Cylindrical core with toroidal windings at angularly spaced loca

Details Cylindrical core with toroidal windings at angularly spaced loca Cylindrical core with toroidal windings at angularly spaced loca

1976-03-15

1978-07-25

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, H02K 122

Patent

active

041031970

ABSTRACT:
A cylindrical core with toroidal windings at angularly spaced locations on the core, for example, as in the stator of a brushless, slotless DC motor for a record player or tape recorder, is formed of a plurality of annular core elements each having an axial slot and initially being axially superposed with the respective slots in axial alignment. The windings are conveniently formed individually on respective bobbins which are dimensioned to pass through the axially aligned slots for installation on the superposed core elements, whereupon, the latter are preferably turned relative to each other for angularly offsetting the respective slots and thereby minimizing the turbulence of magnetic flux that can result therefrom.

REFERENCES:
patent: 427405 (1890-05-01), Deprez
patent: 469080 (1892-02-01), Deprez
patent: 483700 (1892-10-01), Thomson

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