ROTARY FREQUENCY CHANGER (VERSIONS) Russian patent published in 2013 - IPC H02K47/20 H02K47/18 

FIELD: electricity.

SUBSTANCE: rotary frequency changer according to the first version (version 1) comprises a stator of an induction motor with a number of poles p₁, a rotor of an induction motor with a short-circuited winding, besides, the rotor of the induction motor is hollow and additionally comprises a coaxial rotor of a synchronous generator of reverse type with a number of pole pairs p₂. Inside the rotor of the synchronous generator there is a stator of the synchronous generator, the stator of the induction motor comprises switched windings with the number of pole pairs p₁, p₃, p₄, besides p₁ ≠ p₂, p₃ ≠ p₂, p₄ ≠ p₂; p₁ ≠ p₃ ≠ p₄, between the rotor of the induction motor and the rotor of the synchronous generator there is a bushing, providing for absence of the magnetic connection between them. A rotary frequency changer according to the second version (version 2) comprises a stator of an induction motor with number of pole pairs p₁ and a rotor of a synchronous motor with permanent magnets. Besides, the rotor of the synchronous motor is hollow and additionally comprises a coaxial rotor of the synchronous generator of reverse type with a number of pole pairs p₂. Besides, inside the rotor of the synchronous generator there is a stator of the synchronous generator with the number of pole pairs p₂, between the rotor of the induction motor and the rotor of the synchronous generator there is a bushing, which provides for absence of the magnetic connection between them.

EFFECT: higher reliability and improved weight and dimension characteristics of a rotary frequency changer.

8 cl, 2 dwg