EMI FILTER DESIGN GUIDE | EMI INPUT FILTER DESIGN | DESIGN GUIDE | ELECTROMAGNETIC INTERFERENCE

[@masterchief4125]

This channel is going to huge Keep up the good work!

[@sanatghosh9278]

It is worth attending, sir. How to calculate common Mode Choke inductance? Please add it.

[@baneknight7402]

Great guide, keep it up

[@RGBEngineering]

Thank you!

[@mohdjabir7163]

I m a big fan of your teaching sir please make a video on how to select NTC and MOV , PTC

[@rafaelgonzalez6158]

Thanks for the video. Unless you are using a PFC on the power stage, there is no way your power factor is 0.96. Power factor is terrible without PFC, I would say in the range of 0.5 and I think I am still being optimistic.

[@AbhishekSingh-qz3fx]

Awesome!

[@omaraaziz6706]

Thank you. Much appreciated.

[@aatmanp]

Hey there, one question regarding the output power being 120W. On what basis did you consider it? Also, is it the output power of the EMI filter alone, or the entire system you are using the filter for? Great video btw! Thanks a lot!!!!!

[@RGBEngineering]

So the output power was just an example I used. The important thing is to make sure your filter can handle the amount of current (both RMS and peak).

[@rahulkumarjkb8442]

While calculating x cap in equ 35VAR = 265 (I) but power Q=VI Sinefi

[@ismail_aydemir_youtube]

about this formule the you think? or a filter with a CY of 2.2 nF (Xgen medical power supplies), an input voltage of 230 V at 50 Hz, and factoring in a tolerance of +/- 20% the expected leakage current can be calculated as: = 2 * 3.14 * 50 * (2.2 x 10-9*1.2) * 230 = 190 µA = The cy you calculated is also excluded from the formula. It includes 10^-9 x 1.2 * volts

[@ismail_aydemir_youtube]

Can we provide the leakage current amount from these values?

[@muhammadyakubjony9316]

Please, if you can explain why the design includes X-Cap, Y-Cap and CM Choke twice? And a video about selecting SPDs (MOV, GDT etc.) with calculation process would be appreciated.

[@ChinaFrSe]

I have the same question

[@Telectronics]

Hey this video is brilliant for an engineering student like me who knows a lot theory but not always how to jump into the real design. I have a suggestion from my side but I think it will also help others If you can give a guide over what core material is the best for my filtering application because you can choose so many even ferrite ones. With my I don´t mean my application I mean more like you choose an arbitratry frequency and say something about it. So like other than saturation can you overheat your core with a too high filtering frequency as example ?!

[@RGBEngineering]

Thank you so much! I will make more videos on this topic, and be sure to include information on ferrite cores.

[@Telectronics]

Thank you very much ! I just found your channel and I already subscribed because you have a lot of good videos as I see ! Keep it going :)

[@sajjadkarami872]

nice

[@davidbalderrrama]

Bro THANK YOU

[@EugeniaSuarez-u2q]

Guess the product hasn't a safety ground and the input voltage is a DC voltage instead of AC voltage. Does the EMI filter be like this? will keep it all the elements? in other words, common mode filters would be needed?

[@RGBEngineering]

This is a great question! Without a safety ground, differential-mode noise would be more of a concern, so the filter you design would focus on that type of noise.

[@EugeniaSuarez-u2q]

@@RGBEngineering this is the answer I was looking for. I've heard and I read something like total common currents = 0. But I was worried about non ideal cases: parasitic L and C between the power lines (conductors, wires, etc) and the physical earth, because of proximity of other groundend to earth elements. I have also read very little common currents (about uA) could bring big EMI issues. Despite this, authors with deep background (like you) are saying that common noise usually becames insignificant. I am now more aware. Thanks for your answer.

[@zuhaibchoudhary4635]

In inductor selection where does 2 go?? Why we assumed cap :(

[@ismail_aydemir_youtube]

Excuse me, you mentioned the x capacitor while talking about the x capacitor, but; if the differential mode inductor coils are in the same core, don't they create common mode noise? Isn't this type of noise that we call differential mode the noise field in the separate coils located in the live and neutral lines in separate cores? In other words, isn't the x capacitor located in the common mode field? time 7:25

[@ismail_aydemir_youtube]

I wrote the article but; I think I understood better in a research that the x capacitor is differential mode. Since we are dealing with stray currents for common mode noise prevention in external parasites, y capacitors come into play to discharge these currents, the x capacitor works for differential mode because it is in short circuit mode, that is, the circuit has noise with its own loop, not from outside, we use the x capacitor to dampen this. Correct me if I am wrong

[@ismail_aydemir_youtube]

I must say that I benefited from your information by doing calculations on paper with a pen in my hand in your video. Thank you.

[@RGBEngineering]

thank you very much ;)

[@RGBEngineering]

two inductors that share the same core create common-mode filter or "common mode choke".

[@ismail_aydemir_youtube]

@@RGBEngineering yes. Yes, I understand that a common core is used to reduce noise currents. I think this is an effective method. But simple adapters don't seem to care about these things... I didn't really understand the power factor part either. Can you help me with this?

[@aneesrahman1287]

Where is power fqctor calculating video?

[@RGBEngineering]

kzbin.info/www/bejne/bnrdnqeoqLuUhbs

[@maitreyeepatwardhan6829]

@@RGBEngineering Hi, this video doesn't seem to cover the power factor calculation part, can you share the link of your video which covers it?

[@RusAdriian]

@@RGBEngineering yeap that s not the video

[@RusAdriian]

Man u should liked my comment 3 years ago . I already finished my degree :))

[@howardhiggins9641]

How important is it that the capacitor pairs C6, C11 and then C47, C49 be MATCHED in value ? I have heard that they should be VERY close. I also know that random parts, even in the same batch, can be "off" just to normal variations. So if it is important, how close should they be in percent ? Thanks.

[@RGBEngineering]

Just make sure they are the same nominal value (they need to be able to filter the same noise signals). Tolerances on parts should be taken into account when considering the pass criteria for a product's EMI test. For example, setting a 3db margin would put you several standard deviations within passing, so that might be the margin amount you use. At the end of the day, as long as your product passes EMI, that is all that matters.

[@ismail_aydemir_youtube]

Ileak = CY x V = ? what this leakage current formule ?

[@RGBEngineering]

leakage current would have to do with the equivalent series resistance.

[@stiven_ph8656]

Are emi filter or inductor can reduce noise on audio signal?

[@RGBEngineering]

Yes, it would work for that as well.

[@stiven_ph8656]

@@RGBEngineering but is there any downside?

[@hoofheartedicemelted296]

Does any of your videos include the formula for calculating flyback? Apologies if this is an obvious question.

[@RGBEngineering]

I am planning a whole series on power electronics. I will include some videos on the flyback converter :)

[@hoofheartedicemelted296]

@@RGBEngineering Thank you sir. Is there an option to contribute to your work sir? A patreon?

[@Ramkumar-le4me]

That inductor calculation is for pi filter or common mode choke??

[@RGBEngineering]

Pi filter. I used a graph to select the common mode choke.

[@Omnipotentwarrior]

Sir u got Y cap value 500pF but u add different values in the schematic diagram. can you tell me how come that value added. same in the case of X cap.please explain.

[@RGBEngineering]

Those were the minimum values that I calculated for. I then chose values that were above the minimum required value.

[@Omnipotentwarrior]

@@RGBEngineering Thankyou sir.

[@lintaubuo2019]

​@@RGBEngineeringsir why do you need a 2200pf capacitor when you only calculate 500pf is there any factor that influences

[@dradeelarif1469]

Xc to be 530KR not 5.3mR

[@김동경-i9t]

L = 337uH --> 0.0337uH

[@jboy4real]

Good teaching but you need to make your writing legible

[@mohdjabir7163]

I m a big fan of your teaching sir please make a video on how to select NTC and MOV , PTC