Magnetic speed sensor

Details Magnetic speed sensor Magnetic speed sensor

1974-06-13

1976-03-30

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310168, H02K 2138

Patent

active

039477118

ABSTRACT:
A speed sensor for a vehicle wheel has a rotating tone wheel and a stationary E-shaped magnetic sensor having a sensing pole of square loop magnetic material positioned between two switching poles. A coil is wound on the sensing pole and the poles are magnetized to periodically reverse the flux in the sensing pole as the teeth on the tone wheel alternately pass the switching poles to induce a signal voltage in the coil corresponding to wheel speed and substantially free of noise components due to misalignment and vibrations of the tone wheel upon relative rotation of the tone wheel and magnetic sensor.

REFERENCES:
patent: 3509390 (1970-04-01), Loughlin et al.
patent: 3710158 (1973-01-01), Bachle et al.
patent: 3739204 (1973-06-01), Sugawara et al.
patent: 3825782 (1974-07-01), Dassler

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