Wound core and method for manufacturing wound core

Abstract

The wound core in this embodiment is obtained by winding a plurality of sheets of core material, each of which has at least one cut point, and has a rectangular hole in the middle. The space factor of the core material in corner sections is lower than the space factor of the core material in non-corner side sections.

Description

technical field [0001] Embodiments of the present invention relate to a wound core in which a plurality of core materials are coiled, and a method for manufacturing the wound core. Background technique [0002] In recent years, for example, the so-called "top runner" system has been adopted in Japan as a major technological trend in small transformers for power distribution, and energy conservation and efficiency have been vigorously promoted in the world, such as drafting standards for high efficiency. In particular, efforts to reduce no-load loss, the so-called "iron loss" that is the power loss generated in the iron core, are being carried out worldwide, and manufacturers are widely engaged in fierce competition for improvement of iron core materials and iron core structures. . Among them, as iron cores for transformers, laminated iron cores in which cut thin silicon steel sheets are laminated, and coiled iron cores in which cut thin silicon steel sheets are coiled are k...

AI Technical Summary

Problems solved by technology

In addition, especially in the coil assembly process, it is necessary to fasten the wound core as described above, which leads to an increase in manufacturing man-hours.

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