| 摘要 |
PURPOSE:To obtain an magnetic core characterized by low iron loss by using a part of wound laminated body as a laminated part wherein the roll surfaces of metal thin strips or the free surfaces thereof are arranged so as to face each other at the neighboring positions. CONSTITUTION:An amorphous alloy thin strip 2 is divided into two parts in the longitudinal direction. Roll surfaces 2a are overlapped together or free surfaces 2b are overlapped together. The two layers are wound and laminated on a winding jig having a specified shape, and a wound body 1 is formed. Then, heat treatment is performed for the wound body 1. Thereafter, the body is impregnated with an epoxy resin. Hardening treatment is performed, and the wound body 1 is fixed. The body is cut into two parts at a specified position. Thus a rectangular cut core for a high frequency transformer is obtained. Namely, in the wound body 1, the roll surfaces 2a and the free surfaces 2b of the amorphous alloy thin strips 2 are arranged so that the surface 2a faces the surface 2a and the surface 2b faces the surfaces 2b at the neighboring positions. The thicknesses of the wound layers at both end parts of the thin strip 2 in the direction of the width become approximately equal. The stress distribution of the entire wound body becomes approximately uniform. In this way, the magnetic core having low iron loss and excellent magnetic characteristics is obtained. |
