SUBMERGED MOTOR STATOR Russian patent published in 2008 - IPC H02K1/18 H02K1/12 H02K5/132 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly, to the motor designs that feature a large length-to-diameter ratios and can be used in developing of submerged motors intended for driving submerged pumping units in oil production. The invention novelty consists in that the submerged motor stator with the large length-to-diameter ratio and made up of a cylindrical casing accommodating a cylindrical stacked magnetic circuit with a winding arranged with a minimum backlash therein features the outer surface of the said magnetic circuit furnished with, at least, two lengthwise symmetric grooves made in the teeth radial axes of symmetry, the groves depth being selected subject to their minimum effect on magnetic flux in motor operation and being filled with a compound composition.

EFFECT: production of submerged synchronous motor stator with rigid magnetic circuit that feature large length-to-diameter ratio and minimum departure from rated sizes allowing reliable magnetic circuit attachment inside stator casing.

3 cl, 1 dwg