REACTOR AND MANUFACTURING METHOD OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a reactor which can reduce the content of a filler and efficiently radiate heat.

SOLUTION: A reactor 1A includes: an assembly body 10A having a coil 2 formed by winding a winding wire 2w and a magnetic core 3 disposed outside and inside the coil 2 and forming a closed magnetic circuit; and an outer resin part 5 covering an outer periphery of the assembly body 10A. The reactor 1A is installed on a cooling base for heat radiation. The outer resin part 5 includes: heat radiation layers 51 formed on the side located close to the cooling base; and protection layers 52 laminated on surfaces of the heat radiation layers 51 which are the opposite sides of the cooling base. The heat radiation layers 51 are formed by an insulation material including a resin. The protection layers 52 are formed by an insulation material including a resin and having the heat conductivity lower than that of the heat radiation layers 51. A formation region of each heat radiation layer 51 is a region ranging from a surface of the outer resin part 5 which faces the cooling base to at least a surface of the coil 2 located close to the cooling base.

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