Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-07-29
1997-02-04
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
3242072, H02K 2908, H02K 1100
Patent
active
056001924
ABSTRACT:
A support substrate having an array of magnetically responsive sensors is mounted within the housing of a brushless DC motor in a plane perpendicular to the axis of the motor shaft having commutating magnets thereon. A ferromagnetic flux concentrating member in the form of a generally planar disc having an annular rim with radially inwardly directed spokes is mounted to the support substrate. Each spoke has a radial gap therein. A magnetically responsive sensor is received within each radial gap. The gap may divide the spoke into two discrete gap segments, or may alternatively form an enclosed recess with generally radially extending sidebars along each lateral edge of the spoke. The flux concentrating member conducts magnetic flux emanating from one magnetic pole to and through each of the magnetically responsive sensors and returns the flux to the other pole, such that, as the shaft is rotated, each of the magnetically responsive sensors is at substantially all times under the influence of magnetic flux emanating from one of the commutating magnets.
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Carson David M.
Fleming John A.
Miranda, Jr. Victor W.
Jones Judson H.
Sorvall Products, L.P.
Stephan Steven L.
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