ONE-PHASED INDUCTIVE ELECTRIC MOTOR Russian patent published in 2007 - IPC H02K17/08 H02P1/42 

FIELD: electric engineering, one-phased inductive electric motors.

SUBSTANCE: one-phased inductive electric motor contains rotor, stator having a row of grooves on it, main and auxiliary windings, placed in stator grooves. Auxiliary winding contains first and second part. First and second parts of auxiliary winding contains two coils, connected in parallel. First coil of second part of auxiliary winding is additionally connected to first coil of its first part. Second coil of second part of auxiliary winding is additionally connected to second coil of its first part in such a way, that second part of auxiliary winding is formed by winding aforementioned coils from one end of its first part. Auxiliary winding is made in such a way, that number of coils, which let current through, changes depending on electric motor operation mode. During launch of electric motor the number of auxiliary winding coils, which let current through, is reduced, thus increasing efficiency in launch mode. When electric motor reaches normal mode of operation, number of auxiliary winding coils, which let current through, increases, thus increasing efficiency in normal operation mode.

EFFECT: increased efficiency in both launching and working modes.

7 cl, 9 dwg