SYNCHRONOUS ELECTRIC MOTOR FOR HELICOPTER SCREW Russian patent published in 2019 - IPC H02K21/24 H02K19/06 H02K1/30 H02K16/00 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used as a compact helicopter rotor drive. Synchronous motor comprises housing 1 and bearing shields 2, 3. Magnetic circuits 4, 5 of stator with teeth and coils 6, 7 are installed on them. Stator discs 10, 11 are secured at stator sleeves 8, 9. Stator discs 10, 11 and rotor disks 14, 15 have ferromagnetic and nonmagnetic elements in the form of sectors and alternate in space. Amount of ferromagnetic elements on stator disc z_c and on rotor disk z_p are related by equality z_p=z_c±2p, where p is number of pole pairs of stator winding. Shaft 21 rests on bearings 18, 19 installed in bearing shields 2, 3. Permanent magnets 17 in the form of sectors are magnetized axially and installed on rotor-inductor, which rests on bearing 20, installed in middle on shaft 21. Rotor and rotor-inductor are arranged on hubs 12, 13, 16.

EFFECT: improvement in mass-dimensional parameters.

1 cl, 8 dwg