Circuit assembly for the primary part of a system for contactless energy transfer, and transformer element

A transfer element is provided as a primary part for a system for contactless energy transmission to a secondary part. It comprises at least one primary coil (7) and power supply and control electronics (2 to 15) for the primary coil (7). The circuit arrangement for the primary part is housed in a common housing (11). Preferably, each primary coil (7) is also housed in the common housing (11).