How to Repair 2000W Sine Inverter

[@PhdHung]

If you like my video, give me a cup coffee. Thank you very much. Donate : www.paypal.com/paypalme/phdhung Facebook group : bit.ly/CreativeElectronic Contact: [e-mail] Phone: [phone]

[@maestrojedger9779]

Which is better, de-solidering the components and reading separately or reading the components directly on the board ?

[@listener1940]

Appp

[@viceapa4691]

Speak

[@pacifist2829]

With your help, I was able to identify 6 defect mosfets. If my inverter works after replacing those, I will buy you a cup of coffee. 😀

[@rolanddanzalan3306]

Boss how to repair power fault my power inverter after 5mins..

[@l0song]

Oh god, thanks alot for the video, 100% content 0% nonsenses. Tired of all those 99.9% talking nonsense but 0.1% contents. Support your video !!!

[@saturn7_dev]

Wow - lots of parts to swap out - something I or 99.99% of people would never do..great result though. I only fix motherboards or power supplies if simple stuff like blown capacitors and maybe diode pack or fuse. Thanks for the detailed breakdwon though...very informative.

[@uncontrollabledogs3791]

Nice work and right- to-the-point video. Just Great.Please post more like this. Inverter repair shops want $$$ for repair like you did. 🎉

[@kainduran3480]

You make repairing an inverter so easy i have to say you are blessed with a lot of knowledge...!!!😲

[@golgothapro]

This is hilarious. I'm still waiting for delivery on a 2KW 72v dc to 220v ac unit like this I ordered about a week ago. May be I should have ordered another filter cap and some MOSFETs to go along with it. LOL

[@aa___al-abdullah9870]

Excellent video. We would like you to continue publishing such videos

[@PhdHung]

I will try

[@janjanowski2891]

You are great ! Thanks to you, I have repaired my inverter !

[@PhdHung]

[@speedsterh]

Superb repair. I love that you show what you're doing and why. It's very logical, and so satisfying to see the device working. You're one of the very best doing that on youtube (or I haven't checked well enough :D) I also like the concise but very informative text you put in. Simple but super effective.

[@PhdHung]

Thanks bro

[@mahathirmohammadjubair1209]

@@PhdHung 18:45 where are fuses that you removed first?

[@rongroen1882]

Super. I have the same PCB but with different problem. Is there a circuit diagram available?

[@PhdHung]

Today, I bought a broken 2000W inverter from a second hand store. I will show you how to fix it.

[@mustafayurtbegendi345]

Share us such a beautiful full sine circuit Master's health

[@PhdHung]

Yes, I will design it, wait for me

[@sathiyaraj4516]

@@PhdHung where are you from?? Bro

[@ahmedelnaggar8017]

Can you share me the second hand store, please?

[@robertobebe7235]

Envie seu zap para mim ou ligue para mim para poder ver o preço desse produto que eu estou necessitado desse

[@johnboscoanosike4927]

The best I have seen online so far. ❤

[@johndoe-sz4iq]

Great Video Thank You God bless!

[@PhdHung]

Thank you very much, people like you give me more motivation to make videos.

[@superkhan1934]

You are just amazing...I never skip ads on your videos

[@PhdHung]

Thank you so much

[@davidbolha]

@ 19:02 So you don't put that white industrial grease on the mosfets (& on the silverish rubber pads) ? 🤔😕 Thanks !

[@lookoutleo]

Very interesting especially checking pwm with oscilloscope, what needs to be inline to stop damage , your video is very instructive for repair . Thankyou for posting

[@nasirkhan2875]

Excellent Bro you look a high level professional. Keep it up

[@PhdHung]

thanks bro.

[@phillupson8561]

AC work bare foot, you're a brave man ;) Loved the video, thanks for sharing!

[@markdoyle8713]

So much knowledge being shared here. Thank you

[@Epistuff]

Nice video! I've got a Boost 3000 w model B3K inverter. The issue is that if I put a scope on the output, it only has the top have of the modified square wave, not the lower half of the waveform. What's the most common cause of that?

[@josepeixoto3384]

i'd like to know too; guess mosfet or mosfets on one side shorted out; or the mosfet drive for one side?

[@125kudzi]

If i dont have oscillope can i use my DMM to test SPWM signal without affecting the signal

[@PhdHung]

ok bro. If you use a classic multimeter. You will see it fluctuate a bit. voltage is about 5.5VAC.

[@125kudzi]

@@PhdHung noted. So it is within that range.

[@mahdibarati2841]

I personally would've changed the other two MOSFETs to match the new one. BTW good job

[@PhdHung]

Thanks

[@captango]

Having tested the mosfets like you have shown, a couple beeped which indicated they are burnt. However a couple only beeped on toucing one pin but not the other. Does this indicate these are burnt as well. 🇬🇧

[@AliRezaJoodi]

Great teaching Thank you

[@nix_playzz]

Very good information about inverter and good teaching. Love from Pakistan thanks

[@francisdoll1253]

You are a magician,congratulations ! I'm impressed

[@PhdHung]

Thanks

[@saneeshelectronica9293]

very nice video do u have the block diagram of the circuit where is 3845 and sg3525 used . why two trans formers .

[@josepeixoto3384]

2 trafos in parallel,instead of one big one

[@theraghavs]

Hi, thats alot of details o grasp.. What are the primary reason of these inverters getting burned out mostly?

[@saarike]

Excellent repair!

[@vsl5917]

This is great, I have a question for you, can you convert a pure wave inverter from 24v to 12v?

[@MrBobWareham]

Sounds like you have a busy shop, good video thanks, hope it was worth it, a lot of work.

[@08360949]

I have a question, What are the correct measures of the spwm signal? I mean what are the limits? Thanks for the video!

[@homeelectronic1775]

Hi. Very nice. What is the microcontroller used in the spwm driver?

[@PhdHung]

it use PIC16F1828

[@homeelectronic1775]

@@PhdHung .ok. Tanks.What do you think is the difference between using an eg8010 or a PIC family microcontroller to build a spwm driver? Except that the EG8010 doesn't need a program and is generally different from microcontrollers.

[@PhdHung]

I think PIC microcontroller is more stable. Especially dsPIC

[@vinylapplying]

@@PhdHung there is no 18 pin SOIC(corpus) for 16f1828... it is something else.

[@ghostlee900]

Hi grate video. I have 3 out of 4 mosfets blown in my inverter irfb13n50a but they are not available. I dont no how to deside an alternative. What do u suggest

[@35meco]

I like your working style 👍

[@PhdHung]

[@electronic7979]

Very good video

[@iosifiosif4694]

how many will you have and what temperature should the soldering iron be adjusted? Please

[@PhdHung]

I use tip T12 @ 350*C

[@andresbatacan463]

Hi the samlex 1500 12v that I told you before is now showing over load. I change some of the mosfet as you told me and now giving me a trouble again. I appreciate very much if you guides me how to fix.thank you so much.

[@MasterCoolSiemReap]

Good sharing teacher

[@PhdHung]

[@TuanNguyen-eb7vl]

Very professional. Thanks you for share.

[@PhdHung]

Cám ơn nhé :D

[@homeelectronic1775]

I was waiting for the push pull driver with tl494 and lm324, whose driver is available, and I asked you to design it as a DIP.

[@PhdHung]

do you need volt feedback?

[@homeelectronic1775]

@@PhdHung I asked you for two circuits, one push pul driver with tl494 + lm324 and one H driver for 310 to 220 volts with tl494. In tl494 + lm324 driver, one of the pins is for feedback. And to control the output voltage dc is needed and can be used for different circuits in general. And if you mean the Hl driver with tl494 for a 310 to 220V modified sine inverter to keep the voltage constant, if the push pul part has feedback, I don't think the dc to ac part needs feedback. Again, you know better

[@homeelectronic1775]

@@PhdHung The available tl494 + lm324 driver is smd and I asked you for the same driver as dip. Because I think the driver is perfect. In the case of low and high voltage protection and temperature and fan and buzzer. Don't you think so?

[@manoftheday1]

@@PhdHung YES Please

[@superkhan1934]

Most of the commercial inverters use TL494 PWM circuit in both DC boost and H-Bridge section. They use LM324 or LM358 op amp for other funtions like over under battery voltage protection, over load short circuit protection Temperature sensor Fan and led indicators. They are reliable and easy to repair....I have also requested him to design an inverter using these components.

[@dmpelektro]

I want to ask, how if mikrokontroler pwm pure sinewave is broken, can you repair that, because ic pic16f716 must be prorgramable first before we use in the kit

[@sindhuc4655]

what a amazing work good job thanku for giving a chance to watch you

[@PhdHung]

[@davidsegun452]

I love ur explain sir very 👍 Good sir

[@Galileo-k5g]

En primer lugar muchas graciaspor tus videos, eres extraordinario reparando inversores, me han regalado dos Vision Ups System averiados de los llamados Online, son grandes y no me atrevi a destaparlos, pero despues de ver tus videos me he animado, pues lo haces tan facil y con esa destreza ,veremos haber como quedan.

[@wouter3308]

Hello, nice repair! I have the same inverter with the same mosfets broken, but unfortunately I have no pwm signal to the mosfets, and there's no 5V present (display and 12V are present). Where does the 5V normally come from? 03003A?

[@unokojoseph2925]

Please what power source did you use the powering the inverter?

[@MrOner07]

i dont quite understand all of it... but this video is very helpful. thank you. you earned a new subscriber. and the inverter is exactly the same as the one im trying to fix 😀

[@franciscoantonio1372]

Wow! You are amazing, great job! Greeting from Brazil!

[@unokojoseph2925]

Please what did you use in powering the inverter?

[@minhphuc1283]

sir. How is the remaining output signal on the 2 pins of the H-bridge driving circuit?

[@PhdHung]

2 chân băm SPWM còn 2 chân là sóng vuông 50hz nhé

[@minhphuc1283]

@@PhdHung xin hỏi. 2 chân spwm có tần số bao nhiêu vool và điện áp bao nhiêu

[@peerhamzag9574]

How can we determine by seeing component of inverter that it is really a pure sine wave inverter? Which component makes it pure sine wave?

[@Mr31Chris03]

The big toroidal copper coil (2mh) on the output side in combination with the big foil condensator (2,2uf 630V) builds up a low-pass filter. This low-pass filter eliminates the high carrier frequency (mostly 50khz square wave) where the 50Hz sine wave is modulated in. And after that the only thing left will be the 50hz sine wave. It is almost the same working principle like a class-d amplifier. In a normal modified sine wave inverter this low-pass filter doesn't exist.

[@NeerajKumar-pg1fq]

Super.....U r genius 👍

[@krutty2]

Very Helpfull Knowledge

[@PhdHung]

Thanks, hope you enjoy it

[@ayob5771]

Very good troubleshooting

[@jahirulislamshovon9256]

You're REMARKABLE 👌

[@bongsbeastie]

Very good work

[@adesuyisunday4287]

Nice repair skill. Thank you very much for this video. Can you do project on power supply to do inverter test for 12v to 48v. It will help where no battery is available for testing inverter.

[@satd2024]

Very nice and informative

[@PhdHung]

Thanks bro

[@unokojoseph2925]

What is the name of the box you used in powering the inverter?

[@TheJavaSync]

Inverter w/ ferit transformer is more compact in size Thank You, Master Zirconium

[@cristianpopescu78]

Beautiful work!,Thanks for sharing it!

[@cristianpopescu78]

Nice work!Thanks for sharing!

[@DuroLabs85]

Hi bro, love watching your videos. Any idea what could be the gauge of the wire for primary and secondary of the transformers ??

[@siam817]

Good work brother

[@PhdHung]

thanks bro

[@siam817]

Most welcome brother.Im from say Bangladesh?

[@jackpatteeuw9244]

That style of clamp used to hold the MOSFETs and diodes to the heat sink is much more effective than just bolting through the mounting hole of the TO-220 package.

[@hidayathmydin4676]

Hi Home Made 102.. Many thanks for your great effort to do this kind trouble shooting video to help others.👍😊 The PWM square wave show some small spike on top side. Is it the spike cause of Mosfet dead short?. or anyting else. Thanks.

[@PhdHung]

No, it is due to totem pole driver.

[@PhdHung]

I don't know why, but when adding totem pole driver to SG3525. will appear small spike. and it does not affect the mosfet.

[@hidayathmydin4676]

Ok. Thanks.

[@stevemcgavren7645]

Fascinating video. My AIMS 2000W inverter cuts out at 440W. Any thoughts?

[@iondaniela8111]

i Have a probleme with a 800w 12v pure wave inveter the output tension is between 150-160v but cant reach 220.What seams to the problem from your experience ?

[@adelbertmadredinos6946]

Wow. Brilliant work.

[@PhdHung]

thanks

[@ElektroTech84]

Hello sir, I have a 2000w modified sine inverter. The AC voltage is 330 v and one of the 400v volt electrolytic capacitors at the output starts to heat up after a few seconds. Where should I look for the problem? I would be glad if you help

[@subhimesto7123]

Hey man, Awesome video and great explanation. Honestly the best that I've ever seen in my live, one question thought. Why do you test MOSFET with diode mode and continuity mode?

[@QanaDiys]

Because a right MOSFET has G and S seperate from D

[@infopluschannel]

excellent job, well done.

[@PhdHung]

Thanks bro. Have a nice day

[@srinivast3709]

Thanks so much for your valuable information

[@timothysmith7700]

Awesome work!

[@danielugwa6517]

I love this thank you bros. sir once more I need your help why is my inverter mosfet overheating till it gets burn thank you

[@rajeshshrestha9847]

I like this repair

[@PhdHung]

Thank bro

[@nicolevurden8331]

THANK YOU VERY NICE

[@superkhan1934]

Most of the commercial inverters use TL494 PWM circuit in both DC boost and H-Bridge section. They use LM324 or LM358 op amp for other funtions like over under battery voltage protection, over load short circuit protection Temperature sensor Fan and led indicators. They are reliable and easy to repair....Please design an inverter using these components..Thanks in advance

[@PhdHung]

Yes, but with sine inverter, we cannot use TL494.

[@superkhan1934]

​@@PhdHung Yes you are right..These inverters are probably modified sinewave..(I dont have an Osc Scope)I am using a Chinese version 1000 watt...It works well with my PC, laptop and other power supplies..Thanks for the reply

[@markv1159]

dopo vari inverter che scoppiano appena collego un freezer credo che ne farò uno con trasformatore e mosfet alimentati in pwm semplice, almeno senza protezioni: salto il problema (forse) e sarà sempre riparabile dal costruttore 😊

[@BadRonald1]

So how many years experience in Electronics would it take to fix what you did. Im a beginner and love to tinker with electronics. I have a lot of vintage receivers. And would like to learn how to fix them properly.

[@PhdHung]

2 year bro

[@versatec1]

Hi...long shot...spilt water on my 4000w inverter...some smoke a pop and now the DC + & - Battery inputs short out when I try to connect them to the battery....Do you know what damaged component/s could cause this? Or a general idea? Thanks👍

[@PhdHung]

First you need to check all mosfet.

[@versatec1]

@@PhdHung thanks...I have just this moment learnt this...didnt see your message..Thanks...I will let you know the result of the mosfet testing 😊👍

[@versatec1]

Just to let you know on the dc positive input side there is a 400v capacitor and the same for the negative side....The inverter was switched of but the water shorted the switch and turned the inverter on😨

[@versatec1]

If you can help me at least find the problem , even if im not able to fix it myself, I will send you something to your paypal😊👍(im learning electronics and find the subject facinating)

[@petniyi35]

please which is best mosfet among irf1404 and 3205. please explain to me

[@Eckotich]

my inverter is 3000W but its similar as you bought. spwm board using IC ID7S625 as driver my question is my is ID7S625 pin same with IR2110? i can't find any information about ID7S625 pinout except their company

[@PhdHung]

I think it's similar.

[@Eckotich]

@@PhdHung can i get some picture of your spwm board? if yes i'll contact you on fb sir

[@movieziz573]

Good knowledge

[@PhdHung]

Thank bro

[@Davidslabofficial]

Awesome job Weldone And thank you 💓

[@skymax1337]

Hello, first i want to thank you for this great tutorial. I have some questions about how this inverter works. Why there are so many transistors? Which ones are for H-bridge? Are the biggest ones or 75NF75(and if they are not, for what are they)? Also why there are 2 pcb for PWM? The most important question is how it becomes sine wave from PWM, because at the gates of MOSFET's u've got a pwm of 36kHz and some 71Hz on the second ones? I'm sorry for the many question, you are my only hope. Thanks!

[@techinventor101]

The SG3505 control the MOSFETs in the DC boost section and the spwm driver produce the sine wave at the output(The H-Bridge )

[@white2eagle]

Thank you for sharing this, I have a 3,500 watt inverter and I wanted to replace a couple of MOSFETs . The part number of my inverter is FB38N20D P038D and I found one on Amazon with part number FB38N20D P826D, could I use these or are they a different number all together?

[@brianredmond4919]

Interesting and helpful but back in the real world these youtube fixes never seem to be the faults i get. ☹️

[@andresbatacan463]

Nice job well done and I have 1500 watts pure sine wave and don’t work. If you switch on the over load light come on and alarm is there. I want to fix it can you please advise me how can it be done

[@PhdHung]

First, check all mosfets.

[@andresbatacan463]

Thank you sir. I recieved the mosfet FDA59N30 to replace 8 pcs. This mosfet is the same as the original. I Find laso ti ceramic 250v is burn out so I change . And weeh the inverter works again . Thank you again with out your Channel maybe I might not able to fix my inverter. I have no knowledge about electronics but watching your Channel I was able to do fix it. Keep it up share your knowledge to people like me. How I wish to go back to School but I am retire at 70 yrs old now. I save money cause of your Channel. Bravo

[@andresbatacan463]

Here in Canada

[@carlos_sacalul]

Hi,Any idea? I put 230v on 230v output of my inverter,when this was on power.I broke my inverter like a foul... thanks man

[@zaneenaz4962]

Nice presentation. Thanks

[@petniyi35]

irf 1404 is very common in my area. can i use for inverter design please?

[@ibrahimozylmaz9780]

irf1404 40 volt 162 amper sadece giriş anahtarlaması için 24 volt giriş için uygun daha fazla voltajda patlar .çıkış frekans bölücü için kullanılmaz . irfp450 gibi özellikleri olmalı

[@ibrahimozylmaz9780]

irf1404 40 volt 162 amper sadece giriş anahtarlaması için 24 volt giriş için uygun daha fazla voltajda patlar .çıkış frekans bölücü için kullanılmaz .çıkış için irfp450 gibi özellikleri olmalı.yani ortalama 10 -20 arası akım verebilen en az 500 volt mosfet kullanmalısın

[@aravindadas567]

is the pure sine wave module is available. for output stage mosfet driving?

[@PhdHung]

I think it can be replaced with EGS001

[@aravindadas567]

@@PhdHung can i make 2000 watt, this type of inverter, diy.??? why in those inverter use two transformers?? is it not possible to make in one transformer. i saw the outputs of those transformer coil is in series. can i use one transformer for 2000watt output ac volt???

[@ButelabaBobRoberts]

Good work thanks for the video

[@zayarlwin9340]

Good technician

[@timmylatoja6834]

I have a 12 volts 1000 watts tbe inverter, the output is 289v. How to fix this sir?

[@fury4076]

Bro, Im excited for your Silver playbutton 💓

[@PhdHung]

[@fury4076]

@@PhdHung Bro, I bought Mt7601 and in the datasheet its operated by 3.3V . I supplied 3.3V but not work, can i use 5v? I bought the one that you search in the net in the video of wireless camera

[@jamess1787]

Sorry I'm late! What do you think caused the problem? Reverse polarity? Or over current? Is it really 2000W?

[@josepeixoto3384]

no 2000 watts,no way; less than 1000, maybe 700 W; maybe;each one transformer is only about 500 watts,tops.

[@milvolts1]

Beautiful and straight forward repair. I burned a track from the on off switch of a 1500 pure sine wave. I was trying to attach an external switch for a battery generator project. Any way I reattached the track and I only get fault light to come on. No fan or power to the inverter. I did notice heat coming from pwm module ic. Could that be my only remaining issue? Thanks a bunch

[@fbi-federalblyatofinvestig3853]

Yes probably but make sure to check mosfets, capacitors, resistors etc.

[@netrapalsinghprjapati1935]

Nice sir👍

[@PhdHung]