Insulated wire and method for manufacturing same, and rotating electrical machine and method for manufacturing same
一种绝缘电线、制造方法的技术，应用在旋转电机及其制造领域，能够解决耐久性受损等问题，达到耐久性优异、简便且廉价制造工序的效果
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Embodiment 1
[0158] (Production of insulated wire without air bubbles)
[0159] Insulated wires were made as follows.
[0160] A conductor (copper with an oxygen content of 15 ppm) having a circular cross section (φ0.5 mm) was used, and an extrusion coating resin layer was formed on the conductor.
[0161] The screw of the extruder uses a 30mm full-range screw, L / D=20, and a compression ratio of 3. Polyethylene terephthalate (PET) (manufactured by Teijin Corporation, trade name: PET resin TR-8550T, relative dielectric constant 3.2) was used as thermoplastic resin so that the shape of the cross-section of the extruded coating resin layer and the conductor PET was extrusion-coated using an extrusion die in a similar shape to form an extrusion-coated resin layer with a thickness of 32 μm on the outside of the conductor to obtain an insulated wire composed of a PET extrusion-coated wire.
[0162] (Production of foamed insulated wire)
[0163] For the insulated wire made as above, such as ...
Embodiment 2
[0190] (Production of insulated wire without air bubbles)
[0191] Insulated wires were made as follows.
[0192] A conductor (copper with an oxygen content of 15 ppm) having a circular cross section (φ1.0 mm) was used, and an extrusion coating resin layer was formed on the conductor.
[0193] The screw of the extruder uses a 30mm full-range screw, L / D=20, and a compression ratio of 3. As the thermoplastic resin, polyethylene naphthalate (PEN) (manufactured by Teijin Corporation, trade name: Teonex TN8065S, relative dielectric constant 3.0) is used so that the cross-sectional shape of the extruded coating resin layer is similar to the shape of the conductor. In the shape method, the extrusion coating of PEN is performed using an extrusion die, and an extrusion coating resin layer with a thickness of 100 μm is formed on the outside of the conductor to obtain an insulated wire composed of a PEN extrusion coating wire.
[0194] (Production of foamed insulated wire)
[0195] Fo...
Embodiment 3
[0217] (Production of insulated wire without air bubbles)
[0218] Insulated wires were made as follows.
[0219] A rectangular conductor (copper with an oxygen content of 15 ppm) with a rectangular cross section (long side 3.2 mm×short side 2.4 mm, radius of curvature r=0.3 mm at the four corners) was used to form an enameled baked layer on the conductor.
[0220] Regarding the formation of the enamel baking layer, using a mold similar to the conductor, a polyamide-imide resin (PAI) varnish (manufactured by Hitachi Chemical Co., Ltd., trade name: HI406) was applied to the conductor, and the baking time was The speed of 15 seconds passed through an 8-meter-long baking furnace set at 450° C., and this operation was repeated several times to form a 40 μm-thick enameled baked layer to obtain an enameled wire.
[0221] Using the obtained enameled wire as a core wire, an extrusion-coated resin layer was formed as follows.
[0222] The screw of the extruder uses a 30mm full-range ...
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Abstract
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