Re: [PSES] Does anyone make this filter?

2019-06-05 Thread Ken Wyatt
Hi Ken, You might look at AstrodyneTDI filters. I see they make DC filters from 3 to 2500 amps. Don’t know about the feedthrough part, but they may have suggestions. My contact there is Ron Hamaoui, VP/GM of the EMI filters business unit. Nice guy. Email (from LinkedIn) ron...@hamaoui.com

[PSES] Does anyone make this filter?

2019-06-05 Thread Ken Javor
Working a little outside my experience area. Trying to help someone meet FCC Class A RE limit. Device is an off-line battery charger, failing RE 30 ­ 200 MHz. Conducted emissions on output leads (24 / 36 Vdc @ up to 25 A) are too high to meet RE limit. Trying to snub sources is not my thing and

Re: [PSES] DC/DC EMI Input Filter Stability

2019-06-05 Thread John Woodgate
Re solve or prevent. In one way they are the same, because the solution is usually the same. But 'prevent' is far cheaper than 'solve'. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk Rayleigh, Essex UK On 2019-06-04 17:52, Grasso, Charles wrote: Ty

Re: [PSES] DC/DC EMI Input Filter Stability

2019-06-05 Thread James Pawson (U3C)
Hi Charles, Mostly preventative. We are trying to achieve a good starting point for further experimentation. All the best James James Pawson EMC Problem Solver Unit 3 Compliance Design for EMC / Pre Compliance / Problem Solving / EMC Testing / Consultancy / Environmental &

Re: [PSES] DC/DC EMI Input Filter Stability

2019-06-05 Thread James Pawson (U3C)
Hi Istvan, Thanks for the links to the papers (I'm certainly not a power supply expert but I'll do my best to digest them) and for your comments. The product in question is a small compute module with limited board space for filters hence the customers request to combine all the filters int