The basic function of IGBT in inverter is as a high-speed contactless electronic switch.
Working principle:
Using the switching principle of IGBT, using the control circuit to give appropriate on and off signals, IGBT can convert DC into AC according to your control signal, and the voltage will be reduced after DC is converted into AC. For example, the 600V DC of train power supply system is rectified by 380V AC, and the function of IGBT inverter drive board is to restore this process. At the same time, the current can be controlled by adjusting the pulse width of the control signal, and the AC frequency can also be controlled, thus controlling the speed of the motor.