Patent ID: 11916545
Assignee: SIEMENS AKTIENGESELLSCHAFT
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method for operating a self-locking or self-conducting power semiconductor element, the method comprising:
measuring a test drain source voltage occurring with a test switch-off gate voltage and a test reverse current between a drain terminal and a source terminal of the power semiconductor element;
determining a variation in the test drain source voltage from a reference drain source voltage as a threshold voltage change, said variation occurring between the drain terminal and the source terminal with the test switch-off gate voltage when a threshold voltage of the power semiconductor element matches a reference threshold voltage;
determining the threshold voltage change in the threshold voltage of the power semiconductor element in relation to the reference threshold voltage; and
changing a switch-on gate voltage, which is applied between a gate terminal and the source terminal of the power semiconductor element for the purpose of switching on the power semiconductor element, by the threshold voltage change in relation to a reference switch-on gate voltage corresponding to the reference threshold voltage.