What a great video about these transformers! Just wanted to rewind the secondary from one of them, so I was searching YT. Your video is what I was looking for. You've learned me how to disassembly it. Very clever. Thank you a lot. Congratulations!
1) If you use your circuit to light a light bulb, the waveform is not important, but surely you know that you are not putting a pure sine wave into that bulb. For powering electronic equipment the matter is quite different. 2) You use a frequency of 35 kHz. How do you know that your transformer has the best efficiency at that frequency? Maybe it has its best efficiency working at another frequency. Have you checked it? 3) Most of the transformers you recover from broken computer power supplies can be used without even touching them. Almost all are rated for 120 Volts on a primary winding with 12 Volts on the secondary. 4) You work very neatly. I liked your video
Nicely done , great . I have rewind the transformer , I always have an issue with tinning the enamel wire , can you share how to , I see you have made a litz wire on the secondary , what is the total wire dimension and number of strands on it , as well as turns
Hi, I have a doubt, for primary 1st half you wound in clockwise but the second half you did in a counter-clockwise wise is there any significance for this direction? pls, explain.
Such a great video but i have a question why did you wind the first loop of primary from right to left and the second half in revers from left to right ?
I make this type supply but my mosfet 3207is very heat on load and without load please help me ineed 30v+- dual supply 5amp for amplifier ,which core is better and how many turn in primary and secondary
Thanks for this video , it is very useful. Just a question, how do you calculate the secondary number of turn ? How you calculate the number 4 used to divide 380V to obtain 95 turns ? BR
@@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.
Great work.💥💥💥. I try building mine with irf540 MOSFET. It worked but the voltage was not up to 230 nd the mosfet was getting very hot. Pls hw can I prevent the mosfet from getting hot. Thanks 🙏🙏🙏
Olá amigo quero dizer gosto muito dos seus videos. quero saber quantos fios e qual a espessura do enrolamento primário e como calculou a potência de 500w
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)
Hello I have questions, 1- How can learn exact topology for rewind transformer or is it necessary? 2- How can learn the working frequency for rewind transformer for example you choose 35 Khz, how ? why? 3- What is atx smps Vinput (vorking voltage) , you know atx smps have 3.3 volt, 12 volt, 5 volt, -12 volt etc. Now, what is the input voltage? 4- And of course wire diameter :)
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.
Hello. Thank you very much for providing this information. Also, if possible, provide guidance on the output filter of sinusoidal inverters, such as the egs002 module sinusoidal driver. What material to use and how to make this filter at different frequencies and powers. In my opinion, it is difficult, and inexperience in this case causes high voltage MOSFETs and sometimes the driver itself to burn out. Thankful
muy agradecido por su video...tengo una duda el calculo no deberia hacerse sobre 24 voltios....pf como saco la potencia de 500 wts del toroidal...muchas gracias
its awesome project sir i have ee55 ferrite core can you tell me one side e core calculation or both side e core calculaton and tell me 1000w use wire guage and number of turns with stable frequency
Thank you for this wondrous tutorial. Can I ask if only the primary is wound clock and counterclockwise? How about the winding in the secundary, the same or not? Thank in advance.
Hi friend I like all your tutorials and your channel one of my favorites… Could you make step up USB cable dc-dc booster 5v to 12v with 1 amp or more. Please?
I have tried everything to solder litz wire and ultimately always have to strip every single wire individually and solder them. So I am curious what flux you are using, because mine does not work this way even at the temperature you show. Can you provide a link to and AliExpress listing?
Hello This calculation is true for the secondary page wire when dead time = 0. And if the duty cycle is 0.96, then for 12 volts 12 × 0.96 = 11.76 Therefore (N / 3) = (380 / 11.76) N = 129 turns Do you think this is the case or not?
AMIGO NOVAMENTE PARABÉNS PELO MARAVILHOSO TEMA. COMO VOCÊ ACHOU A POTÊNCIA ELÉTRICA DESSE TRANSFORMADOR ? É QUE ESTOU COM UM TRANSFORMADOR E Gostaria DE SABER QUAL POTÊNCIA. FRIEND AGAIN CONGRATULATIONS ON THE WONDERFUL THEME. HOW DID YOU FIND THE ELECTRICAL POWER OF THIS TRANSFORMER? IT IS THAT I HAVE A TRANSFORMER AND I WOULD LIKE TO KNOW WHAT POWER.
What is the 380V in your secondary voltage? It is already 270Vrms if yours is Vpeak. Where do you leave you have so high voltage? Most country use 230Vrms or 325Vpeak.
Hello, my dear teacher, I like your work very much. Please write to me what the size of the ferrite core was. How many strings of wire that are multi-layered? Also, write awg and swg of wires. Thank you for your attention.🌟👍🍻
@@PhdHung gud day sir, Sir also the formula that applicable in below 1inch center leg of transformer, and also how to determin the amps of transformer thank u again sir ur the best godbless.
why 380V diveded 4? The two primary coils are wrapped in opposite directions, doest the two coils powered alternately by the two mosfet? is the output 220V Ac?
Thanks. Yes, you can use EE40. I think it needs 2 + 2 turns for the primary. If you use single strings. It cannot work at too high frequency because of skin effect.
![[430] How To Calculate Ferrite Core Maximum Power Handling to Design High Frequency Transformer](http://i.ytimg.com/vi/Fk2OeYY_poo/mqdefault.jpg)
Facebook group : bit.ly/CreativeElectronic
Homemade 102 kích cở dây tính s bạn
Homemade 102 lỏi biến áp tròn đo tính cung giống vậy lun hak bạn
What a great video about these transformers! Just wanted to rewind the secondary from one of them, so I was searching YT. Your video is what I was looking for. You've learned me how to disassembly it. Very clever. Thank you a lot. Congratulations!
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!
1) If you use your circuit to light a light bulb, the waveform is not important, but surely you know that you are not putting a pure sine wave into that bulb. For powering electronic equipment the matter is quite different.
2) You use a frequency of 35 kHz. How do you know that your transformer has the best efficiency at that frequency? Maybe it has its best efficiency working at another frequency. Have you checked it?
3) Most of the transformers you recover from broken computer power supplies can be used without even touching them. Almost all are rated for 120 Volts on a primary winding with 12 Volts on the secondary.
4) You work very neatly. I liked your video
ETD44 : primary 8x0.9mm litz 4turn + 4turn, 3V/turn, 3Vx4turn=12V. f-26khz, Bmax-2000, S-173mm"=1,73cm", Vin-12V. Secondary 90turn 0,65mm. 3Vx90turn=270V, 270Vx1,41=380V + H bridge pure sine ~230V. 5A/mm"? r"=0,325x0, 325x3,14=0,331mm". 0,331x5A=1,65A. 230Vx 1,65A=max 380W maximum....
You're a tribute to humanity, happy new year.
you are the best teacher making proyects..best regards from venezuela
Please...what is the different between many wires and one wire to rewind a transformer? more power or more heat or more interference?
Nice ... first time you did for which i search ...
Thanks for watching
Ótima aula meu amigo. Estou muito agradecido. Vai me ajudar muito.
Thank you
Your videos are awesome and I like it the most.👌👌👌👌👌
Very helpful video. I liked it
Thanks for watching
Thanks for your calculation.
Thank you. I learned a lot. I have a question. In "Secondary 380 Volt / 4 = 95 turns", where does the division 4 come from?
1.bp.blogspot.com/-7Fu59mc6HdQ/Xqa2T6nTpNI/AAAAAAAAAR4/LJTNTXuFByI0nQtqkQKGSa44F1QqTkipQCLcBGAsYHQ/s1600/ewfefef.PNG
Thank you so much for teaching.
gracias por el aporte, seguí así, saludos desde Arg.
I was waiting for this video
Thanks bro
I'm waiting for your video finally done.
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.
Very good my friend. Keep going
Thanks
Best video abuot this complicate transformers i get the idea.
Thank you
excellent information, thank you very much for sharing it 🤝👍
I need to calculate flyback transformer 🤔
Yes, I will do it. Calculation of transformer gap is very difficult.
Thank you and very good video. Can I ask for the formula to calculate number of turns in the secondary, please? Thank you again!
Hi
Thanks for your video. i want to understand more about how can demonstrate the formula in your video
Thank you! 🙌 I took notes!
Where are you from? Your videos are inspiration to many.
thank you
Boiling for 3 minutes, the best thing I learned. They were always difficult to get apart without breaking a ferrite core. The rest I knew.
Can you do a video on the ee5525b core current density
Nicely done , great . I have rewind the transformer , I always have an issue with tinning the enamel wire , can you share how to , I see you have made a litz wire on the secondary , what is the total wire dimension and number of strands on it , as well as turns
I use high temperature + rosin. The insulation will be burnt. 15:30 450*C
excellent...#request video# ....5 stage 12v lead acid battery charger...??
yess, ok
Hi, I have a doubt, for primary 1st half you wound in clockwise but the second half you did in a counter-clockwise wise is there any significance for this direction? pls, explain.
This circuit uses push-pull. So 2 coils will be opposite.
Such a great video but i have a question why did you wind the first loop of primary from right to left and the second half in revers from left to right ?
I use push pull circuit. It needs 2 coils in the opposite direction.
hóng video anh ra
:))
Very nice Good project
Excellent! Thank you!
Great job sir pls make half and full wave pulse transformer winding video. Thanks again
ok, :D
can this formula be used to convert 220v to 12v? What is the 4 in the formula 380/4? Thank you.
Great,thank you; awesome.
I make this type supply but my mosfet 3207is very heat on load and without load please help me ineed 30v+- dual supply 5amp for amplifier ,which core is better and how many turn in primary and secondary
I like video and the best....
Thanks
Great video
Thank you😍🌹💞
Thanks for the video
GREAT VIDEO!!
Didn't you wind the two (3-turn) windings of the thick wire in opposite directions?????
THANKS. This will help much!!!
well done for the video you uploaded. this 380v transformer makes for inverter pure sine wave to 220v ????
Can be used for sine inverters. However, here I use it for an electric fishing.
Hi my friend, your work is great. Explain more about awg wires if you can. Thank you🙏
Just google awg and you find all measurements.
Thanks for this video , it is very useful. Just a question, how do you calculate the secondary number of turn ?
How you calculate the number 4 used to divide 380V to obtain 95 turns ? BR
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.
Sangat suka eksperimen nya
Great work.💥💥💥.
I try building mine with irf540 MOSFET. It worked but the voltage was not up to 230 nd the mosfet was getting very hot.
Pls hw can I prevent the mosfet from getting hot.
Thanks 🙏🙏🙏
Whats the point of 35khz ? Why not 60/50 hz ?
This is the pulse transformer. It works at ultrasonic frequency
What would be the output voltage then ?
Lõi ferrit cái biến áp của e bị vỡ thành nhiều mãnh giờ e dùng keo 502 dán lại thì có dc ko anh
Wow nice i like it
Thanks
Olá amigo quero dizer gosto muito dos seus videos. quero saber quantos fios e qual a espessura do enrolamento primário e como calculou a potência de 500w
Grazie Maestro
Cái dung dịch insulating vanish mua ở đâu hả bác?
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)
Hello I have questions,
1- How can learn exact topology for rewind transformer or is it necessary?
2- How can learn the working frequency for rewind transformer for example you choose 35 Khz, how ? why?
3- What is atx smps Vinput (vorking voltage) , you know atx smps have 3.3 volt, 12 volt, 5 volt, -12 volt etc.
Now, what is the input voltage?
4- And of course wire diameter :)
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, 👍👍
Thanks for sharing
Thanks!
Hello. Thank you very much for providing this information.
Also, if possible, provide guidance on the output filter of sinusoidal inverters, such as the egs002 module sinusoidal driver. What material to use and how to make this filter at different frequencies and powers. In my opinion, it is difficult, and inexperience in this case causes high voltage MOSFETs and sometimes the driver itself to burn out. Thankful
It can be found in the datasheet of the core, wait for me. I'll do it .
Hi there! congratulations!!!
Can is it made for 24V?
of course. At 24V. Use 6 + 6 turn - 2mm2
legal muito bom gosto muito dos seus vídeos
hello. How many strands of litz wire did u use? and i believe the litz wire are gotten from old transformer primary?. thanks
I do not count. maybe around ~ 100.
muy agradecido por su video...tengo una duda el calculo no deberia hacerse sobre 24 voltios....pf como saco la potencia de 500 wts del toroidal...muchas gracias
its awesome project sir i have ee55 ferrite core can you tell me one side e core calculation or both side e core calculaton and tell me 1000w use wire guage and number of turns with stable frequency
I love you bro TR
very good
Thank you for this wondrous tutorial. Can I ask if only the primary is wound clock and counterclockwise? How about the winding in the secundary, the same or not? Thank in advance.
Thank you so much and please make 500 watt i core transformer with calcution
ok, wait me
OK i shall wait for your next video
Tks, friend!
What a good one there, please how do I remove the copper insulation
Use soldering iron at 400 *C. The insulation will burn.
@@PhdHung thanks bro
Hi friend
I like all your tutorials and your channel one of my favorites…
Could you make step up USB cable dc-dc booster 5v to 12v
with 1 amp or more. Please?
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....
sir, how do i achieve this low "no load current" your is awesome. can you show me how
I have a ATX transformer and I want to make 500 Watt powerful inverter so please make a full video on this topic
here th-cam.com/video/6ZPmRCC088M/w-d-xo.html
th-cam.com/video/we9T1EvSOB0/w-d-xo.html
Thanks bro but I want your help bro check my chan*el and please support me bro to grow my chan*el 🙏🏼🙏🏼🙏🏼
I have tried everything to solder litz wire and ultimately always have to strip every single wire individually and solder them. So I am curious what flux you are using, because mine does not work this way even at the temperature you show. Can you provide a link to and AliExpress listing?
The problem is copper wire, please use yellow copper wire.
Hello
This calculation is true for the secondary page wire when dead time = 0. And if the duty cycle is 0.96, then for 12 volts
12 × 0.96 = 11.76
Therefore
(N / 3) = (380 / 11.76)
N = 129 turns
Do you think this is the case or not?
thanks a lot i was searshing for such calculations .
can we applay the same calculation for diffrent firrite core size ????
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
good job
It's awesome dear can you tell me this project driver circuit
There are many on my channel.
Very nice 👍👍
Please make a high frequency transformer with winding calculation 24v ro 400v dc 800watts.
Yes, I will do it
Thank you
Thank you excellent by
AMIGO NOVAMENTE PARABÉNS PELO MARAVILHOSO TEMA. COMO VOCÊ ACHOU A POTÊNCIA ELÉTRICA DESSE TRANSFORMADOR ? É QUE ESTOU COM UM TRANSFORMADOR E Gostaria DE SABER QUAL POTÊNCIA.
FRIEND AGAIN CONGRATULATIONS ON THE WONDERFUL THEME. HOW DID YOU FIND THE ELECTRICAL POWER OF THIS TRANSFORMER? IT IS THAT I HAVE A TRANSFORMER AND I WOULD LIKE TO KNOW WHAT POWER.
Sir please make a video about flyback transformer calculation
ok, wait me
How to know how much max watts can get in atx core or other ferrite core. unknown one found on pcb
On average, 1cm2 max about 400W.
The best
Dây nhiều sợ ngon hơn hả , cảm ứng từ B trung bình 2000 ? .
tất nhiên rồi. Bmax là 1 Tesla = 10000. Mình chọn 2-3000 cho an toàn.
can u make a video of calculating the max wattage of a ferrite pulse transformer (maybe the one in this video as example). Thanks
What is the 380V in your secondary voltage? It is already 270Vrms if yours is Vpeak. Where do you leave you have so high voltage? Most country use 230Vrms or 325Vpeak.
Dung dịch ngâm vài biến áp là gì vậy mong dược trả lời
vecni tẩm biến áp và động cơ, bán rất nhiều.
What book do you recommend or article for ferrite core transformers.
Hello, my dear teacher, I like your work very much. Please write to me what the size of the ferrite core was. How many strings of wire that are multi-layered? Also, write awg and swg of wires. Thank you for your attention.🌟👍🍻
Thanks friend for answer, sorry where you get that information or rather what book is guided.
Muito bom funciona bem..
Sir can u make a video of how to calculate and winding a iron transformer plss feedback thanku and godbless
ok bro, wait me
@@PhdHung gud day sir,
Sir also the formula that applicable in below 1inch center leg of transformer, and also how to determin the amps of transformer thank u again sir ur the best godbless.
Why primary 3+3 turn not 4+4 turn ,when calculated per turn voltage 3.2 V
Other calculation base seconddary output voltage 380 volt why not 220 Volt
I need 380V voltage for the sine inverter.
Can I calculated base on 220 volt
thank you very much. I would to design a transf for high voltage 300 V to 3kV. can you please help me?
You want to use flyback. Push-pull or H-bridge ?
Homemade 102 Push pull.
why 380V diveded 4? The two primary coils are wrapped in opposite directions, doest the two coils powered alternately by the two mosfet? is the output 220V Ac?
Hi my friend, as always great! Excuse me, can I use the transe ee40? What about single string wire?
Thanks. Yes, you can use EE40. I think it needs 2 + 2 turns for the primary. If you use single strings. It cannot work at too high frequency because of skin effect.
@@PhdHung OK . Thank you, my brother👍
I like this project please sir tell me same calculation formula for EE ferrite core and EI ferrite core
exactly
Hi, i noticed for the primary the two windings go opposite ways, is that right ?
Fine. The light bulb is an excellent result. But I need to power my washing machine using solar panels.
hello sir can you please make a video about how to calculate flyback transformer also