Reactor and manufacturing method for reactor
First Claim
1. A reactor comprising:
- a coil formed by winding a wire;
a magnetic core that is disposed inside and outside of the coil and forms a closed magnetic circuit; and
a case that has an opening portion and a bottom surface that opposes the opening portion, an assembly of the coil and the magnetic core being housed in the case,wherein at least the opening portion of the case side of the magnetic core is formed of a molded solid body that contains magnetic powder and resin,wherein a surface layer is provided on a surface of the magnetic core on the opening portion of the case side, the surface layer preventing the magnetic powder from rusting,wherein the surface layer has a resin portion formed of resin similar to the resin contained in the magnetic core, the resin portion being formed so as to be continuous with the resin contained in the magnetic core without an interface formed therebetween,wherein the resin portion of the surface layer and the resin contained in the magnetic core are integrated with each other in tight contact,wherein the molded solid body covers at least part of an outer periphery of the coil, andwherein the magnetic powder contained in the molded solid body is sparsely distributed on the opening portion of the case side and densely distributed on the bottom surface of the case side.
1 Assignment
0 Petitions
Accused Products
Abstract
A reactor 1α includes a coil 2 formed by winding a wire 2w, a magnetic core 3 that is disposed inside and outside of the coil 2 and forms a closed magnetic circuit, and a case 4 that has an opening portion and a bottom surface 40 that opposes the opening portion and that houses an assembly 10 of the coil 2 and the magnetic core 3. At least the opening portion of the case 4 side of the magnetic core 3 is formed of a molded solid body that contains magnetic powder and resin. A surface layer 5, which prevents the magnetic powder from rusting, is provided on a surface of the magnetic core 3 on the opening portion of the case 4 side. The surface layer 5 has a resin portion formed of resin similar to the resin contained in the magnetic core 3. The resin portion is formed so as to be continuous with the resin contained in the magnetic core 3 without an interface formed therebetween.
8 Citations
6 Claims
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1. A reactor comprising:
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a coil formed by winding a wire; a magnetic core that is disposed inside and outside of the coil and forms a closed magnetic circuit; and a case that has an opening portion and a bottom surface that opposes the opening portion, an assembly of the coil and the magnetic core being housed in the case, wherein at least the opening portion of the case side of the magnetic core is formed of a molded solid body that contains magnetic powder and resin, wherein a surface layer is provided on a surface of the magnetic core on the opening portion of the case side, the surface layer preventing the magnetic powder from rusting, wherein the surface layer has a resin portion formed of resin similar to the resin contained in the magnetic core, the resin portion being formed so as to be continuous with the resin contained in the magnetic core without an interface formed therebetween, wherein the resin portion of the surface layer and the resin contained in the magnetic core are integrated with each other in tight contact, wherein the molded solid body covers at least part of an outer periphery of the coil, and wherein the magnetic powder contained in the molded solid body is sparsely distributed on the opening portion of the case side and densely distributed on the bottom surface of the case side. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification