Variable reluctance type angle detector

Details Variable reluctance type angle detector Variable reluctance type angle detector

2006-03-30

2008-08-05

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

Reexamination Certificate

active

07408340

ABSTRACT:
A variable reluctance type angle detector1is provided with a rotor5having such a shape that a gap permeance varies in a sine wave fashion with respect to an angle θ, the rotor5being provided rotatably on a stator4having teeth2on which an excitation wire7,a SIN output wire8,and a COS output wire9are wound. The number of the teeth2is twelve, and the stator4has the twelve teeth2sequentially disposed along a circumferential direction thereof. The excitation wire7is wound around the first, second, third, seventh, eighth, and ninth teeth2in a concentrated fashion to generate an identical polarity and wound around the fourth, fifth, sixth, tenth, eleventh, and twelfth teeth2in a concentrated fashion to generate a polarity which is reverse to the formerly mentioned polarity. The SIN output wire8is wound around the first, second, third, seventh, eighth, and ninth teeth2in a concentrated fashion to generate alternating polarities. The COS output wire9is wound around the fourth, fifth, sixth, tenth, eleventh, and twelfth teeth2in a concentrated fashion to generate alternating polarities.

REFERENCES:
patent: 4631510 (1986-12-01), Nagarkatti et al.
patent: 5757182 (1998-05-01), Kitazawa
patent: 8-178611 (1996-07-01), None

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