Thank you for your feedback :) There will be many more videos and courses to follow after our first edX course: www.edx.org/course/electromagnetic-compatibility-essentials
Nice video presentation on conducted emissions. Looking on the emissions, best also to demonstrate the source of noise or the fundamental frequency which produce those harmonics which is actually around 100kHz (SMPS switching frequency). Knowing the fundamentamal frequency, engineers would able to effectively design the differential common-mode filter of its 3dB cut-off frequency and expected Attenuation or emission suppression. Also best to mention correction factors e.g. Transient Limter which has an attenuation of 10dB and LISN of around 0.5dB plus cable loss between the LISN and EMI receiver which you've added into your transducer. Viewer doesn't know that and they might expect the measurement is straight forward. LISN has to be placed on top of ground plane bonded to earth. If the EUT has grounding provision, additional ground braid has to be connected between the EUT and LISN front grounding terminal. I suppose you deliberately removed the missing common-mode filter on the SMPS PCB for demonstration purposes as normally most SMPS already have mains filter. Just subscribed and I found your channel very informative. Cheers, ECErcuit
Thank you for presentation! Real experiments in presentation are always exceptional! Idea for next presentation could be to comment increased resonance around 20MHz as the common monde choke was applied. ;-)
The best video I ever saw about EMI / Conducted emissions. Short, clear and very understandable, Danke
Thank you very much for this nice feedback. Bitte schön :)
The drawing of the important custormer is so hilarious! XD Thanks a lot, I really appreciate all the funny elements in that great course!
We think, that education could and should also be entertaining. :)
0:12 That's amazing; I have the same Fluke meter, over 40 years old, works great!
thank you Tu graz for this course, it helps me a lot to understand te concepts. Experimental parts are amazing.
Thank you for your very kind feedback!
Thank you for your feedback :)
There will be many more videos and courses to follow after our first edX course:
www.edx.org/course/electromagnetic-compatibility-essentials
Nice video presentation on conducted emissions. Looking on the emissions, best also to demonstrate the source of noise or the fundamental frequency which produce those harmonics which is actually around 100kHz (SMPS switching frequency). Knowing the fundamentamal frequency, engineers would able to effectively design the differential common-mode filter of its 3dB cut-off frequency and expected Attenuation or emission suppression. Also best to mention correction factors e.g. Transient Limter which has an attenuation of 10dB and LISN of around 0.5dB plus cable loss between the LISN and EMI receiver which you've added into your transducer. Viewer doesn't know that and they might expect the measurement is straight forward. LISN has to be placed on top of ground plane bonded to earth. If the EUT has grounding provision, additional ground braid has to be connected between the EUT and LISN front grounding terminal. I suppose you deliberately removed the missing common-mode filter on the SMPS PCB for demonstration purposes as normally most SMPS already have mains filter. Just subscribed and I found your channel very informative. Cheers, ECErcuit
Thank you for presentation!
Real experiments in presentation are always exceptional!
Idea for next presentation could be to comment increased resonance around 20MHz as the common monde choke was applied. ;-)
You're welcome :)
Thank you for your suggestion, we will consider that for our next videos.
Thank you very much for your nice feedback :)