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@tariqhada4534 Күн бұрын
Great video, At 5:18 how you assumed Zin= 20 Ohm
@OMICRONLabTutorials Күн бұрын
Thanks for the question. The Zin calculation can be seen in this video: kzbin.info/www/bejne/gImlYo2vlLOgi7cfeature=shared
@TomášBielik-o1y 9 күн бұрын
What to do when I have 46nH leakage inductance, and measured fr is 1.88MHz. Calculated capacitor is then 156nF and dissipated power is equal to 48W@250kHz, with Vds=35V
@OMICRONLabTutorials 9 күн бұрын
We suggest getting in contact with www.biricha.com if you need consultancy support.
@mohamedelhammady1924 23 күн бұрын
the output impedance resemble S22 which is =B2/A2 when A1=0. my question here is we need the DC bias for any voltage regulator to measure its output impedance but in this case we are not making A1=0, how can we get around that ? i know that if we have an EMI Input Filter and we want to measure its output impedance, we can short the DC input voltage at one of its side and perform the output impedance as done here. I find this makes more sense with the definition of S-parameters. why is it different then to VRM ? Thanks
@OMICRONLabTutorials 22 күн бұрын
The easiest way to measure output impedance is when the system is actively running so no external bias needs to be applied. Please check out: kzbin.info/www/bejne/pKexpYStpJZqhpY
@ndidikenneth5135 28 күн бұрын
Hello! Pls could you reupload the spreadsheet . I cant find it
@OMICRONLabTutorials 27 күн бұрын
Check out biricha.com/tools-and-downloads/snubber-design/
@virendrapratapsingh3113 28 күн бұрын
how to change the crossover frequency in buck converter ,, what is the effect of crossover frequency if i increases the output cap
@OMICRONLabTutorials 28 күн бұрын
Changing the output capacitor, will have an impact on the transfer function of the power stage. The crossover frequency is determined by the combination of the power stage and the compensator transfer function. Therefore, crossover frequency can be changed by modifying the power stage and / or the compensator.
@narotica1 Ай бұрын
is it possible to shield static magnetic fields? and if so would they require similar materials to the low frequency magnetic fields or would ferrous material be good ?
@OMICRONLabTutorials 29 күн бұрын
Static and low-frequency magnetic fields are similar. A material with high magnetic permeability can be used to shield such a magnetic field.
@EmmanuelChris-w1w Ай бұрын
Hello. I've been working on an asynchronous buck with 120 v input and 24v output. I'm using an Arduino uno for the pwm switching,I keep having my 20x4 lcd becoming distorted the display signal is corrupted this usually happens after a while during charging only. How do I solve this issue?
@OMICRONLabTutorials 29 күн бұрын
Please get in contact with www.biricha.com directly if you are looking for design consulting services.
@r_be 2 ай бұрын
That was genuinely funny!
@robr8554 2 ай бұрын
Fantastic video
@embeddedsociety785 2 ай бұрын
Thanks sooo much ❤
@rolandoaguilera3114 3 ай бұрын
what is the difference between S parameters and Voltage Transfer Function? I know s parameters are based on 50-50ohm systems. Does the transfer function yield the same result on 50-50ohm system?
@OMICRONLabTutorials 3 ай бұрын
The difference is the defined impedance. A voltage transfer function just compares input and output voltages, but it does not define the source impedance or terminating impedance. Some systems change their voltage transfer function depending on the source impedance or termination impedance. For S-parameters the impedances are defined.
@singlefather01 3 ай бұрын
Injecting more powerful signal may trip the ovp. I adjust the inection signal as needed. Normally I will not go over 1mWatt
@disasterprepper 3 ай бұрын
Excellent information, thank you.
@adamkaminski8466 3 ай бұрын
Hello, Do you have a video about "Shunt-Through" method ?
@OMICRONLabTutorials 3 ай бұрын
Hello @adamkaminski8466, please have a look at that video (kzbin.info/www/bejne/imOyopitfrp_aa8feature=shared) or this application note (www.omicron-lab.com/applications/detail/news/impedance-measurements-using-the-bode-100) to get more information about the Bode 100 impedance measurement methods, especially the Shunt-Thru method. If you have any further questions, please feel free to contact us via the support form on our webpage: www.omicron-lab.com/contact/support
@j.vijaymahesh1004 3 ай бұрын
Can you suggest me best snubber design VALUES for Lleak = 180nH , Primary inductance with 0.9uH and secondary with 57uH in 1:8 turns ratio with Voltage spike of 242V at Vds whereas my Mosfet is can handle upto 200V my Vin_max is 9V and my Vout expected is 120V at Secondary Side with switching frequency of 1.5MHz and 12A Primary Peak current , Primary Current Mean =3A.I have designed it by 2nF and 40ohm snubber,my peak has been reduced but the power dissipation is too high than expected ..I need power dissipation less than 500mW at snubber.Can you help me with optimal Values
@OMICRONLabTutorials 3 ай бұрын
Please get in contact with Biricha directly via www.biricha.com. They also offer consulting service and might be able to help you out.
@Sci-Co555 3 ай бұрын
Please write me the name of the lab and name of the material used plssssss
@OMICRONLabTutorials 3 ай бұрын
Can you please be more specific?
@Sci-Co555 3 ай бұрын
@@OMICRONLabTutorials what matterial did you use the kitetic magnetic something in the video
@OMICRONLabTutorials 3 ай бұрын
@@Sci-Co555 Please get in contact with Arturo directly. He has done the experiments and knows the details about the material. His contact e-mail is in the presentation. Thanks!
@f.vazquez9259 3 ай бұрын
@@Sci-Co555Co-netic sheet or foil, from Magnetic Shield Corporation.
@scottdurant8599 4 ай бұрын
what Rheostat are you using?
@OMICRONLabTutorials 4 ай бұрын
Hi, we are using a Contrex rheostat.
@samtabaja3484 4 ай бұрын
Hi Dr, Thanks for those awesome lectures. I wanted to ask you, lets say we want to have separate differential mode inductors, what is the equation/requirements that I can use to determine the required inductance of the common mode choke and what about its rating? should it be rated at line current? what about the rating of the other components in the system? (like L1 C1 Rd etc) what should their current rating be? Thanks!
@OMICRONLabTutorials 4 ай бұрын
Dear Samtabaja, these are very detailed questions and we suggest you contact Dr. Ali directly via www.biricha.com
@TakKanda 4 ай бұрын
For the shut, you guys did the thru calibration. What if I would like to do all three, open, short and load? Do you sell the cal kit or do I have to make my own. Then what is the impedance of the load? Is it 100 Ohm or 50 Ohm?
@OMICRONLabTutorials 4 ай бұрын
Dear TakKanda, For the shunt-thru measurement, you can do a THRU or an open/short/load (OSL) calibration. The setup for the calibration should be similar to the measurement setup of the DUT. You have to make your own setup and calibration kit or you could use e.g. the Picotest DTBK01 Decoupling Test Board Kit. The default impedance for the load calibration for shunt-thru is 50 Ω but can be set to whatever you like.
@queensleaze1385 4 ай бұрын
Was there ever a similar video where he talked about switching node dv/dt and their implication in layout? Somebody please point me to it. I was watching the Power Electronics course of MIT and they mentioned about it; however, the way the professor explained it wasn't enough, or at least made simple to understand enough, for me to wrap my head around it.
@OMICRONLabTutorials 4 ай бұрын
Sorry, we are not aware of a video where Dr. Ali focuses on dv/dt impact.
@sajibkarmaker5244 4 ай бұрын
thankyou dr. ali
@UnbornWarrior123 4 ай бұрын
Jaw dropping moment, seriously...
@UnbornWarrior123 4 ай бұрын
What the hell... Complete surprise by the way, for a person genuinely intends to learn about new Bode 500 (or 450)???
@billimew7496 4 ай бұрын
can we get the pdf he created.
@OMICRONLabTutorials 4 ай бұрын
You can download the presentation here: www.omicron-lab.com/training-events/detail/news/13th-power-analysis-design-symposium-2024-virtual
@emen1371 5 ай бұрын
Thank you Dr. Shirsavar for such a great webinar. It helped me a lot.
@lohikarhu734 5 ай бұрын
So ein typischer Österreicher! Oder, besser gesagt, Wiener... Ok, a bit of joking...but, if you took this seriously, you might get a rather "interesting" view of Omicron! Viel Spaß, folks, formerly Tek, Agilent, Nokia, R&S guy
@OMICRONLabTutorials 5 ай бұрын
Might be a bit of a mixture between Austrian and British humor. 😉
@PSPS437 5 ай бұрын
Useless video. Could do better by measuring loops for various converters such as PFC, DC-DC etc
@OMICRONLabTutorials 5 ай бұрын
We are sorry if this video does not match all expectations. We think a little fun can also be useful. 🙏
@BrentLeVasseur 5 ай бұрын
What would be the best shielding to protect circuitry in close proximity to a high voltage Tesla coil? Copper or Aluminum?
@OMICRONLabTutorials 5 ай бұрын
Please get in contact with the presenter directly. Thanks!
@NoaddictQ 5 ай 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
@OMICRONLabTutorials 5 ай 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
@paulpaulzadeh6172 5 ай 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. 😂😂😂😂
@florianhf 5 ай бұрын
😄
@UnbornWarrior123 4 ай бұрын
Now you got a right nail to hammer on, if you are in marketing team...
@theminertom11551 5 ай бұрын
Excellent tutorial.
@audioteslacoils 5 ай бұрын
Is it OK to use an electrolytic in an EMI filter as an X-capacitor?
@OMICRONLabTutorials 5 ай бұрын
Normally, an X-capacitor is a safety certified capacitor that can withstand over-voltages coming from the line.
@LaboussoleNano 6 ай 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
@OMICRONLabTutorials 6 ай бұрын
This is a very detailed question. Can you please contact the presenter directly? Thanks!
@LaboussoleNano 6 ай бұрын
@@OMICRONLabTutorials thanks, i'll reach him
@CADElectronicsTH 6 ай бұрын
Thank you.
@SamCPower 6 ай бұрын
Common Mode currents will see both inductors, so why not short out the two inputs and the two outputs?
@OMICRONLabTutorials 6 ай бұрын
Your proposal is also possible and should give similar results.
@abtinst 6 ай 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?
@farisikhmal4868 6 ай бұрын
how about magnetic field on shorted traces ?
@OMICRONLabTutorials 6 ай бұрын
Can you please be more specific on your question and send it to [email protected]? Thanks!
@farisikhmal4868 6 ай 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?
@OMICRONLabTutorials 6 ай 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.
@ats89117 7 ай 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?
@OMICRONLabTutorials 7 ай 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!"
@ats89117 7 ай бұрын
Very good presentation, but we probably didn't need to know that you hadn't worn a shirt since last March!
@hassankhanbabaie2209 7 ай 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?
@OMICRONLabTutorials 7 ай 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.
@kc110380 7 ай бұрын
ceramic cap esl is very high in the model
@doolab-meksoor 7 ай бұрын
Thank you, very useful materials.
@kc110380 7 ай бұрын
thanks for nice video, can you share the slides?
@OMICRONLabTutorials 7 ай бұрын
Please send a message to [email protected].
@zktec1 8 ай бұрын
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.
@OMICRONLabTutorials 8 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?
@zktec1 8 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-pierrebrasile1242 8 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
@lupingliu7498 8 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 ?
@OMICRONLabTutorials 8 ай бұрын
For such a specific question, can you please get in contact with Christophe directly? Thanks!
@ankitpratihasta1556 8 ай бұрын
Sir, please could you explain how to measure the loop gain if we use the hall sensors for the voltage measurement?
@OMICRONLabTutorials 8 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.
@brendanlynskey969 8 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.
@OMICRONLabTutorials 8 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".
@mohammadrezaadib8999 8 ай бұрын
best snubber explanation! thanks. What if the flyback has multiple isolated output? what would be the N?
@OMICRONLabTutorials 8 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.
@javan1015 9 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?
@OMICRONLabTutorials 8 ай бұрын
The principles should be the same, so it should be usable.