JP2015076474A5 - - Google Patents

Claims (5)

A case having an opening;
Coils,
A dust-radiating magnetic core having a heat dissipation path to the case;
An insulator;
It has a fixed resin that has electrical insulation,
At least the coil, the dust radiating magnetic core, and the insulator are accommodated in the case.
The gap in the case is filled with the fixing resin,
Of the surface of the dust radiating magnetic core, the insulator is disposed on at least a portion having a path from the coil surface,
A path for radiating heat generated in the coil to the case through the dust radiating magnetic core;
A magnetic flux that circulates around the coil of the dust radiating magnetic core generated by energization of the coil penetrates at least a part of the insulator.   The reactor according to claim 1, further comprising a lid that covers the opening. The case has one opening of the opening and a bottom facing the opening,
The reactor according to claim 1, wherein a winding axis of the coil is parallel to a direction from the center of the entire case toward the center of the opening.   The reactor according to any one of claims 1 to 3, wherein all surfaces of the pre-sintered powder heat radiation magnetic core are covered with the insulator. The insulator has a thickness of 0.3 mm or more,
The reactor according to any one of claims 1 to 4, wherein the dust core has a relative magnetic permeability of 50 or more.