[Amps] Choke input filters, design criteria?

[Rob Atkinson]

That's a lot of inductance for a power supply filter choke.  The
current rating for such a choke may be very low.  How much does it
weigh?  a 30H 500 ma reactor should weigh in the neighborhood of 30 to
40 pounds.  A 10H 700 ma power supply filter choke (like what would be
in a 1 KW AM broadcast tx) will weigh in at around 40 lbs, maybe 50.


73

Rob
K5UJ

On Thu, Dec 20, 2012 at 3:41 PM, Chris Wilson <chris at chriswilson.tv> wrote:
>
>
> Well, I checked it at 115V and at 200V  and at 240V, with current
> drawsof 13.08mA, 23.3mA and 28.09mA respectively, giving according to
> the article, and inductance of about 27 to 28 Henry
>
> I also checked it with a calibrated Fluke PM6303A RCL meter, which I
> think tests at 1kHz, and that showed 44 Henry. Assuming the articles
> formula is good up at 1kHz the articles equation would put it at 38
> Henry
>
> I will have to assume the one from the Henry Electronics 3 phase 3kV
> supply is therefore about 27 Henry.
>
> Interesting stuff, thanks Rob :)
>
>