infineon NPT-IGBT控制

infineon NPT-IGBT控制
The Reverse Behavior of the NPT-IGBT in its On-State

1 Reverse States of the IGBT in Inverter Circuits

Causes for Reverse States
The use of the IGBT in inverter circuits does not come without its problems. During the
switching cycle the signs of current and voltage applied to the switching device change
temporarily caused by the inversion of the flux of energy between supply and load. The IGBT
has no provision for carrying negative voltages, therefore it must be terminated with an
antiparallel or a series diode. However, it is not possible to completely suppress transient
reverse states of the IGBT, which are caused by the transient behavior of the diode (which
shows forward and reverse recovery) and are also due to parasitic inductance within the
circuit. Character and effect of the