Patent ID: 7408340

Claim:
A variable reluctance type angle detectors, comprising: a stator including teeth, a number of the teeth being twelve, and a first one of the teeth to a twelfth one of the teeth being provided sequentially in numerical order along a circumferential direction of the stator; a rotor which is rotatable relative to the stator, said rotor having a shape such that a gap permeance varies in a sine wave fashion with respect to an angle; an excitation wire being wound around a first group of said teeth including the first, second, third, seventh, eighth, and ninth ones of the teeth in a concentrated fashion to generate a first polarity identical for all of said first group of teeth, and wound around a second group of teeth including the fourth, fifth, sixth, tenth, eleventh, and twelfth ones of said teeth in a concentrated fashion to generate a second polarity which is reverse to the first polarity; a first output wire being wound around the first, second, third, seventh, eighth, and ninth ones of the teeth in a concentrated fashion to generate alternating polarities; and a second output wire being wound around the fourth, fifth, sixth, tenth, eleventh, and twelfth ones of the teeth in a concentrated fashion to generate alternating polarities.