Useless video. Could do better by measuring loops for various converters such as PFC, DC-DC etc
@OMICRONLabTutorialsКүн бұрын
We are sorry if this video does not match all expectations. We think a little fun can also be useful. 🙏
@BrentLeVasseurКүн бұрын
What would be the best shielding to protect circuitry in close proximity to a high voltage Tesla coil? Copper or Aluminum?
@OMICRONLabTutorialsКүн бұрын
Please get in contact with the presenter directly. Thanks!
@NoaddictQ2 күн бұрын
What if the input impedance is really close to 50ohm? Let's assume 150ohm. What's the other measuring technique that does not use the bode output voltage? 01:26 to 02:25
@OMICRONLabTutorials2 күн бұрын
Dear @NoaddictQ, please be aware that the video as well as the SW used in this video is really old. Therefore, please check out this newer application note: www.omicron-lab.com/applications/detail/news/audio-system-measurements as well as the appnote on impedance measurement methods: www.omicron-lab.com/applications/detail/news/impedance-measurements-using-the-bode-100. If you have any further questions, please contact us here: www.omicron-lab.com/contact/support
@paulpaulzadeh61723 күн бұрын
Confusing name for product. It is marketing department vs R&D projekt name. It is classic conflict, we have the same problems in our company. 😂😂😂😂
@florianhf3 күн бұрын
😄
@theminertom115517 күн бұрын
Excellent tutorial.
@audioteslacoils7 күн бұрын
Is it OK to use an electrolytic in an EMI filter as an X-capacitor?
@OMICRONLabTutorials7 күн бұрын
Normally, an X-capacitor is a safety certified capacitor that can withstand over-voltages coming from the line.
@LaboussoleNano23 күн бұрын
thanks for this video, I am modelling PCB parasitic too (ADS PEPRO), for validation I have quite the same(results) but damping of the ringing (attenuation), How can I correct that? Best regards
@OMICRONLabTutorials22 күн бұрын
This is a very detailed question. Can you please contact the presenter directly? Thanks!
@LaboussoleNano22 күн бұрын
@@OMICRONLabTutorials thanks, i'll reach him
@CADElectronicsTHАй бұрын
Thank you.
@SamCPowerАй бұрын
Common Mode currents will see both inductors, so why not short out the two inputs and the two outputs?
@OMICRONLabTutorialsАй бұрын
Your proposal is also possible and should give similar results.
@abtinstАй бұрын
The described solution is based on the idea of conducting the filtered noise to protective earth, and getting rid of it. But in Class II devices, where you don’t have any protective earth to conduct the noise to it, how we filter the noise?
@farisikhmal4868Ай бұрын
how about magnetic field on shorted traces ?
@OMICRONLabTutorialsАй бұрын
Can you please be more specific on your question and send it to [email protected]? Thanks!
@farisikhmal4868Ай бұрын
@@OMICRONLabTutorials I want to know what happens to the magnetic flux when there is a short between power rail and ground especially on multilayer board. Is the magnetic field cancelled out or somehow concentrated and disturbed resulting in stronger field?
@OMICRONLabTutorialsАй бұрын
@@farisikhmal4868 generally a short will cause a high current and a high current can cause a high magnetic field. If this field disturbs something else will depend on the situation.
@ats89117Ай бұрын
At 33:31 Loop 1 is drawn going from the cathode to the anode of the diode. This would occur during reverse recovery, but only for a short period of time. Was this loop meant to include the inductor and output capacitor?
@OMICRONLabTutorialsАй бұрын
Dear @ats89117, we just talked to Dr. Ali Shirsavar, and that was his response to your question: "Loop1 is drawn for when the current is conducting through the switch, i.e., when the switch is turned on. Loop2 is drawn for when the current is conducting through the diode, i.e., during switch turn-off. From a layout perspective, we are just trying to identify which loops have high di/dt at "some point" during the switching cycle. Apologies for the ambiguity!"
@ats89117Ай бұрын
Very good presentation, but we probably didn't need to know that you hadn't worn a shirt since last March!
@hassankhanbabaie2209Ай бұрын
Hi, I'm gonna use the device to measure the common mode impedance of a motor. Which configuration is suitable and which connector type should I use?
@OMICRONLabTutorialsАй бұрын
Dear @hassankhanbabaie2209, thanks a lot for your question! Please use this contact form (www.omicron-lab.com/contact/support) to send us the schematics of your DUT and some more information.
13:15 Is the additional +180 of phase on in the Analyzer Suite true for only the loop gain measurement? In other words, if I switch the probes around to measure the compensator as in 43:60, will its phase also be shown with an additional 180 degrees of phase? Based on actual measurements with my Bode 100, i'm seeing a low-freq phase of a Type-II OTA compensator as around +90 degree. But in a spice simulation it starts out at -90 degree. Just wanting to make sure I'm interpreting this correctly. This is a super-informative video by the way. Thank you Florian.
@OMICRONLabTutorials2 ай бұрын
The "additional 180° phase shift" is actually not "additional" but it is there in the real physical system whereas it is not there in a theoretical open-loop analysis of a negative feedbacks system. Bode 100 will always measure the real physical system. In case of an inverting error amplifier with integral part, there is a -180° phase shift from the inverting configuration and a -90° phase shift from the integrator part. In total this is -270° which equals +90° phase. Did you use an inverting configuration in your spice simulation?
@zktec12 ай бұрын
@@OMICRONLabTutorials You are exactly right. I went back to my simulation and sure enough did not have it configured to inverting. Even in my own derivation of the compensator I didn't propagate negative sign through. Now everything is reading +90 on the compensator's phase at low-freq. Thank you Florian for point this out.
@jean-pierrebrasile12422 ай бұрын
🎯 Key Takeaways for quick navigation: 00:04 *🎓 Introduction et Contexte* - Présentation de Christophe et de son parcours professionnel, - Introduction au sujet des convertisseurs LLC. 00:42 *🔧 Fonctionnement de Base du Convertisseur LLC* - Explication des principes de commutation et de l'impact des parasitismes, - Définition de la zone de fonctionnement sûr (SOA) et de ses implications, - Importance des réseaux de suppression pour réduire les pertes de commutation. 06:00 *🔄 Principe de Fonctionnement des Convertisseurs LLC* - Description des éléments résonants : condensateur série, inductance de magnétisation et inductance de fuite, - Avantages de la topologie de commutation douce pour les applications à haute fréquence. 10:11 *⚡ Contrôle du Flux de Puissance* - Importance de la symétrie du rapport cyclique 50% pour assurer une commutation correcte, - Utilisation du temps mort pour éviter les courts-circuits transitoires et assurer la commutation à tension nulle (ZVS), - Impact de la fréquence de commutation sur les caractéristiques de transfert du convertisseur. 14:00 *🔍 Analyse des Impédances et Contrôle en Fréquence* - Étude des différentes régions d'impédance capacitive et inductive, - Importance de la fréquence de résonance pour le fonctionnement efficace du convertisseur LLC, - Explication des modes de commutation et de la gestion des courants de magnétisation. 17:08 *📊 Caractérisation et Simulation* - Utilisation de modèles de simulation pour prédire les performances du convertisseur, - Importance de la simulation des transistors et de l'adaptation des temps morts, - Outils et méthodes pour vérifier et optimiser le fonctionnement du convertisseur en conditions réelles. 22:02 *📈 Régulation de la Sortie du Convertisseur LLC* - Stratégies de régulation de la fréquence de commutation pour moduler la puissance de sortie, - Impact du réseau résonant sur les caractéristiques de transfert DC, - Conception des contrôleurs LLC pour assurer une régulation précise et efficace. 24:29 *🔬 Analyse de la Fonction de Transfert* - Difficultés de dérivation de la fonction de transfert pour les convertisseurs LLC, - Importance des fonctions de transfert de contrôle à sortie pour l'analyse de la stabilité, - Méthodes avancées pour comprendre et modéliser la réponse du convertisseur aux stimuli de contrôle. 25:44 *📉 Fonction de Transfert et Simulation* - Analyse des fonctions de transfert des convertisseurs LLC, - Importance des simulations pour comprendre les réponses en petite et grande signalisation, - Utilisation de Simplis pour extraire les réponses AC en petits signaux. 27:32 *⚙️ Conception et Modélisation* - Importance de la caractérisation du point de polarisation pour des résultats précis, - Simulation des courbes de réponse et ajustement des marges de phase et de gain, - Analyse des tolérances des composants et de leur impact sur la stabilité. 32:19 *🔄 Techniques de Contrôle Indirect* - Présentation de la technique de contrôle par charge pour les convertisseurs LLC, - Avantages de la réponse de premier ordre pour la stabilité de la régulation, - Modélisation simplifiée et analyse des marges de phase avec des techniques de contrôle indirect. 37:57 *💡 Contrôle par Phase et Impulsion* - Introduction au contrôle par phase et par impulsion pour la régulation des convertisseurs LLC, - Méthodes pour ajuster la durée des impulsions et contrôler indirectement la fréquence de commutation, - Utilisation des transformateurs de courant pour la gestion des surintensités et la robustesse du convertisseur. 51:44 *🔄 Contrôle par Déphasage* - Introduction au contrôle par déphasage pour les convertisseurs LLC, - Principe de fonctionnement : observation des courants résonants et modulation du cycle d'oscillateur, - Impact sur la commutation à tension nulle et la régulation du flux de puissance. 53:10 *🏠 Implémentation du TSC (Contrôle par Déphasage)* - Implémentation du contrôle par déphasage dans un package autonome de 20 broches, - Caractéristiques : tension de fonctionnement jusqu'à 800 volts, diodes bootstrap intégrées, - Modèle de modulation Simplis pour vérifier le comportement du modulateur et la réponse en fréquence. 55:03 *⚡ Comparaison des Techniques de Contrôle* - Comparaison entre les techniques de contrôle par fréquence directe et par déphasage, - Avantages du contrôle par déphasage : meilleures marges de stabilité, réponse en fréquence améliorée, - Application typique : convertisseurs PFC et LLC pour des applications de 100 watts. Made with HARPA AI
@lupingliu74982 ай бұрын
Hi Christophe: In 20:20, 'The Process of Finding the Right Point', right chart, why the two current curve have a suddend change after the POP start? In my understand , the POP is try to find the correct operation point, include the operate current , if have such sudden change ,is it means the current before POP is not correct ?
@OMICRONLabTutorials2 ай бұрын
For such a specific question, can you please get in contact with Christophe directly? Thanks!
@ankitpratihasta15562 ай бұрын
Sir, please could you explain how to measure the loop gain if we use the hall sensors for the voltage measurement?
@OMICRONLabTutorials2 ай бұрын
The principles explained in this video apply to any control loop / feedback where the information flows in form of a voltage. Please contact [email protected] for specific questions.
@brendanlynskey9693 ай бұрын
Great video. Around 21 minutes in, you mention a video in which you discuss how to handle too much ramp in the controller. Could you provide a link or the title of the video? Thanks in advance.
@OMICRONLabTutorials3 ай бұрын
Not sure but maybe Dr. Ali Shirsavar was refering to a video that is not yet released. There are a couple of videos coming on his channel "Biricha Digital".
@mohammadrezaadib89993 ай бұрын
best snubber explanation! thanks. What if the flyback has multiple isolated output? what would be the N?
@OMICRONLabTutorials3 ай бұрын
Thats a good question. We will check if we can find an answer. You could also measure the voltage on the switch directly since N is just used to calculate it from the reflected secondary.
@javan10153 ай бұрын
Thank you for the very interesting video. I didnt know about thie reactance paper. Can it be used as well in the case of a double stage filter?
@OMICRONLabTutorials3 ай бұрын
The principles should be the same, so it should be usable.
@ramagirikuna15863 ай бұрын
Hi sir, would you clarify me that how you have considered the value 2.5 to 5 in C clamp calculation,is any reference for that ???
@OMICRONLabTutorials3 ай бұрын
In the video, the reference points to Basso's book: Switch-Mode Power Supplies Spice Simulations and Practical Designs". Please check there. Thanks!
@ramagirikuna15863 ай бұрын
@@OMICRONLabTutorials Thank you so much sir..
@ramagirikuna15863 ай бұрын
Hi sir,how to select the primary diode rating for RCD Snubber design..
@OMICRONLabTutorials3 ай бұрын
Please contact Biricha directly for this question.
@CHkorkskruv3 ай бұрын
Thank you, Florian, for a very interesting video! I have a couple of questions. - At 9.20 you show two impedance plots. Is the blue one only a dream, or would it be realisable? How does it decrease the impedance seen by the load at the high frequency peak? - An interesting demo would be to use the Bode/Picotest combination on some real, third (or fourth) party PCBs to demonstrate the difference between a good and a poor PDN. - The formula introduced at 13.30 might need more explanation. - Would it be possible to make a (very delicate and expensive :) ) Kelvin-type probe with four needles, two for the excitation (current), and two for differential measurement of the voltage difference across the point of interest, e.g. a capacitor? The differential measurement would use both the input channels of the Bode. All three coax shields could by connected at the probe, so ground currents would still flow in the measurement cables, but as the difference is measured, this would not matter. Well, I am sure you tried this already :) - At 43:30 the impressive noise floor of the Bode 500 is shown. It is not clear to me how the voltage across the short is measured, with channel 1? - How important is it at higher frequencies, > 1 MHz, to have the PCB under test powered on? Looking forward to the next video from you, C
@OMICRONLabTutorials3 ай бұрын
Hi! The blue curve at 9:20 is a simulation done by Picotest. It follows the "flat impedance approach". Steve Sandler is doing trainings on how to achieve this. I think the blue resonance peak is lowered by removing the low-impedance valleys. Thanks for the hint to the explanation of the 2-port shunt-thru formula. Regarding the noise-floor, the CH1 is not connected, the receiver 1 is routed internally to the signal source as a reference signal like in the S21 measurement. Powering on the pcb is important to see the dc-bias loss of ceramic capacitors when they are charged. For a more detailed discussion, please contact us via [email protected].
@paulpaulzadeh61723 ай бұрын
Just wonder if the filter character would change if you run DC supply through it , i mean, it shouldn't be biased with DC supply 12 volt , 10A to see how impedance would change . Maybe your inductance would be saturated with 10A.
@OMICRONLabTutorials3 ай бұрын
Dear Paul, can you please get in contact with Günther directly? We don't know the technical details of his work.
@paulpaulzadeh61723 ай бұрын
Nice , very good sound too, good big ppt too. How did you choose value , is it from Dr.Ali shasvari video?
@OMICRONLabTutorials3 ай бұрын
Dear Paul, can you please get in contact with Günther directly? We don't know the technical details of his work.
@inductr3 ай бұрын
Haha did not expect that from the always sober lab so very clever 😅 can we buy the old units now!
@f.vazquez92593 ай бұрын
LoL didnt about Dr's skills as a comedian! I hope his review is out soon
@gerdschneider60983 ай бұрын
This is what the proud owner of a "Bode 100" writes: Really funny and well done!
@Janamejaya.Channegowda3 ай бұрын
Thank you for sharing.
@michaelchang32343 ай бұрын
Oops! Anyway are you going to release any records for the recent design symposium? I'm looking forward to it. I'd missed it.
@OMICRONLabTutorials3 ай бұрын
Yes, the recordings should be online within the next few days.
@michaelchang32343 ай бұрын
Thanks!
@biswajit6813 ай бұрын
@@OMICRONLabTutorials when you are going to make online,it's already been 10 days
@OMICRONLabTutorials3 ай бұрын
@@biswajit681 They are live now: kzfaq.info/get/bejne/hKxnfNBhyOC8n5s.htmlfeature=shared
@biswajit6813 ай бұрын
@@OMICRONLabTutorials Many Thanks!!
@MAYDAYDEEJAY3 ай бұрын
No Dr. Ali was harmed 😅 I'm exited to this unit in action 😮
@biswajit6813 ай бұрын
When you are going to upload this year videos?
@OMICRONLabTutorials3 ай бұрын
As soon as we have prepared the recordings. It can take some days.
@biswajit6813 ай бұрын
@@OMICRONLabTutorials Thanks for the response... please keep priority of Dr. Ali Shrishabar and Basso video
@esmfamil39293 ай бұрын
nice , دمت گرم هموطن
@esmfamil39293 ай бұрын
thanks for your nice explanation
@koWang-lb7hd4 ай бұрын
can you help educate why there is no mirror of diode current on the return path? because it goes into inductor and change to inductor ripple current and mirrored to GND instead?
@maksymkloka78194 ай бұрын
Great video. Good refresher.
@lordfabri4 ай бұрын
This is one of the best videos explaining with simplicity current loops! Great and thank you for sharing.
@OMICRONLabTutorials4 ай бұрын
Thanks! We will share your feedback with Dr. Ali.
@orientaldagger69205 ай бұрын
Do you have a video on choosing injection point of multiple feedback systems like an opamp with multiple feedback?
@OMICRONLabTutorials5 ай бұрын
Unfortunately not. As far as we know, in a multi-loop system all loops should be stable on each own. Best would be measuring each loop on its own if possible.
@JorgeSilva-em8pf5 ай бұрын
Dear Andeas. Which is the Magnitude, Phase, color? Your voice pitch as very low, therefore, sometimes, we can not understand some words. Regards.
@Gengh136 ай бұрын
Good introduction to a subject that is not known by a lot of engineers.
@kagakagazobaza26096 ай бұрын
Is this for robotics?
@OMICRONLabTutorials6 ай бұрын
Mostly for electronics. 🙂
@xfxox6 ай бұрын
Dumb question. Why just not to put a single diode across inductor so the power just dissipated in it? Every single amateur scheme have it😅
@OMICRONLabTutorials6 ай бұрын
The RCD clamp does contain a diode that gets forward biased when the spike gets too high. Note that dissipating also impacts efficiency so the goal is to dissipate only as much as necessary to protect the switch.
@xfxox6 ай бұрын
@@OMICRONLabTutorials thanks, i'm learning, your lectures are very helpful
@user-zb9jn6rl3q7 ай бұрын
Stuart barrie scriven get outlook for Android Geoffrey
@mohamedramdane46028 ай бұрын
THAT WAS BANGING! THANK U SO MUCH
@msaad.20308 ай бұрын
It can be used to test coupled coils used for wireless power transmission? like estimating the mutual coupling or coupling coefficient between the coils?