{625} Why NTC or PTC Thermistor Damage in Inverter Welding Machine / Inverter AC Outdoor Unit
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- เผยแพร่เมื่อ 20 มิ.ย. 2024
- Why NTC or PTC Thermistor Damage in Inverter Welding Machine or Inverter AC Outdoor Unit, i discussed all the possibilities for blast / damage / failure of ntc / ptc thermistor.
Download Schemet of the Resanta inverter welding Machine SAI-230AD,Схема сварочного инвертора Ресанта САИ-230АД
bit.ly/3xASWkA
main indications symptoms for this problem are:-
1, input ac circuit breaker trips off
2. ntc or ptc thermistor damages /blasts / opens / when turning on
3. welding machine or inverter ac circuit not workign
3. it fails to turn on the machine
its possible reasons are:-
1. IGBT / MOSFET damaged / short circuit
2. Low voltage power supply MOSFET damaged
3. dc capacitor / smoothing capacitor internal short circuit
4. bypass relay failure (if the contact arm is damaged internally due to sparking or arcing and it cannot close the circuit)
Basics of NTC and PTC Thermistors
Thermistors - NTC & PTC - Thermal Resistors
Understanding How NTC & PTC Inrush Current Limiters Work
its basic use is in inrush current protection circuit / surge current protection circuit. it limits the initial charging current for the bulk capacitors, smoothing dc capacitors. when the dc rails charges up to a safe voltage range i.e. the dc capacitors attain its safe dc voltage at that time a bypass relays, bypasses this ntc or ptc thermistor by closing its contacts.
ntc or ptc are from the thermistor family
what is thermistor is material, its resistance changes with change in temperature
what is PTC is positive temperature coefficient thermistor, its resistance increases with increase in temperature
what is NTC is negative temperature coefficient thermistor, its resistance decreases with increase in temperature.
these both components are used in inrush current protection / current surge protection circuit.
#electronicscreators #inverterweldingmachine #inverterac
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الله يعطيك الف عافية
الله يسلمك و یسعدک و یبارک فی عمرک
باسلام
ازتماشای ویدیوهای بسیار مفیدشما گاها استفاده کرده لذت میبرم .باتسکرهمکارشما
This was an excellent video - very well explained. I had a shorted capacitor that was heating up the thermistor rapidly - pretty much exactly as described. When I took a suspect IGBT off the board it tested faulty and the machine turned on. Superb, thank you!!
Absolutely impressed by your simple way explaining this PTC function and fail . I will definitely check the other components. Thanks a million.
it is my pleasure
please accept my best regards ans special thanks for your beautiful encouraging comment
Exelente video, retire los IGBT y la máquina encendió 💯
Perfektne vysvetlené ďakujem.
Pozdravujem zo Slovenska
Excellent as always. Thank you for all you do.
My pleasure!
Very well explained and easy to follow thank-you 😁
You’re welcome 😊
I’ve had to repair so many of these for clients. I normally only do industrial repair and metrology related stuff for big factories and research labs…… but a lot of Friends/acquaintances/customers have bought one of the smaller cheap machines to weld at home or to start learning. I’ve been impressed with the quality of even some of the cheapest machines. I think they are perfect for most people, it’s just important to remember a few A few things.
If the machine does not have a proper System to monitor temperature and cut out…
A lot of new people who are learning don’t understand about proper “duty cycle.”
So the most important thing….. is that if you have a smaller cheap welder and it does not have MULTIPLE points of thermal monitoring and cut out, you can still do something about it and make it a lot safer.
Just buy one of the cheap $5-$10 thermal cut out power/outlet adapters on eBay….. and plug it into that first so that if it does overheat, it will cut out before it starts to explode.
Just place the thermistor/temperature sensor in the welder at the hottest place inside the welder which is usually somewhere around the heat sinks and bulk capacitors.
Some of the ones available on eBay and Alibaba have two or three different temperature monitoring sensors that come with them. Giving you the ability to monitor the temperature at multiple places inside the machine. And then it will cut out automatically so that you don’t have to worry about constantly watching your duty cycle/welding time. Because if it doesn’t have a way to monitor the temperature and cut power, and you don’t watch the proper duty cycle and thermal management REALLY CLOSELY, it will make a very loud bang and smoke for a little bit. Hopefully it won’t take out half of the circuitry inside and it will be repairable but it’s just easier to monitor the temperature from the beginning
really great and valuable points for equipment safety
actually, many manufacturers who don't care abut their brand name's reputation OR some cheaters produce low quality items with some known brand name,
which causes the loss for the end user. it is a huge loss for equipment and it oversees the human safety
otherwise, at production level, if all safeties and protections are incorporated, that will make it long life and safe
👍
@@HaseebElectronics 👍
Very informative video, I learned a lot of logical troubleshooting approach on SMPS from you thru your videos. Keep it up and you just earn another subscriber from me.
Subha Bakher Ho Janab Bhai Saab
thanks a lot bhai
Sir, Namaste So kind of You for Adding a Knowledgeable Video .. with Regards,,.. Sreekanth, Hyderabad- India
thanks a lot dear brother 💗
Barak allahw fika brother
Very informative vedeo. All videos are very informative and nicely explained. God bless you. Thank u so much.
It's my pleasure
Wow amazing beautiful shirng dear friend 🌹👍
Excellent explain well done, good luck 👍👍💕
thanks a lot
Thank sir , i learn a lot from your video
Great teacher, I have been watching your tutorials for long and I have learnt from you. Please sir what makes igbt to burnt when replaced in welding machine
Wow that's awesome excellent uploading great job best wishes super Like your great skills work good morning 🌅🌻🌹
thanks a lot
thanks for the video, very interesting.. greetings from Croatia!!
GOOD TICHING KARTE HO AP THANKS 👌🌹👌🌹😆😂😆
Wonderful video dear friend!!!
Many thanks
جزاك الله خيرا شرح جميل جدا.
Very good and useful information sir thanks for sharing this knowledge to us
So nice of you
thanks! ..please do more videos about welding machines repairs
sure i will try to do more videos
I love this channel
Excellent explain thanks for sharing this informative video bahi
Always welcome
Hello friend, what value of NTC thermistor for welding inverter is used?
Thank you very much sir 🙏🙏🙏
Most welcome dear ❣️
Salam alykom haseeb thanks for the videos, i have a problem once i start welding i see the first spark and yellow light turn on ( over heat protection) the machine had a faulty igbt i changed them and fan is working again. Can you point out how to test the overheat circuit or do you have a video for it? When i restart the yellow lights goes off bit again first spark then it turns on.
Great jobs,
best regards
Good video, thanks mate
it is my pleasure
Good video
Good sharing bai
Many many thanks dear sister
Thank you a lot of amazing and wonderful 💐 please please
Thanks and welcome
Have a nice day best job
بہت شکریہ
Good topic 👍👍👋👋
best regards and lovely thanks dear friend
informative video, many thanks sir :)
best regards
Excellent and very useful sir
Thanks and welcome
Very good video!!
Thank you very much!
beauatiful sharing
Thank you so much 🙂
Good topic
it is my pleasure
Hi Mr ,
I have a question ، i placed an ntc thermistor in a wheatstone bridge , and it gave me a totally non linear curve including a negative voltage ,it goes like
0°=4V , 10°= 3.5V , 20°= 1.5V , 40°=0.5V , 60°= -0.5V , 80°= -1V ,
100°= -1.2V
So how can I make it linear to complete the process of display it and so on .
Very useful video sir
most welcome
Sir well job keep it up ❤
Thanks a lot
stay blessed
وعليكم الف سلام -- شكرا جزيلا--
thank you a lot wonderful
Most welcome
Great video! But where can I find those schematics?
I hope you will translate all the videos. For everyone to understand
I will try to add translation
ان شاءالله
Check haseeb electronic urdu
thankful🙏🙏🙏🙏🙏
best regards
ماشاءاللّٰه sir
Sir 3 phase make video over inverter
okay brother i will see it
Excellent explanation. So if low voltage supply is not working then capacitor will not reach full charge, or if NTC or PTC blows open nothing will work, if ntc or ptc go short then other parts will be damaged.
If low voltage power supply stops functioning
The bypass relay will not turn on and all the current will pass through ntc / ptc
Which will cause to blast ptc (if there is ptc then its resistance will increase while the resistance of ntc will decrease with rise in temperature)
In both cases the ptc / ntc may damage
In upcoming sereis of welding machine repair i will try to cover all possibilities in full details
Hello sir, pls can I get this circuit diagram?
Sir please I have a question what will be the fault of if you want to plug inverter welding in electric it will bridge immediately
Please what to trouble shoot if voltage is not getting through from bridge rectifier
Good tutorial thanks for sharing but I have a challenge on how to calculate the value of the capacitor usually placed between the heat sink of every full bridge inverter and what is their function and some times you see four of them kindly explain in detail
@@HaseebElectronics okay sir please check I really need and that of half bridge inverter calculation
@@HaseebElectronics sir I have another challenge on how to select the value of NTC thermistor and also when do we use either PT. or NTC thermistor. Thanks
i wait for your video
yes brother
i will arrange it very soon.
إن شــاء الله
May Allah Pak bless you جزاک اللّٰه
Assalamualaikum sir.
I have an inverter welding machine when turning on after a while the ptc heats up and the machine turns off then keeps turning on and off. I checked most parts of the circuit I didnt find any short circuit niether the mosfet nor IGBTs. I dont know what is the reason for this heat up ptc( 115 ohm ). I replaced the relay but same. The bypass circuit is before the bridge rectifire it works properly. The machine output is ok when turning on. I tried to replace this ptc with ntc it worked properly but after several time turning in and off the ntc blown up
Sir if you can help
I have mechanic icharge 8 max not working, i find NTC burn, i dont know the model number i can replace! How i can find correct NTC?
How do order the smd transistor A4GG ?
Sir sine wave inverter kistarase Kam karte he details video chahiye
👍
Please make video on power supply why my DVDsony DAV DZ 151kb power supply is given over voltage on one pin in place of 6 i have found 8 .2 volt and when I connect connector with mother board my 3.3 volt is missing and voltage of 6 volt which is 9 volt in my MOSFET is drop half
❤
Excellent
Thankyou
Are you engineer?
Yes I am
Mashallah
الحمدللہ
ما شاء الله
thanks a lot
👌👌👌👍
best regards
🇹🇷Es Selamun aleykum ve rahmetullahu ve beberakatuhu. brother.🇵🇰🇵🇰🇵🇰
وعليكم السلام ورحمة الله وبركاته
Lk 56 brother 👍👍
thanks a lot dear sister
Ok❤❤❤❤❤iran
Sub. 👍. My ntc green is 3 ohm and on caps only 160v .what issue ntc?
220v system
it depends on ambient temerature, current rating, chip size, capacitor size
Asslam o Alikum Sir
Any video available (5000W inverter detail Circuit) or any docx file.
Plz Kindly I need 5000W inverter circuit video or docx file
😊👍🙏
it is my pleasure
Plz Sir Kindly share the Circuit file
Assalamo alaykum warahmatullah alaykum,sir once have send me ackt diagram of Acer monitor to me i lost it pls make me study about fault finding procedure as well with ckt daigram.
Hasseb भाई हिन्दी मे भी वीडियो डाला करे जो आपकी इंग्लिश chennal मे है वो सारे
हां भाई हर वीडियो शेयर कर रहा हूं, कोशिश करूंगा कि रोज दोपहर 1:00 बजे शेयर करूं
Hi man i need your paper ..i mean your welding diagram . Can you converted to the pdf file . And share it
Pls
سلام استاد. آیا میشود که این مدار را قرار بزارین تا بشود ما هم داشته باشیم. همان شماتیک ماشین جوش را میگویم
ممنونم استاد بزرگ
السلام عليكم ورحمة ٱلله وبركاته
بله برادر من نمودار را اضافه کردم، لینک در توضیحات ویدیو است. لطفا توضیحات ویدیو را بررسی کنید و آن را دانلود کنید
@@HaseebElectronics سلام استاد عزیز. نتوانستم یافت کنم لینک دانلود را. آیا من اشتباه میکنم؟ لطفا مشخص کنید کدام لینک هست. منظور من شماتیکی هست که در ویدیو دیده شده است. بسیار ممنون از اینکه به ببیندگان خود پاسخ گذار هستین
bit.ly/3xASWkA
لطفا اگر دانلود کردید جواب بدید
@@HaseebElectronics سلام استاد. بله توانستم دریافت بگیرم . خیلی توجه دارین . ممنونم
السلام عليكم هل يمككنني التواصل معك؟
و عليكم سلام و رحمة الله و بركاته. كل عام و أنتم بخير.
نعم ، رقم واتساب 00962791161084
و gmail هو ashraf4ta4
@@HaseebElectronics وانتم بالف خير عيد سعيد علينا و عليكم
Hello Sir I'm your follower of welding machine reaper can you send of schematic diagram of yamato MMA 300 and the others machine in my email
pagol khana
Hello sir, pls can I get this circuit diagram?