What is Soft switching | Hard Switching Vs Soft switching | ZVS | ZCS

[@TB-jl9fr]

In a nutshell, for ZVS and ZCS you either have a capacitive behavior (phase shift of voltage) or an inductive behavior (phase shift of current) which is especially important for LLC topologies.

[@sandeeppinninti3087]

Really thank you so much I was searching for this from long back....

[@rameshwarshelke4633]

Really thanks u sir ,, Really waiting for next vdo passive and active snubber ckt..🙏

[@FoolishEngineer]

Very soon! keep watching

[@HrachyaGabrielyan-i3i]

Thank you very much․

[@supersilve]

What about a practical example of how and where to measure if ZCS or ZVS is occurring? What parameters do you change (capacitor or inductor value etc) to tune your smps to achieve this? How much does the resonant frequency of the smps must be off from the switching frequency to achieve ZCS or ZCS? After seeing numerous videos no one has explained this yet. Thanks.

[@TB-jl9fr]

For LLC converters you can use first harmonic approximation where you always want to achieve a phase shift of current.

[@supersilve]

@@TB-jl9fr when saying the first harmonic you are referring to the fundamental frequency I guess as the first harmonic does not exist. To achieve ZCS from what I calculated on commercial smps it was found that the smps resonant frequency is about 1/3 higher than the switching frequency If I am correct. Kindly correct me if I am wrong.

[@TB-jl9fr]

@@supersilve No, i'm referring to the approach of first harmonic approximation with LLC : www.infineon.com/dgdl/Infineon-LLC_design_guide_3300W_converter-ApplicationNotes-v01_00-EN.pdf?fileId=8ac78c8c86919021018713adb87d42e2

[@yugalkishor3131]

Can pls explain how we can achieve soft switching in converter using simulink.

[@Simsol487]

by doing phase shift modulation

[@yugalkishor3131]

@@Simsol487 can you pls make a video to explain in matlab simulink

[@Simsol487]

@@yugalkishor3131 which type of circuit you want to simulate? like dc-dc, dc-ac ? to acheive soft switching

[@yugalkishor3131]

@@Simsol487 high gain DC-DC converters...

[@nicoslider]

i have a question : when you talk about "inductance losses", it means "back emf current",right? if yes,does that means that ,an active snubber circuit, is placed there "to recycled it" ,in order do not let it goes back to the dc supply itself then? and so,prevented and protected it of destruction and/or parasites from this back current peak that is produce when the disruption is happening? thanks for your answer ;) ,excellent video ;)

[@TB-jl9fr]

No. Inductance losses consist of eddy current losses in magnetics material but also hysteresis losses for bidirectional currentflow applications like LLC.

[@nicoslider]

@@TB-jl9fr ok thanks , i think i get it, lotta thanks mate, so at least the fact to re use foucault current,rise up the gain to the secondary because no "leak of juice" reflowing into the soft switching circuitry then? am i right?

[@TB-jl9fr]

@@nicosliderTo be honest i didnt understand what you have written. Soft and hard switching is only important for FET components like mosfets. Magnetics losses cant be avoid. You could only change the magnetics material e.g. reduce the core volume or using a more appropriate frequency for switching.

[@nicoslider]

@@TB-jl9fr no problem mate, you gave the answer i expect, we just dont use same words to express the same bottom of this idea ;) thanks for all your answer ;)

[@TB-jl9fr]

@@nicoslider Glad i could help you :)

[@apachecomm]

Thank you very much

[@FoolishEngineer]

Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel

[@sudheerkumar5966]

Very good sir

[@FoolishEngineer]

Thanks and welcome

[@sudhakarkulkarni1730]

Thanks for good information also include design details for same in furthet videos

[@FoolishEngineer]

Sure 👍

[@suyogsawant5045]

Sheldon reference !!😅

[@jacobbassett9350]

I don’t see the difference between zvs and zcs. They look the same. Am I missing something?

[@FoolishEngineer]

Check again, mate!

[@Simsol487]

there is clear difference between zvs and zcs,to switch with zero voltage is called zvc, to switch with zero cureent is called zcs.

[@gregamidon9336]

More appropriate terms would be zero voltage switching (can happen during turn on or off) but a better term would be zero current turn off - i.e. you aren't trying to turn off with current flowing. Look at the waveforms and you may be able to see a clearer difference using these terms

[@bdtp]

What Software you use for this video? Please answer me..... Please please please.

[@FoolishEngineer]

after effects

[@bdtp]

@@FoolishEngineer Many many many many thanks

[@learm67]

🎉🎉❤