A power conversion device includes a first electrical component, a second electrical component, a housing, a board, and a guide part. The first and second electrical components are accommodated in and fixed to the housing. The board has first through holes into which first signal terminals of the first electrical components are inserted, and second through holes into which second signal terminals of the second electrical components are inserted. The guide part is connected to the board so that guide holes formed therein are aligned with the second through holes. The first signal terminals are connected to the board through a first connection portion, and the second signal terminals are connected to the board through a second connection portion. A number of the first through holes disposed per unit area is greater than a number of second through holes disposed per unit area.

A power electronics unit (1) for an electric drive unit, having an electrically conductive carrier element (2) and a power semiconductor module (3) arranged on the carrier element (2). The power semiconductor module (3) is designed to convert a direct current into a three-phase alternating current, and a current sensor (4) used to determine the alternating current is integrated such that it forms a main module (5) with the carrier element (2) and the power semiconductor module (3). A drive train for a motor vehicle having such a power electronics unit (1) is also provided.

A vehicle includes a traction battery and a converter. The converter includes a switch and first and second busbars electrically connected in parallel between the traction battery and the switch. The second busbar has an inductance less than the first busbar and includes a resistor having a resistance at least an order of magnitude greater than a resistance of the first busbar.

A drive unit for an electric vehicle, including an electric machine, a gear mechanism, a housing, wherein the electric machine and the gear mechanism are arranged in an interior of the housing, and a receiving apparatus for a pulse inverter module, wherein the housing has an opening and the receiving apparatus is arranged in the interior of the housing directly behind the opening.

A semiconductor module may include a plurality of semiconductor elements; and a first power terminal, a second power terminal and a third power terminal electrically connected to the plurality of semiconductor elements. The plurality of semiconductor elements may include at least one upper arm switching element electrically connected between the first power terminal and the second power terminal; and at least one lower arm switching element electrically connected between the second power terminal and the third power terminal. A number of the at least one upper arm switching element may be different from a number of the at least one lower arm switching element.

A drive device, in particular for a motor vehicle, including an electric motor and an inverter, wherein the electric motor includes at least one electrically conductive motor contact element for electrically contacting a respective electrically conductive inverter contact element of the inverter, wherein the motor contact element is mounted directly or via a motor sealing means on a motor housing component of a motor housing of the electric motor and the inverter contact element is mounted directly or via an inverter sealing means on an inverter housing component of an inverter housing of the inverter, wherein the motor contact element and the inverter contact element are mechanically fastened to one another by a fastening means, wherein the fastening means and a respective housing-external section of the motor contact element and the inverter contact element are accommodated in a liquid-tight receptacle chamber.

There is provided a transformer system (10) for converting a grid voltage (V.sub.grid) to a regulated voltage (V.sub.regulated) and output the regulated voltage (V.sub.regulated) to a power line (30), the transformer system (10) comprising: a first transformer (40) configured to step down the grid voltage (V.sub.grid) to an unregulated voltage (V.sub.unregulated) and provide the unregulated voltage (V.sub.unregulated) at an output of the first transformer (40); a shunt coupling transformer (50) connected in parallel with the output of the first transformer (40) and further connected to power electronics circuitry (60); and a series coupling transformer (70) connected in series with the output of the first transformer (40) and further connected to the power electronics circuitry (60). The power electronics circuitry (60) adds, via the series coupling transformer, a conditioning voltage (V.sub.conditioning) in series to the unregulated voltage (V.sub.unregulated) to generate the regulated voltage (V.sub.regulated). The first transformer, the series coupling transformer and the shunt coupling transformer are housed in a single transformer tank (80), and the power electronics circuitry is housed in a power electronics enclosure (90) separate from the transformer tank. Each of the transformer tank and the power electronics enclosure comprises one or more openings (95) through which electrical connections (97) between the shunt coupling transformer (50), the series coupling transformer (70) and the power electronics circuitry (60) pass.

A housing and/or installation frameworks for a modular multi-level energy system includes a set of similar cabinets configured for orthogonal (e.g., vertical and horizontal) alignment of the modules. The cabinets are configured so modules of a particular phase are oriented along an axis parallel to a reference plane. Modules of the same level of the multi-level arrangement but of different phases are mounted in each cabinet, arranged such that a module for each phase is a defined distance from the reference plane. The cabinets are arranged equidistant and orthogonal to the reference plane, minimizing distance for connections between modules of the same phase across multiple cabinets, and facilitating convenient addition or removal of levels. The framework also facilitates data and reference signal connections between local control devices of the modules, and between the local control devices and a master control device for the system.

A protection device is disclosed which may comprise a first sensor, a first switch or a controller. The first sensor may be coupled to a first busbar of busbars and may be configured to measure a respective first electrical characteristic of the first busbar. The first switch may be connected between the first busbar and a reference terminal. The first switch may be configured to connect or disconnect the first busbar to and from the reference terminal. The controller may be coupled to the first sensor and to the first switch and may be configured to control the first switch to connect the first busbar to the reference terminal (e.g., based on the measurement of the first electrical characteristic indicating a change in the first electrical characteristic).

A ground power unit provides electrical energy for aircraft and a method maintains and operates the ground power unit. The ground power unit includes a base frame, a cable system formed in the base frame, at least one rectifier module for converting an input alternating voltage applied to a rectifier module input side into an intermediate direct voltage output at a rectifier module output side, wherein the rectifier module output side is coupled to an intermediate circuit conductor and at least one inverter module for converting the intermediate direct voltage applied to an inverter module input side into an output alternating current output at an inverter module output side, wherein the inverter module input side is coupled to an intermediate circuit conductor. The rectifier module and the inverter module are each realized as structurally-independent units, which can be replaced individually and independently of the base frame.