Thanks for comment.

Thanks for comment. I am happy for being of help. Good luck.

Thanks. Good luck with your studies😊

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Thanks for comment.

me too, T^T

Thanks to you and to Google translate.

@@sambenyaakovI did not expect you to read this comment and wrote more for myself). Thank you for this channel!

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😊

Thanks

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Thanks.

In Flyback the clamping is by the secondary, save the spike due to leakage inductor which you need to clamp.

Yes there is an error pointed out 4 years ago😊 JeffH 4 years ago Hi Professor, @14:12 shouldnt n3/n1 be less Doff/Don? Sam Ben-Yaakov 4 years ago Hi Jeff, correct. Indeed, the expression is messed up. It should be as you pointed out. Thank you very much for pointing this out. You have a keen eye.

Hi Jeff, correct. Indeed, the expression is messed up. It should be as you pointed out. Thank you very much for pointing this out. You have a keen eye.

Hi, Forward converters were used in the range of few 100s W. These days, the LLC seems to take over.

@@sambenyaakov that answers my question. Thank you very much.

@@sambenyaakov also I presume two switch forward was used in the 100W design? Or was it some other topology?

Thanks

Thanks for comment: Sam Ben-Yaakov 9 months ago Yes there is an error pointed out 4 years ago😊 JeffH 4 years ago Hi Professor, @14:12 shouldnt n3/n1 be less Doff/Don? Sam Ben-Yaakov 4 years ago Hi Jeff, correct. Indeed, the expression is messed up. It should be as you pointed out. Thank you very much for pointing this out. You have a keen eye.

Thanks for comment Sam Ben-Yaakov 9 months ago Yes there is an error pointed out 4 years ago😊 JeffH 4 years ago Hi Professor, @14:12 shouldnt n3/n1 be less Doff/Don? Sam Ben-Yaakov 4 years ago Hi Jeff, correct. Indeed, the expression is messed up. It should be as you pointed out. Thank you very much for pointing this out. You have a keen eye.

In flyback' energy is stored in core and them discharged into the secondary. In forawrd energy is not supposed to be stored in core, but some does due to magnetization so this has to be discharged by a third winding. or some other means.

Thank for bringing up a good question. Toroids are used in flyback but less often. They tend to have a higher leakage inductance which is increasing losses and spikes. They would be a good choice if one needs very high insulation between primary and secondary because you can put them apart. Using ZVS techniques will reduce the leakage losses.

When the inductor current is interrupted, the voltage tend to swigs toward very high voltage and clamped by Vreset. See kzfaq.info/get/bejne/ftqnnKx6tcvPlqc.html

Strictly speaking the forward transformer does not need a gap. However, I would imagine that in some cases a gap can be helpful. For example: if DC current is expected at the primary or secondary or if the resonant frequency between primary and associated caps is very low.

@@sambenyaakov Thank you, Professor!

Thanks

You mean AC instead of DC at input? No

Thanks

Thanks

Forward is basically an isolated buck. See kzfaq.info/get/bejne/ftqnnKx6tcvPlqc.html

Thanks

? I don't follow.

In CCM, the inductor current does not drop to zero

@@sambenyaakov I see. I thought the point of the reset winding was to make the flux in the core go completely to zero..which dosnt occur in CCM, right? what am i missing?

The current is a reflection of secondary not the magnetization current.

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@@sambenyaakov I could give a good sheet in my exam. Greatings from Turkey :)

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I would consider a series resonant converter.

This is considered to be an ideal transformer which by definition is assumed to have an infinite magnetization inductance.

Dear Professor, now I understand. Thank you!

You can but it would not operate as a forward converter. Just a transformer

Yes, but this is not a "Boost converter"

The third winding helps to recycle the magnetization energy kzfaq.info/get/bejne/hapooKWE2LDKep8.html

@@sambenyaakov ok but why can't we just put a catching diode in a parallel with the primary side.

@@thezodiace7399 this will not the magnetization. Zero n voltage on inductor constant current

No, because of the diode in n2 (the voltage at this instance is of opposite polarity)

Professor, thank you for your answer. Now a question that could be a little bit out of context: following the same procedure shown at 8:45 but in a push-pull, when both transistors are off, why the voltage of the transistor is just Vin? should not it be 2Vin? Thank you for your help.

In push pull, the secondaries are shorted which is reflected to the primary.

No. This will be like a short (a transformer between input and output)

@@sambenyaakov thank you professor

The switching act transfers the DC to AC, like chopping, such that the transformer sees an AC voltage

See kzfaq.info/get/bejne/r7lzYLan1LfFY4k.html

Will try

There is no videos available in youtube that explains the working of Active clamp forward converter.

Well, you seem to be good in persuasions. I was planning to prepare next a video on "multiphase, interleaving and ripple cancellation". You think active clamp has priority?

just found kzfaq.info/get/bejne/i8-UjZV13sW8qHU.html

good quote but its just their product promotion, the explanation that you have given is very eazy to pickup.

Well well well, no thank you for sharing, no intelligent comment, just wailing like a baby. About 43000 people watches this video and only you are complaining. Doesn't it tell you something? Did it ever occurred to you that many of the people watching this video have difficulty understanding English and a lower pace helps them? Or that I myself am not a native English speaker and it takes me time to choose the words? So you slowed down the video, big deal. This is far below fake news, this is idiotic news. Grow up.

@@bismark5809 Thanks

@@bismark5809 👍👍