ELECTRICAL MACHINE ROTOR MAGNETIC SYSTEM Russian patent published in 2015 - IPC H02K1/27 H02K21/14 

FIELD: electricity.

SUBSTANCE: rotor magnetic system contains the magnetic conductor fixed on a shaft from magnetosoft material without gaps along external and internal diameters with a hole for mounting of a permanent magnet. The magnet is formed by separate elements of four in the case under consideration (by number of poles) hollow cylindrical permanent magnets. The hole for magnet is designed without gaps, has a wavy form, symmetric with reference to the shaft axis, with identical distances between tops of the wave edges located near the rotor boring and located from it at identical distance. The elements of permanent magnets placed in the hole have identical magnetic polarity between each couple of neighbouring tops of the wavy hole. This polarity changes to opposite at each passing of a top.

EFFECT: increase of magnetic flux in the air gap of the electrical machine.

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