Convert Square-Wave Inverter into Sine-Wave Inverter
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- เผยแพร่เมื่อ 26 ม.ค. 2025
- I just bought a square wave inverter from a second hand store, Today's project, I will convert this square wave inverter into a sine wave inverter. Using module EGS002.
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#Inverter
#Sinewave
#12Vto220V
thank you, you give me an opportunity to buy way cheaper inverter and then convert it to sine wave, I hope this will make those manufacturers consider to lower their sine wave price
Yes, I will try with my microcontroller. If successful, it will be cheaper than EGS002. Wait for me.
Any update as regards this?
Is it possible to convert msw to psw via AC output? So we dont need to modified the inverter or break the warranty.
yes, I'm designing it, waiting for me a week.
@@PhdHung great 👍👍👍 thanks
Waaaoo the best in the whole network. you are a brutal in electronics surprised.
Converting a square wave power inverter into a Class D amplifier. Nice 😊
ok bro, wait
Sir your all project is best .you are great sir . always wait for your new project.❤️
Perfecto to es lo que estaba buscando por toda la red.
Gracias por este buen vídeo.
Sigue creciendo amigo
Thanks bro.
Is there any calculation for find right value inductor and capacitor on the output ???
or just winded randomly and random value of the capacitor
2.5uF and 3.2mH bro. See it in the EGS002 datasheet.
@@PhdHung
great thanks :)❤
Good job regarding the second half of the modification. But the first stage needs modification as it's set to output 270v dc, and you need at least 320v dc to obtain 220v rms ac at the output.
I think feedback or increasing the oscillating frequency should take care of that.
@@juliusparker3039 it could, if the transformers have enough headroom (primary:secondary more than or equal to 12:320), which are usually not, as they are usually designed for the cheapest functional ratio (12:270).
Bro what will happen if I don't use 2.5 mh inductor in series with output
Need to rewind the transformers ? from 270V to more than 320V (mine, not this one, is 380 Volts before the H bridge; it will not work well otherwise ?
Just adjust the feedback.
Your tools look professional
What i get in this video:
1. We convert to sine wave by applying SPWM to the stage-2 mosfet (what it is called usually? Secondary mosfet? Stage 2?)
2. We dont really need to change frequency of the oscillator or change nunmer of turns of the transformers
Am I correct?
The frequency seems unstable. Is it because of the ferrite core transformers?
amazing..............
bro you are the best of the best !!!!!!!!!!!!
thanks
please make a 100-150w small size sine wave inverter for car ....
With out smd ic or components
Is the 77083a7 core iron powder or ferrite ?
Is true that converting to sine wave improves the overall powerfactor ??
Hello, why the VFB feedback (about 2.5V - 2.9V) does not work on the AC output voltage, as it is in most diagrams, that there is a 200k, 10k resistor, 10k potentiometer for voltage threshold adjustment, filtering capacitor. Even the original H-bridge from Aliexpress doesn't work because of this. Only installing a rectifier bridge between one AC output and common ground for everything and adjusting the voltage to about 2.7V gives the effect that the EGS002 does not see overvoltage or too low voltage at the H-bridge output after the 2.5mH-3mH choke and a 2.2uF capacitor / 630V that works approx.
how many mm of copper wire are used to make the inductor???
4) I understand that the EGS002 board comes from the factory to operate in SINGLE PHASE !! And because of that, I only have PWM on pins 8 and 10 of the board. How can I enable the PWM on U2 (EG8010) to have modulated signal on pins 27 and 28 of this integrated circuit? I was comparing this board, with a similar one, that uses a PIC instead of the EG8010, but with the same two UR2110S, and I can see that the four signals (pins 3, 5, 8 and 10) have PWM !!! AND IT WORKS PERFECT !!! I await your valuable answer! Thank you very much!!
A modified sine wave inverter has a lower output voltage than a real sine wave inverter. Without rewinding the high-frequency transformers, the efficiency will decrease. Try to reach 220/230 volts AC via the EGS002 and then measure the still possible output power and efficiency (watt input watt output). I would be very interested in a Part 2 with these results from this rebuild.
Yes, on the old inverter, the DC voltage was only 260V. I will rewound the pulse transformer to increase the voltage to 380V.
@@PhdHung Why 380 volts? It's a single-phase inverter. To effectively achieve 230 volts, 230 x 1.414 = 325 volts is required at the output. Aren't you wasting too much power in the transformer at 380 volts? Can you test the maximum Watt after rebuild? thx
egs002 kit can use 2000w Square-Wave Inverter?
yes ok bro
Hello homemade102!
Questions: 1) Why do you use FR107 diodes and not 1N4148? 2) Why on the board that you made, the FR107 diodes, are connected to the reverse of what the EG002 datashett shows? 3) In my test of the circuit, I found in the oscilloscope, only PWM signals on pins 8 and 10 of EGS002 = pins 1 and 8 of U1 (IR2110S) = pins 29 and 30 of U2 (EG8010), but I don't have PWM on pins 27 and 28 of U2, not in pins1 and 8 of U3 (IR2110 S) and not in pins 3 and 6 of EGS002? Please, I await your reply! It is very important to me! Thank you very much!! From Argentina.
ifb current feed back how can i add it to my inverter that i converted it to sinewave ? can u help ?
i am looking for your video, the pulse transformer 500VA UPS was converted to square wave to sine wave. please help
here th-cam.com/video/frLEn1PAvw0/w-d-xo.html
Very very thank you
This is a great video. Would have loved to the wave form of the original inverter and that of when you were done. But nice video. this proves that converting of old inverters can be done
Please your inductor uses 90 turns, what was the length
Help sir,i confused in IC ka7500b with 8 and 11 pin of h bridge in msw inverter stage 2 AC mosfet,in Egs002 there is 2 right and left with low and high pin,so there are 4 pin osilator,how can i connect to 8/11 of ka7500b?
Hello homamade 102 !! I have already been able to download the information of what I needed to know !! You do not need to answer. Thank you very much and congratulations, your work is very good !!
I would need information about the toroidal coil, the diameter and the composition material of it. Thanks
i use Ferrite 77930-A7
is this conversion useful for the eu power supply?
An excellent conversion, i will practice it. thanks
Thank you and good luck
Your are next level genius.
Thanks bro
Nice Video Excellent conversation i will try
Goodluck
I have a old mod sine inverter I'd like to do this with, it's a 12v 1200 watt, with good surge capacity, the sine wave hurts some equipment, like transformer in a small radio, and ballast in florescent light, so I do not use it, will this work with a low frequency Inverter? Or UPS? I haven't looked at it, but I'm thinking it may be a push pull, in the UPS, or is this high frequency only driver?
Your inverter is not square wave as in your caption but a Modified sine wave convert to pure sine wave ✌️ i like your project
Hi brother thanks for the video. Doing this is it give 220v output or less than that? Or need to modify primary side of transfomer
yes
If we reduce the turns of primary then we should increase the switching frequency so instead of modifing primary side can we modify secondary without effecting the switching frequency.
What is the benefit of turning square wave to sin wave?
the motor will work smoother.
So we need sine wave just for motors?
@@Robonova :
You need sine wave for all inductive loads. Only pure resistive loads will work identically with sine or square waves.
Example of resistive loads:
- bread toaster.
- air heaters (resistance).
- incandescent lights.
- simple water heaters (no electronics).
@@ajarivas72 I do understand now, its been 8 months. Anyways thanks for your reply! I appreciate it!
Two questions:
1) Would you still have a decent sine wave under heavy load 1000W ?
2) Can I use this kit on a 110V 60 Hz 1100W (2200W surge) modified sine wave inverter ?
Thanks !
Good project . but you forgot to step up the dc level before H bridge . when you turn a square to sine without changing the dc voltage , effective amount of voltage will decrease . if you put a multimeter after converting it to sine it will show lower voltage than it had before .
Yes, on the old inverter, the DC voltage was only 260V. I will rewound the pulse transformer to increase the voltage to 380V.
I will practice it, thank you sir for the instructions
That's a great piece of work!
Thanks bro
I want the daughter boards for this , i have lots of modified sine wave inverters to change , where to get them????
Find EGS002 on google, it's very cheap.
Hello. Great job. I used to convert 2 of my inverters to sine in almost the same way before, but I re-wound the transformers to give a 360 volt dc output. Because the inverter transformer itself was 260 volts. Do you not need to change the secondary trans page wire to do this?
Yes, exactly, the output DC voltage is 300VDC at 13VDC input, I need to rewind the transformer.
a friend of mine bought a 1000 watt pure sine wave for 93 dollars it was new, with the prices have come way down, it hardly seem worth the trouble now a days
You don't show the video of pure sine wave form...
16:04
Next,,modifiyig atx power supply without changing its board,to make variable output voltage
ok bro
@@PhdHung variable voltage and current with and without ic protect
You need to change the feedback resistor of the PSU with a variable resistor.
@@TheRailroad99 variable voltages make it. Variable curents i haven't. Pls note which feedback resistor on pin should be modified and what sheme or parts needed ?
@@atourochman1240 Ahh, current. That would not be easy. (But probably doable. If the current is too high, a feedback loop could be used to lower the voltage). For the feedback resistor: it depends on the PSU, not every ATX PSU is the same inside. This is just how most switch mode PSUs work, if I remember correctly.
Thanks sir, I have been having it in mind,you made it easier for me.
I wanted to convert mine as well. Your video was a good tutorial for me. Thank you.
You are creative and inspiring ... !!
Thanks bro
Hello, nice video ! i did the same circuit for the EGS002 but i ended up burning 2 of them. Each time i plug in the 5v i got a short. Any idea why please ? thanks.
Wow wonderful appreciately project.
Thanks
you are pretty good at power electronics.
Great stuff, but a schematic of what you did (how you attched the board) would help...
Very good dear keep it up
Thanks bro
Hello my brother, do not be tired. Excuse me, what was the size of the ring inductor wire?
as always good project, thank you
SINE OR SIGN:-
sine:--
the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right-angled triangle) to the hypotenuse.
sign:--
an object, quality, or event whose presence or occurrence indicates the probable presence or occurrence of something else.
cái này em làm hay nè....he he he hôm nào có tài liệu hay bằng cái nào đó em dạy anh làm inverter nha
How i can converte usfull inverter to sine thank you iam from Syria
Super, ahora trataré de hacer lo mismo
Hello sir i appreciate your work very much.. I have the egc002 but where can i find the completed board.. I searched about egc002 on Google it comes without That board and adds.. Can you please leave me a link for it
egc002 or egs002?
Guten Tag, haben sie auch mal die sinus ausgangsspannung gemessen? die glühbirne leuchtet dunkler als vorher bei dem modif. rechteck. ...vielleicht müsste die spannung die in die H-brücke geht erhöht werden....das ist aber etwas schwierig..viele grüße.....und bitte weiter so tolle videos
Yes, Just adjust the feedback variable on the PCB
Hi! I've been watching your inverter videos for a few days !!! Congratulations!!! Here in Argentina, I repair many inverters and test the egs002 board, although I have broken some. Question: can you send me the circuit you used to adapt the board. I mean the board that contains eight resistors, four diodes, four capacitors and the 7805 plus the multiturn presset? Also the connection diagram of the seven white wires? Finally, the voltage of + B High, the various, changing the frequency of the oscillator sg3525, raising it until reaching the necessary working voltage?
I don't know your name, my name is Jorge !! To what email can I send you inquiries and share information? Thank you very much!!
Project file in video description
Try download the datasheet of egs002 u can see example circuits there,
what was the measured output voltage? You are incorrect on the transformers they are 1000w each and their outputs are wired in series. Not a bad video.
I have trapezoidal wave form home ups. can it convert into sine wave
Yes, of course
Will love for you to make one for 1.5kw but 110-120vol is the current we use.
Why the frequency cycle is fluctuating between (24Hz to 49Hz) in your oscilloscope? Love from Pakistan :)
I have a modified inverter with 72VAC output. Fan spin slow, lots of noise, feedback POT does nothing.
hi... i want to ask if the wattage output as before or lower? thank u.
Hello home made 102.i download zip file now but there is no eagle .brd file...!!i think you forget upload eagle file in zip...
www.mediafire.com/file/p0flty08zmoz0s3/File+MOD+SW.rar/file
Homemade 102 oh.tanx mr baek...
What cap filter value that u use
2.5 uF 630v bro.
@@PhdHung thx very much
Meaning no es0002 whatever the name of the ic is ..no sine wave...so what if you don't have that ic..can't it still be done..yea how can can it be achieved with small discrete components..
Using EGS002 is fastest and cheapest.
Kindly sir tell me circuit how to connect egs002 board
Good work, I subscribed your channel in reward of this video.
I could not find the link of the circuit diagram and component list, you could upload it ?, Thanks
Project file in video description
Can you make convertion alsp for 200watts?
ok bro
@@PhdHung thank you so much. I hope for that video very soon.
Hi bro if you convert what are the benefits? Can you explain it plz
Lol you almost change the whole thing!
For the four parts (MOSFETs as one)
You just rebuilt it.
Any chance you can design up a 'progressive' board design. Start with lower power and easy to add series based on the same controller?
:D
Hi brother, if you could show me how to make an inductance meter like the one you show in the tutorial I would appreciate it, thank you very much for the video
Very nice 👍👍
We can use atmega8 sine wave board??
I will try and answer you.
@@PhdHung ok dear, thank you.
Merci beaucoup pour les informations khalid du Maroc Casablanca
آفرین ❤❤❤
Sweetheart and very nice video
Chào bạn nguồn cấp biến áp nhỏ 12 v 98 xung cấp cho bo âm thanh của ti vi crt cũ. Mình cắt ra. Qua cầu nắn, nọc nguồn bằng tụ hóa 25 v 1000 uf.ra 16 v 34 kết nối vào ù to nên nắn xuống 13 v 25 nó vẫn ù nhỏ hơn. Vậy phải làm sao để nó không ù nữa. Ổn định, acquy 12 v 5 ah chạy không kêu gì cả chạy êm mát ngon. Xin tư vấn
bạn lắp thêm mắt lọc pi cho nó xem sao.
@@PhdHung do biến áp dòng thấp. Cho mình hỏi một mạch chuyển từ Dc sang ac 400 v dc ra 220 v ac 5000 w và 12 v dc ra 220 vac sin chuẩn cần bao nhiêu fet.cần thêm những gì. Móc fet nào có áp và dòng cao.
@@oibacbeo9285 nêu s12v ra 220V bạn có thẻ dùng con nào cũng đc. mấy con fet tháo đạp diện ấy. max 12V chỉ nên là 1000W thôi. cần khoảng 12 đến 16 mosfet tuỳ loại tốt xấu. Còn 400VDC > 220VAC 5KW cần 8 mosfet hoặc 8 IGBT
@@PhdHung cảm ơn bạn.
sir ...I'm your regular subscriber.I watch your videos.Plz make 230vac 50Hz to 12/24v PWM Refirigetor Compressor controller circuit.
Yes, that's a good idea I'll try.
Where I can find the inductor core???
Nice logo did you design?
?
Homemade 102 I mean the bulb 💡 logo for the channel
Maybe he's not understand "logo"?
Felicidades saludos desde Bolivia
Wow nice work
Nice video sir👍👍
im always say you are the best :)
I'm glad to hear that, thanks
Not nice at all time
@@techbarron7383
😡
How to convert square to sinewave using 12f693?
The mediafire link gives more advertisements than the actual file to download if opened in Safari browser. Use Chrome instead.
Chào bác e có 1 con inverter 12v 500w sóng vuông e muốn sửa lại sóng sine bác có thể giúp e được không ạ
500W thì bé quá. sửa phí công lắm bạn à.
Homemade 102 dạ vân vậy bác có mạch 1000w sóng sine 12v không ạ
Very nice project!
Thanks bro
Why inductor connect series ,filter propose.
I connect according to the schematic of EG8010.
Bro, the scope says 25 Hz instead of 50Hz.
It's manual measurement. 2 cycles of 50 Hz = 25 Hz
@@imcrazy886 I didn't understand you, what is the manual measurement here?
@@nitinkumar29 It's an old oscilloscope which can't caculate the frequency automaticly. You have to move the left and right cursors for the time(frequency) measurement by your hand. That is, he didn't move the cursors correctly. You can look at the sinewave, peak to peek is a cycle for frequency measurement. When the oscilloscope shows "24.8Hz", there are about 2 cycles between the cursors.
@@imcrazy886 Thank you. You are right, noticed now about the cursors.
he he he ngày hôm qua tới ngày ni chưa có em nào nhiểm cô-vy tại Đà Nẵng ......
Đang đói quá anh. Mong cho hết dịch nhanh nhanh còn đi phụ hồ tiếp nè.
@@PhdHung ô sao xiêng quá vậy ko biết còn làm những job gì nữa đây
Awesome video.. the best
Thanks bro
@@PhdHung your welcome
24.9 HZ ? Can you run it at 60 HZ?
If you notice the cursors and waveform in between them, you will realize that it is 50 Hz. I think, you can change frequency with the potentiometer on the board.
From egs002 just resolder, the jumper 5 is 50 hz,and jumper 1 is 60 hz