Whole machine temperature rise test method for power module

Abstract

The invention relates to a power module complete machine temperature rise test method. The method comprises the following steps that a to-be-tested power module is installed in a to-be-tested air conditioner complete machine in a closed room; connecting the to-be-tested power module with a temperature tester; starting an auxiliary air conditioner to control the room temperature of the room to be unchanged; connecting the whole to-be-tested air conditioner with a variable-frequency power supply; starting the complete air conditioner to be tested to enable the complete air conditioner to operate stably, and acquiring the operating power of the complete air conditioner to be tested and the operating temperature of a power module to be tested; adjusting the load of the to-be-tested complete air conditioner to enable the load power of the to-be-tested complete air conditioner to be the same as the operation power, enabling the to-be-tested complete air conditioner to operate stably, and obtaining the load temperature of the to-be-tested power module; and obtaining a temperature rise test result of the to-be-tested power module based on the operation temperature and the load temperature. The low-cost method provided by the invention is more beneficial for power module manufacturers to research, develop and analyze the performance of the module.

Description

Technical Field

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

[0002] In variable frequency air conditioners, the power module is the core component of the electronic control components, and the temperature rise is also a key focus. The 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 carried out in an operating laboratory. However, for power module developers, the cost of establishing an operating laboratory is high and the utilization rate of the laboratory is not high. Therefore, the operating laboratory is more suitable for air conditioner manufacturers to build and use. Ordinary module manufacturers will not build and use laboratories.

[0004] However, to test the temperature rise of the whole machine, the test results in the working laboratory are more accurate. However, due to the construction cost, maintenance cost and use cost, it is impossible to use an open laboratory to test the power module and the whole machine. Therefore, it is necessary to propose a new test method to solve the above problems. Summary of the invention

[0005] The present invention provides a method for testing the temperature rise of a power module as a whole, aiming to solve the high cost problem caused by the reliance of existing temperature rise tests on working condition laboratories.

[0006] In order to solve the above technical problems, the present invention provides a method for testing the temperature rise of a power module, comprising the following steps:

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

[0008] S2, connecting the power module to be tested to a temperature tester, wherein the temperature tester is used to obtain the temperature of the power module to be tested;

[0009] S3, turning on the auxiliary air conditioner to control the room temperature of the enclosed room to remain constant;

[0010] S4, connecting the air conditioner to be tested to a variable frequency power supply, wherein the variable frequency power supply is used to output and detect the power required for the operation of the air conditioner to be tested;

[0011] S5, turning on the air conditioner to be tested, making it run stably, and obtaining the operating power of the air conditioner to be tested and the operating temperature of the power module to be tested;

[0012] S6, adjusting the load of the air conditioner to be tested so that the load power of the air conditioner to be tested is the same as the operating power, so that it runs stably, and obtaining the load temperature of the power module to be tested;

[0013] S7. Obtaining a temperature rise test result of the power module to be tested based on the operating temperature and the load temperature.

[0014] Furthermore, the power module to be tested is fixedly mounted on the air conditioner to be tested by screws, and the temperature tester is connected to the screws by a temperature line to obtain the temperature of the power module to be tested.

[0015] Furthermore, the method for adjusting the load of the air conditioner to be tested is specifically as follows:

[0016] Adjust the return air area of ​​the outdoor unit of the air conditioner to be tested.

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

[0018] Furthermore, the variable frequency power supply is also used to detect at least one of the operating current, operating voltage and power factor of the air conditioner to be tested.

[0019] The beneficial effect achieved by the present invention is that a method for testing the temperature rise of a power module as a whole is proposed. The method can be implemented in an ordinary room and only requires conventional testing equipment such as a variable frequency power supply and a temperature meter. The construction cost is low compared to a working laboratory, and the testing process is simple and convenient. The low-cost method provided by the present invention is more conducive to the research and development of power module manufacturers and the analysis of module performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the steps of the power module temperature rise test method provided by an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of a test scenario of a power module temperature rise test method provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a case where the return air area of ​​an external unit of an air conditioner to be tested is completely blocked by an obstruction provided by an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram showing that the return air area of ​​an external unit of an air conditioner to be tested provided by an embodiment of the present invention is partially blocked by a shielding object. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0025] Please refer to Figure 1 , Figure 1 1 is a schematic diagram of the steps of a power module temperature rise test method provided by an embodiment of the present invention, wherein the power module temperature rise test method comprises the following steps:

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

[0027] S2, connecting the power module to be tested to a temperature tester, wherein the temperature tester is used to obtain the temperature of the power module to be tested;

[0028] S3, turning on the auxiliary air conditioner to control the room temperature of the enclosed room to remain constant;

[0029] S4, connecting the air conditioner to be tested to a variable frequency power supply, wherein the variable frequency power supply is used to output and detect the power required for the operation of the air conditioner to be tested;

[0030] S5, turning on the air conditioner to be tested, making it run stably, and obtaining the operating power of the air conditioner to be tested and the operating temperature of the power module to be tested;

[0031] S6, adjusting the load of the air conditioner to be tested so that the load power of the air conditioner to be tested is the same as the operating power, so that it runs stably, and obtaining the load temperature of the power module to be tested;

[0032] S7. Obtaining a temperature rise test result of the power module to be tested based on the operating temperature and the load temperature.

[0033] The test environment of the power module temperature rise test method according to the embodiment of the present invention is as follows: Figure 2 As shown, an auxiliary air conditioner 1 and a variable frequency power supply 2 are provided in a closed room 100, and the air conditioner to be tested is installed on a test frame 6, wherein the air conditioner to be tested includes an indoor unit 3 and an outdoor unit 4, and the variable frequency power supply 2 outputs power to the air conditioner to be tested through a power line 5.

[0034] Furthermore, the power module to be tested is fixedly mounted on the air conditioner to be tested by screws, and the temperature tester is connected to the screws by a temperature line to obtain the temperature of the power module to be tested.

[0035] Furthermore, the method for adjusting the load of the air conditioner to be tested is specifically as follows:

[0036] Adjust the return air area of ​​the outdoor unit of the air conditioner to be tested.

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

[0038] like Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram showing that the return air area of ​​the external unit of the air conditioner to be tested is completely blocked by an obstruction. Figure 4 The schematic diagram is that the return air area of ​​the external unit of the air conditioner to be tested is partially blocked by the shielding object. In the embodiment of the present invention, the shielding object 7 used by the external unit 4 can be a windshield made of plastic or cardboard. After the return air area of ​​the air conditioner to be tested changes and returns to the working state with stable output, the temperature rise of the corresponding power module can be analyzed by the temperature data of different loads. For example, when the return air side is completely blocked, if the recorded power of the whole machine is 1044W, the current is 4.8A, and the module temperature is 72 degrees, when the return air side is partially blocked, the power of the whole machine is 1042W, the current is 4.8A, and the module temperature is 69 degrees, then it can be considered that the temperature rise of the power module consumes more power at high temperature.

[0039] Furthermore, the variable frequency power supply is also used to detect at least one of the operating current, operating voltage and power factor of the air conditioner to be tested. By acquiring other operating data, it is helpful to analyze other electrical properties of the power module.

[0040] The beneficial effect achieved by the present invention is that a method for testing the temperature rise of a power module as a whole is proposed. The method can be implemented in an ordinary room and only requires conventional testing equipment such as a variable frequency power supply and a temperature meter. The construction cost is low compared to a working laboratory, and the testing process is simple and convenient. The low-cost method provided by the present invention is more conducive to the research and development of power module manufacturers and the analysis of module performance.

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

[0042] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0043] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0044] The embodiments of the present invention are described above in conjunction with the accompanying drawings. What is disclosed is only the preferred embodiment of the present invention. However, the present invention is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is only illustrative rather than restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms and equivalent changes without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for testing the temperature rise of a power module, characterized in that: The following steps are involved: S1. Install the power module to be tested in the air conditioner to be tested in a closed room; S2, connecting the power module to be tested to a temperature tester, wherein the temperature tester is used to obtain the temperature of the power module to be tested; S3, turning on the auxiliary air conditioner to control the room temperature of the enclosed room to remain constant; S4, connecting the air conditioner to be tested to a variable frequency power supply, wherein the variable frequency power supply is used to output and detect the power required for the operation of the air conditioner to be tested; S5, turning on the air conditioner to be tested, making it run stably, and obtaining the operating power of the air conditioner to be tested and the operating temperature of the power module to be tested; S6, adjusting the load of the air conditioner to be tested so that the load power of the air conditioner to be tested is the same as the operating power, so that it runs stably, and obtaining the load temperature of the power module to be tested; S7. Obtaining a temperature rise test result of the power module to be tested based on the operating temperature and the load temperature.

2. The power module temperature rise test method according to claim 1, characterized in that: The power module to be tested is fixedly mounted on the air conditioner to be tested by screws, and the temperature tester is connected to the screws by a temperature line to obtain the temperature of the power module to be tested.

3. The power module temperature rise test method according to claim 1, characterized in that: The method for adjusting the load of the air conditioner to be tested is specifically as follows: Adjust the return air area of ​​the outdoor unit of the air conditioner to be tested.

4. The power module temperature rise test method according to claim 3, characterized in that: In step S4, the return air area of ​​the external unit of the air conditioner to be tested is completely blocked by using a shielding object, and the operating power and the operating temperature are obtained; in step S5, the return air area of ​​the external unit of the air conditioner to be tested is reduced to 3 / 5 of the original blocking area by adjusting the shielding object, and the load temperature is obtained.

5. The power module whole machine temperature rise test method according to claim 1, characterized in that: The variable frequency power supply is also used to detect at least one of the operating current, operating voltage and power factor of the air conditioner to be tested.

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