[rescue] Cooling (Long Message, sorry)

Scott Newell newell at cei.net
Tue Apr 16 11:57:03 CDT 2002


>Aua! Dave you disappoint me. 'heat' != U * I You have AC here, 
>SMPSUs with capacitors at the input that cause 'blind load'. 
>'heat' == U * I is only valid if you have pure R, no C or L 
>in the load impedance. 

Yep, but a lot of big and high quality SMPS use power factor correction to
reduce the reactive component.

Can you even get the CE mark on a >100W SMPS without power factor correction?


newell



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