A voltage estimating device for a power supply line according to one aspect of the present disclosure includes a voltage detector, a current detector, a voltage calculator. The voltage calculator calculates a magnitude of alternating primary voltage that a primary winding in a transformer receives from a power supply line based on a magnitude of tertiary voltage in the transformer detected by the voltage detector, a magnitude of output current in the transformer detected by the current detector, and correlation information. The correlation information indicates a correlation between a voltage ratio and the magnitude of the output current, and the voltage ratio represents a ratio of the magnitude of the primary voltage to the magnitude of the tertiary voltage.

A rail vehicle (1), a method of producing and method of driving the rail vehicle (1) which comprises at least one car body (2). The car body (2) comprises two car body ends (3, 4) the end region of which is supported on a respective wheel unit (5, 6). At least one wheel unit (5, 6) is designed to be driven. The rail vehicle comprises a drive arrangement comprising a transformer unit (7), a traction motor unit (9) and a power converter unit (8). The primary transformer unit (7) and primary power converter unit (8) are arranged adjacent the first wheel unit (5). The primary transformer unit (7) and the primary power converter unit (8) are connected to the second wheel unit (6) such that a traction motor unit (9), of the second wheel unit (6), can be driven by the primary transformer unit and the primary power converter unit.

A power converter module includes an active metal braze (AMB) substrate, power converter circuitry, and a housing. The AMB substrate includes an aluminum nitride base layer, a first conductive layer on a first surface of the aluminum nitride base layer, and a second conductive layer on a second surface of the aluminum nitride base layer opposite the first surface. The power converter circuitry includes a number of silicon carbide switching components coupled to one another via the first conductive layer. The housing is over the power converter circuitry and the AMB substrate. By using an AMB substrate with an aluminum nitride base layer, the thermal dissipation characteristics of the power converter module may be substantially improved while maintaining the structural integrity of the power converter module.

A vehicle, in particular a logistics vehicle, includes a frame and a housing component secured in place thereon. An insert part on the housing component is insertable into a space region of the vehicle, and a first or a second energy store module is situated on the insert part and a DC/DC converter which is electrically connected to the energy store module.

Provided herein are a heat sink module of an inverter module to power an electric vehicle. The heats sink module can include a heat sink body having a plurality of mounting holes, a fluid inlet and a fluid outlet. The heats sink module can include a cooling channel that can be fluidly coupled with the fluid inlet and the fluid outlet. The heats sink module can include an insulator plate having a first surface and a second surface. The second surface of the insulator plate can couple with a joining surface of the heat sink body to seal the cooling channel. The heats sink module can include a heat sink lid disposed over the insulator plate. The heat sink lid can have a plurality of mounting feet to couple with the mounting holes of the heat sink body to secure the heat sink lid to the heat sink body.

Provided herein are a heat sink module of an inverter module to power an electric vehicle. The heats sink module can include a heat sink body having a plurality of mounting holes, a fluid inlet and a fluid outlet. The heats sink module can include a cooling channel that can be fluidly coupled with the fluid inlet and the fluid outlet. The heats sink module can include an insulator plate having a first surface and a second surface. The second surface of the insulator plate can couple with a joining surface of the heat sink body to seal the cooling channel. The heats sink module can include a heat sink lid disposed over the insulator plate. The heat sink lid can have a plurality of mounting feet to couple with the mounting holes of the heat sink body to secure the heat sink lid to the heat sink body.

A silicon carbide semiconductor device includes an n-type silicon carbide semiconductor substrate, a drain electrode electrically connected to a rear face, an n-type semiconductor layer having a second impurity concentration lower than the first impurity concentration, a p-type first semiconductor region, an n-type second semiconductor region, an n-type third semiconductor region, a trench having a first side face and a second side face opposing to each other and a third side face intersecting with the first side face and the second side face, a gate electrode formed in the trench with a gate insulating film interposed therebetween, a metal layer electrically connected to the third semiconductor region, and a source electrode electrically connecting the second semiconductor region and the metal layer to each other.

An electric power conversion device has semiconductor modules, a main P bus bar, a main N bus bar, a capacitor module, an input P bus bar and an input N bus bar. The input N bus bar is connected to the DC power source. The main N bus bar is connected to a negative electrode terminal of the semiconductor module to supply the DC power. A capacitor N bus bar, a filter capacitor and a smoothing capacitor in the capacitor module are molded by capacitor molded resin. The capacitor N bus bar is connected to a negative electrode terminal of the filter capacitor. The input N bus bar has a first N connection section connected to the capacitor N bus bar and a second N connection section connected to the main N bus bar. The main N bus bar is arranged outside of the capacitor mold resin.

A power converter module includes an active metal braze (AMB) substrate, power converter circuitry, and a housing. The AMB substrate includes an aluminum nitride base layer, a first conductive layer on a first surface of the aluminum nitride base layer, and a second conductive layer on a second surface of the aluminum nitride base layer opposite the first surface. The power converter circuitry includes a number of silicon carbide switching components coupled to one another via the first conductive layer. The housing is over the power converter circuitry and the AMB substrate. By using an AMB substrate with an aluminum nitride base layer, the thermal dissipation characteristics of the power converter module may be substantially improved while maintaining the structural integrity of the power converter module.

A power distribution control approach employs power distribution buses that are controllably energized and de-energized to control which aerial vehicle systems received power based on the applicable operational mode. A method of controlling power distribution in an electrically powered vertical takeoff and landing aircraft includes receiving an operational mode indication that identifies an operational mode. The operational mode is one of predetermined operational modes for the aircraft. Power distribution buses of the aircraft are controlled, based on the operational mode indication, to control each of the power distribution buses to be energized or de-energized.