Induction-type rotational position detecting device

Details Induction-type rotational position detecting device Induction-type rotational position detecting device

1996-08-07

1999-05-11

Luebke, Renee S.

Inductor devices

Relatively movable core and coil

336132, 336134, 336135, H01F21/06

Patent

active

059032057

ABSTRACT:
A group of secondary windings are distributively provided on a stator over a predetermined range, and the respective inductance of the secondary windings in the group is set in such a manner to present predetermined inductance distribution. A rotor has an eccentric shape so as to cause variations in magnetic coupling at individual poles of the stator in response to its current rotational position. By combined use of the magnetic coupling variations between primary and secondary windings on the stator and the predetermined inductance distribution of the secondary windings, high-accuracy detection of a rotational position is achieved with a simple structure. A plurality of primary windings may be set so as to present predetermined inductance distribution.

REFERENCES:
patent: 2484022 (1949-11-01), Esval
patent: 3273096 (1966-09-01), Lipshutz
patent: 3641467 (1972-02-01), Ringland et al.
patent: 4631510 (1986-12-01), Nagarkatti et al.
patent: 4743786 (1988-05-01), Ichikawa et al.
patent: 4754220 (1988-06-01), Shimizu et al.
patent: 5189353 (1993-02-01), Ezuka
patent: 5349293 (1994-09-01), Tanaka et al.

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