Apparently correct, but you should as Schaffner whether the component
can be connected like that and still meet its voltage and current
ratings, and whether there are any other matters to take into account.
On 2025-02-01 15:11, [email protected] wrote:
Need a CM choke for high voltage and high currents in the EMI net filter.
This one, https://www.schaffner.com/article/rv8141-50-s03, has 4
windings. Since we are doing only a 1-phase system, we are planning to
use 2 windings pr. phase.
So, when the terminals are like this:
we plan for such a connection to utilize all four windings:
Are the terminals connected correct with the windings in series, so
the complete choke acts as a 1-line CM choke?
Best regards Amund
*Fra:*Ralph McDiarmid
*Sendt:* 30. januar 2025 21:38
*Til:* [email protected]
*Emne:* Re: [PSES] EMI net filter layout
Hi Amund,
You can breadboard the filter as well. No compelling need go
immediately to a PCB only to find you need to change it once or twice
while you converge on a final design. Careful attention to component
lead dress and to a general, tidy physical layout is important above a
few megahertz.
Ralph
*From:*[email protected] <[email protected]>
*Sent:* January 30, 2025 4:56 AM
*To:* [email protected]
*Subject:* [PSES] EMI net filter layout
During troubleshooting in test lab, it is tempting to be quick and
connect filter solutions with soldering and some wires.
Instead, you should probably lay out components on a pcb and get it as
it is described in the books. But in practice, at the test lab, you
can't do that and the question is how messy can such an EMI filter be?
How long can the wires between CM chokes, capacitors be and when you
don't solder but use Wago-connectors for interconnection, is it so
that the filter is almost already destroyed by the impedance that you
have no control over?
As we get up in frequency (conducted emission 150kH-30MHz), messy
design / connection will get more worse when frequency increase, but
we will get trouble anyway in the 150kH-30MHz range. At least from
1MHz. Right?
BR
Amund
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