| 摘要 |
<p>PURPOSE:To obtain a magnetic core having an inductance value which is large in the region of a low current, but becomes small in the region where the current has a constant value, and becomes constant thereafter, by a constitution wherein laminated magnetic bodies being different in the volume ratio, having two kinds or more magnetic characteristics and being formed of an amorphous alloy, are arranged in the vicinity of a gap formed between iron cores. CONSTITUTION:Two E-type cores 3 and 4 are combined with their magnetic legs opposed, and a gap Ga is formed between short center core parts 3a and 4a. Next, magnetic bodies 5A and 5B are arranged addtionally in such a manner that they are positioned on the opposite sides of the gap Ga and enclose the core parts 3a and 4a through the intermediary of a gap g1. These magnetic bodies are formed of composite resin ferrite or the like which is prepared by mixing the powder of an amorphous alloy, permalloy, silicon steel or ferrite with synthetic resin, have different volume ratios and are laminated to form a magnetic body 5. By this constitution, the inductance can be increased sharply when a load is light, and an output is remarkably stabilized.</p> |
