Abstract: An energy transmission device for contactless transmission of electric energy includes a primary coil device and a secondary coil device, the secondary coil device being supported for rotation relative to the primary coil device about a rotation axis. The primary coil device has a primary yoke element, multiple primary leg elements and a primary winding, the secondary coil device having a secondary yoke element, multiple secondary leg elements and a secondary winding, said primary yoke element and/or the secondary yoke element being made of a laminated core. When viewed in longitudinal section of the rotation axis, the primary yoke element rests against at least one of the primary leg elements and/or the secondary yoke element rests against at least one of the secondary leg elements along a respective joint edge, said respective joint edge and/or a longitudinal center axis of the respective joint edge being slanted relative to the rotation axis.

Abstract: The invention relates to an electrical machine with a stator (1) and a rotor (2), it being possible for the rotor (2) to be moved in rotary fashion with respect to the stator (1), and the stator (1) having slots (4), in which conductor loops (6) of a winding for electrically inducing a magnetic field are arranged, and the rotor (1) having slots (7), in which conductor loops (9) of a winding or cage bars (9) are arranged. Against this background, the invention specifies an electrical machine in which the disruptive noise emission can be reduced significantly whilst maintaining approximately the same performance data for the machine. For this purpose, provision is made for the slots (4, 7) of the stator and/or of the rotor to be spaced apart from one another nonuniformly over the circumference of the stator (1) or the rotor (2). Furthermore the invention specifies a process for manufacturing such an electrical machine.