Patent ID: 8416044

Claim:
A reactor comprising: a coil composed of a spirally-wound conductive wire, and generating magnetic field when a current flows in the coil; and a core placed in an inside area and the outer peripheral area of the coil in a container in which the coil and the core are placed, wherein the core is solidified and made of a magnetic-powder resin mixture composed of magnetic powder, non-magnetic powder, and resin, the non-magnetic powder is composed of main component powder and a low elastic modulus powder, the main component powder, as a main component of the non-magnetic powder, being made of one or more kinds of powder of a heat conductivity which is larger than that of the resin, and the low elastic modulus powder is made of one or more kinds of powder of an elastic modulus which is smaller than that of the main component powder, a quantity of the main component powder having an elastic modulus, which is larger than an elastic modulus of the low elastic modulus powder, is larger than a quantity of the low elastic modulus powder, and a mixture of the main component powder, the resin, the magnetic powder and the low elastic modulus powder is place in the inside area and the outer peripheral area of the coil in the container.