Conductive rotational position detection device having stator an

Details Conductive rotational position detection device having stator an Conductive rotational position detection device having stator an

1992-08-25

1994-09-20

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420722, 32420725, G01B 730

Patent

active

053492935

ABSTRACT:
Primary coils generate flux upon being excited by a predetermined ac signal. A stator is made in a plate-like configuration and has plural primary coils independently in the circumferential direction so that flux is generated by the primary coils in the direction of the axis of rotation. A rotor is provided displaceably relative to the primary coils to change reluctance with respect to the flux generated by the primary coils. Accordingly, as the rotor is rotated, reluctance change is produced due to the relative positional relation between the primary coils provided in the stator and the rotor. This reluctance change causes to change self-inductance of the primary coils and affects the exciting ac signal flowing through the primary coils and, therefore, by outputting the self-induced ac signal in the primary coils, the relative positional relation between the rotor and the primary coils, i.e., the rotational position of the rotor, can be detected.

REFERENCES:
patent: 3297940 (1967-01-01), Mulligan et al.
patent: 4604575 (1986-08-01), Shimizu et al.
patent: 4612503 (1986-09-01), Shimizu et al.
patent: 4754220 (1988-06-01), Shimizu et al.
patent: 4851770 (1989-07-01), Fiori, Jr.
patent: 4983915 (1991-01-01), Rossi
patent: 5025213 (1991-06-01), Dobler et al.
patent: 5083084 (1992-01-01), Bauer et al.

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