Analysis of a peculiar Flyback converter

[@ats89117]

Thank you for this very interesting video. I did a SPICE model for this interesting variant because I use something similar (without the diode and resistor) as a pulser for piezoceramic transducers. I think if you add a blocking capacitor between the two inductors, you will get some isolation and the output will be grounded when D=0. But as you point out, L1 causes a very high voltage across the transistor. With a perfectly coupled inductor, the voltages are equal and with less than perfect coupling, the voltage across the transistor without a snubber is greater than the voltage across the load. Moving L1 so that the switch grounds the center tap of the coupled inductor results in the voltage across the transistor being only half of the voltage across the load which makes sense since you can think of the coupled inductor as an autotransformer. This is very good for me because high performance, high voltage transistors are expensive components and of course it's much easier to get better performance with a lower voltage transistor.

[@sambenyaakov]

Would you post this in my LinkedIngroup for others to see?Link to LikedIn Group to become a memberwww.linkedin.com/groups/13606756/Link to post www.linkedin.com/feed/update/urn:li:activity:6558309606840389632

[@NiHaoMike64]

Add a diode and capacitor to make the primary side a boost converter, then move the secondary connection so it is in series with the boost converter output. Now you have a "flyboost" converter that uses a regenerative snubber.

[@sambenyaakov]

Would you post this coversation in my LinkedIn group for others to see?Link to LikedIn Group to become a memberwww.linkedin.com/groups/13606756/Link to post www.linkedin.com/feed/update/urn:li:activity:6558309606840389632

[@stevenbliss989]

Interesting idea, I will have to simulate it! :)

[@stevenbliss989]

Not simulated yet, but I expect this will be more efficient that a plain flyback.

[@robson6285]

Haa that is again usefull for all sort of situations. I love these chanses to learn more of the knowledge with deeper insights, especially usefull when you take such a piece of often used circuit.

[@sambenyaakov]

Thanks👍

[@urielalbertodiazreynoso6309]

Thanks. It was very useful for me to discuss these nonstandar converters.

[@sambenyaakov]

Thanks😊

[@evgenykochubey264]

Hi professor, first of all thanks a lot for your lectures here, studying each time something new from this! Question, for this kind of converter can I use coupled inductors like for sepic converters, it means 1:1?

[@sambenyaakov]

Yes, correct. Thanks for note.

[@ivarravi1000]

Thanks for videos like this..Could you explain circuits alongside simulation such as PSIM to better visualize the waveforms.It could be best set of tutorials for PE emthusiasts and researchers.. Thanks

[@sambenyaakov]

look up the videos on Flyback in my KZbin channel

[@MS-ef1gy]

General question not directly related but interested in your reply...if the rate of coil discharge is varied does the total amount of energy discharge vary as well? For example by clamping with a diode the rate of total energy discharge would be less then a sparking discharge...thanks in advance for your thoughts

[@kranthikumarreddy245]

HI sir All your videos are very good. Can u please make one video with all topologies and their applications based on the power ratings. It will be very helpful. Thanks in advance

[@sambenyaakov]

Thanks. Perhaps.

[@nabilalaya2905]

Hello Doctor, Many thanks for this excellent toto 😊, please we need to have a couse about the following subjects : conducted immunity EMC. Radiated immunity EMC. Conducted emission Radiated emission. Burst.....ESD ...etc. many thanks again 😊

[@sambenyaakov]

Good subjects. Will try. See kzbin.info/www/bejne/a3-1mn-Fq9KLmqM

[@nabilalaya2905]

@@sambenyaakov Yes it is a very helpfull, we need this kind of demonstrations, thank you for your valuable support.😊

[@debasismohapatra627]

Sir can you please make a video for dc dc buck converter digital control mechanism

[@sambenyaakov]

Will try.

[@hamidk4772]

EXCELLENT^n

[@sambenyaakov]

😊