Lamination structure for an electromagnetic device

Details Lamination structure for an electromagnetic device Lamination structure for an electromagnetic device

1998-06-01

2000-01-11

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Linear

H02K 4100

Patent

active

060139595

ABSTRACT:
A lamination structure for an electromagnetic device such as a linear machine having a coaxially aligned field assembly and armature assembly. In one embodiment, the field assembly reciprocates relative to the armature assembly to actuate the valve. One configuration has a field assembly with a number of axially oriented annular permanent magnets separated by a ferromagnetic material comprised of a stack of relatively thin ferromagnetic discs which are oriented such that the geometric planes of the discs are generally perpendicular to the working magnetic field and mounted on a non-magnetic shaft. The discs are sized to optimize the conduction of the working magnetic flux while minimizing eddy currents. The housing for the device is comprised of a plurality of tubular laminations. The preferred construction provides a reluctance force which helps maintain the valve in an open or closed state without any current applied to the device.

REFERENCES:
patent: 4211944 (1980-07-01), Haller

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