Method for operating an electrical power rectifier, and an electrical power rectifier

摘要

Disclosed herein is a method for operating an electrical power rectifier (10). The power rectifier (10) comprises at least two branches (11, 12, 13) that are connected in parallel to each other, each of said branches comprising at least two power semiconductor elements (14', 14") that are connected in series. The collector-emitter voltage Vce(t) and/or the collector current Ic(t) of one of the power semiconductor elements (14', 14") is detected by means of the method. Furthermore, it is determined whether at least one of the following conditions is met: dV CE (t)/dt (dV CE /dt) crit and/or dI C (t)/dt (dI C /dt) crit and or I C (t_ent) I Ccrit . If at least one of the aforementioned conditions has been met, the gate-emitter voltage of at least one of the power semiconductor elements (14', 14") is increased.