Revolving speed detecting device with reduced eddy current loss

Details Revolving speed detecting device with reduced eddy current loss Revolving speed detecting device with reduced eddy current loss

1992-12-22

1999-11-16

Strecker, Gerard

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324163, 384448, G01P 344, G01P 346

Patent

active

059864486

ABSTRACT:
A revolving speed detecting device for use with a rolling contact bearing having a rotary ring and a fixed ring. It has a magnetic ring provided on the peripheral surface thereof with a plurality of teeth at equal pitches and mounted on the rotary bearing ring. A sensor made of soft ferrite or by laminating a plurality of silicon steel plates is mounted on the fixed bearing ring opposite to the teeth of the magnetic ring. A coil is wound around the sensor. A high-frequency voltage generator is connected to the coil. A detecting device for detecting the output voltage of the coil is also connected to the coil.

REFERENCES:
patent: 3716787 (1973-02-01), Hammond
patent: 3939416 (1976-02-01), Maskery
patent: 4001687 (1977-01-01), Sorkin et al.
patent: 4025934 (1977-05-01), Hartmann et al.
patent: 4121112 (1978-10-01), Hartig
patent: 4259637 (1981-03-01), Bloomfield et al.
patent: 4461994 (1984-07-01), MacDonald
patent: 4574237 (1986-03-01), Hachtel et al.
patent: 4652820 (1987-03-01), Maresca
patent: 4914387 (1990-04-01), Santos
patent: 5070264 (1991-12-01), Conrad
patent: 5107210 (1992-04-01), Shirao et al.

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