JPS5749213A - Branch reactor - Google Patents

Abstract

PURPOSE:To reduce the size and weight of a branch reactor by providing a plurality of gaps at a main core on which a controlling winding opened in shortcircuit selectively at both ends and a main winding surrounding the outside of the controlling winding are wound, thereby enabling the reduction in the sectional area of the main core. CONSTITUTION:Yoke cores 4A, 4B are connected to both ends of a main core 1 to form a closed magnetic path, a controlling winding 3 is wound on the main core 1, and a shortcircuitting switch 5 is connected to both ends of the winding 3. A main winding 2 surrounding the winding 3 is provided around the periphery of the winding 3, thereby forming a branch reactor. With this construction, the main core 1 is not formed in an ordinary block, but is constructed to stack a plurality of block cores 12 via gaps 11 in a columnar shape. When the switch 5 is thus opened, a part of the magnetic flux does not pass the main core 1 due to the existence of the gaps 12, but passes the outside space through the yoke cores 4A, 4B and is circulated, and when the switch 5 is closed, the magnetizing current is further increased to obtain large reactive current.