offers several methods for cooling IGBT modules - cold plates, extruded aluminum heat sinks, bonded fin heat sinks and fan-cooled modules
. Air cooling is the conventional preference of design engineers due to low system cost and proven reliability and has been used for decades. Many styles of air cooled heat sinks are available to meet a wide variety of needs. Air cooling is most effective for lower power and lower power density semiconductor components and can be a limiting factor in many high density system packages. Bonded fin heat sinks achieve a 2 to 3 times greater surface area than conventional aluminum extrusions. This allows heat removal to be increased at a given temperature rise allowing greater design flexibility in a set heat sink volume. Although slightly more expensive than aluminum extrusions bonded fin parts actually save money due to smaller size and decreased thermal resistance.Extrusions:
Conventional aluminum extrusions are offered in a wide variety of shapes, thermal performances and sizes. Available in thousands of tooled shapes new extrusions are relatively inexpensive and quick to tool. Fin extrusion ratios (fin height to open spacing between fins) do limit the number and height of fins in aluminum extrusion and can limit the area available for heat removal.
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