Abstract: A conversion device converts an input power into an output power, and gives rise to a power loss. The conversion device is cooled by a coolant circuit in which a coolant flows. A monitoring device determines, using operating data of the conversion device and/or of the coolant circuit, a flow velocity of the coolant and compares the flow velocity with a limit velocity. If the flow velocity reaches or exceeds the limit velocity, the monitoring device resorts to a special reaction. As long as the flow velocity does not reach the limit velocity, the monitoring device resorts either to no reaction or to a normal reaction that is not the same as the special reaction. The monitoring device determines the flow velocity by using a quantity of heat that is to be removed by the coolant per unit time, a local temperature of the conversion device, and an inflow temperature.

Abstract: Various embodiments include a coil device for a power converter, the device comprising: a cooling plate; and a plurality N?3 of coil windings. The cooling plate is thermally coupled to at least one end face of one of the plurality of coil windings. The coil windings are spatially offset from one another by an angle of 2?/N. The cooling plate defines a cooling channel extending at least partially around each of the plurality of coil windings.

Abstract: A device for cooling a bus bar includes a heat absorption element, a heat transportation system and a heat output element. The heat absorption element and heat output element rest essentially in a form-fit manner on respective heat sources or heat sinks, with additional contact pressure being applied with the heat absorption element and heat output element by compression springs or contact elements.

Abstract: A conversion device converts an input power into an output power, and gives rise to a power loss. The conversion device is cooled by a coolant circuit in which a coolant flows. A monitoring device determines, using operating data of the conversion device and/or of the coolant circuit, a flow velocity of the coolant and compares the flow velocity with a limit velocity. If the flow velocity reaches or exceeds the limit velocity, the monitoring device resorts to a special reaction. As long as the flow velocity does not reach the limit velocity, the monitoring device resorts either to no reaction or to a normal reaction that is not the same as the special reaction. The monitoring device determines the flow velocity by using a quantity of heat that is to be removed by the coolant per unit time, a local temperature of the conversion device, and an inflow temperature.

Abstract: In a method for measuring a current, a plurality of flux-gate field sensors is arranged with radial symmetry on a first circumferential path, and a plurality of Hall sensors is arranged with radial symmetry on a second circumferential path such that a one of the flux-gate field sensors is placed adjacent a one of the Hall sensors, with the flux-gate field sensors having a sensitivity which is higher by a factor 5 to 20 than a sensitivity of the Hall sensors. At least one of the plurality of flux-gate field sensors is evaluated so as to determine a current intensity, when two of the flux-gate field sensors generate measurement values within a measurement range, or at least one of the plurality of Hall sensors is evaluated so as to determine a current intensity, when the measurement values of the two flux-gate field sensors are outside of the measurement range.

Abstract: In a method for measuring a current, a plurality of flux-gate field sensors is arranged with radial symmetry on a first circumferential path, and a plurality of Hall sensors is arranged with radial symmetry on a second circumferential path such that a one of the flux-gate field sensors is placed adjacent a one of the Hall sensors, with the flux-gate field sensors having a sensitivity which is higher by a factor 5 to 20 than a sensitivity of the Hall sensors. At least one of the plurality of flux-gate field sensors is evaluated so as to determine a current intensity, when two of the flux-gate field sensors generate measurement values within a measurement range, or at least one of the plurality of Hall sensors is evaluated so as to determine a current intensity, when the measurement values of the two flux-gate field sensors are outside of the measurement range.

Abstract: Various embodiments include a coil device for a power converter, the device comprising: a cooling plate; and a plurality N?3 of coil windings. The cooling plate is thermally coupled to at least one end face of one of the plurality of coil windings. The coil windings are spatially offset from one another by an angle of 2?/N. The cooling plate defines a cooling channel extending at least partially around each of the plurality of coil windings.

Abstract: A converter arrangement includes a housing having a first cooling air channel, at least one capacitor disposed in the housing, a fan for generating a cooling air flow, and a first power electronics module disposed in the housing between the at least one capacitor and the fan, as viewed in a direction of the cooling air flow. The first power electronics module is positioned in relation to the fan so as to only be cooled by a first partial air flow. A second partial air flow provided for cooling the at least one capacitor is routed via the first cooling air channel past the first power electronics module such that the second partial air flow is thermally separated from the first power electronics module.

Abstract: A converter arrangement includes a housing having a first cooling air channel, at least one capacitor disposed in the housing, a fan for generating a cooling air flow, and a first power electronics module disposed in the housing between the at least one capacitor and the fan, as viewed in a direction of the cooling air flow. The first power electronics module is positioned in relation to the fan so as to only be cooled by a first partial air flow. A second partial air flow provided for cooling the at least one capacitor is routed via the first cooling air channel past the first power electronics module such that the second partial air flow is thermally separated from the first power electronics module.

Abstract: There is described a heat sink having at least one tube through which cooling medium flows and which is surrounded by a heat-conducting material, wherein the tube wall of the at least one tube is corrugated in the direction of flow. The corrugated embodiment has the advantage that the transition from laminar to turbulent flow relative to a straight-walled tube is effected at a lower flow velocity and the heat transfer area is greater at the same tube length.

Abstract: A modular converter unit and a power converter assembly having at least one modular converter unit are described. The converter unit includes a two-sided cooling device and an intermediate circuit capacitor battery with several capacitors that are arranged one on top of the other in a mounting frame. A power module with a control component and a conductor rail system is arranged on one or more mounting plates. The mounting frame is finished with metal sheets for forming channel. A compact converter unit can thus be produce a series of universal modular converter assemblies at low cost.

Abstract: A modular converter unit and a power converter assembly having at least one modular converter unit are described. The converter unit includes a two-sided cooling device and an intermediate circuit capacitor battery with several capacitors that are arranged one on top of the other in a mounting frame. A power module with a control component and a conductor rail system is arranged on one or more mounting plates. The mounting frame is finished with metal sheets for forming a cooling channel. A compact converter unit can thus be constructed and used to produce a series of universal modular converter assemblies at low cost.

Abstract: A cooling element includes a base plate and several spaced-apart cooling fins which are arranged on a flat side of the base plate. The end faces of the cooling fins together with the formed cooling channels form an inflow side and an outflow side for cooling air. The end face of the cooling fins on the inflow side and the outflow side are configured to produce a low flow resistance. This substantially reduces the counterpressure exerted on the cooling air flow and thereby obviates the need for high-power fans, without a reduction in the removed heat per unit time {dot over (Q)}.

Abstract: A heat sink for semiconductor components has a fin base and a plurality of spaced fins that all have the same height. A side of the base facing the fins is configured convexly with respect to the side of the fin base facing the semiconductor component, so that when the heat sink is used as intended, the roots of its fins are arranged on a surface of constant temperature. This yields a finned heat sink that attains a heat flux density hitherto achievable only with evaporative or fluid coolers.