Abstract: A pulse inverter includes a plurality of power modules, at least one capacitor assembly with a plurality of capacitors, at least one power module cooling channel configured to be perfused by a cooling fluid in order to cool the power modules, and at least one capacitor cooling channel configured to be perfused by a cooling fluid in order to cool the capacitors. The pulse inverter also includes a plurality of connection channels extending between the at least one power module cooling channel and the at least one capacitor cooling channel, the connection channels being configured to be perfused by the cooling fluid.

Abstract: A pulse inverter for operating an electric machine of a motor vehicle includes a power module for converting DC current provided by a motor vehicle battery into AC current. The pulse inverter includes a cooling device for cooling components of the pulse inverter by an electrically insulating cooling fluid flowing through the cooling device, wherein the cooling device includes a fluid-tight housing. Cooling fluid flowing through the fluid-tight housing is in direct contact with at least one of the components of the pulse inverter to be cooled. The cooling device includes a cooling channel. The power module is thermally connected to an outer surface of the cooling channel, wherein the cooling channel includes an output. The output opens into the fluid-tight housing, so that the cooling fluid flowing through the cooling device first flows through the cooling channel and subsequently the fluid-tight housing.