Example of an AC bus bar for parallel connection of three EconoDUAL
Dynamic operation refers to the power electronics component turning on and off. The
higher the switching frequency of the IGBTs, the greater will be the influence on the
overall system of the dynamic current balancing. This can even progress to the extent
that the switching frequency for hard switching is so high that static influences play only
a very small role in the balancing of the currents. The key factor in optimising dynamic
current distribution inmodules connected in parallel is the design of theDC-bus and the
IGBTgate driver stages. Thegoal in this case is:
To make the stray inductance in the commutation path of each module
Tomake the turn-on and turn-off times of all paralleled switches identical.
The smaller the discrepancies between the stray inductances and the gate driver
parameters, the better will be the current distribution during turn-on and turn-off.
is a protected trademark of InfineonTechnologies.