Patent ID: 7148599

Claim:
An iron core winding for an iron core, wherein the winding includes coils of opposite polarities, and coils of a first polarity are coiled in series so that the beginning and ending of each coil cross on a corresponding magnetic pole, and coils of a second polarity, which is opposite to the first polarity, are coiled in series so that the beginning and ending of each coil cross on a corresponding magnetic pole, and the winding direction of the coils of the first polarity is opposite to that of the coils of the second polarity, wherein the iron core winding forms a two-phase output winding of a variable reluctance angle detector, and the variable reluctance angle detector includes: a stator, in which an excitation winding and the two-phased output winding are coiled around the magnetic poles; and a rotor, which is shaped such that the gap permeance of the stator changes in a sine wave form according to an angle of rotation θ.