Eddy current measuring device with flux return element

Details Eddy current measuring device with flux return element Eddy current measuring device with flux return element

1989-07-14

1990-11-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

73519, G01P 3495

Patent

active

049739050

ABSTRACT:
In an eddy-current measuring device, a permanent magnet (2) which is arranged fixed for rotation on a drive shaft (1) is magnetized axially. An eddy-current element (4) has the shaped of a disk and is located with slight axial spacing from the permanent magnet (2) on a pointer shaft (3). On the top of the eddy-current element (4) and below the permanent magnet (2), a congruent flux return element (8,9) is provided in each case.

REFERENCES:
patent: 4143538 (1979-03-01), Karsh et al.
patent: 4186609 (1980-02-01), Baermann
patent: 4371834 (1983-02-01), Bezard et al.

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