Three-phase choke coil device for filter circuit utilized for output sinusoidal filter of frequency converter, has yokes that are linked with each other such that magnetic fluid flows into legs in leg direction

摘要

The device (14) has two closed three-legged cores (26, 28) and three windings (30), where each winding comprises leg (32, 38) that are linked together. One of the cores (26) has an air gap. Other core has three connection legs (44) and yokes (40, 42, 46). The yokes are linked with each other such that magnetic fluid flows into the legs (32, 38) in a leg direction. The three-legged cores are concentrically arranged relative to one another. The yokes are formed in arc-shape. The legs of the cores are arranged on a symmetry axis.