29 Oct '11, 2am

Military’s demands for functionality in severe environments drive innovative thermal management solutions #thermal

Military’s demands for functionality in severe environments drive innovative thermal management solutions #thermal

Relying on convection cooling inside a system has its limits as heat is dissipated rather slowly (high thermal resistance) to the surface of the chassis where it can be dissipated into the atmosphere. However, advancements in conduction cooling have had a tremendous impact on rugged system design. For example, custom-designed clamshell heat sinks can be fitted to encapsulate each printed circuit card assembly, using wedge locks or direct mechanical interfaces as the contact point with the card stack to dissipate heat more quickly (lower thermal resistance) to the chassis. The clamshells, which essentially work as heat spreaders, and the thermally conductive gap pad significantly reduce thermal issues. Heat spreaders are also being designed to accommodate a number of thermal options, such as top-mounted heat sinks, fan heat sinks and heat pipes to effectively cool microproc...

Full article: http://powerelectronics.com/thermal_management/thermal_ma...

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