Potential of passive feedbacks to reduce dynamic current imbalances of paralleled IGBTs

摘要

This paper analyses the improvements in dynamic current sharing of paralleled IGBTs that can be achieved by passive feedbacks. During parallel turn-ON and turn-OFF, various asymmetries can lead to current mismatches. To avoid deratings, those mismatches have to be reduced, and passive measures regarding the gate-drive are a cost-efficient way to do so. However, not every passive measure has a reducing influence on current imbalances of every cause. Therefore, this paper investigates which passive measure can reduce which kind of current mismatch.