Patent ID: 8497756

Claim:
A core of a reactor which is formed in an annular shape, the annular core comprising: a gap portion between a plurality of core materials fixed by adhesion via a spacer, wherein at least one of the core materials includes a powder magnetic core containing a magnetic material which is treated with insulation processing, and wherein the core further comprises: a supporting material which covers an outer peripheral surface of the annular core so as to support at least a portion of the core materials in a direction vertical to an adhesion surface between the core materials and the spacer; and a coil bobbin which allows a coil to be provided around the core, the coil bobbin including an inner peripheral side coil bobbin disposed on an inner peripheral surface of the annular core and an outer peripheral side coil bobbin which is disposed opposite the inner peripheral side coil bobbin and disposed on an outer peripheral surface of the annular core, and the inner peripheral side coil bobbin being integrally molded with the supporting material, and wherein at least a portion of an outer peripheral surface of the supporting material functions as the outer peripheral side coil bobbin and the coil is wound around the inner peripheral side coil bobbin and the outer peripheral side coil bobbin.