Power inverter for an electrical machine, - wherein the power inverter comprises a power circuit board with a plurality of power semiconductors, - wherein the power inverter comprises a housing with a housing wall, which extends around a central longitudinal axis of the housing, - wherein the power circuit board is fitted in the housing perpendicularly to the central longitudinal axis, - wherein the power inverter comprises a preloading arrangement with at least one resilient clamp and a clamping plate in parallel with the power circuit board, - wherein the power semiconductors are arranged in an edge region of the power circuit board, and are oriented perpendicularly to the latter and in parallel with the central longitudinal axis, and - wherein the at least one resilient clamp is pre-loaded between at least one of the power semiconductors and the clamping plate, and compresses at least one of the power semiconductors against an inner surface of the housing wall, characterized in - that at least one carrier of the preloading arrangement is fitted to the housing wall and oriented perpendicularly to the central longitudinal axis and in parallel with at least one of the power semiconductors, - that the at least one resilient clamp incorporates two flat prongs (64a, 64b), which are connected to each other by means of a bearing section which is arranged on the respective carrier, - that the clamping plate incorporates a clamping edge which is oriented in parallel with the respective carrier, and - that one prong of the at least one resilient clamp engages with at least one of the power semiconductors, and the other prong of the at least one resilient clamp engages with the clamping edge of the clamping plate, in a pre-loaded arrangement. - wherein the power inverter comprises a power circuit board with a plurality of power semiconductors, - wherein the power inverter comprises a housing with a housing wall, which extends around a central longitudinal axis of the housing, - wherein the power circuit board is fitted in the housing perpendicularly to the central longitudinal axis, - wherein the power inverter comprises a preloading arrangement with at least one resilient clamp and a clamping plate in parallel with the power circuit board, - wherein the power semiconductors are arranged in an edge region of the power circuit board, and are oriented perpendicularly to the latter and in parallel with the central longitudinal axis, and - wherein the at least one resilient clamp is pre-loaded between at least one of the power semiconductors and the clamping plate, and compresses at least one of the power semiconductors against an inner surface of the housing wall, - that at least one carrier of the preloading arrangement is fitted to the housing wall and oriented perpendicularly to the central longitudinal axis and in parallel with at least one of the power semiconductors, - that the at least one resilient clamp incorporates two flat prongs (64a, 64b), which are connected to each other by means of a bearing section which is arranged on the respective carrier, - that the clamping plate incorporates a clamping edge which is oriented in parallel with the respective carrier, and - that one prong of the at least one resilient clamp engages with at least one of the power semiconductors, and the other prong of the at least one resilient clamp engages with the clamping edge of the clamping plate, in a pre-loaded arrangement.