Hitachi Metals, Ltd.

Mutsuhito Sakaguchi

Shin Nakajima

Hirohiko Miki

Sadami Kubota

Ryouji Zenitani

Akira Itoh

Shintaro Higashida

A coil device comprising a pair of coil members annularly assembled at two connecting end portions; each coil member comprising a magnetic core, a resin case substantially entirely surrounding the magnetic core, and a coil wound around the resin case; the resin case having connecting means and guide means in the connecting end portion of each coil member; and the connected coil members being adhered to each other in the connecting end portions.

Coil device

The invention is directed to a surface mountable reactor including: a coila first magnetic coreincluding an axial portionaround which the coilis disposed and flange portionsandat both ends thereof; a second magnetic coredisposed outside the coilto connect the flange portions of the first magnetic coreand a resin mountdisposed outside the coilwherein the second magnetic coreincludes a plurality of componentsandseparable toward outside the coilthe circumference of the coilis surrounded by the second magnetic coreand the resin mountand the coilhas end portionsdisposed outside the resin mount, and to a method for fabrication thereof.

Surface-mounted reactor and manufacturing method therefor

A case unit for containing an annular magnetic core and a coil, which comprises a first case having an annular portion having an annular space for receiving the annular magnetic core, around which the coil is wound, and pluralities of legs extending from the annular portion to one side; and a second case engaging the first case, such that it enters gaps between the annular portion and legs of the first case, and covers part of the annular portion from the one side; a first fixing portion of each leg of the first case and each second fixing portion of the second case being overlapped and fixed to a substrate.

Case unit and electronic device

A magnetic core for use in a saturable reactor made of an Fe-based soft-magnetic alloy comprising as essential alloying elements Fe, Cu and M, wherein M is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and having an alloy structure at least 50% in area ratio of which being fine crystalline particles having an average particle size of 100 nm or less. The magnetic core has control magnetizing properties of a residual operating magnetic flux density &Dgr;Bb of 0.12 T or less, a total control operating magnetic flux density &Dgr;Br of 2.0 T or more, and a total control gain Gr of 0.10-0.20 T/(A/m) calculated by the equation: Gr&equals;0.8&times;(&Dgr;Br&minus;&Dgr;Bb)/Hr, wherein Hr is a total control magnetizing force defined as a control magnetizing force corresponding to 0.8&times;(&Dgr;Br&minus;&Dgr;Bb)&plus;&Dgr;Bb.

Magnetic core for saturable reactor, magnetic amplifier type multi-output switching regulator and computer having magnetic amplifier type multi-output switching regulator

Growing community of inventors

Tottori, Japan

Mutsuhito Sakaguchi