Variable reluctance type angle detector

Abstract

A variable reluctance type angle detector 1 is provided with a rotor 5 having such a shape that a gap permeance varies in a sine wave fashion with respect to an angle θ, the rotor 5 being provided rotatably on a stator 4 having teeth 2 on which an excitation wire 7, a SIN output wire 8, and a COS output wire 9 are wound. The number of the teeth 2 is twelve, and the stator 4 has the twelve teeth 2 sequentially disposed along a circumferential direction thereof. The excitation wire 7 is wound around the first, second, third, seventh, eighth, and ninth teeth 2 in a concentrated fashion to generate an identical polarity and wound around the fourth, fifth, sixth, tenth, eleventh, and twelfth teeth 2 in a concentrated fashion to generate a polarity which is reverse to the formerly mentioned polarity. The SIN output wire 8 is wound around the first, second, third, seventh, eighth, and ninth teeth 2 in a concentrated fashion to generate alternating polarities. The COS output wire 9 is wound around the fourth, fifth, sixth, tenth, eleventh, and twelfth teeth 2 in a concentrated fashion to generate alternating polarities.

Dependencies are inferred from the claim text.