An insulated wire having an insulating coat layer on the conductor outer peripheral surface having a rectangular cross-sectional shape and also having a long side, a short side, and a corner portion with a curvature radius Rc,

wherein a thickness t1 of the insulating coat layer covered on the surface, and which layer includes a long side, a thickness t2 of the insulating coat layer covered on the surface, and which layer includes a short side, and a corner portion thickness t3 of the insulating coat layer satisfy formula (1):

t3/{(t1+t2)/2}≧1.2   Formula (1)

wherein the t1 and t2 are each independently from 20 μm to 50 μm, and

wherein a ratio of the conductor cross-sectional area Sc to the insulated wire cross-sectional area Sw satisfies formula (2)

1.0>Sc/Sw≧0.8;   Formula (2)

as well as a coil and an electric or electronic equipment using the same.

An insulated wire having an insulating coat layer on the conductor outer peripheral surface having a rectangular cross-sectional shape and also having a long side, a short side, and a corner portion with a curvature radius Rc,

wherein a thickness t1 of the insulating coat layer covered on the surface, and which layer includes a long side, a thickness t2 of the insulating coat layer covered on the surface, and which layer includes a short side, and a corner portion thickness t3 of the insulating coat layer satisfy formula (1):

t3/{(t1+t2)/2}≧1.2   Formula (1)

wherein the t1 and t2 are each independently from 20 μm to 50 μm, and

wherein a ratio of the conductor cross-sectional area Sc to the insulated wire cross-sectional area Sw satisfies formula (2)

1.0>Sc/Sw≧0.8;   Formula (2)

as well as a coil and an electric or electronic equipment using the same.

The present invention provides an unsaturated polyester resin composition for producing a molding resin for use in a switched reluctance motor. The unsaturated polyester resin composition comprises an unsaturated polyester, a crosslinking agent, a curing agent, a low profile additive, a filler, and a reinforcing fibrous material. The content of the filler is from 100 parts by mass to 800 parts by mass with respect to 140 parts by mass of the total of the unsaturated polyester and the crosslinking agent. The filler comprises one or more fillers (filler A) selected from the group consisting of calcium carbonate, glass, silica, talc, clay, barium sulfate, calcium silicate, titanium oxide, and a hollow filler and one or more fillers (filler B) selected from the group consisting of aluminum hydroxide and alumina. The mass ratio of filler B to filler A is 1 or more. The unsaturated polyester resin composition of the present invention is optimal for producing a molding resin for use in a switched reluctance motor, the molding resin barely causing void formation upon sealing, effectively preventing vibration of stator salient poles, and barely generating cracks when vibration and heat are generated during motor operation.

A coil cooling structure comprises a coil which includes a strip-shaped conductor wound around a specific axis a plurality of times; an alumina layer which is formed on an end surface of the coil in the direction of the specific axis through thermal spraying of alumina and whose surface is flattened; a cooling plate which is mainly formed of alumina and has a flow passage for a cooling medium; and an adhesive which bonds the alumina layer and the cooling plate and which elastically deforms depending on a difference in thermal expansion between the alumina layer and the cooling plate.

A solenoid coil includes a coil winding that generates an electromagnetic force when a current is supplied to the coil winding. The solenoid coil also includes an electrically insulative bobbin made of an insulating material having a melting point. The bobbin includes a spool for supporting the coil winding. The spool includes a first end and a second end opposite the first end. The coil winding is positioned between the first end and the second end. The bobbin also includes a flange connected to one of the first end and the second end. A continuous ridge extends from the flange between an outer edge and studs to form a moisture barrier. The solenoid coil further includes an overmold enclosing at least a portion of the bobbin and the coil winding. The overmold bonds to the continuous ridge when the solenoid coil is heated to a temperature above the melting point.

A solenoid coil includes a coil winding that generates an electromagnetic force when a current is supplied to the coil winding. The solenoid coil also includes an electrically insulative bobbin made of an insulating material having a melting point. The bobbin includes a spool for supporting the coil winding. The spool includes a first end and a second end opposite the first end. The coil winding is positioned between the first end and the second end. The bobbin also includes a flange connected to one of the first end and the second end. A continuous ridge extends from the flange between an outer edge and studs to form a moisture barrier. The solenoid coil further includes an overmold enclosing at least a portion of the bobbin and the coil winding. The overmold bonds to the continuous ridge when the solenoid coil is heated to a temperature above the melting point.

A magnetic circuit component includes a magnetic core and a coil formed by winding a conductor around the magnetic core. The magnetic circuit component includes a magnetic material section that is formed from a soft magnetic material, and that covers a part of a surface of the coil or the entire surface of the coil and is disposed away from the magnetic core.

A magnetic circuit component includes a magnetic core and a coil formed by winding a conductor around the magnetic core. The magnetic circuit component includes a magnetic material section that is formed from a soft magnetic material, and that covers a part of a surface of the coil or the entire surface of the coil and is disposed away from the magnetic core.

A coil sheet includes a conductor layer, a thermally resistant organic insulating layer, a thermosetting adhesive layer in a B-stage state, and a base layer, such that the conductor layer and the insulating layer are bonded to the base layer with the adhesive layer. A coil is formed of a laminate sheet including a conductor layer, an insulating layer, and an adhesive layer of the coil sheet which are released from the base layer thereof, wherein the laminate sheet is wound around a specific axis a plurality of times, and the adhesive layer is thermally cured.

A method produces a coil sheet from an initial coil sheet in which a conductor layer, a thermally resistant insulating layer, a thermosetting, uncured adhesive layer, and a base layer are stacked in this order. The method includes a first cutting step of cutting the conductor layer into a predetermined shape through etching, and a second cutting step of cutting, after the first cutting step, the insulating layer and the adhesive layer into the predetermined shape through etching.