MAGNETIC CORE AND COIL COMPONENT

• Main Authors: SAITO KENTARO, OKUBO HITOSHI, SATO TAKESHI, TONOYAMA KYOHEI, ASAI MIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 26.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

To provide a magnetic core and a coil component which are excellent in magnetic permeability, core loss and DC superposition characteristics and voltage resistance.SOLUTION: A magnetic core has a metal magnetic powder-containing resin containing metal magnetic powder. The metal magnetic powder-containing resin has metal magnetic powder. The metal magnetic power has large-diameter powder, middle-diameter powder, and small-diameter powder. The large-diameter powder has a particle diameter of 10 μm or more and 60 μm or less. The middle-diameter powder has a particle diameter of 2.0 μm or more and less than 10 μm. The small-diameter powder has a particle diameter of 0.1 μm or more and less than 2.0 μm. The large-diameter powder contains nanocrystals. An existence ratio of the large-diameter powder to the metal magnetic powder is 39% or more and 91% or less in terms of an area ratio in a cut surface of the magnetic core.SELECTED DRAWING: Figure 6 【課題】 透磁率、コアロス、直流重畳特性および耐電圧が優れる磁性体コアおよびコイル部品を提供する。【解決手段】 金属磁性粉を含む金属磁性粉含有樹脂を有する磁性体コアである。金属磁性粉含有樹脂は金属磁性粉を有する。金属磁性粉は、大径粉、中径粉および小径粉を有する。大径粉は粒子径が１０μｍ以上６０μｍ以下である。中径粉は粒子径が２．０μｍ以上１０μｍ未満である。小径粉は粒子径が０．１μｍ以上２．０μｍ未満である。大径粉はナノ結晶を含む。金属磁性粉に対する大径粉の存在割合は、磁性体コアの切断面における面積比率で３９％以上９１％以下である。【選択図】図６