Sht Corporation Limited

Other

Honeywell International Inc.

Hitoshi Yoshimori

Tsunetsugu Imanishi

Takashi Yoshimori

Masafumi Inoue

Yasuomi Takahashi

Ryusuke Hasegawa

Ai Nagano

Koji Nakashima

The present invention provides a core member, a gapped core, and a current sensor in which the gap width of a core main body that is entirely or partially covered by a resin mold portion can be set as appropriate, and insulation between the core main body and a bus bar opening can be achieved. A core memberaccording to the present invention is a core member that includes a gap forming region C in which a gapis formed. The core member includes an annular the core main bodyhaving a bus bar openingin which a bus baris disposed, a resin mold portionthat entirely or partially covers the core main body, the resin mold portion covering at least a portion of the gap forming region, and a resin bridge portionwhose both ends are continuously connected to the resin mold portion, and that is formed between an inner circumference side of the core main body and the bus bar opening, the resin bridge portion including a voidthat is formed at a position opposing the gap forming region, and extends through the core member in a thickness direction of the core member between the resin bridge portion and the core main body or the resin mold portion.

Core member, gapped core, current sensor, and method for manufacturing gapped core

In an electric current detector according to the present invention, an annular corehaving a magnetic gap G and a Hall elementwhich is located in the magnetic gap of the coreand detects a magnitude of an electric current passing through the coreare arranged in an outer case. Here, in the core, a mold resin portionwhich covers a surface of the coreover part of an overall length along a magnetic path thereof is molded at one or a plurality of portions along the magnetic path to configure an integral core component, the core component being fixed into the outer casein a state where a surface of the mold resin portionmakes contact with an inner surface of the outer case

Electric current detector and core component used therefor

A method is described for cutting a plurality of molded cores. Each core includes an annular magnetic body made of a magnetic material and a covering part made of an insulating resin that covers the magnetic body. The method includes coupling each of the molded cores side by side in an axial direction, and cutting the molded cores at a first cutting part and at a second cutting part that transect an outer peripheral surface and an inner peripheral surface and approach each other toward an inner periphery direction of the molded core. The main body has 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. A segment has 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.

Method for cutting molded core used for coil component

The present invention is to provide a plurality of unit coil portions formed by winding one conductive wire about a winding axis is placed side by side in the winding axis direction, each of the unit coil portions is formed by unit wound portions having different inner circumferential lengths from each other, the unit coil portion is multi-layered in at least a part thereof by pushing at least a part of the unit wound portion having a small inner circumferential length inside the unit wound portion having a large inner circumferential length, and the unit wound portion is wound along a loop shape winding route having a plurality of arc shape corner parts. In unit wound portions forming the unit coil portion, corner parts formed at the same phase angle with respect to the winding axis are formed in an arc shape having curvature center at the same position.

Coil winding method and winding apparatus

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 () according to the present invention has a main body () and a segment () that are obtained by a molded core () 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 () 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 () 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 () 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 ().

Gapped core, coil component using same, and method for manufacturing coil component

In order to provide an air core coil fitting apparatus that can automatically fit an air core coil onto a core, an air core coil fitting apparatus includes a holding member, a coil fitting rod, a rod driving member, a pushing member, and a sending member. The holding member holds a core main body that is formed in a ring shape, has a gap extending through the core main body from an inner circumferential face to an outer circumferential face thereof, and allows an air core coil wound in advance to be fitted onto the core main body from one end thereof. On the coil fitting rod, the air core coil that is to be fitted onto the core main body held by the holding member is fitted. The rod driving member brings a front end of the coil fitting rod close to or into contact with the one end of the core main body held by the holding member. The pushing member pushes the air core coil fitted on the coil fitting rod, toward the one end of the core main body. The sending member is disposed at a circumferential edge of the core main body held by the holding member, and pulls the air core coil pushed by the pushing member and fitted onto the core main body, toward another end of the core main body.

Air core coil fitting apparatus

The present invention provides a teardrop-shaped magnetic core having excellent manufacturing efficiency, a large initial inductance, and stable DC superposition characteristics and a coil device using this teardrop-shaped magnetic core. A teardrop-shaped magnetic core according to the present invention is a magnetic core that is made from a magnetic material and is to be used in a coil device, the magnetic core including a first rectilinear portionand a second rectilinear portionthat have a straight-line shape and are connected to each other at one end via a bent portionthat is bent at a right angle, and a circular arc portionthat has a circular arc shape and connects the first rectilinear portion and the second rectilinear portion to each other at the other end. A coil device according to the present invention is configured by winding a wire around the teardrop-shaped magnetic core

Teardrop-shaped magnetic core and coil device using same

In a manufacturing method of a coil, a plurality of unit coil portions is placed side by side in a winding axis direction, each of the unit coil portions is formed of a plurality of unit wound portions having mutually different inner circumferential lengths, and the unit wound portion having a small inner circumferential length enters inside the unit wound portion having a large inner circumferential length. In coil winding method, a step of forming an outward wound unit coil portion formed of a plurality of unit wound portions laminated from an inner circumferential side to an outer circumferential side and forming an inward wound unit coil portion formed of a plurality of unit wound portions laminated from the outer circumferential side toward the inner circumferential side are alternately repeated. In outward wound unit coil portion, a step of forming the unit wound portion on the outer circumferential side by laminating on an outer circumferential surface of the unit wound portion on the inner circumferential side is repeated. In inward wound unit coil portion, a step of forming the unit wound portion at position spaced apart from the outward wound unit coil portion and pushing in the unit wound portion until it makes contact with a side surface of the outward wound unit coil portion is repeated.

Coil winding method and transformer

An automatic winding machine has a rotation drive mechanism, four winding core shafts protruding from the drive mechanism and being rotated integrally with a rotation center of the drive mechanism, the winding core shafts whose axial centers are parallel to the rotation center, a reciprocating mechanism for reciprocating the winding core shafts, at least one pressing roller biased in the direction of bringing close to a rotation passage of the winding core shafts from the outer circumferential side, and a conductive wire supply mechanism for continuously supplying a conductive wire between the winding core shafts and the pressing roller.

Automatic winding machine, air core coil, and winding method of the same

A method for manufacturing a coil device comprises a first step of twisting a tip end part of the conductive wire by approximately 90 degrees with respect to a conductive wire portion arranged rearward continuously from the tip end part to form a twist part, and winding the tip end part of the conductive wire around the outer peripheral surface of the core in a lying posture on the outer peripheral surface; a second step of winding the conductive wire arranged rearward continuously from the twist part around the outer periphery surface of the core in a standing posture on the outer peripheral surface; and a third step of transforming the conductive wire on a tip end side with respect to the twist part in a direction apart from the outer periphery surface of the core to form one lead part extending substantially linearly.

Method for manufacturing a coil device

The present invention provides an air-core coilwherein one conductor is wound into a spiral form to thereby form consecutively, axially of the coil, a plurality of unit turn portions () which are different from each other in inner peripheral length and to form, axially of the coil, unit coil portions comprising the plurality of unit turn portions () to produce a partly finished coil, and thereafter the partly finished coilis compressed to force the unit turn portion of small inner peripheral length inwardly of the unit turn portion of great inner peripheral length from among the unit turn portions providing each of the unit coil portions to thereby make each of the unit coil portions multi-layered. Thus the air-core coilexhibits a smaller voltage across layers than conventionally and excellent frequency characteristics.

Air-core coil and process for fabricating the same

The invention provides a process for fabricating a coil device which process comprises the steps of making an air-core coiland fitting the air-core coilaround a core. The first step makes an air-core coilcomprising a plurality of unit coil portionsarranged axially of the coil and each having one or a plurality of turns of conductor, each pair of unit coil portions adjacent to each other axially of the coil being different from each other in inner peripheral length. The fitting step fits the air-core coilaround the corewhile at least partly forcing the unit coil portionsof small inner peripheral length inwardly of the unit coil portionsof great inner peripheral length by compressing the coilaxially thereof. The process realizes a high space factor without using a rectangular or trapezoidal conductor, and can be automated.

Method for manufacturing coil device

Disclosed are a gapped magnetic core which may be coated or uncoated with an insulating layer or housed in an insulting box having a physical gap whose dimension is close to that of the gapped magnetic core and automated or semi-automated methods of applying copper wire on the gapped core or the core assembly and filling the gap with a spacer in the core or core assembly. The disclosed processes allow various combinations of core and spacer materials and gap configurations, resulting in a wide variety of core-coil assemblies which are useful as inductive components in electric and electronic circuits. Also disclosed is a core-coil assembly wherein a magnetic core with a gap directed off the conventional radial direction of a toroidally-wound core.

Growing community of inventors

Izumisano, Japan

Hitoshi Yoshimori