Reactor and manufacturing method thereof

Abstract

A reactor comprises a reactor core in which two U-shaped core members are connected in a ring shape with a gap section therebetween, a primary insert-molded resin part provided covering at least an outer peripheral surface of a leg part of the core member other than an adhesion surface of the core member, a coil placed around the gap section and the leg part of the core member, and a secondary insert-molded resin part made of a thermoplastic resin and which is insert-molded around the coil to fix the coil on the reactor core and fix the leg parts of the core members in a connected state. A positioning section which determines a relative position of opposing leg parts and a window section which allows a melted thermoplastic resin for forming the secondary insert-molded resin part to flow into the gap section are formed on an end of the primary insert-molded resin part connected in a state where core members are placed connected in a ring shape.