{292} Inverter Welding Machine Repair Course / How To Repair Inverter IGBT Welding Machine
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- Опубликовано: 16 сен 2024
- Inverter Welding Machine Repair Course / How To Repair Inverter IGBT Welding Machine #Welding #Machine / Input Rectifier Circuit Explained & Troubleshooting. i discussed the circuit diagram and how to repair mma-200 or mma200 mma250, mma160 and troubleshoot inverter IGBT based welding maching. this china MMA-200T Inverter IGBT Welder Machine - Circuit Explained & Troubleshooting Part -1, is single phase 220 VAC operated. it have a bridge rectifier which rectifies the main ac voltage into dc voltage, which are connected to pair of dc capacitors through a relay contacts and in parallel 110 ohms ntc resistor. this nts protects from inrush current and upon receiving relay drive signal it switches the rectified voltage to capacitors so, the ntc is bypassed to get full current to drive igbt.
after watching this video you will learn:-
how to #repair #inverter #igbt #welding machine or welder
2. functional description of inverter igbt welder machine
3. how to troubleshoot arc welding machine
4. how to understand mma-200 circuit diagram and how it works
5. if welding machine does not work, how you will repair
6. if main circuit breaker trips off when power switch is turned on
7. over current OC LED light turns on
To watch Part 1 • {286} Inverter Welding...
Part 2 • #287 nverter IGBT Weld...
Part 3 • #288 Inverter IGBT Wel...
Part 4 • {289} Inverter IGBT We...
Part 5 • 291 Inverter IGBT Weld...
Part 7 • #293 Inverter IGBT We...
in this video i explained the circuit and basics working theory of igbt mma welding machine for single 1, 3 three phase china, arc inverter igbt mosfet welding machine. it receives ac voltage rectifies it into dc volatage, which pass through ntc and charge the capacitor, now low voltage power supply having SD6834 / SD6832 Current mode SMPS PWM controller converts into dc 25 voltage. which are applied to main relay, fan and further to 7815 15 volt and 7805 +5 volt regulator.
15 volt are applied to universal control card having SG3525 or TL494, SD7500 which generates 46KHz frequency to drive signal transformer. then that signal is processed through pulse forming to drive the igbt mosfet gate driver. igbt or mosfet switch the main dc voltage to high frequency power transformer. the induced voltage in secondary of the transformer are rectified through fast rectifiers and provided in output welding electrodes.
the current sense shunt is used to measure the current in the output and it is monitored at control card, and it controls the drive pule duty cycle.
the required current is adjusted and fed to pwm controller ic.
video is narrated in urdu / hindi language and how to repair and troubleshoot inverter IGBT based welding machine. it is titled Inverter IGBT Welder Machine (Part -4) Low Voltage SMPS Circuit Explained & Troubleshooting because this power supply is to convert +330vdc to low voltage 25VDC.
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ma shaa Allah another informative video. thanks for sharing. stay blessed
Jazak Allah dear brother 😍
Excellent! Haven't come across any other video with such a detailed description of how an inverter welding machines work. Thanks
it is my pleasure
Waalaikumsallam wabarohmatulohi wabarokatu
thanks for sharing my brother
semoga sehat dan bahagia selalu
thanks a lot dear brother
Thank you very much for taking the time and trouble to show how this circuit works, it is much appreciated..🙂
You are welcome!
What a great series this has been. Much better inderstanding of the inverter power supplies of all types as a result. Many, many thanks for your time on this. Now, coincidentally, I have a complicated TIG welder on my workbench that is dead as a doornail that I need to fix.
Very smart my brother 👊 God save you give you super 👍 good luck
This man is so kind and helpful. He is probably busy but he answers and helps every time I ask for help.
best regards
yes you are right, these are much busy days
please accept my best regards
Thank you so much brother. Never seen before. Detailed explanation. Many things are clear now. May God bless you.
السلام علیکم
Thank you so much for your valuable &helpfull videos جزاک الله و خیرا
Fully watched awesome excellent informative vedio big thumbs up thanks for sharing stay blessed always be happy good morning have a nice day
Great working description of the individual components and their function/purpose in the circuit.
Thank you!👍
Excellent define IGBT inverter great informative video thanks for sharing
thanks a lot
Hello! I'm from Brazil, and I'm trying to understand the video, because I don't speak English. I'd like to understand why the retification from chopper-out is made with one diode and one capacitor only? Thank you, I'm watching your videos! Good LUCKk
good luck my friend🙋♀️👍
Informative as always,I believe myself lucky to have a teacher like you .
thanks a lot dear brother
Best work for all how the this work information Love You..
Many many thanks
There is a high science in this simple video many points to understand..haseeb is a super master igbt is high current sw
Great teaching. 🥰🥰🥰
thanks a lot
Best explanation. Thanks for your hardworking, dedication. May God bless you
best regards
Perfect professor.
Thanks a lot
De nuevo felicitaciones por tomarse su tiempo para ofrecer tan interesantes clases muy bien detallada y fácil de entender se agradece muchísimo...saludos desde cali Colombia
gracias especiales y los mejores deseos
thank you sir watching your video clear explanation .
Lk 111 keep going 👍👍😊
Thank you so much
Good information.
MashaAllah good work.
Great video! Thank you!!
Very good explanation , thank you sir
You are welcome
Hello Haseeb. Thanks for a great series on the IGBT welder. Please can you explain what the difference is between PWM in a smps power supply and PWM in a welding machine. In a smps power supply, the duty cycle is adjusted to change voltage, but keeps the current constant. In the welding machine, the duty cycle is adjusted to change the current, but the voltage stays fixed.
best regards
in smps power supply, there are two types,
1. voltage mode smps power supply (in this smps the pulse width is adjusted to maintain the output voltage, and the current level is maintained using vcc voltage from bias winding)
2. in current mode smps power supply (current flowing through the mosfet / driver transistor is measured by means a current sense shunt resistor connected in series with mosfet and primary winding of the transformer, while the voltage level is maintained using optocoupler)
in welding machine
the output current is measured using a series shunt resistor,
regardless to the output voltage, the current is maintained (even the voltage will drop to minimum voltage around 1 volt or less, for example)
output current value is translated into relative voltage, and it is compared with our required current (set by the front panel current adjustment pot)
then the resultant value is applied to the pwm controller to adjust current value
@@HaseebElectronics Thanks very much for the explanation.
Thanks for this great information
My pleasure
Mashallah nice video....
Great job very interesting thanks share 👍😍
well explain haseeb nice tutorial and sharing
Many many thanks
Nice sharing 👍👍❤️❤️ like 👍👍
thanks a lot dear sister
Very well explained, thank you. Do you know why there is a driver stage between IC and IGBT and IC is not controlling IGBT directly?
thanks a lot
yes
there is signal amplifier stage between pwm controller and the igbts
Très bien merci 👍😉
thanks a lot
Welcome to a welder who works as a normal welder and does not work as a torch welder
Hello. Your videos are amazing and informative.
I just want to ask as to what might be the possible faults in our arc inverter welding machine. The machine turns on normally and the output voltage is 40-50 V when measured with a multimeter. However, when we begin to use it (at the instance that the electrodes touch the metal) the O.C. light turns on and there will be no output to the machine.
I hope you can answer.
Bhai eleven. Hwru brother 🙏accha explanation
Very niceee video 😍
السلام عليكم
عند تحديد التيار هل المعالج يغير التردد او يغير زمن التوقيف وزمن التشغيل الترنسستورات ، من خلال التغذية الكعسية
i am not muslim, but i say May Allah (PBUH) bless you my friend
thanks a lot dear brother
special thanks for your valuable pray,
God bless you and your family
Very interesting. Thanks.
best regards and special thanks
Nice 1
Hi. The soft starter protection from inrush current work only once time when the welder become power?
yes. the NTC will used only during starting to protect the input circuit from excessive inrush current. after that the relay is interlocked for routine operation
imagine if this guy can speak straight english. Well I think I can build my own inverter welding by now. Explanation was clear even by using not his own language.
wow. it is my pleasure and i am thankful for encouraging my efforts
please accept my best regards
Welcome. Question Please I own a Fronius 150 pocket welding machine. If you run the machine. It says E04 on the screen then disappears and solders normally. The meaning of the symbol in the machine book. Open circuit voltage not reached:
Electrode in contact with workpiece/hardware fault
Remove the electrode holder from the workpiece. If the service code persists, should I submit it to a repair technician or does it just need to be updated?
nice.thats it.i can see.
how it works.hi 5
Thanks 👍
Best sharing
Can you please explain me how output voltage is regulated I see only output current we have control to regulate. Thanks
Good Afternoon my Dear Brother Have A Nice Day
Can I use igbt in place of a mosfet?
Bonne explication. Pouvez-vous publier le schema détaillés avec les valeurs des composants électroniques !
How to calculation this type smps trx ,like 155v or 300v ?
And its bloking cap value ?
I never seen this type inv calculation yet,
Beautiful share, well explained like always, keep it up bro.
Thanks a lot for this tutorial. Will there be a similar instruction for Plasma Cutters? There are a lot of instructions on the web for welding - repairs and almost nothing for inverter Plasma Cutters.
I do not understand how the amp setting works on welding machine . which pin of sg3525 is is used for this function?
no
problem i will explain it in detail as soon as possible for me
Lk 49 superb job✌👍👌
Nice tutorial education.. Thanks sir🙏
thanks a lot
THANK you sir
Sir why to use such huge circuit... If we want output volt as dc volt or ac volt of just 24 or 40 then y not use stepdown transformer in making welding machines??
transformer cannot produce so huge amount of current.
this machines are reducing the size, power consumption and reducing the price
Excellent knowledge.
So nice of you,
if you are interested in urdu/hindi, then you can find my all videos in urdu language on my other channel (haseeb electronics urdu)
@@HaseebElectronics Very informative videos. Subscribed.
@@sureshlingabathina thanks bhai
Lk 31 good job 👏👏👏
Hello, I have an Telwin force 195 inverter and keeps burning the rezistor. I changed bridge rectifier and relay and still result. Can you help me. Thanks.
welcome brother
you did not mentioned, which resistor is burning out.
if it is at input (inrush protection resistor) in parallel to the relay
then the relay may be damaged.
waiting for your reply for telling, which resistor is burning out?
@@HaseebElectronics Yes this is the resisor. I have already changed the relay, rectifier bridge and i have put a bigeer resistor and now one of the big capacitor have exploded.
Aoa sir mary Welding machine ki igbt Repair krny kah bad be igbt blast kr jaty hn resistance change krny kah bad be
Daer Sir, very good explanation. Can you give advice what type of components make a good welder. Which parts are crusial and need to be of very high quality. Best regards, Maarten.
most critical components are
IGBT / MOSFET
Output Rectifier
Control Card
smps IC (in low voltage power supply section)
bypass relay (in rare cases)
Asslamu slyikum sir how are you.. sir how much volt required on gates of igbt s.
I mean driver output voltages
How much?
Thanks for your video. Can you tell me if 105V open circuit voltage on the output is ok or not because some people say that anything more than 90 is not ok? Does checking the output by touching + and - with a piece of insulated wire cause just a spark or cause a short circuit and blown igbts?
welcome dear.
105 volt output is very high,
it can increase over voltage stress on IGBT/MOSFET (and igbt/mosfet may damage)
check control card, may be it is creating ore duty cycle with no load, if it generating more duty cycle, you have to set current setting / current feedback circuit
@@HaseebElectronics Thank you very much for replying. There is a problem definitely. Do I set that circuit via potentiometers which are near control card?
@@zlane71 exactly,
Set current potentiometer to minimum on front panel
connect oscilloscope to the output section of control card and
try to set minimum duty cycle at no load by means of current limiting potentiometer on control card
So it will increase its duty cycle when the input current potentiometer is set to different current limits
@@HaseebElectronics Thank you very much, indeed. You are a great man. You dedicated your precious time to me.
I am an amateur, hobbyst, trying to help my friend, already replaced 2 blown igbts(there are 4), now it is not dead any more😄 but uc3846dw gives 6.6v instead of 5.1v on the output according to datasheet. I will possibly solve that problem by following your instructions using pocket oscilloscope ds212 which can handle 40V. I have to find out where the output of the card is. Can I use the output of this chip uc3846dw? There are two potentiometers for 2 channels and outputs on pins 11 and 14 (12 is gnd). In your other video you said to set duty cycle to 50% for both channels. What percentage is good in this case?
SMD IGBT CNTROL CARD KE LIYE VIDIO BNAIYE IC VOLT BHOT JRURI HYN
My welding not adjusting bro the pot is good
Inverting a pwm signal I try it’s work but the oscillation ic need 15 volt to get good inverter voltage for low side driver the peak valve is the bigger issue if the duty cycle is turn don’t the high will drop to 5 volt and the low will go up to 13v I don’t like this design too much issues with driver the igbt in a sti
sir single board IGBT inverter welding by Singh volt kitne hote Hain
What pin of 3525 is connected to sense bro?
pin 1 or 2 are connected to sense line. selection of pin 1 or 2 depends on output polarity
pin 1 is inverting
pin 2 is non inverting
@@HaseebElectronics btw what is the bhd smd transistor value
Off line kaise sekh sakte hai sir
Can we say that igbt make dc volt to ac by switching so transformer will work...???
exactly perfect
we apply pulses to the gate of IGBT and igbt allows to flow the current in transformer primary winding in that period and when the pulse is in off period, the igbt will stop current flow in the transformer. so current will keep changing in the winding to create changing magnetic field to produce voltage in secondary side
How can i join your class sir guide me..
Total circuit diagram ple..
Sir my inverter welding has highvoltage output.it has 100+vdc.how to control output voltage and set to its limits?
please adjust its duty cycle.
there is current limit trimpot. try to adjust it
or
try to decreasing switching frequency
or you can remove 1 turn from both portions of secondary, if possible
There is something wrong with the igbt gate oscillator transformer, between pin 1 and pin 3 is to IGBT mosfet😀
actually the triggering pulse is provided to gate. and gate and source
so gate drive section must be configured properly. because gate components for igbt and mosfet are different
and if transformer have high output pulse then it can also make issues
yes I understand that but the schematic you described is wrong with pin 1 and pin 3. pin 4 should be on pin 3 as a low side mosfet gate. pay attention to the start of the winding and the end of the transformer GDT winding. if you continue to use this scheme, it cannot be used on the SMPS Halfbridge, but it will only be used on the SMPS Flyback Double Mosfet sir😀
🔔🔔🔔
😍😍😍
👍👍👍
best regards
can you send me full diagram. in messenger
thanks
kindly send Whatsapp message to
00962-79-1161084 I will send it
Sorry
what happened my dear. why you write sorry.
it will my pleasure, if you point out the issue,
please accept my best regards
Hassab bhai three Phase make video Compled datasheet and information Please. WhatsApp # Please Pakistan
my whatsapp is 00962-79-1161-084
Great series!
it is my pleasure
Excellent define IGBT inverter great informative video thanks for sharing