Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Tsunetsugu Imanishi

Hidenori Uematsu

Nobuya Matsutani

Toshiyuki Nakata

Hiroyuki Hamamoto

Hidetoshi Hiwatashi

Tomonori Shibuya

Kazuaki Onishi

Munekazu Sato

Keiichi Nakao

Koji Nakashima

Tatsuo Maeoka

Toshiyuki Taniguchi

Tohru Ohnishi

Yusuke Ikeda

Shuji Sunano

Hitoshi Kouno

Tomokazu Kitagawa

A coil component comprising a first split magnetic core and a second split magnetic core, each having an outer core leg, an inner core leg and a back yoke connecting the outer core leg and the inner core leg, and a coil block mounted to the inner core leg, wherein the outer core leg has a sectional area smaller than a sectional area of the inner core leg, a density of magnetic body in the outer core leg is different from a density of the magnetic body in any of the inner core leg and the back yoke, and the first split magnetic core and the second split magnetic core are butted against each other to form a magnetic core of a closed magnetic circuit.

Coil component including magnetic body

The present invention relates to a heat dissipation structure board and a module using this heat dissipation structure used for purpose required of high reliability such as a hybrid vehicle or an electric vehicle and to a method of manufacturing the heat dissipation structure. A resin structure is disposed on a lead frame constituting a heat dissipation board and an odd-shaped electronic component or the like mounted on this lead frame or the like to cover up the lead frame and the odd-shaped electronic component or the like, and this resin structure is fixed to a metal plate, a chassis of a device and the like to constitute the heat dissipation structure board as a whole, whereby fixing strengths of fixing the lead frame and the odd-shaped electronic component or the like, a bonding strength at an interface between the lead frame and the heat transfer layer and the like can be reinforced.

Heat dissipating structure base board, module using heat dissipating structure base board, and method for manufacturing heat dissipating structure base board

A coil device includes first and second coils and a package for sealing the first and second coil. The first coil has a first winding including a first conductor wire wound about a first winding axis, and first and second ends which are both ends of the first conductor wire. The second coil has a second winding including a second conductor wire wound about a second winding axis, and third and fourth ends which are both ends of the second conductor wire. The second winding axis is arranged with the first winding axis. The second end of the first coil is connected with the third end of the second coil. The first end of the first coil and the fourth end of the second coil are adapted to be connected to an outside of the package. This coil device reduces magnetic flux leakage to outside of the package.

Coil device

The present invention provides a coil component and a method for making the coil component that includes: a coil section having a through hole and composed of a plurality of ring sections formed of a metallic flat plate disposed in a plane, connected to each other at ring connecting sections, having slits formed by cutting part of the ring sections, and bent at the ring connecting sections and placed one on top of another, terminals connected to the coiled section, and a package member covering the coil section and projecting the terminals therefrom. With this structure, the coil component operates in a high-frequency region, ensuring an inductance and infinitesimal direct-current resistance while being adaptable to a large current, and can be miniaturized.

Coil component and method of producing the same

A magnetic element for multi-phase is composed by burying a plurality of coils in a composite magnetic material such that a negative coupling of magnetic fluxes or a positive coupling of magnetic fluxes exists between at least two coils. This structure more miniaturizes inductors, or choke coils as the multi-phase magnetic element suitably used for application of a large current to many kinds of electronic equipment. Such multi-phase magnetic element has an excellent ripple current property.

Magnetic element for multi-phase and method of manufacturing the same

Method of manufacturing a magnetic element for multi-phase

A magnetic device of smaller size and lower profile comprising a coil conductor of high inductance and low resistance is provided. The magnetic device comprises a coil conductor and a multilayer magnetic layer formed so as to cover the periphery of the coil conductor. Further, a magnetic device having higher inductance value and lower conductor resistance value (AC resistance) by selecting a magnetic layer capable of suppressing the eddy current and having excellent magnetic characteristics even designed with smaller size and lower profile.

Magentic device

The invention is comprised of a coil group arranging a plurality of terminal-integrated type coils (), () formed by bending a metal sheet in a preset development form and having a predetermined positional relationship, and a magnetic material () burying therein the coil group. For example, axes of the plurality of coils (), () constituting the coil group, are arranged in parallel wherein the center point of at least one coil selected from the plurality of coils (), () and the center point of a coil other than the selected coil are in an staggered arrangement. Due to this, an array type choke coil can be realized which is thin overall and operable with a large current in a high frequency band.

Multiple choke coil and electronic equipment using the same

An inductance part is provided which includes: a coil which is formed by bending a metal plate into a coil shape; a magnetic body in which the coil is buried; and a short ring which faces the coil.

Inductance part and electronic apparatus therewith

The choke coil disclosed comprises: coils incorporated with terminals and intermediate taps manufactured of die cut metal plates; and a magnetic powder in which the coils are embedded.

Choke coil and electronic device using the same

A choke coil according to the invention is configured to include: a coil incorporated with terminals and/or intermediate tap, the coil configured of a metal plate being punched and folded; a magnetic material buried with the coil therein; and a radiator of a material with excellent thermal conductivity disposed on a surface of the magnetic material. A small-sized, low-profile choke coil structurally stable with excellent heat dissipation is to be provided.

Multi-phasemagnetic element and production method therefor

A coil component includes a coilhaving a through-hole, a magnetic core encapsulating the coil, and a terminal. The magnetic core includes a top portiondisposed at an upper part of the coil, a bottom portiondisposed at a lower part of the coil, and a middle portion. An outer layer thickness of the middle portion (W) is less than a diameter of the through-hole, while the top portion and the bottom portion are higher in density than the middle portion. The configuration of the present invention provides a small size coil component with less occurrence of magnetic saturation to prevent lowering of inductance even with thin topand bottom portions. The coil component further has improved reliability.

Coil component and method of manufacturing the same

The present invention provides a coil component includes: a coil section having a through hole and composed of a plurality of ring sections formed of a metallic flat plate disposed in a plane, connected to each other at ring connecting sections, having slits formed by cutting part of the ring sections, and bent at the ring connecting sections and placed one on top of another, terminals connected to the coil section, and a package member covering the coil section and projecting the terminals therefrom. With this structure, the coil component operates in a high-frequency region, ensuring an inductance and infinitesimal direct-current resistance while being adaptable to a large current, and can be miniaturized.

A choke coil for preventing harmonic distortions having a plurality of laminated iron core sheets formed into a core. A first coil is wound around a first limb of a first core, and a second coil is wound around a first limb of a second core. A third coil is wound around the second limb of both the first core and the second core, and the second core is disposed within the magnetic circuit of the first magnetic core. The iron core sheets have embossments formed on a front and back side for fitting the iron core sheets together. The embossments have longitudinal sides formed orthogonally to the direction of magnetic fluxes in the core, and may be inwardly inclined to face each other.

Growing community of inventors

Toyooka, Japan

Tsunetsugu Imanishi