Automotive wheel speed sensor assembly with stator pole piece ca

Details Automotive wheel speed sensor assembly with stator pole piece ca Automotive wheel speed sensor assembly with stator pole piece ca

1989-02-02

1990-11-06

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

73519, 188181R, 310168, G01P 3488, B60T 832, H02K 2126

Patent

active

049689339

ABSTRACT:
There is described a speed sensor that is particularly adaptable to moving vehicles such as automobiles. A permanent magnet, stator assembly including a stator pole piece, and field coil having an aperature are held within a cup that is adapted to mate a bearing assembly of a non-driven wheel of the vehicle. The stator pole piece is carried substantially within the aperature of the field coil. Rotor poles are carried on the wheel spindle. A magnetic flux is provided by the permanent magnet, the flux passing through the stator poles and the rotor poles which rotate with the wheel in close proximity to the stator assembly, causing a changing flux field. The changing magnetic flux in turn generates an alternating voltage current in the field coil. The alternating current so generated is then fed through an electrical terminal to a vehicle computer.

REFERENCES:
patent: 2798976 (1957-07-01), Eckel et al.
patent: 3619678 (1971-11-01), Ruof
patent: 3683219 (1972-08-01), Kruse
patent: 3870911 (1975-03-01), Toyama et al.
patent: 3960248 (1976-06-01), Tribe
patent: 4027753 (1977-06-01), Lantz
patent: 4096624 (1978-06-01), Gray et al.
patent: 4529933 (1985-07-01), Bleeke
patent: 4689557 (1987-08-01), Smith et al.

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