ELECTRICAL MACHINE Russian patent published in 2015 - IPC H02K51/00 

FIELD: electricity.

SUBSTANCE: electrical machine comprises magnetized rotor with rotation axis and stator with operating winding. The rotor is made as a dumbbell with cylindrical poles and its actuating coil fixed at the stator is installed between the above poles. The stator is made of two stator inserts used as stator poles of soft magnetic material fixed inside a hollow cylinder; they are shaped as hollow cylinders of soft magnetic material, and inner surface of each of them contains longitudinal slots parallel to axis of the rotor rotation, which are intended for conductor laying, with depth and width of slots equal or a little bit bigger that diameter of the winding wire. Outer surface is made with the same quantity of longitudinal slots but of double depth. In each magnet gap there are two windings - operating winding and compensating winding - with number of turns in each equal to the number of slots at stator inserts. The compensating winding is wound directly to stator inserts, wherein there are thin-wall cylinders of non-magnetic material. Working windings are wound at the formed pairs consisting of the stator insert with compensating winding and thin-wall cylinder of non-magnetic material with minimum permitted gap of operating winding from cylindrical surface of the rotor magnet poles and are connected in series to external source of direct current. Working and compensating windings for the respective rotor poles are connected in opposition.

EFFECT: improved reliability due to increased inner resistance of the operating winding.

5 dwg