Rotational Angle Sensor

A rotational angle sensor, comprising:

• a stator element including:
• a stator transmitting coil;
• a printed circuit board having two planes;
• and
• at least two identically configured stator receiving coils that are angularly offset with respect to each other, and that are arranged on the printed circuit board, wherein:
• each of the at least two stator receiving coils is formed from a respective plurality of radial conductors and a respective plurality of circumferential conductors that are arranged in the two planes of the circuit board such that at least two oppositely directed partial windings are formed per stator receiving coil from the respective plurality of radial conductors and the respective plurality of circumferential conductors;
• the plurality of radial conductors each extend in a radial direction from an inner end to an outer end, and are arranged on the printed circuit board in sets of two at least partially overlapping conductors with opposite current directions;
• and
• each of the plurality of circumferential conductors extends in a circumferential direction, connects two inner ends or two outer ends of a respective set of radial conductors, and has a respective plated through hole at which the circumferential conductor changes between the planes of the printed circuit board;
• and
• a rotor element, mounted rotatably about an axis of rotation with respect to the stator element, and including a rotor receiving coil and a rotor transmitting coil that are electrically connected to each other;
• wherein the rotor receiving coil is inductively coupled to the stator transmitting coil such that an electromagnetic field generated by the stator transmitting coil induces a current in the rotor receiving coil that flows through the rotor transmitting coil and causes the rotor transmitting coil to generate a further electromagnetic field;
• and
• wherein the at least two stator receiving coils are inductively coupled to the rotor transmitting coil such that the inductive coupling between the at least two stator receiving coils and the rotor transmitting coil is configured with reference to a rotational angle between the stator element and the rotor element, and such that the further electromagnetic field generated by the rotor transmitting coil induces at least two angle-dependent AC voltages in the at least two stator receiving coils.