I don't have the answer Bill but there is this to consider:
In the capacitor filter, current only flows about 20% of the cycle. This is
very much not a sine wave and I wonder how rms even applies in this case.
There has to be some terrific harmonics in that waveform!
73,
Gerald K5GW
In a message dated 2/9/2006 9:39:34 A.M. Central Standard Time,
dezrat1242@ispwest.com writes:
ORIGINAL MESSAGE:
At 06:39 AM 2/9/2006, Steve Thompson wrote:
>Allowances for much higher peak current with capacitor input - the high
>peaks result in higher rms current, which is the value you need to use
>when looking at the heating effects.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I wonder if someone could clarify this for me. I've heard this before
but not quite understood it.
My question is, for the same DC output, why is the RMS current in the
transformer higher with one type of filter vs another type? I would
think it would be the same.
73, Bill W6WRT
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