Single Board Inverter IGBT Welder Machine - Function & Troubleshooting

Watch in English Language https://youtu.be/1XPzV0sXOckWatch in Urdu / Hidi https://youtu.be/rnfh9Q0uP50in this video in this video i explained the working principle of single phase / 3 phase, Single Board / plate / circuit card Inverter IGBT or MOSFET, Welder Machine mma 200 / 140 ampere. - Function & Troubleshooting, i demonstrated how to troubleshoot, test and repair igbt dc inverter welder / welding machine.this china MMA Inverter IGBT Welding Machine 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.then these voltage are switched into pulsed dc voltage to drive the primary of the high frequency power transformer, which drives the output schottkey rectifier diodes, which provide the output for weldingall function is controlled by inverter control board, sg3525 is used to control the pulse width for current mode circuit, low voltage power supply is used to power up the circuitafter watching this video you will learn:-how to #repair #inverter #igbt #welding machine or welder2. functional description of inverter igbt welder machine3. how to troubleshoot arc welding machine4. how to understand mma-200 circuit diagram and how it works5. if welding machine does not work, how you will repair6. if main circuit breaker trips off when power switch is turned on7. over current OC LED light turns on