Abstract: A power electronics system has a switching device and a liquid cooling device. A switching device has a plate element, and power semiconductor devices are arranged on conductor tracks and connected by means of a connecting device, wherein the liquid cooling device has a first partial body having an inlet volume region and an outlet volume region and a second partial body. A cooling volume region is formed between the two partial bodies, wherein heat transfer bodies protrude into the cooling volume region from the second partial body. The second partial body is arranged in a recess of the first partial body and the two partial bodies are connected to each other and have a common plane surface which forms a first main surface.

Abstract: An electronic power converter is in a housing of a power converter arrangement. A cooling duct for cooling the power converter with a cooling liquid is inside the housing. The cooling duct has a connection supplying the cooling liquid to the cooling duct and for discharging. Mating connections are connected to the connections of the cooling duct. The connections and the mating connections have sealing surfaces which face each other. The interior of the housing and the cooling duct is sealed via sealing devices each have two sealing rings spaced apart from each other. First sealing rings seal the cooling duct and the other sealing rings seal the housing. Annular grooves as outflow ducts in the housing lead off and open out on the outside of the housing and are introduced into the sealing surfaces in the region between the sealing rings.

Abstract: A power electronics system has a switching device and a liquid cooling device. A switching device has a plate element, and power semiconductor devices are arranged on conductor tracks and connected by means of a connecting device, wherein the liquid cooling device has a first partial body having an inlet volume region and an outlet volume region and a second partial body. A cooling volume region is formed between the two partial bodies, wherein heat transfer bodies protrude into the cooling volume region from the second partial body. The second partial body is arranged in a recess of the first partial body and the two partial bodies are connected to each other and have a common plane surface which forms a first main surface.