Who told you that high voltage goes to the primary winding in SMPS transformers xDxDxD With PWM, the effective voltage is reduced because SMPS transformers, unlike power transformers, work current-oriented, not voltage-oriented.
If everything was as you say, then they would use low-voltage transistors, and not take 600 volt transistors to work with a voltage of 310 volts. In pulsed equipment there are always high voltage ripples that easily penetrate anything, even if this pulse is very short in time.
People complaining about AI voiceover. This one sounds alright. Back in the day, they used a narrator. Not much different than the voiceover used here. At least its clear and understandable. Use CC if desired.
Yes, unfortunately I have to use an artificial voice, since my English is terrible and the audience definitely can’t understand anything :))))) Thank you for watching like this.
I did this when I was young, and I enjoyed that I made the voltages for a big transformer, 1.5 v, 3v, 4.5v, and so on. I used a book, that instructed the amunt to turn the coil to achieve the proper voltage. It's a good feeling, when someone is doing things like this, it feels to be very smart, and feels that I have a super power.
D5 can be omitted, its just a reverse voltage protection when used in computer. We can use same diodes as on +12v side. Remove the -12v inductor coil and wound same gauge wire as +12 on the same inductor. No need of winding another one. +5v side needed a load of 10w 1-3ohms wire wound resistor. This setup will increase the performance of the supply.
The bridge rectifier should be capable of handling more than 7A , before continue to next stages. A bridge which made using 1n4007 would never produces greater than 3A.
@@Den_Electro_channel Sir there two things i observed your sprint layout file do not carry the component values and no schematics please include it for more clear view. thanks in antispation
GET A REAL VOICE OVER, I cant listen to a video with theese shitty ass AI TTS voices! What's the matter? Do you not HAVE a voice or something? Are you mute? I don't think so. This kind of video is as bad as those ones where they just have music and no voice-over.
@@mrbinoyghsoh Ikr... Why would it matter ? I think the AI voice sounds decent enough. Sometimes I read ppl complaining about it. Very often they could just turn down the volume, and click on closed captions.
The voltage regulation is done primarily from the +5V line. That is the reason why the voltage output increased when you loaded up the 5V line as it was simply idling with no load and needs either the regulation circuit to be modified or a permanent load applied to the 5V line. The higher the +5V load, the better the regulation becomes on the 12 V lines (there is a practical and sensible limit to this load to do what you want). Without the 5V load, there is limited regulation as the most important voltage to be regulated for a computer is the +5V line - that is why it is given priority for regulation. On some cheap power supplies, there is no regulation on any other line but the 5V line, so something to watch out for.
Can you make a dedicated video on calculating the no.of turns for different types of transformer used in dc-dc,ac-dc converters ? Such as flyback, forward/push pull, h bridge, buck,boost etc. Particularly interested in knowing more about toroidal core transformers, transformer with and without air gap, calculations for different physical parameters of transformers like circular and rectangular core area. I know I'm asking a lot. But thank you in advance. Subscribed for future uploads👍
AI sounds fine, but it makes your videos less personal and less recognizable. It all falls in one big pile of AI voiced and - god forbid - AI-generated content, which is getting more and more annoying and tiring to the viewers. Well, unless you're Neuro-sama or something. So yeah, I won't subscribe, but thanks for the video!
Not well suited for high voltages. Best to begin at one point and pile the wire evenly around the core until you approach the beginning, but do not overlap. If more turns are needed, tape the winding and put on another layer. Even layer winding is not usually successful because of the difference in diameter of the hole and the outside. Use Formvar wire or Polythermeleze wire, which have high strength coatings.
more strength to you keep good work going. I can say u are one of the best i have ever seen on the internet that is doing wonderfully well in explaining power Electronics very very well. Indeed, where u beat others is that u explain with the illustration of showing the turns of ur winding,
And thank you for watching. I think the transformer is the most difficult part, and some bloggers don’t show how to make it well, so I’m trying to do it in more detail so as not to repeat their mistakes.
Excellent tutorial i love this site indeed you can explain the circuit very well. please do you have smps project using UC3845 please share link or do one 15v 5A
Great video Den. Helpful to people like me with lesser academic background. Subscribed happily & will eagerly look for more videos you have created & will create. Will you elaborate more on some details like how OV, overload protection works & other fine points not usually found in text books! Thanks for a great video - to say the least!
@@Den_Electro_channel It definitely is a knock off. It would be more fragile and not produce as much output as a genuine one. It also may be more prone to instability
Yes, of course you can. It is necessary to select transistors with similar characteristics. Current, voltage and gain. You can simply enter in a search engine: Transistor KT805 analogues.... And they will show you what you can put in their place.
