Electronics > Beginners

nobody talking about switching PS wasting power on input filter caps?

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Ysjoelfir:

--- Quote from: Ice-Tea on August 23, 2019, 07:56:11 am ---Yoko?

--- End quote ---
No :)

radiolistener:
it costs less, but it doesn't means that it is more efficient from point of view of power consumption  :D

dmills:
But it IS more efficient!
The reactive power flow only causes losses in the distribution cabling (I^2 R), And the power company will correct large aggregate PFC issues) while real power flow is total loss.

The better sort of small switcher these days has a PFC input stage anyway, but as ever that is not itself 100% efficient (NOTHING is), so from a power efficiency perspective PFC on a small DC supply may or may not be a win (From a power quality perspective it is very much a win, mainly for reduced flat topping).

Regards, Dan.

radiolistener:

--- Quote from: dmills on August 23, 2019, 10:48:26 am ---The reactive power flow only causes losses in the distribution cabling (I^2 R), And the power company will correct large aggregate PFC issues) while real power flow is total loss.

--- End quote ---

but you will pay real money for reactive power. So this is expenses for your wallet.  See conversation above...  ;)

james_s:
In the USA residential consumers do not pay for reactive power, I can't speak for elsewhere.

Also as I mentioned earlier, if you have any inductive loads they will cancel out the the capacitive loads.

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