An adapter device, including an AC connection including first AC contact and second AC contact; a DC connection including first DC contact and second DC contact; a first bridge branch including first switching device and second switching device, the first switching device and second switching device connected in series at a first bridge point, the first bridge point connected to first AC contact; a second bridge branch including third switching device and fourth switching device, third switching device and fourth switching device connected in series at a second bridge point, the second bridge point connected to second AC contact; and mode-setting device configured to predetermine a direction of power flow between AC connection and/or DC connection, first bridge branch and second bridge branch connected in parallel to the first DC contact and second DC contact, and different types of switching devices used as switching devices of a bridge branch.

A device includes a first switch and a first diode connected in parallel between a midpoint and a first terminal of the hybrid power device, a second switch and a second diode connected in parallel between the midpoint and a second terminal of the hybrid power device, a third switch coupled between the first terminal and the second terminal, and a third diode connected between the first terminal and the second terminal.

Various embodiments include a switching device for disconnecting a current path in a DC supply system, said current path comprising source-end and load-end inductances, comprising: two series-connected switching modules, wherein each of the switching modules comprises a controllable semiconductor switching element connected in parallel to a series circuit with a resistor and a capacitor. Each resistor includes two respective series-connected resistors. A first end of the respective resistor is connected to a first load terminal of the controllable semiconductor switching element and a second end of the respective resistor is connected to the capacitor. Each of the switching modules comprises a further controllable semiconductor switching element connected between a first node of the two resistors in the respective resistor and a second node connects the capacitor to a second load terminal of the controllable semiconductor switching element.

Unique systems, methods, techniques and apparatuses of solid state circuit breaker protection are disclosed. One exemplary embodiment is a solid state circuit breaker comprising a primary switching device including a first terminal and a second terminal and a voltage clamping circuit coupled in parallel with the primary switching device. The voltage clamping circuit includes a metal-oxide varistor (MOV) coupled in series between the first terminal and an auxiliary semiconductor device, the auxiliary semiconductor device being arranged so as to selectively couple the MOV with the second terminal, and a bypass circuit coupled between the first terminal and the auxiliary semiconductor device.

Various embodiments include a switching device for disconnecting a current path in a DC supply system, said current path comprising inductances at the source end and the load end, the switching device comprising: two series-connected switching modules; wherein each of the series-connected switching modules comprises a controllable semiconductor switching element and a series circuit; the series circuit including a resistor and a capacitor connected in parallel to the controllable semiconductor switching element.

A circuit arrangement includes a plurality of switch assemblies connected in series, each provided with a parallel circuit of three assembly components, in which a first assembly component is a semiconductor switch, a second assembly component is a freewheeling diode, and a third assembly component is a surge arrester. The assembly components are disposed one above the other or next to one another as an assembly component stack, the three assembly components of each switch assembly are disposed in the assembly component stack in a consecutive manner. Each two adjacent assembly components are electrically connected to one another by a direct connection. A power converter module and a method for operating a power converter module are also provided.

A device includes a first diode and a second diode connected in series between a first terminal and a second terminal of a switching element, wherein the switching element is a unidirectional device and an anode of the first diode is directly connected to an anode of the second diode, a third diode connected between the first terminal and the second terminal of the switching element and a switch connected in parallel with the first diode.

A semiconductor device according to an embodiment is a semiconductor device including: a first diode having a first anode and a first cathode, the first anode for electrically connecting to one of a first electrode and a second electrode of a semiconductor element including the first electrode, the second electrode, and a gate electrode; a first capacitor having a first end electrically connected to the first cathode, and a first other end; a bias element having a first bias element end electrically connected to the first cathode and the first end, and a second bias element end for electrically connecting to a positive electrode of a direct-current power supply including the positive electrode and a negative electrode; a second diode having a second anode and a second cathode, the second anode electrically connected to the first other end; a second capacitor having a second end and a second other end, the second end electrically connected to the second cathode; a switch electrically connected in parallel to the second capacitor between the second end and the second other end; an analog-digital converter or sample-and-hold circuit electrically connected to the second cathode and the second end; and a third diode having a third anode and a third cathode, the third anode electrically connected to the second other end, and the third cathode electrically connected to the first other end and the second anode.

A high voltage switch comprising: a high voltage power supply providing power greater than about 5 kV; a control voltage power source; a plurality of switch modules arranged in series with respect to each other each of the plurality of switch modules configured to switch power from the high voltage power supply, and an output configured to output a pulsed output signal having a voltage greater than the rating of any switch of the plurality of switch modules, a pulse width less than 2 s, and at a pulse frequency greater than 10 kHz.

A high voltage switch comprising: a high voltage power supply providing power greater than about 5 kV; a control voltage power source; a plurality of switch modules arranged in series with respect to each other each of the plurality of switch modules configured to switch power from the high voltage power supply, and an output configured to output a pulsed output signal having a voltage greater than the rating of any switch of the plurality of switch modules, a pulse width less than 2 s, and at a pulse frequency greater than 10 kHz.