A preparation method for a metal matrix composite wire includes the following steps: 1) preparing a metal inner core; 2) preparing a glass-resin mixture; 3) dissolving self-adhesive resin in the solvent to prepare a self-adhesive resin solution; 4) uniformly coating the glass-resin mixture on a surface of the metal inner core, then coating the self-adhesive resin solution on a surface of the glass-resin mixture, and performing drying at a temperature of 80 C. to 150 C.; and 5) repeating the step 4) until a thickness of the coating reaches 2 to 10 m. When an inductor is prepared by using the composite wire, the inductor may have relatively good weather resistance, a relatively good dielectric voltage-withstand capability, as well as relatively good high-temperature resistance and electrical performance.

An enameled wire has a conductor core having an outer surface and an electrically insulating laminate completely covering the outer surface. This laminate is formed by an inner base layer directly on the outer surface, at least two separate neutral outer layers surrounding the inner base layer and of a neutral polymer containing no filler affecting discharge resistance, and a functional outer layer surrounding the inner base layer and of a functional polymer including a functional filler increasing discharge resistance of the laminate.

Provided is an ATF (Automatic Transmission Fluid) oil and corona-resistant enameled wire for electric vehicle motors, belonging to the insulating materials field. The ATF oil and corona-resistant enameled wire for electric vehicle motors comprises a copper conductor and an insulating layer, wherein said insulating layer from inside to outside is composed of ATF oil and corona-resistant protective film, corona-resistant PAI film, ATF oil and corona-resistant protective film, corona-resistant PAI film, ATF oil and corona-resistant protective film. The ATF oil and corona resistant enameled wire of this disclosure is suitable for the preparation of oil-cooled electric vehicle motor loose winding coil due to the advantages of good manufacturability, excellent ATF oil and corona resistance, and low manufacturing cost.

There is provided a method for manufacturing an insulated wire, including at least: coating an outer periphery of a running wire with an insulation coating material discharged from a coating material discharging tank; baking the insulation coating material by an incinerator, the insulation coating material being used for coating the outer periphery of the running wire; and cooling the running wire by a cooling mechanism so that a temperature of the running wire before being coated with the insulation coating material, is a specific temperature, based on a temperature of the running wire detected by a temperature detector, wherein the coating, the baking, and the cooling are repeated.

An insulated wire, having at least one layer as an insulation layer, on an outer periphery of a conductor, wherein at least one layer as the insulation layer is composed of a mixed resin of a crystalline resin (A) and a resin (B) having a glass transition temperature higher, by 30 C. or more, than a glass transition temperature of the crystalline resin (A), in which the glass transition temperature is measured by a thermomechanical analysis, and a mixing mass ratio of the mixed resin (a mass of the crystalline resin (A):a mass of the resin (B)) is 90;10 to 51;49; a coil; an electric or electronic equipment; and a method of producing the insulated wire.

A method for manufacturing an insulated conductive material includes providing a continuous feed of a conductive material, a first continuous feed of insulating material above a top surface of the conductive strip, and a second continuous feed of insulating material below a bottom surface of the conductive strip. Portions of the first and second continuous feeds of insulating material are compressed against a portion of the conductive material. The portions of the first and second insulating material are cured to thereby provide a continuous feed of insulated conductive material.

A method for forming magnet wire includes co-extruding multiple layers of different insulating materials. A conductor may be provided, and extruded insulation may be formed around the conductor by co-extruding both a first layer of thermoplastic insulation and a second layer of thermoplastic insulation with the second layer formed around the first layer. The first layer may include a first polymeric material having a first thermal index, and the second layer may include a second polymeric material having a second thermal index higher than the first thermal index.

An insulated wire having a conductor coated with at least one layer of an insulating material, and having at least one layer of a bubble layer in a thickness direction in a coating layer, wherein the insulated wire has a part in which a thickness is small in a length direction or a circumferential direction in an identical coating layer; a method of producing the same; a method of producing a stator for a rotating electrical machine; and the rotating electrical machine.

An insulated wire including a laminated resin-coated insulated wire containing: a thermosetting resin layer (A) directly or via an insulating layer (D) on a conductor having a rectangular cross-section; and at least a thermoplastic resin layer (B) on the outer periphery of the thermosetting resin layer (A), in which the cross-sectional shape of the thermosetting resin layer (A) composed of two pairs of two sides facing each other, and has at least four convex portions each of which has a film thickness in maximum, at least one convex portion of the at least four convex portions is on each of the four sides, or at least two convex portions of the at least four convex portions are at least on each of the two sides facing each other, and in the each side having the convex portion, provided that a minimum film thickness is designated as a pm, and an average of maximum film thicknesses of the convex portions is designated as b pm, the a/b ratio is 0.60 or more and 0.90 or less; a coil, and electric/electronic equipment.

Disclosed herein are exemplary embodiments of electrically insulated conductors and exemplary methods for electrically insulating conductors, such that the resulting electrically insulated conductors are resistant to partial discharge (PD), and thereby suitable for PD resistant design schemes (e.g., 800 V or above electric motors, etc.). An exemplary method includes applying an enamel coating along an electrical conductor, wrapping an electrically insulative tape around the enameled electrical conductor, and heating sealing the tape-wrapped, enameled electrical conductor to help ensure good adhesion of the electrically insulative tape to the enamel coating. The electrically insulative tape comprises polyimide and a sufficient amount of an electrically insulative, corona resistant filler for PD resistance. The tape-wrapped, enameled electrical conductor is resistant to partial discharge (PD), e.g., suitable for use in a stator winding of an 800 volt or above electric motor, etc.