SMOOTHING-CURRENT-LIMITING REACTOR OF FILTER DEVICE OF RAILWAY TRACTION SUBSTATION Russian patent published in 2019 - IPC H01F38/02 H01F29/10 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used on existing and newly designed sections of railway and industrial transport, as well as subways. Smoothing reactor comprises at least one unit comprising inductance coil (2) coaxially arranged relative to sectioned non-magnetic gaps of rod (1) with winding from litzendraht, placed in non-magnetic medium with high electric strength. Structural elements of ferromagnetic rod (1) are made in the form of cylinders of low height, having a radial slot, which prevents flow of induced ring currents and performs input of inductance coil (2) inside radial-cylindrical armored rod-shaped magnetic system (3, 4) from ferromagnetic material. Coil is isolated from the rod, oriented vertically and rests on supporting dielectric structures. Radial-cylindrical armored rod-type magnetic system includes ferromagnetic rod (1) arranged coaxially at the center of coil (2), yoke flanges (3) and outer shell (4) closing magnetic flux F_m. Magnetic flow F_m is formed by rectified load current I_l. Contained in I_l variable component directs directly to conversion coefficient in yoke flanges (3) and outer shell (4) annular currents I_a, each of which passes at depth of skin-layer at its characteristic frequency and attenuates with release of thermal energy on active resistance of short-circuited turns.

EFFECT: reduced exchange of reactive energy with a converter, reactive voltage drop, transformation of electromagnetic radiation into Joule heat, reduced losses, improved quality of electric power in a traction network.

1 cl, 1 dwg