Temperature field simulation design method for low-voltage distribution cabinet

Abstract

The invention relates to a temperature field simulation design method for a low-voltage distribution cabinet. The temperature field simulation design method for the low-voltage distribution cabinet is technically characterized by comprising the following steps: establishing an equivalent model by adopting three-dimensional software; importing a model file into ICEM-CFD software; establishing an air external field at the periphery of the low-voltage distribution cabinet to form a fluid-solid coupling heat dissipation model, and performing mesh partition by using the ICEM-CFD; importing a mesh file drawn by the ICEM-CFD into Ansys-CFX, and then, performing pre-processing on the model; performing analytical calculation by adopting electromagnetic thermal-fluid coupling. According to the temperature field simulation design method for the low-voltage distribution cabinet, disclosed by the invention, by applying a method of thermal-fluid and electromagnetic coupling analysis, by utilizing the three-dimensional software, the simulation model of the low-voltage distribution cabinet is established, and simulated analysis is performed on the model of the low-voltage distribution cabinet through the software, such as Ansys, APDL, ICEM, CFD and CFX, and therefore the product development cycle is greatly shortened; meanwhile, a complicated testing process is omitted, the success rate of product design is improved, and the efficiency of the product design is improved; the temperature field simulation design method for the low-voltage distribution cabinet has an important significance in optimally designing switching apparatus and ensuring the reliable operation of the switching apparatus.

Description

technical field [0001] The invention belongs to the technical field of low-voltage power distribution cabinets, in particular to a temperature field simulation design method of low-voltage power distribution cabinets. Background technique [0002] When the switching appliances inside the low-voltage power distribution cabinet are working, their steady-state temperature rise will increase significantly due to Joule loss, eddy current loss, hysteresis loss, etc. When the temperature of metal materials and insulating materials used in switching appliances exceeds a certain range, their mechanical strength and insulation strength will decrease significantly. If the operating temperature of the switch is too high, its service life will be reduced or even damaged. [0003] Now the low-voltage power distribution cabinet heating is a very serious problem. How to effectively increase the heat dissipation capacity of the low-voltage power distribution cabinet is very important. The c...

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Problems solved by technology

[0003] Now the low-voltage power distribution cabinet heating is a very serious problem. How to effectively increase the heat dissipation capacity of the low-voltage power distribution cabinet is very important. The common method is to optimize the design of the ventilation opening of the switch cabinet. The main method is to continuously modify the size of the vents through repeated tests to meet the design requirements. However, the test method has a long product development cycle and high R&D costs, which seriously affects the R&D speed of low-voltage power distribution cabinets.

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