stabilize the coolant flow at 1 liter per minute (1L / min). In this state, record the exact speed value of the servo pump.

[0066] 2. While keeping the pressure constant at 1KPa, adjust the speed of the control pump to gradually increase the coolant flow. For example, start with the minimum flow (such as 1L / min), and increase by 1L / min each time. When it is adjusted to 2L / min, after the flow rate stabilizes, measure and record the speed of the servo pump again. Then adjust the speed of the control pump again. When the flow rate stabilizes at 3L / min, measure and record the speed of the servo pump again, and keep the pressure constant. Repeat this process until the flow reaches the maximum value. After each adjustment, the flow rate must be stable and the corresponding speed must be recorded.

[0067] 3. After the above process is completed, only the pressure parameter is adjusted up to the next pressure value, such as 2KPa. Under the same pressure condition, starting from the minimum flow value (such as 1L / min), the flow rate is increased step by step in the same increment and the pressure is maintained unchanged, and the speed data at each flow level is continued to be recorded. In this process, the relationship between the flow rate, pressure and speed will become closer with subtle adjustments.

[0068] 4. Finally, all the data are summarized into a table, as shown in Table 1.

[0069] Table 1

[0070] Flow 1 Traffic 2 Flow 3 Flow 4 …… Pressure 1 Speed ​​1 Speed ​​2 Speed ​​3 Speed ​​4 …… Pressure 2 Speed ​​5 Speed ​​6 Speed ​​7 Speed ​​8 …… Pressure 3 Speed ​​9 Speed ​​10 Speed ​​11 Speed ​​12 …… ……

[0071] After completing the entire multi-dimensional calibration process, a series of detailed pressure, flow and speed corresponding data tables can be obtained, which can be used for precise control of coolant flow during power module testing.

[0072] In the actual application stage, according to the relationship between the current flow rate of the coolant and the target flow rate, it can be divided into three situations: flow rate increase, flow rate decrease and flow rate remain unchanged. Taking the servo pump speed adjustment as an example, the detailed process is as follows:

[0073] 1. When the flow rate increases

[0074] Assuming that the current flow rate is 5L / min and needs to be changed to 10L / min, the target flow rate is 10L / min. Assuming that the current pressure is 2KPa, the flow adjustment time is set to 2s, and the adjustment interval is 500ms, the flow needs to be adjusted 4 times.

[0075] Flow adjustment time ÷ adjustment interval time = 2 ÷ 0.5 = 4 (times)

[0076] 5L / min to 10L / min 4 times, each time the flow rate increases:

[0077] Flow rate difference ÷ adjustment times = (10-5) ÷ 4 = 1.25 (L / min)

[0078] You need to query the multi-dimensional calibration reference table from 5L / min in sequence, set the pressure to 2KPa, and the corresponding servo pump speed value when the water flow is 6.25L / min. After 500ms, set the pressure to 2KPa, and the corresponding servo pump speed value when the water flow is 7.5L / min. After 500ms, set the pressure to 2KPa, and the corresponding servo pump speed value when the water flow is 8.75L / min. Finally, after 500ms, set the pressure to 2KPa, and the corresponding servo pump speed value when the water flow is 10L / min.

[0079] This step is to split the target flow and set the servo pump speed in sections to avoid excessive changes in water pressure.

[0080] After the segment setting is completed, enter the PI adjustment part. Read the current flow and calculate the flow difference:

[0081] Target flow - current flow = Δ 流量

[0082] Then calculate the speed difference Δn through the PI adjustment formula:

[0083] Δn=Δ 流量 *kp+ki

[0084] Then add the current speed of the servo pump to the speed difference to set the speed again, and then read the flow feedback. Repeat this process to adjust the speed until the water flow is within the error range of 10L / min.

[0085] 2. When the flow rate drops

[0086] Assuming that the current flow rate is 12L / min and needs to be changed to 8L / min, the target flow rate is 8L / min. Assuming that the current pressure is 3KPa, the flow adjustment time is set to 2s, and the adjustment interval is 500ms, the flow needs to be adjusted 4 times.

[0087] Flow adjustment time ÷ adjustment interval time = 2 ÷ 0.5 = 4 (times)

[0088] 12L / min to 8L / min 4 times, each time the flow rate decreases:

[0089] Flow rate difference ÷ adjustment times = (12-8) ÷ 4 = 1 (L / min)

[0090] It is necessary to query the multi-dimensional calibration reference table from 12L / min in sequence, set the pressure to 3KPa, and the corresponding servo pump speed value when the water flow is 11L / min. After 500ms, set the pressure to 3KPa, and the corresponding servo pump speed value when the water flow is 10L / min. After 500ms, set the pressure to 3KPa, and the corresponding servo pump speed value when the water flow is 9L / min. Finally, after 500ms, set the pressure to 3KPa, and the corresponding servo pump speed value when the water flow is 8L / min.

[0091] After the segment setting is completed, enter the PI adjustment part. Read the current flow and calculate the flow difference:

[0092] Target flow - current flow = Δ 流量

[0093] Then calculate the speed difference Δn through the PI adjustment formula:

[0094] Δn=Δ 流量 *kp+ki

[0095] Then add the current speed of the servo pump to the speed difference to set the speed again, and then read the flow feedback. Repeat this process to adjust the speed until the water flow is within the error range of 8L / min.

[0096] 3. When the flow rate remains unchanged

[0097] Assuming the current flow rate is 10L / min and the flow rate does not change, the target flow rate is 10L / min. Assuming the current pressure is 3KPa, the flow adjustment time is set to 2s, and the adjustment interval is 500ms. Since the flow rate has not changed, only one flow adjustment is required at this time.

[0098] By querying the multi-dimensional calibration reference table, set the corresponding servo pump speed value when the pressure is 3KPa and the water flow is 10L / min. Then enter the PI adjustment part. Read the current flow and calculate the flow difference:

[0099] Target flow - current flow = Δ 流量

[0100] Then calculate the speed difference Δn through the PI adjustment formula:

[0101] Δn=Δ 流量 *kp+ki

[0102] Then add the current speed of the servo pump to the speed difference to set the speed again, and then read the flow feedback. Repeat this process to adjust the speed until the water flow is within the error range of 10L / min.

[0103] It is understandable that in other embodiments, when the flow rate remains unchanged, the current speed of the servo pump may be kept unchanged without being adjusted.

[0104] The above power module test coolant flow adaptive control method has the following advantages:

[0105] 1. Through segmented setting and closed-loop control adjustment, accurate control of water flow is achieved. The servo pump speed corresponding to the set pressure and flow is calibrated in advance. When adjusting, the corresponding speed is set in segments to make the input smoother. After the segmented setting is completed, the flow is fine-tuned through PI adjustment to achieve accurate control of water flow.

[0106] 2. Through multi-dimensional calibration, the target control can be quickly adjusted. The pre-calibrated data can be used as a reference. After setting the speed, the target flow rate can be quickly approached to improve the control response speed.

[0107] 3. Use pressure as a reference factor to avoid excessive flow rate leading to excessive water pressure and causing damage to the pipeline. The impact of pressure is taken into account during multi-dimensional calibration, and the servo pump speed is set in sections to prevent excessive changes in water pressure. At the same time, this solution reads feedback and continuously controls to ensure system stability.

[0108] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0109] Based on the same inventive concept, the embodiment of the present application also provides a power module test coolant flow adaptive control device for implementing the power module test coolant flow adaptive control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more power module test coolant flow adaptive control device embodiments provided below can refer to the limitations of the power module test coolant flow adaptive control method above, and will not be repeated here.

[0110] In one embodiment, Figure 6As shown, a power module test coolant flow adaptive control device is provided, comprising: a parameter acquisition module 110, a data analysis module 120 and a flow regulation module 130, wherein:

[0111] The parameter acquisition module 110 is used to obtain the current pressure and flow adjustment parameters of the power module test coolant.

[0112] The data analysis module 120 is used to analyze and determine the multi-stage adjustment speed values ​​according to the current pressure, flow adjustment parameters and the preset multi-dimensional calibration reference table; wherein the multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump for adjusting the coolant flow according to the set pressure range and flow range, and represents the corresponding relationship between pressure, flow and speed.

[0113] The flow regulation module 130 is used to adjust the speed of the control pump in stages according to the multi-stage adjustment speed values ​​so that the coolant flow is gradually adjusted to be close to the target flow; the speed of the control pump is feedback-adjusted according to the current flow and target flow of the coolant until the current flow and target flow of the coolant match.

[0114] In one embodiment, the data analysis module 120 is further used to calibrate the rotation speed of the control pump according to the set pressure range and flow range to obtain a multi-dimensional calibration reference table.

[0115] Each module in the above-mentioned power module test coolant flow adaptive control device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0116] In one embodiment, a power module test system is also provided, including a pressure detection unit, a flow detection unit, a control pump and a controller, wherein the pressure detection unit is used to detect the current pressure of the coolant, the flow detection unit is used to detect the current flow of the coolant, the controller is connected to the pressure detection unit, the flow detection unit and the control pump, and the controller performs adaptive control of the coolant flow according to the above method. The control pump may be a servo pump, the coolant may be water or other media, the controller may be, but is not limited to, various personal computers, laptops, smart phones, tablet computers and portable wearable devices, and the portable wearable devices may be smart watches, smart bracelets, head-mounted devices, etc.

[0117] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for adaptively controlling coolant flow rate in power module testing, characterized in that: include: Get the current pressure and flow adjustment parameters of the power module test coolant; According to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table, the multi-stage adjustment speed value is analyzed and determined; wherein the multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump for adjusting the coolant flow according to the set pressure range and flow range, and represents the corresponding relationship between pressure, flow and speed; The speed of the control pump is adjusted in stages according to the multi-stage speed adjustment values, so that the coolant flow rate is gradually adjusted to be close to the target flow rate; The speed of the control pump is feedback-adjusted according to the current flow rate and the target flow rate of the coolant until the current flow rate and the target flow rate of the coolant match.

2. The method according to claim 1, characterized in that: The flow adjustment parameters include current flow, target flow, flow adjustment time and adjustment interval time.

3. The method according to claim 2, characterized in that The analyzing and determining the multi-stage speed adjustment value according to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table includes: Determine the number of adjustments according to the flow adjustment time and the adjustment interval time; Determining a flow value for each adjustment according to the current flow, the target flow and the number of adjustments; According to the current pressure and the flow value adjusted each time, the rotation speed adjusted each time is obtained from the multi-dimensional calibration reference table to obtain multiple adjustment speed values.

4. The method according to claim 1, characterized in that The feedback adjustment of the rotation speed of the control pump according to the current flow rate and the target flow rate of the coolant until the current flow rate of the coolant matches the target flow rate includes: Determine the flow difference according to the current flow and target flow of the coolant; The rotation speed of the control pump is PI-regulated according to the flow difference until the difference between the current flow rate and the target flow rate of the coolant is within a set error range.

5. The method according to any one of claims 1 to 4, characterized in that: Before analyzing and determining the multi-stage speed adjustment value according to the current pressure, the flow adjustment parameter and the preset multi-dimensional calibration reference table, the method further includes: According to the set pressure range and flow range, the speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table.

6. The method according to claim 5, characterized in that According to the set pressure range and flow range, the speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table, including: Determine the pressure value array according to the set pressure range and pressure adjustment step value; Determine the flow value array according to the set flow range and flow adjustment step value; According to the pressure value array and the flow value array, the rotation speed of the control pump is calibrated to obtain a multi-dimensional calibration reference table.

7. The method according to claim 6, characterized in that The multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump according to the pressure value array and the flow value array, including: The pressure of the coolant is kept unchanged at one of the pressure values ​​in the pressure value array in sequence. When the flow rate of the coolant is adjusted to each flow value in the flow value array, the speed of the control pump is recorded to obtain the corresponding relationship between the flow rate and the speed under each pressure as the multi-dimensional calibration reference table.

8. The method according to claim 6, characterized in that The multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump according to the pressure value array and the flow value array, including: The flow rate of the coolant is kept constant at one of the flow values ​​in the flow value array, and when the pressure of the coolant is adjusted to each pressure value in the pressure value array, the speed of the control pump is recorded to obtain the corresponding relationship between the pressure and the speed at each flow rate as the multi-dimensional calibration reference table.

9. A power module test coolant flow adaptive control device, characterized in that: include: A parameter acquisition module is used to obtain the current pressure and flow adjustment parameters of the power module test coolant; A data analysis module, used to analyze and determine the multi-stage adjustment speed value according to the current pressure, the flow adjustment parameter and a preset multi-dimensional calibration reference table; wherein the multi-dimensional calibration reference table is obtained by calibrating the speed of the control pump for adjusting the coolant flow according to the set pressure range and flow range, and represents the corresponding relationship between pressure, flow and speed; The flow regulating module is used to adjust the speed of the control pump in stages according to the multi-stage adjustment speed values ​​so that the coolant flow is gradually adjusted to be close to the target flow; and the speed of the control pump is feedback-regulated according to the current flow and target flow of the coolant until the current flow and target flow of the coolant match.

10. A power module testing system, comprising a pressure detection unit, a flow detection unit, a control pump and a controller, wherein the pressure detection unit is used to detect the current pressure of the coolant, the flow detection unit is used to detect the current flow of the coolant, the controller connects the pressure detection unit, the flow detection unit and the control pump, and the controller performs adaptive control of the coolant flow according to the method described in any one of claims 1-8.

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