A multi-stage EMI-Filter Pt.2: Effect of the prototype filter with a spectrum-analyzer
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- čas přidán 29. 12. 2015
- Link to Pt.3: • A multi-stage EMI-Filt...
The filter is now available readily assembled in 3 different ratings as well as bare PCBs for self-assembly in our shop:
www.ak-modul-bus.de/stat/strom...
(This is the shop for customers from Europe. For customers from overseas it will be available from February 2018 in our new shop:
www.ak-modul-bus.de/eng)
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Roger & Burkhard investigate the noise from a SMPS (Switch-Mode Power-Supply) with a spectrum-analyser.
In the second half the effect of a prototype of a multi-stage EMI/RFI-filter for noise-suppression is impressively demonstrated.
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good video
the lightbulb "load" used is very inductive, causing a lot of noise too. i made a SMPS(boost) with a lightbulb as inductor
Thank You very much for this video!
It would have been nice if you had shown the schematics of the EMI filters. I guess you will show them later, but it would have been good to see them before viewing the noise spectrum...
It´s shown and discussed in the other parts of this video series.
thx alot for your effort
Hey Rodger,
You might want to go through this series on EMI filters and check that you have links to all parts in the descriptions of each upload. I didn't see a link to part 2 after watching part 1. Maybe I just missed it.
I've been researching EMI filters today. I'm getting ready to design, etch, and build my first prototype. I clicked on your part 1 upload from the suggested content below an upload I watched from Sam Ben-Yaakov.
Originally I searched for "ac line filter" on CZcams mobile. I went back through the search results and your upload of part 1 was the 33rd listing in my results for that search. I would have watched your upload sooner if I had seen the listing. Your pt. 1 upload was the 6th and this is the 7th upload I've watched on this subject this session.
If you decide to add links as suggested, you might benefit from adding the keyword tag "ac line filter" too :-)
By the way, do you know of any cheap options to search for when looking for an older second hand spectrum analyzer? I want to learn about power supply design by doing more experiments like what you demonstrated here. I know this is a subjective question and I need to do my own research. I'm really looking for whatever options that schools may have used in the past or what workhorse models can be found cheaply for less than a couple hundred bucks.
For example, a year ago I asked around about 5.5 digit multimeters and someone suggested an old Keithley 197. That was a super helpful hint that sent me in the right direction. The Keithley 197 is the ugliest DMM on the planet, but it works, and it was cheap.
I know we are in slightly different markets as I'm in the States, but you seem like a well rounded guy that might have some helpful insight on the subject.
Regardless, thanks for the uploads.
-Jake
I will cadd the link to Pt.2. But probalby you have found it already with the CZcams search.
Thanks foor the additional tag. I will also add that.
Spectrum analyzer: Ebay-search will give you some results. The old analog spectrum-analyzers appear quite often used even on the German Ebay-site. The US Ebay-site will have ten times more listings. Except for the usual suspects (HP, Tektronix) in Germany the HAMEG (now part of Rohde&Schwarz) spectrum-analyzer was quite popular. ATTEN build a 100% clone of that. HAMEG in fact sued ATTEN for that copy :-)
But consider to save some money and buy a digital one. The Siglent SVA1000X is the killer ATM: www.batronix.com/versand/spektrumanalysator/SVA1000X.html
It is 10x more capable than the old analog ones. And don´t buy an old digital spectrum analyzer. You won´t get happy with them.
With the Keithley you made a very good buy. Dave Jones from the EEVBlog just a few days ago made a video about buying a 6.5 digit DMM used on Ebay for 200 $ :-)
Hello! I have a cheap rack mounted power distribution device, that looks like a power conditioner, but inside it's nothing except a switch, an outlets, some led AC line meters and a couple of rack light bulbs with their own bulk power supply / attenuator. It rated at 10A. So I thought to add a simple EMI filter there, but i'm not sure if it will be an effective solution low frequency noise, such as below 200kHz, probably, to use it in audio rack or even for monitoring audio signal. Have a digital devices too. So, my question is: It is possible to make a series of these 10A EMI filtering devices or it will make an interferences between them of such an unwanted phase issues? Or can I solder myself or find an improved 10A filter for that purpose, like calculated right -n order? Thank You!
Hi,
Superd video,as I see that you use a Hameg spectrum analyzer for your measures in this tutorial.
Which model is that?
Best regards
Kostas..
+SeAfasia
I think it´s an ATTEN AT5011 with Tracking Generator (150kHz-1GHz)
Today a RIGOL DSA825-TG would be much better in terms of bang-per-buck.
Cheers Roger/KainkaLabs
+KainkaLabs Germany
Thanks Roger,Rigol DSA825 AT825TG is good tool for my needs also the Atten GA4032 or Siglent SSA3021X are on same level I thing.
Try to choose between them.....
Cheers Kostas
I wish somebody would come out a cheaper spec analyzer for iPad. My RF Explorer is only 2.4ghz and I need a much broader range for work. They are just unwilling to spend the money to get me the tools I need.
How to buy your filter product ?
The filter is now available readily assembled in 3 different ratings as well as bare PCBs for self-assembly in our shop:
www.ak-modul-bus.de/stat/stromversorgung.html
(This is the shop for customers from Europe. For customers from overseas it will be available from February 2018 in our new shop:
www.ak-modul-bus.de/eng)