Slotted magnetic core, coil component using same, and manufacturing method of coil component

Abstract

The present invention provides a gapped core that facilitates adjustment of DC bias characteristics, has little variation in those characteristics, and also allows for excellent manufacturing efficiency. A gapped core (10) according to the present invention has a main body (30) and a segment (40) that are obtained by a molded core (20) including an annular magnetic body made of a magnetic material and a resin covering part that covers the magnetic body being cut at a first cutting part and a second cutting part that transect an outer peripheral surface and an inner peripheral surface and approach each other toward an inner periphery of the molded core, the main body (30) having a main body-side first end face formed by cutting at the first cutting part and a main body-side second end face formed by cutting at the second cutting part, and the segment (40) having a segment-side first end face formed by cutting at the first cutting part and a segment-side second end face formed by cutting at the second cutting part, the segment being disposed in a cutout part (31) formed between the main body-side first end face and the main body-side second end face of the main body, and the main body-side first end face and the segment-side first end face and / or the main body-side second end face and the segment-side second end face opposing each other across a gap (11).

Description

technical field [0001] The present invention relates to a magnetic core used for a coil component of a rectifier circuit, a noise prevention circuit, a resonant circuit, etc. equipped in AC equipment such as a power supply circuit and an inverter, a coil component using the core, and a method for manufacturing the coil component. Background technique [0002] A coil device mounted in a circuit of various AC equipment includes a coil component in which a coil is wound around an annular magnetic core. [0003] In order to easily wind the coil on the magnetic core, the following coil components have been proposed. The coil component forms a magnetic core partially formed with a void, inserts a pre-wound air-core coil through the void, and then uses magnetic or a non-magnetic filling material to backfill the gap, using the gap as a gap (for example, refer to Patent Document 1 Figure 10 ). [0004] On the other hand, the applicant proposes a gapless magnetic core in which a rin...

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Problems solved by technology

[0007] In the gapless magnetic core proposed in Patent Document 2, there is a problem in that since the inductance and the magnetic saturation current are determined by the characteristics of the magnetic material, a desired range of DC superposition characteristics suitable for various power supply circuits is obtained. restricted

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