View Full Version : can someone explain this to me?
12-04-2011, 12:37 AM
2813where Po, i is the output power of the ith output.
12-04-2011, 01:05 AM
what kind of formula is that?
12-04-2011, 01:54 AM
It's for power efficiency. and the one I need a definition for is
I know this is sigma but what is it used for in this equation? what value gets inserted there?
I've got most of the rest figured out as far as n being the effeciency, Po, i is the output on the i th bus p in is power in. but I can't get a lock on that sigma thing. (think anyone will guess that math isn't my strong point?) and by the way, is this considered algebra? or am I moving into unkown (by me) territories?
12-04-2011, 07:32 AM
That is advanced Algebra I believe. Makes my head hurt looking at it this late. Can't recall the symbol either.
12-04-2011, 07:38 AM
Try that link. Might help you figure it out better than I can atm :P
12-04-2011, 08:58 AM
I guess my mom was right about me needing it one day.... shoulda paid more attention in school. at least now i have a better starting point. I'll look at it again in the morning.:sleep:
In case you need some more help, looks to me like what it says is: Sum all the outputs, divide by the input and multiply by 100.
12-04-2011, 08:42 PM
Great, now I just have to figure out how to get the values for the output. do they make a kill-a-watt for the dc side of a PSU?
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