Method for testing temperature rise of power module

Abstract

The present application relates to a kind of power module whole machine temperature rise test methods, comprising the following steps: install the power module to be measured in the closed room air conditioning machine to be measured;The power module to be measured is connected with temperature tester;Open auxiliary air conditioner, to control the room temperature to remain unchanged;The air conditioning machine to be measured is connected with variable frequency power supply;Open the air conditioning machine to be measured, make it stable operation, obtain the operating power of the air conditioning machine to be measured, and the operating temperature of the power module to be measured;Adjust the load of the air conditioning machine to be measured, make the load power of the air conditioning machine to be measured same with operating power, make it stable operation, obtain the load temperature of the power module to be measured;Based on operating temperature and load temperature, obtain the temperature rise test result of the power module to be measured.The low-cost method provided by the present application is more beneficial to the performance of power module manufacturer research and analysis module.

Description

Technical Field

[0001] This invention relates to the field of electrical testing technology, and in particular to a method for testing the overall temperature rise of a power module. Background Technology

[0002] In variable frequency air conditioners, the power module is the core component of the electronic control system, and temperature rise is also a key focus. Temperature rise refers to the temperature of each component in the electronic and electrical equipment above the ambient temperature. The performance and reliability of the power module can be judged by the temperature rise.

[0003] In conventional technology, air conditioner testing is conducted in an operating condition laboratory. However, for power module developers, the cost of building an operating condition laboratory is high, and the utilization rate of such laboratories is also low. Therefore, operating condition laboratories are more suitable for air conditioner manufacturers to build and use, while ordinary module manufacturers do not build and use such laboratories.

[0004] However, to test the overall temperature rise of the system, the results obtained in a test laboratory are more accurate. Unfortunately, due to construction, maintenance, and operating costs, it is not possible to test the power modules and the entire system in a public laboratory. Therefore, it is necessary to propose a new testing method to solve the above problems. Summary of the Invention

[0005] This invention provides a method for testing the overall temperature rise of a power module, aiming to solve the high cost problem caused by the reliance on operating condition laboratories for existing temperature rise testing.

[0006] To address the aforementioned technical problems, this invention provides a method for testing the overall temperature rise of a power module, comprising the following steps:

[0007] S1. Install the power module to be tested in the air conditioner unit under test in a closed room;

[0008] S2. Connect the power module under test to a temperature tester, the temperature tester being used to acquire the temperature of the power module under test;

[0009] S3. Turn on the auxiliary air conditioner to keep the room temperature in the sealed room constant.

[0010] S4. Connect the air conditioner under test to a frequency converter power supply. The frequency converter power supply is used to output and detect the power required for the air conditioner under test to operate.

[0011] S5. Turn on the air conditioner under test and make it run stably, and obtain the operating power of the air conditioner under test and the operating temperature of the power module under test;

[0012] S6. Adjust the load of the air conditioner under test so that the load power of the air conditioner under test is the same as the operating power, so that it runs stably, and obtain the load temperature of the power module under test.

[0013] S7. Based on the operating temperature and the load temperature, obtain the temperature rise test results of the power module under test.

[0014] Furthermore, the power module under test is fixedly mounted to the air conditioner under test by screws, and the temperature tester is connected to the screws via a temperature wire to obtain the temperature of the power module under test.

[0015] Furthermore, the method for adjusting the load of the air conditioner under test is as follows:

[0016] The return air area of ​​the outdoor unit of the air conditioning unit to be tested is adjusted.

[0017] Furthermore, in step S4, the outdoor unit return air area of ​​the air conditioner under test is completely blocked by using a blocking object, and the operating power and the operating temperature are obtained; in step S5, the outdoor unit return air area of ​​the air conditioner under test is reduced to 3 / 5 of the original blocked area by adjusting the blocking object, and the load temperature is obtained.

[0018] Furthermore, the variable frequency power supply is also used to detect at least one of the following data: operating current, operating voltage, and power factor of the air conditioner under test.

[0019] The beneficial effect achieved by this invention is that it proposes a method for testing the overall temperature rise of a power module. This method can be implemented using only an ordinary room and only requires conventional testing equipment such as frequency converters and temperature meters. Compared with the construction cost of an industrial laboratory, it is much cheaper and the testing process is simple and convenient. The low-cost method provided by this invention is more conducive to power module manufacturers in developing and analyzing the performance of their modules. Attached Figure Description

[0020] Figure 1 This is a flowchart illustrating the steps of the power module temperature rise test method provided in this embodiment of the invention.

[0021] Figure 2 This is a schematic diagram of a test scenario for the power module overall temperature rise test method provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram showing that the return air area of ​​the outdoor unit of the air conditioning unit under test is completely blocked by an obstruction, according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram showing that the return air area of ​​the outdoor unit of the air conditioning unit under test is partially blocked by an obstruction, as provided in an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating the steps of the power module overall temperature rise testing method provided in this embodiment of the invention. The power module overall temperature rise testing method includes the following steps:

[0026] S1. Install the power module to be tested in the air conditioner unit under test in a closed room;

[0027] S2. Connect the power module under test to a temperature tester, the temperature tester being used to acquire the temperature of the power module under test;

[0028] S3. Turn on the auxiliary air conditioner to keep the room temperature in the sealed room constant.

[0029] S4. Connect the air conditioner under test to a frequency converter power supply. The frequency converter power supply is used to output and detect the power required for the air conditioner under test to operate.

[0030] S5. Turn on the air conditioner under test and make it run stably, and obtain the operating power of the air conditioner under test and the operating temperature of the power module under test;

[0031] S6. Adjust the load of the air conditioner under test so that the load power of the air conditioner under test is the same as the operating power, so that it runs stably, and obtain the load temperature of the power module under test.

[0032] S7. Based on the operating temperature and the load temperature, obtain the temperature rise test results of the power module under test.

[0033] The test environment for the power module overall temperature rise test method described in this embodiment of the invention is as follows: Figure 2 As shown, an auxiliary air conditioner 1 and a variable frequency power supply 2 are installed in a sealed room 100. The air conditioner under test is installed on the test rack 6. The air conditioner under test includes an indoor unit 3 and an outdoor unit 4. The variable frequency power supply 2 outputs power to the air conditioner under test through a power cord 5.

[0034] Furthermore, the power module under test is fixedly mounted to the air conditioner under test by screws, and the temperature tester is connected to the screws via a temperature wire to obtain the temperature of the power module under test.

[0035] Furthermore, the method for adjusting the load of the air conditioner under test is as follows:

[0036] The return air area of ​​the outdoor unit of the air conditioning unit to be tested is adjusted.

[0037] Furthermore, in step S4, the outdoor unit return air area of ​​the air conditioner under test is completely blocked by using a blocking object, and the operating power and the operating temperature are obtained; in step S5, the outdoor unit return air area of ​​the air conditioner under test is reduced to 3 / 5 of the original blocked area by adjusting the blocking object, and the load temperature is obtained.

[0038] like Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram showing the outdoor unit's return air area being completely blocked by an obstruction. Figure 4 This is a schematic diagram showing the outdoor unit's return air area being partially blocked by an obstruction. In this embodiment of the invention, the obstruction 7 used for the outdoor unit 4 can be a wind deflector made of plastic or cardboard. After the return air area of ​​the air conditioner under test changes and it returns to a stable output operating state, the temperature rise of the corresponding power module can be analyzed using temperature data under different loads. For example, if the total power is recorded as 1044W, the current as 4.8A, and the module temperature as 72 degrees Celsius when the return air side is completely blocked, and the total power is recorded as 1042W, the current as 4.8A, and the module temperature as 69 degrees Celsius when the return air side is partially blocked, then it can be considered that the power module experiences a greater power consumption at higher temperatures.

[0039] Furthermore, the variable frequency power supply is also used to detect at least one of the following data: operating current, operating voltage, and power factor of the air conditioner under test. Obtaining other operating data is beneficial for analyzing other electrical performance characteristics of the power module.

[0040] The beneficial effect achieved by this invention is that it proposes a method for testing the overall temperature rise of a power module. This method can be implemented using only an ordinary room and only requires conventional testing equipment such as frequency converters and temperature meters. Compared with the construction cost of an industrial laboratory, it is much cheaper and the testing process is simple and convenient. The low-cost method provided by this invention is more conducive to power module manufacturers in developing and analyzing the performance of their modules.

[0041] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0042] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0043] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0044] The embodiments of the present invention have been described above with reference to the accompanying drawings. The disclosed embodiments are merely preferred embodiments of the present invention. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many equivalent changes in form without departing from the spirit and scope of the claims of the present invention, and all such changes are within the protection scope of the present invention.

Claims

1. A method for testing the overall temperature rise of a power module, characterized in that, Includes the following steps: S1. Install the power module to be tested in the air conditioner unit under test in a closed room; S2. Connect the power module under test to a temperature tester, the temperature tester being used to acquire the temperature of the power module under test; S3. Turn on the auxiliary air conditioner to keep the room temperature in the sealed room constant. S4. Connect the air conditioner under test to a frequency converter power supply. The frequency converter power supply is used to output and detect the power required for the air conditioner under test to operate. S5. Turn on the air conditioner under test and make it run stably, and obtain the operating power of the air conditioner under test and the operating temperature of the power module under test; S6. Adjust the load of the air conditioner under test so that the load power of the air conditioner under test is the same as the operating power, so that it runs stably, and obtain the load temperature of the power module under test. S7. Based on the operating temperature and the load temperature, obtain the temperature rise test results of the power module under test.

2. The method for testing the overall temperature rise of a power module according to claim 1, characterized in that, The power module under test is fixedly mounted to the air conditioner under test by screws, and the temperature tester is connected to the screws via a temperature wire to obtain the temperature of the power module under test.

3. The method for testing the overall temperature rise of a power module according to claim 1, characterized in that, The method for adjusting the load of the air conditioning unit under test is as follows: The return air area of ​​the outdoor unit of the air conditioning unit to be tested is adjusted.

4. The method for testing the overall temperature rise of a power module according to claim 3, characterized in that, In step S5, the return air area of ​​the outdoor unit of the air conditioner under test is completely blocked by using a blocking object, and the operating power and the operating temperature are obtained; in step S6, the return air area of ​​the outdoor unit of the air conditioner under test is reduced to 3 / 5 of the original blocked area by adjusting the blocking object, and the load temperature is obtained.

5. The method for testing the overall temperature rise of a power module according to claim 1, characterized in that, The variable frequency power supply is also used to detect at least one of the following data: operating current, operating voltage, and power factor of the air conditioner under test.

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