| 摘要 |
PROBLEM TO BE SOLVED: To obtain a direct current reactor having a structure in which it is easy to assemble permanent magnets, further the whole fixing can be made including the permanent magnets without varying the performance or dimensions, and further it is easy to fix to an external unit. SOLUTION: A "square frame"-shaped core 3 is constituted of an upper side 3a, both-side legs 3b, 3b and a lower side 3c, and a recess 3d is provided at the center of the lower side 3c so that, when an I core 1 with a wound a coil 2 is inserted thereinto, the coil 2 of the I core 1 keeps a predetermined magnetic air gap 4 relative to an unwound side. Further, a groove 3e is provided at the center of the recess 3d so as to fix a biasing permanent magnet 5 with a magnet width Lm1. An upper surface of the I core 1 comes into contact with an abutment surface 6 of the upper side 3a of the "square frame"-shaped core 3, and further the permanent magnet 5 is provided so as to directly come into contact with a lower surface of the I core 1 and the groove 3e of the "square frame"-shaped core 3, respectively. COPYRIGHT: (C)2004,JPO&NCIPI
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