Chopper circuit IGBT

Although the internal working mechanisms of switching devices are different, for the analysis of the snubber circuit, only the external characteristics of the device need to be considered. When the IGBT is turned off, the model can be equivalent to a voltage-controlled current source, and when it is turned on, it can be equivalent to a voltage-controlled current source. Voltage source. The chopper shown in the figure is a model of a general IGBT snubber circuit.