Sensor arrangement for the contactless sensing of angles of rotation on a rotating part

A sensor arrangement for the contactless sensing of angles of rotation on a rotating part, the sensor arrangement comprising:

• a disk-shaped target coupled to the rotating part, the disk-shaped target having at least one metal surface and configured to generate at least one piece of information for ascertaining an instantaneous angle of rotation of the rotating part, in connection with a coil arrangement;
• the coil arrangement having at least one flat detection coil;
• and
• an evaluation and control unit operable to generate sinusoidal evaluation signals, the signals representing the changes in inductance of the at least one flat detection coil and further operable to evaluate the signals in order to calculate the angle of rotation,
• wherein the coil arrangement includes three flat detection coils uniformly distributed on the circumference of a circle,
• wherein the disk-shaped target includes at least two metal surfaces configured to influence the inductances in the flat detection coils due to eddy current effects, as a function of a degree of overlap,
• wherein a spacing between two conducting path sections of each of the flat detection coils or each of the flat coil sections is configured to be minimum, the conducting path sections extending in a circular arc shape, and
• wherein a spacing between two radially extending conducting path sections of each of the flat detection coils or each of the flat coil sections is configured such that the radially extending conducting path sections are distributed to be uniform over the available surface of each of the flat detection coils or each of the flat coil sections.

A sensor arrangement for the contactless sensing of angles of rotation on a rotating part, the sensor arrangement comprising:

• a disk-shaped target coupled to the rotating part, the disk-shaped target having at least one metal surface and configured to generate at least one piece of information for ascertaining an instantaneous angle of rotation of the rotating part, in connection with a coil arrangement;
• the coil arrangement having at least one flat detection coil;
• and
• an evaluation and control unit operable to generate sinusoidal evaluation signals, the signals representing the changes in inductance of the at least one flat detection coil and further operable to evaluate the signals in order to calculate the angle of rotation,
• wherein the coil arrangement includes three flat detection coils uniformly distributed on the circumference of a circle,
• wherein the disc-shaped target includes at least two metal surfaces configured to influence the inductances in the flat detection coils due to eddy current effects, as a function of a degree of overlap,
• wherein at least one of (i) the flat detection coils and (ii) the flat coil sections are configured as at least one of (i) uniform circle segments and (ii) annular segments having a predefined opening angle and the opening angle of each of the flat detection coils has a value in the range of 100° to 120°, and
• wherein the target includes two metal surfaces arranged opposite one another on the circumference of the circle, each of the metal surfaces having an opening angle with a value in the range of 100° to 120°.