Abstract: The invention relates to a protection for a semi-conductor switch against over voltages. A capacitive element is provided on an inlet connection of the semi-conductor switch. The load amount, which flows into said capacitive element, is integrated in order to trigger a protection function when a threshold value is exceeded.

Abstract: The invention relates to a circuit arrangement (100), comprising a control circuit (104) and a switch element (101) for switching between a first and a second switching state of the switch element (101). The control circuit (104) is designed to provide a variable pre-control voltage dependent on the switching state of the switch element. The pre-control voltage is a voltage that is switched as the control voltage at the switch element (101) during one of the two switching states. The control circuit (104) is also designed to vary the pre-control voltage during each of the switching states.

Abstract: The invention relates to a circuit arrangement (100), comprising a control circuit (104) and a switch element (101) for switching between a first and a second switching state of the switch element (101). The control circuit (104) is designed to provide a variable pre-control voltage dependent on the switching state of the switch element. The pre-control voltage is a voltage that is switched as the control voltage at the switch element (101) during one of the two switching states. The control circuit (104) is also designed to vary the pre-control voltage during each of the switching states.

Abstract: The invention relates to a protection for a semi-conductor switch against over voltages. A capacitive element is provided on an inlet connection of the semi-conductor switch. The load amount, which flows into said capacitive element, is integrated in order to trigger a protection function when a threshold value is exceeded.

Abstract: A protective device for protection of a semiconductor switch against overvoltages during a deactivation process. A compensation signal is provided at an input of a driver stage for a semiconductor switch to be deactivated if the voltage at the output of the semiconductor switch exceeds a specified threshold, and simultaneously a request to open the semiconductor switch is detected at an input of the driver stage for the semiconductor switch. The compensation signal is limited to a specified duration. On the basis of the compensation signal provided in the aforementioned manner, the driver stage for the semiconductor switch partly controls the semiconductor switch in order to prevent an excessively quick opening of the semiconductor switch.

Abstract: The invention relates to a circuit arrangement (100) for the temperature-dependent actuation of a first switching element (S1), comprising an input terminal (EA) for accepting an input potential, an output terminal (AA) for transferring an output potential to a first control terminal (G1) of the first switching element (S1), and a temperature-dependent component (RT) which is connected between the input terminal (EA) and the output terminal (AA).

Abstract: The invention relates to a circuit arrangement (100) for the temperature-dependent actuation of a first switching element (S1), comprising an input terminal (EA) for accepting an input potential, an output terminal (AA) for transferring an output potential to a first control terminal (G1) of the first switching element (S1), and a temperature-dependent component (RT) which is connected between the input terminal (EA) and the output terminal (AA).

Abstract: The invention relates to a method (10) and to a device (ALE) for operating a switching element (LHS), said method comprising the following steps: a temperature (Tmp) of the switching element (LHS) is determined (22) and said switching element (LHS) is operated (26) in accordance with the determined temperature (TmP).

Abstract: A device for operating an electric machine, it being possible for the electric machine to be at least operated in generator mode, having an electrical energy accumulator that is connected to the electric machine by an electrical circuit that has a main switch; the circuit having a motor brake circuit that is designed to feed the electrical energy generated by the electric machine in generator mode to the energy accumulator. It is provided that the motor brake circuit be designed to convert the electrical energy into heat in the case of a failure of the main switch, of a connection of the circuit to the energy accumulator and/or of the energy accumulator itself.

Abstract: The invention relates to the protection of a semiconductor switch against overvoltages during a deactivation process. A compensation signal is provided at an input of a driver stage for a semiconductor switch to be deactivated if the voltage at the output of the semiconductor switch exceeds a specified threshold, and simultaneously a request to open the semiconductor switch is detected at an input of the driver stage for the semiconductor switch. The compensation signal is limited to a specified duration. On the basis of the compensation signal provided in the aforementioned manner, the driver stage for the semiconductor switch partly controls the semiconductor switch in order to prevent an excessively quick opening of the semiconductor switch.

Abstract: A device for operating an electric machine, it being possible for the electric machine to be at least operated in generator mode, having an electrical energy accumulator that is connected to the electric machine by an electrical circuit that has a main switch; the circuit having a motor brake circuit that is designed to feed the electrical energy generated by the electric machine in generator mode to the energy accumulator. It is provided that the motor brake circuit be designed to convert the electrical energy into heat in the case of a failure of the main switch, of a connection of the circuit to the energy accumulator and/or of the energy accumulator itself.

Abstract: The invention relates to a surge protection device for a semiconductor switch with an improved response behavior. The protection device comprises a dynamic component together with a static component and a capability to analyze switch operations on the semiconductor switch. The dynamic component of the surge protection device activates in the event of a low surge, but is time-limited, however, with respect to the response behavior. Furthermore, the response of the dynamic component of the surge protection device can also be limited such that a response occurs only after switch operations on the semiconductor switch.

Abstract: The invention relates to a method (10) and to a device (ALE) for operating a switching element (LHS), said method comprising the following steps: a temperature (Tmp) of the switching element (LHS) is determined (22) and said switching element (LHS) is operated (26) in accordance with the determined temperature (TmP).

Abstract: The invention relates to a surge protection device for a semiconductor switch with an improved response behavior. The protection device comprises a dynamic component together with a static component and a capability to analyze switch operations on the semiconductor switch. The dynamic component of the surge protection device activates in the event of a low surge, but is time-limited, however, with respect to the response behavior. Furthermore, the response of the dynamic component of the surge protection device can also be limited such that a response occurs only after switch operations on the semiconductor switch.