Can CONCEPT drivers be used for direct series connection of IGBTs?
In principle, CONCEPT drivers with multilevel capability (see also FAQ on this topic) can be used for series circuits. However, the following points should be noted: even with synchronous driving of series-connected IGBTs, due to parameter fluctuations of the IGBTs, symmetrical voltage division and voltage limitation can only be achieved by additional measures, such as dv/dt limiting, active clamping or snubbers. Another problem is the necessary high insulating strength of the drivers power supply. For larger volumes, CONCEPT also develops customer-specific drivers.
