Abstract: A transformer is described. The transformer includes a transformer core having a core leg having a longitudinal axis, a low voltage winding arranged around the core leg, the low voltage winding extending along a first length in the direction of the longitudinal axis, a high voltage winding arranged around the low voltage winding, the high voltage winding extending along a second length in the direction of the longitudinal axis, wherein the second length is shorter than the first length, and a casting embedding the low voltage winding and the high voltage winding. The casting has a recess. The recess is provided at a radial location of the high voltage winding and the recess extends in the direction of the longitudinal axis.

Abstract: Transformer assembly including a first transformer stage having a plurality of first-stage transformer cells; and a second transformer stage. An input of the second transformer stage is connected to an output of the first transformer stage. A lightning impulse breakdown voltage of a transformer cell of the second stage is at least double of a lightning impulse breakdown voltage of transformer cells of the first stage.

Abstract: A power module included a plurality of normally-on semiconductor switches based on a wide bandgap substrate, the normally-on semiconductor switches connected in parallel; and a balancing unit including a capacitor and a balancing semiconductor switch connected in series, which are connected in parallel to the normally-on semiconductor switches.

Abstract: A converter cell for a modular converter includes at least one power semiconductor switch for switching a cell current through the converter cell; a cell capacitor interconnected with the at least one power semiconductor switch, such that the cell capacitor is loadable by the cell current; a controller for switching the at least one power semiconductor switch, wherein the controller is supplyable with auxiliary power from the cell capacitor; and a photovoltaic cell for providing initial and/or further auxiliary power to the controller.

Abstract: A power module included a plurality of normally-on semiconductor switches based on a wide bandgap substrate, the normally-on semiconductor switches connected in parallel; and a balancing unit including a capacitor and a balancing semiconductor switch connected in series, which are connected in parallel to the normally-on semiconductor switches.

Abstract: A multi-phase inductor includes a core made of a magnetic material; at least two phase windings surrounding the core for inducing a magnetic field in the core, such that a common mode inductance (LCM) is provided for the at least two phase windings; and an adjustment member made of a magnetic material, which adjustment member has at least two legs, which are interconnected with each other at an inner end and which are touching the core at an outer end to provide a differential mode inductance (LDM) for the at least two phase windings; wherein the outer end of each leg of the adjustment member overlays an axial side of the core and/or each leg of the adjustment member has a varying thickness between the inner end and the outer end to adjust the differential mode inductance (LDM).

Abstract: A failure tolerant capacitor device comprises a plurality of capacitor elements connected in parallel. For each capacitor element, there is a detection element and a connection element. The detection element is adapted for detecting a capacitor voltage across the capacitor element falling below a predefined voltage threshold and/or for detecting a capacitor current through the capacitor element raising above a predefined current threshold and for turning off the connection element when the capacitor voltage is below the predefined voltage threshold and/or the capacitor current is above the predefined current threshold. The connection element is adapted for disconnecting the capacitor element from other ones of the plurality of parallel connected capacitor elements when turned off. The detection element and the connection element each include a transistor.

Abstract: A failure tolerant capacitor device comprises a plurality of capacitor elements connected in parallel. For each capacitor element, there is a detection element and a connection element. The detection element is adapted for detecting a capacitor voltage across the capacitor element falling below a predefined voltage threshold and/or for detecting a capacitor current through the capacitor element raising above a predefined current threshold and for turning off the connection element when the capacitor voltage is below the predefined voltage threshold and/or the capacitor current is above the predefined current threshold. The connection element is adapted for disconnecting the capacitor element from other ones of the plurality of parallel connected capacitor elements when turned off. The detection element and the connection element each include a transistor.

Abstract: A converter cell for a modular converter includes at least one power semiconductor switch for switching a cell current through the converter cell; a cell capacitor interconnected with the at least one power semiconductor switch, such that the cell capacitor is loadable by the cell current; a controller for switching the at least one power semiconductor switch, wherein the controller is supplyable with auxiliary power from the cell capacitor; and a photovoltaic cell for providing initial and/or further auxiliary power to the controller.

Abstract: An electrical power circuit assembly includes a heat sink having a first surface portion and a second surface portion, a power semiconductor module being in thermal contact with the first surface portion of the heat sink for dissipating heat from the power semiconductor module to the heat sink via the first heat sink surface portion, and a capacitor having an axis. The capacitor is arranged with its axis essentially parallel to the second heat sink surface portion and with a circumferential surface portion being in thermal contact with the second surface portion of the heat sink for dissipating heat from the capacitor to the heat sink via the second heat sink surface portion.

Abstract: An electronic device including a sealed enclosure, the electronic components arranged inside the sealed enclosure and including high-loss high-temperature components, a main heat sink including ribs, wherein the high-loss high-temperature components are attached to the main heat sink and the ribs of the main heat sink are arranged outside the enclosure, a cavity formed inside the enclosure and divided into a plurality of channel-like sections, the channel-like sections configured for providing air flow guidance inside the enclosure and being interconnected at their ends, wherein at least one channel-like section contains the electronic components and at least one other channel-like section contains an air-to-air heat exchanger extending from inside the sealed enclosure to outside of the sealed enclosure, wherein the electronic components inside the at least one channel like section are adapted to be cooled by air flow inside the sealed enclosure.

Abstract: An exemplary energy supply device for explosion-proof electronic functional units includes a plurality of inductors. The functional units are supplied from a high-frequency AC voltage that is individually output for each of the functional units via an inductor. In order to supply a multiplicity of functional units with little effort, the multi-level printed circuit board of each inductor is at least partially covered with a flat board of a magnetic material parallel to the plane of its conductor tracks.

Abstract: An electronic device including a sealed enclosure, the electronic components arranged inside the sealed enclosure and including high-loss high-temperature components, a main heat sink including ribs, wherein the high-loss high-temperature components are attached to the main heat sink and the ribs of the main heat sink are arranged outside the enclosure, a cavity formed inside the enclosure and divided into a plurality of channel-like sections, the channel-like sections configured for providing air flow guidance inside the enclosure and being interconnected at their ends, wherein at least one channel-like section contains the electronic components and at least one other channel-like section contains an air-to-air heat exchanger extending from inside the sealed enclosure to outside of the sealed enclosure, wherein the electronic components inside the at least one channel like section are adapted to be cooled by air flow inside the sealed enclosure.

Abstract: An exemplary energy supply device for explosion-proof electronic functional units, in which the functional units are supplied from a high-frequency AC voltage that is individually output for each of the functional units via an inductor. In order to supply a multiplicity of functional units with little effort, the multi-level printed circuit board of each inductor can be covered with a flat board of magnetic material. The flat board being parallel to a plane of conductor tracks of the inductors.

Abstract: An electrical power circuit assembly includes a heat sink having a first surface portion and a second surface portion, a power semiconductor module being in thermal contact with the first surface portion of the heat sink for dissipating heat from the power semiconductor module to the heat sink via the first heat sink surface portion, and a capacitor having an axis. The capacitor is arranged with its axis essentially parallel to the second heat sink surface portion and with a circumferential surface portion being in thermal contact with the second surface portion of the heat sink for dissipating heat from the capacitor to the heat sink via the second heat sink surface portion.