Cabinet system wind resistance test method

Abstract

The invention discloses a cabinet system wind resistance test method comprising the following steps: S1, respectively measuring operation parameters of an air-discharge assembly of the cabinet under a cabinet door open and cabinet door close condition when the cabinet is powered up in operation; S2, comparing the operation parameters of the air-discharge assembly under two work conditions in the S1 with delivery test data of the air-discharge assembly so as to obtain an air quantity Q and a static pressure P of the air-discharge assembly under the cabinet door close condition, thus calculating a resistance coefficient of the cabinet system, wherein K=P / Q2; S3, using the cabinet system resistance coefficient K to draft a Q-P real performance curve in a Q-P delivery performance curve map of the air-discharge assembly, and the static pressure P matched with an intersection point between the Q-P delivery performance curve and the Q-P real performance curve is the cabinet system wind resistance value. The cabinet system wind resistance test method is simple in operation, and can accurately obtain the cabinet system wind resistance value.

Description

technical field [0001] The invention mainly relates to the technical field of cabinets, in particular to a method for testing wind resistance of a cabinet system. Background technique [0002] With the rapid development of the economy and the enhancement of people's awareness of energy conservation and environmental protection, the application of inverter devices has become more and more popular, and the scale of the industry has expanded rapidly. The degree of integration and power density of products is getting higher and higher, and the increase in power density has led to the heat dissipation design of the whole machine becoming one of the difficulties in research and development, and the heat dissipation problem has gradually become the main quality problem of this type of product. [0003] As a conventional cabinet-type device at present, the main loss components (several air-cooled power units and dry-type transformers) are placed in a cabinet cavity. The performance...

AI Technical Summary

Problems solved by technology

[0006] 1) The air resistance parameters of the whole system are lacking, the actual operating point of the fan cannot be determined, and the operation of the fan is not in a reasonable area, which leads to the easy damage of the fan and affects the reliability of the product;

[0007] 2) The air resistance parameters of the whole system are lacking, the air volume distribution of the power unit and the dry-type transformer is not suitable, and there is a local overheating phenomenon, which affects product reliability;

[0008] 3) After the whole machine has been running for a period of time, local overheating of the whole machine occurs, and it is difficult to troubleshoot and deal with the overheating problem

[0010] 1) The dry-type transformer used in this kind of cabinet products generally has a cross-flow fan at the bottom. In the current simulation technology, it is difficult to approach the actual situation. Often in the simulation analysis, the cross-flow fan at the bottom is ignored, resulting in simulation data It cannot be realistic, but can only be used as a reference analysis;

[0011] 2) The dry-type transformer has a large number of windings, usually with a complex structure, and it is difficult to balance the effectiveness and timeliness of simulation

Because the air inlet path of the whole machine is different, the running status of the fan is different, and the value obtained from the test is not suitable for the actual situation;

[0015] 3) Only testing the air volume does not ensure that the air volume effectively flowing through the dry-type transformer meets the requirements

As a result, under the premise that the total air volume of the system meets the requirements, local over-temperature faults are frequently reported

[0016] The above three methods cannot effectively obtain the parameter of system wind resistance.

This leads to difficulty in model selection, long time consumption, and excessive fan capacity redundancy

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