Device having an electrical device, power electronic converter and method for improving an electromagnetic compatibility of an electrical device

摘要

The invention relates to a device (20) with an electrical device having at least one region (6) and a first coil (12), wherein region (6) during operation of the electrical device (2) at least temporarily with a fluctuating electrical potential (7) is acted upon and via a first capacitive coupling (16) to a first potential (15) can be coupled, and- the region (6) via the first coil (12) to a first connection point (1V) is conductively connected. The device according to the invention has improved electromagnetic compatibility. For this purpose, the electrical device (2) comprises at least one extension (24) with an end region (25) and a second coil (26). The end region (25) is conductively connected to the first connection point (1V) via the second coil (26) and can be coupled to the first potential (15) via a second capacitive coupling (27), wherein the end region (25) is otherwise free of conductive Connections to the electrical device (2) or only via at least one capacitive coupling (28, 29) is conductively connected to the electrical device. The first and second coils (12, 26) are inductively coupled together and have an opposite sense of winding. The totality of inductive coupling, second coil (26), second capacitive coupling (27), first capacitive coupling (16) and first coil (12) are matched to one another such that a parasitic current flowing in via the first capacitive coupling (16) Substantially corresponds to an inverse current via the second capacitive coupling (27).