JPS57197816A - Shunt reactor - Google Patents

Abstract

PURPOSE:To reduce the capacity of control winding for small equivalent capacity of a reactor contriving small-size, light weight and low cost, by using an iron core having a gap for the main iron core with a control winding wound on the outside of the main winding. CONSTITUTION:When a switch 5 is open, a main magnetic flux passes through the main iron core 1 for reflux through yoke iron cores 4A, 4B. In this case, the gap 11 exists in the main iron core 1 then to pass lagging ineffective current with the magnetic reluctance there of with the capacity of the reactor not zero for some value of capacity. Next, when the switch 5 is closed for the short circuit of the control winding 3, the magnetic flux interlinking with the control winding 3 is eliminated. However, since the magnetic flux interlinking with the main winding 2 is a constant value constrained by the power source voltage of the line, the main magnetic flux passes through the main iron core 1 for reflux via the space between the both windings, 2, 3. Therefore, the magnetic reluctance of magnetic flux increases for the capacity of the reactor at 100%.