How to Calculate and Rewind Pulse Transformers
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- เผยแพร่เมื่อ 26 เม.ย. 2020
- How to calculate and rewind pulse transformers.
In this video, I will guide you, how to calculate and rewind a pulse transformer.
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#Inverter
#12Vto220V
#PulseTransformers - วิทยาศาสตร์และเทคโนโลยี
![[430] How To Calculate Ferrite Core Maximum Power Handling to Design High Frequency Transformer](/img/n.gif)
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Homemade 102 kích cở dây tính s bạn
Homemade 102 lỏi biến áp tròn đo tính cung giống vậy lun hak bạn
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....
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!
You're a tribute to humanity, happy new year.
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
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?
Ótima aula meu amigo. Estou muito agradecido. Vai me ajudar muito.
Thank you
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
gracias por el aporte, seguí así, saludos desde Arg.
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. I learned a lot. I have a question. In "Secondary 380 Volt / 4 = 95 turns", where does the division 4 come from?
I was waiting for this video
Thanks bro
Best video abuot this complicate transformers i get the idea.
Thank you
Thank you so much for teaching.
Your videos are awesome and I like it the most.👌👌👌👌👌
Nice ... first time you did for which i search ...
Thanks for watching
Excellent! Thank you!
Thank you! 🙌 I took notes!
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.
Thanks for your video. i want to understand more about how can demonstrate the formula in your video
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
Very good my friend. Keep going
Thanks
Thanks for your calculation.
Very helpful video. I liked it
Thanks for watching
can this formula be used to convert 220v to 12v? What is the 4 in the formula 380/4? Thank you.
legal muito bom gosto muito dos seus vídeos
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.
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
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?
Great,thank you; awesome.
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.
What book do you recommend or article for ferrite core transformers.
GREAT VIDEO!!
Didn't you wind the two (3-turn) windings of the thick wire in opposite directions?????
THANKS. This will help much!!!
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
Thanks for the video
Thank you😍🌹💞
Very nice Good project
Great video
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.
Great job sir pls make half and full wave pulse transformer winding video. Thanks again
ok, :D
Thanks for sharing
Muito legal👍👍👍👍
que diámetro de alambre usa en el secundario para 220volt ; y trenzado por dos? , gracias
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
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 .
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.
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
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?
Tks, friend!
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 🙏🙏🙏
hóng video anh ra
:))
Thanks friend for answer, sorry where you get that information or rather what book is guided.
Wow nice i like it
Thanks
Muito bom funciona bem..
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.
Grazie Maestro
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.
Sangat suka eksperimen nya
Thank you excellent by
Thank you
I have followed your videos and and tried to make an inverter but when I connect the power supply. i short circuit appears . I already checked the transistors and I have made 2 transformers but it doesn't work. any recommendation or you will know what I'm doing wrong
I like video and the best....
Thanks
thank for your tutorial video, but when i turned via your formulas, the voltage's secondary coil is more than 1kV, i don't know why, i choosed f=36kHz, Bmax=2000Gauss, S =1.363cm2, 12V to 220V => N (Primary coil) =3 turns, N (Secondary coil) =57 turns. Can you answer that where is my error
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.
Thanks!
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.
Good afternoon, just put the calculations for the primary, how do we calculate the secondary data?
Lõi ferrit cái biến áp của e bị vỡ thành nhiều mãnh giờ e dùng keo 502 dán lại thì có dc ko anh
very good
good job
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.
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
sir, how do i achieve this low "no load current" your is awesome. can you show me how
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.
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.
Sir i see ur video, i make etd 42 2+2 trun for 12v sir every thing is ok irf3205 is ok but etd 42 is not work when i power on irf3205 is going heat sir plz help what i do.
The best
Bom muito bom, só não gostei muito porque estava estanhando as pontas dos fios em cima de um livro com um conteúdo fantástico, mas... like pra vc.
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, 👍👍
If there is one wire on the secondary how can it b ac .if so wouldn't it be like a short circuit
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
I love you bro TR
can u make a video of calculating the max wattage of a ferrite pulse transformer (maybe the one in this video as example). Thanks
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👍
Can you do a video on the ee5525b core current density
Friend, I need your help to calculate a transformer that I believe is the ETD49 due to the specifications that I find in the datashett, since he did not bring numbering, I took it out of a burned old inverter, which I apply the formula that appears here in the video, being the It works at 50 kilohertz and it comes out in the primary one turn only and in the secondary it comes out 63 turns the diameter of the inside is 1.67 since the there is round and not square another observation that he is ee49 vertical thanks I hope you help me
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

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.🌟👍🍻
Hi, brother let me know if possible to parallel the transformer 500watts with same size to make 1000watts.
You can pair the two cores together. Or use two separate transformers. Secondary serial connection.
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....
excellent...#request video# ....5 stage 12v lead acid battery charger...??
yess, ok
Very nice 👍👍
Please make a high frequency transformer with winding calculation 24v ro 400v dc 800watts.
Yes, I will do it
Hello, i have an atx psu transformer. My question is will I get the primary input 220V? My transformer power is 750W
I need the core size.
I didn't disassamble how can i measure it?
hello sir can you please make a video about how to calculate flyback transformer also
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
@homemade102
Good, thank you...
Done
with this calculation I will be able to then calculate a 2 x12 to 220 volt transformer for construction to pure sine wave Inverter ????
of course
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
Where are you from? Your videos are inspiration to many.
thank you
Sir hw did u control the current flowing into the transformer to be 21amps.