Rotor apparatus and apparatus for detecting angular position of rotor

A rotor apparatus, comprising:

• a rotor configured to rotate around a rotational axis;
• an angular position identification layer disposed to surround the rotational axis and configured to rotate according to rotation of the rotor, and having a width varying with angular positions of the rotor;
• and
• an angular range identification layer disposed to surround the rotational axis, configured to rotate according to the rotation of the rotor, having a shape different from a shape of the angular position identification layer, and configured such that an overall width of a portion of the angular range identification layer corresponding to an angular position range, among a plurality of different angular position ranges of the rotor, in which an angular position corresponding to a point reversing a width change direction of the angular position identification layer is located, is different from an overall width of a remaining portion of the angular range identification layer.

An apparatus for detecting an angular position of a rotor, comprising:

• an angular position identification inductor;
• an angular range identification inductor;
• a rotor configured to rotate around a rotational axis;
• an angular position identification layer disposed to surround the rotational axis and configured to rotate according to rotation of the rotor, and configured to change an inductance of the angular position identification inductor according to angular positions of the rotor;
• and
• an angular range identification layer disposed to surround the rotational axis and configured to rotate according to the rotation of the rotor, and configured such that overall inductance of the angular range identification inductor in an angular position range, among a plurality of different angular position ranges of the rotor, in which an angular position corresponding to a point reversing an inductance change direction of the angular position identification inductor is located, is different from overall inductance of the angular range identification inductor in a remaining angular position range among the plurality of different angular position ranges.