Method of making a permanent magnet field pole for a direct curr

Details Method of making a permanent magnet field pole for a direct curr Method of making a permanent magnet field pole for a direct curr

1977-10-25

1979-02-27

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29609, 310154, 310218, H02K 1502

Patent

active

041411374

ABSTRACT:
In the method of the invention a permanent magnet field pole is manufactured by welding a plurality of preformed base member laminae to thereby form a rigid pole base member. A plurality of preformed face member laminae are secured together by rods extending through aligned apertures therein. A head on one end of each such rod cooperates with a spring clip member affixed to the other end thereof to continuously exert a resilient clamping force on the laminae thereby retaining them in a relatively flexible desired pole face configuration. The rare earth magnet sub-assemblies are made by arranging rectangular magnet bars of rare earth material in aligned configurations then adhering the bars to parallel plates positioned on opposite sides of the bars. After the adhesive used to form the sub-assemblies is cured while the plates are compressed against the magnets, adhesive is applied to the outer surfaces of the pole face member, and to the inner surfaces of the pole base member, then the magnet sub-assemblies are positioned between these members and clamped in a desired position relative thereto while pressure is applied to maintain a predetermined compressive force on the pole assemblies as the adhesive is cured. Alternative mounting means are also disclosed for mounting the magnet bar sub-assemblies between the laminated pole members.

REFERENCES:
patent: 3441760 (1969-04-01), Collens
patent: 3885302 (1975-05-01), Boesel

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