How to Calculate and Rewind Pulse Transformers 

Homemade 102 kích cở dây tính s bạn

Homemade 102 lỏi biến áp tròn đo tính cung giống vậy lun hak bạn

Yes, I'm glad it was helpful to you.

@@PhdHung ...today rewinding completed, transformer assembled and installed back in its place. Power supply works great. One more thank you!

Please...what is the different between many wires and one wire to rewind a transformer? more power or more heat or more interference?

Thanks for watching

Hi

Thank you

This circuit uses push-pull. So 2 coils will be opposite.

Yes, I will do it. Calculation of transformer gap is very difficult.

I use high temperature + rosin. The insulation will be burnt. 15:30 450*C

Thanks for watching

yess, ok

ok, :D

I use push pull circuit. It needs 2 coils in the opposite direction.

Yes, soon

@@PhdHung sir ic 555 or cd4047 can i 33khz generate frequency? For drive atx transformer Please reply sir

NE555 and 4047 have no deadtime, working at high frequencies is difficult

@@PhdHung sir how to simple generate 33khz frequency i have no pc please provide me a simple circuit diagram.

Any ic like sg3525 or tl494 i need without pcb make it.

I do not count. maybe around ~ 100.

The problem is copper wire, please use yellow copper wire.

I need 380V voltage for the sine inverter.

Can I calculated base on 220 volt

Thanks

Just google awg and you find all measurements.

12 v = 3 turn 380 v = ? 380×3= 1140 1140÷ 12 =95 turn

@Home Electronic 1 No!!!! 12V = 3 turn. 1 volt need 3:12 = 0.25 turn 380Volt x 0.25 = 95 turns

@@PhdHung This is the same as trying this method or this method.

380v ÷ 12v = 31.66 >>>> 31.66 X 3 = 95 Turn

@@PhdHung Instead of selecting the number of revolutions for 1 volt, select for 12 volts. This method is the same for you or me. That's the Proportionality ratio . Ask a math teacher to find out.

Can be used for sine inverters. However, here I use it for an electric fishing.

thank you

There are many on my channel.

Dầu vecni cách điện, bạn mua tiệm đồ điện nhé, nó dùng ngâm biến áp hoặc ngâm motor. Loại này loãng, dễ thấm sâu, lâu khô hơn loại trong (khoảng 1 đêm mới khô)

On average, 1cm2 max about 400W.

If you use it for 12V. Primary 2 turns + 2 turns. secondary 60 turn (350V)

@@PhdHung so friend to work at that frequency of 50,000 or it doesn't matter if at 35,000 thanks 

Use soldering iron at 400 *C. The insulation will burn.

@@PhdHung thanks bro

of course. At 24V. Use 6 + 6 turn - 2mm2

ok, wait me

OK i shall wait for your next video

I have a square wave converter using tl494 and p55nf06.🙏🙏🙏🙏🙏

Yes, all core sizes. But this calculation formula is for push-pull. Cannot be used for H-Bridge or flyback.

@@PhdHung all right i got it thanks for fast answering

It can be found in the datasheet of the core, wait for me. I'll do it .

I am not that experienced but i will try to help. Others can correct if I get something wrong: 1-> you can split the windings however you like. You can have multiple coils on the outputs all connected together. So, it can use all the coil and get full voltage or a part of the coil to get say 1/2 or 1/4 of the voltage. It all depends what you use the transformer for. In his case, he uses 3 inputs for the primary and 2 for the secondary. the primary is 2 coils wound together with a common point in the middle. The reason for this is he is using 2 MOSFETs to generate 2 seperate signals. Since MOSFETs are basically switches, they turn on and off. He obviously has them alternating on and off. The common point on the primary coil is soldered onto the ground or common of the 2 MOSFETs. then, each end to the output of the MOSFETs. He winds one of these coils in reverse. The effect is that one MOSFET turns on and the other is off, generating a voltage. Then, it goes off and the other MOSFET goes on, but since it is backwards the voltage is reversed. Then the cicle repeats. The outcome gives a sine wave. one peaks, then the other peaks but with reversed polarity. so you get AC voltage. Its crude but works! You don't need to do this. If you use AC from a wall, it already has a proper sine wave, so you can wind the primary normally, since the voltage already goes forwards and reverse, it is AC-> alternating. 2-he chose 35kHz because his MOSFETs are being turned on and off at 35kHz frequency, by the frequency generating circuit he has them hooked up too. You can see the chip in the circuit. these chips can make various operations and can be set for frequency. You can use any frequency you want, normally higher frequency makes a more efficient power transfer. The wall has 60Hz (here in USA). This is very slow and that is why pulse transformers are use with circuits like this to transfer power more efficiently. So set the frequency as high as you can, but you will need to get the circuit to do this. 3- it is my understanding that he is doing the opposite of an SMPS here. in a SMPS you have AC from wall (120V 60Hz here in USA) and you get output of 3.3v, 12v, 5v, etc.... so less voltage. He is using 5v to power his timing circuit and MOFETs with DC. The MOSFETs alternate, outputting 12v but now in AC. then he is stepping up to 380V AC and powering a light bulb. Light bulbs run on AC. 4-wire diameter: he choses the power output desired for this transformer. For a 500w transformer he requires copper wires that can push 21Amps. copper wire can push a certain amount of amperage depending on it's thickness, 5A per mm squared cross section. So he divides 21 by 5 to get desired copper thickness. is he wants to use thicker copper wires, he can get higher amperage and more power.

@@sandermez3856 Thank you for your explain, hard to understand the video because less information and clues, 👍👍

ok, wait me

My English is very bad, very difficult to explain. Please search on google. Google is the best teacher.

you need to know the material of the core. so for that you need to look at the manufacturers spec sheet. some materials are not made for SMPS transformers, however this core was already used as a transformer so it will be the right material. Most commercial transformers have a saturation flux density at 100C of about 3KG. so using 2000 Gauss (2KG) is conservative, and if there is a current unbalance in the transformer then still the core will not saturate. So that is why 2KG is used. Also the higher the Flux change the higher the core loss due to hysteresis in the material.

@@johnconrad5487 thanks for your explanation ✌️

You can pair the two cores together. Or use two separate transformers. Secondary serial connection.

Yes, I will do it

exactly

15:30 I use 450*C . The insulation will burn.

This is the pulse transformer. It works at ultrasonic frequency

What would be the output voltage then ?

You want to use flyback. Push-pull or H-bridge ?

Homemade 102 Push pull.

Use the Boost module. It is available at the store. I think making it very easy.

I think the problems with boost modules are the size and lack of many protections like revers polarity and so on....

I need the core size.

I didn't disassamble how can i measure it?

tất nhiên rồi. Bmax là 1 Tesla = 10000. Mình chọn 2-3000 cho an toàn.

Thanks

I think it's not fake, because I took it in an old inverter.

I have few very same looking ones (like chopped from left and right side like yours) and they blew up. Opened one of them and cristal mouned on Drain body was like 1mm².

:)) 2 MOSFET is very cool when working. Although I do not use heatsink.

@@PhdHung Thanks for reply and nice videos :)

..pls reply sir...thanks..

1cm2 has about 400W.