Stable Paralleling of IGBTs

Based upon this discussion related to current balancing of paralleled IGBTs, there are a few different options.

1. Use Field-stop IGBTs, which naturally balance current.

2. Use NPN IGBTs, which start to balance at higher temps and consider actively controlling the PWM duty cycle to prevent current hogging.

3. Use Punch-thru IGBTs, which are unstable at all temperatures, but actively control the PWM duty cycle to prevent current hogging.

In each case, make sure they share the same gate driver, have the same gate resistors, and reduce wiring lengths.

Here is an interesting flyback diode.