Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1978-05-11
1980-04-29
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
340672, H02K 1924
Patent
active
042008166
ABSTRACT:
A wheel speed sensor including an annular rotor rotatable with a wheel, or the like, has circumferentially distributed surface interruptions. A sensing device fixed against rotation faces the rotor and includes a source of magnetic flux and a coil to generate an electrical signal variable with changes in the magnetic flux through the coil. The sensing device further includes first and second pole members extending from opposite poles of the flux source and spaced so that one pole member opposes a surface interruption on the rotor while the other faces the rotor surface between surface interruptions, and vice versa, to provide a magnetic flux path between the rotating rotor and alternating ones of said first and second pole members. A third pole member extends past the coil and has one end opposing the rotor and wider than the surface interruptions to maintain continuous flux transferring relation with the rotor. The third pole member at its other end is coupled to a coil core extending through the inside diameter of the coil. The coil core is connected to a shunt which in turn is positioned to establish two predetermined air gaps between the first and second pole members respectively. As the rotor rotates, the resulting flux in the coil core alternates in direction as the first and second pole members traverse the rotor spaces alternately.
REFERENCES:
patent: 3854556 (1974-12-01), Gee
patent: 3917997 (1975-11-01), Sidor
patent: 3937994 (1976-02-01), Presley
patent: 3938112 (1976-02-01), Gee
patent: 3942045 (1976-03-01), Palazetti
patent: 3947711 (1976-03-01), Presley
patent: 3961215 (1976-06-01), Gee
patent: 3980913 (1976-09-01), Peterson
patent: 3988624 (1976-10-01), Urban
patent: 4097756 (1978-06-01), Gee
Eaton Corporation
Skudy R.
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