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Hi Tim, great video! Helped me to check and resolve some of the polarities on my end. Just wanted to point out that the equation that you derived for L2 at 1:09:21 is flipped on the first term on the right side of the equation. It should be Vg/2*deltaIl2. Hope that makes sense

19:16 What is the value of n here?

Great explanation. The circulating current on the secondary side of the DAB was explained, what about the circulation current on the primary side of the DAB? A graphical representation of this will be highly regarded

Prof please your reference textbook?

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.

I really appreciate the time you spent for clarifying the DAB design. thank you M. Kim. However, I think that the equation of "tx" at time 43 min it is not correct. Would you please check it or explain how you did you get it. I tried with it and I found: tx= ( I2 - n * Io) * L/ (Vo/n + Vg ). knowing that I2 + I1= [2* D/(4*L*fs) ] * [ Vo/n + Vg ].

I would like to express my great thanks to you for your excellent explanation and analysis. I just have a remark at time 42:35, I think you missed a D, it's D*Vg.

Great learning resource, @Tim McRae 808 videos are hidden and unavailable; could you please make them available, after lecturer 9.2....

Hi Tim ,thanks for such an intuitive lecture, may I know which books/ reference do you follow?

What is D prime?

Thanks for this video clip.

Hi Tim, in this video 12:21, you introduced PCOSS calculation. I have a question that the enegery stored in OSS when high-side FET is turned on, it must be discharged to somewhere else. If this energy is not used by output or the mosfet itself, it must be taken into account as loss as well. Could we use Poss=Coss*V^2*FSW instead of Poss=0.5*Coss*V^2*FSW to calculate the loss? Thank you very much

hi Tim, thanks for the video. However, i think there is a minor mistake in your AC power transfer calculations. I remember that the normal representation in power systems usually takes V<theta = Vcos(wt+theta). Maybe i am wrong..😅

Really, really helpful. Thank you for this.

Great video, please could you post small signal model of dual active bridge converter

THANK YOU

Thanks a lot !

sir solve one electric vehicle question

Thank you so much for this content.

Would this design and its derivations stay the same if the dab is a step up so if Vg<Vo since here Vo>Vg

Can anyone help me out please, I want to make a 20kW bidirectional charger that will take input 600V and output 48V, please help me out with that will DAB is suitable for this kind of design.

is it possible to have two different di/dt during Ton and Toff? A steep input current and a much less steep output current, Ton << Toff for a complete cycle. (for a flyback)

@timmcrae3831 At 6:12 why you took minus theta, according to me it should be plus because V2 leads V1 by theta??

The time you waste "writing" needs to be eliminated. Write it and say simultaneously, otherwise it becomes annoying, watching you spell words. Or have the power point slide pre-printed. This video is not an effective use of my time.

What if your not given the current range? How do I find L?

I loved your video. I am from the occupied Palestine

excellent explanation sir

Brilliant Explanation, whole day I have been trying to get this concept, you cleared this concept like a snap. Thank you so much. Please keep making such videos.

I love your clip

Hello Tim, I don't want to be rude, but I think in your calculation you made a mistake, please correct me if I am misunderstood. Now I try to analyse the coupled Sepic, and obtain a the same formula for delta I ripple in inductors, and a made a simulation. Your formula for delta current ripple on inductor in true for coupled SEPIC, for uncoupled, the ripple is two time bigger. The question is: From where current ripple on coupled sepic is two time less. Thanks for video, and I don't want to hate, I want to understand who, and from where.

if for example I have a unit transformer, what is the relation for output voltage if only input voltage is known?

what ks the relation between input and output voltage in terms of duty ratio? can you teach the same for dual phase shift DAB converter?

Thanks for the video

Doud this is forward

VOR formula is wrong, it is Vo times N

OUTSTANDING EXPLANATION

Hey Tim! Thank you for the video and the theses reference in one of the comments!

Thank you so much for this interesting explanation. I wonder if you can share with us the lecture notes or handouts

Nice explanation Sir

1. Transistors are very different at right and left (high voltage vs high current). Different timings, a complex controller (if exists) etc. 2. A classical sync rect with a dual secondary do the same job without additional heat losses and money 3. Why people still teach "a dual active bridge" if no one uses such architecture in a real life?

please tell the calculation of LL

please tell the price of the hidden videos

Perfectly explained SEPIC converter. Deriving all the equations from zero is absolutely fantastic. Thank you so much for this video.

you're the goat honestly, thank you for making this series

Thank you for the video, sir. Kindly say the reference book or journals for designing DAB converters.

I did get when on resonance switching with LCC a very high Cs voltage of 3 kilovolts and amperage on startup because of output anti ripple capacitor, later dropping when output voltage is nominal value. I can clearly see a resistive action when do this, therefore I do set Fsw 0.7 to 0.85 x Fres amd use chip soft start.

Thank you Tim

thank you very much sir, I started my Reseaech work with your video

This is great stuff, easy to follow.

thank you soo much , thats perfect