ELECTROMAGNETIC GEAR Russian patent published in 2014 - IPC H02K16/02 H02K51/00 

FIELD: electricity.

SUBSTANCE: in electromagnetic gear containing a housing with mounted stator with multiphase winding coupled to the voltage source as well as the first and second rotors rigidly fixed at the input and output shafts respectively, according to the invention stator winding is coupled to the voltage source through a regulated frequency converter and placed in grooves of the stator inner surface thus forming poles. The first rotor mounted coaxially with stator and fixed rigidly to the input shaft end is made as a squirrel cage, which rods inserted to rings made of non-magnet material form teeth of this rotor with height equal to a half width of the groove, and the second rotor placed inside the first one is made with grooves at its outer surface and short-circuited winding is placed to them, at that the stator, teeth of the first rotor and teeth of the second rotor are laminated and made of ferromagnetic thin steel plates.

EFFECT: simplifying design with potential regulation of reduction ratio.