Unit Block Used in Manufacturing Core with Soft Magnetic Metal Powder, and Method for Manufacturing Core with High Current Dc Bias Characteristics Using the Unit Block
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United States of America Patent
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Issued Date -
Oct 11, 2007
app pub date -
Oct 22, 2004
filing date -
Oct 24, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A unit block for a core using soft magnetic metal powder, a core having excellent high-current DC bias characteristics using the unit block, and a method of producing the core are disclosed. The unit block is used to produce cores applied to an active filter for PFC, a three-phase line reactor, or an inductor for automotive electronics. A method of producing the core comprises mixing sendust alloy, High Flux, MPP, or silicon steel powders, which have an average particle size of 175 gm or less, with a solid lubricant; compacting a mixture at a pressure of 10-18 tons per unit area; heat-treating the compacted mixture at 600-800.degree. C. for 1-2 hours to form the unit blocks each having a length of 3-10 cm, a width of 1-5 cm, and a height of 1-5 cm; and attaching the unit blocks using a heat- and fire-resistant adhesive.
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