Development of a Magnetic-Flux-Control-Type Variable Inductor

In a previous paper, we proposed a 3-phase variable inductor, which has a sinusoidal output current and good controllability. We developed a var compensator for a 6.6 kV ac distribution system using the 3-phase variable inductor, which is composed of three orthogonalcores that have wedge gaps for reducing the harmonics in the output current. To reduce the eddy current loss, the orthogonalcore needs a proper insulation film between the primary and the secondary core. When an apparatus is scaled up,