Patent ID: 8044822

Claim:
Rotary transmitter having a stator part ( 18 ) and a rotor part ( 26 ), each having a respective stator core part ( 72 ) and a rotor core part ( 74 ), which are separated from one another at mutually facing ends, and each having at least one respective power winding ( 76 , 78 ), which is wound on the stator core part and the rotor core part, in order to transmit power using the transformer principle, and having respective stator and rotor coupling turns ( 80 ′, 80 ″, 82 ′, 82 ″), which are associated with one another in pairs, for inductive data transmission, which are connected to transmitting and/or receiving electronics, in which the coupling turns ( 80 ′, 80 ″, 82 ′, 82 ″) are separated from the area of the power winding ( 76 , 78 ), and are shielded from them, characterized in that the coupling turns are arranged in the associated stator part and rotor part, in each case forming a three-dimensionally curved loop, in that the stator coupling turn ( 80 ′, 80 ″) has a turn branch ( 88 ′) close to the rotor and a turn branch ( 88 ″) remote from the rotor, which are connected to one another via at least one direction-changing loop ( 88 ′″), in that the rotary coupling turn ( 82 ′, 82 ″) has a turn branch ( 89 ′) close to the stator and at least one turn branch remote from the stator, which are connected to one another via at least one direction-changing loop, in that the turn branches ( 88 ′, 88 ″) of the stator coupling turn ( 80 ′, 80 ″), together with the associated direction-changing loop ( 88 ′″) cover a partially cylindrical area, in that the turn branches of the rotor coupling turn ( 82 ′, 82 ″) together with the associated direction-changing loop cover a cylindrical area, in that the partially cylindrical area of the stator coupling turn ( 80 ′, 80 ″) and the cylindrical area of the associated rotor coupling turn ( 82 ′, 82 ″) are arranged with approximately the same cylinder radii, at an axial distance from one another coaxially with respect to the rotation axis ( 12 ) of the rotor part ( 28 ) and in that the turn branch ( 89 ′) of the rotor coupling turn ( 82 ′, 82 ″) which is close to the stator, and the turn branch ( 88 ′) of the stator coupling turn ( 80 ′, 80 ″) which is close to the rotor are arranged with approximately the same circumferential curvature parallel to one another and at an axial distance from one another.