The Influence of DCDC conversion module Fan Vortex on Heat Dissipation(5)

●The design is simple. Power is available with just one power module, with a few discrete components. ● Shorten the development cycle. The module power supply generally has a variety of input and output options. Users can also repeatedly stack or cross stack to form a building block combined power supply to achieve multiple input and output, which greatly reduces the prototype development time.
●Change is flexible. If the product design needs to be changed, simply convert or parallel another suitable power module.

By comparing the two analysis results, we found that during the analysis of this model, the direction of fan rotation has a particularly large impact on the distribution of the flow field and temperature field inside the DCDC conversion module. In terms of flow field, because the rectifier bridge part of the model is relatively low in size and the PFC radiator part is relatively high, in this case, the rotating direction of the fan has a very significant impact on the flow field. When the fan rotates clockwise, the vortex around the rectifier bridge radiator is small, and the flow field is relatively open, which is conducive to the heat dissipation of the rectifier bridge radiator. However, when the fan rotates counterclockwise, there are many vortices around the rectifier bridge radiator, which is not conducive to the heat dissipation of the rectifier bridge radiator. These differences can also be further proved by the temperature field distribution of the the 110 v input power supply supply section.

Carefully observe the flow field animation of the fan in different rotation directions, we can see that the reason why the fan rotation direction affects the later flow field distribution is that the rotation direction of the fan determines the spiral direction of the spiral flow of the fluid at the fan outlet. Therefore, we should fully exercise this sign in the actual application process, and try to avoid the layout that is not conducive to the heat dissipation of key power components or high loss power components in the DCDC conversion module, so as to ensure the rationality and reliability of the thermal design.