Insulated wire

A technology of insulated wires and insulating layers, applied in the direction of insulated cables, insulators, insulated conductors, etc., can solve the problems of low insulation breakdown strength, and achieve excellent interlayer adhesion, excellent partial discharge resistance, and insulation breakdown resistance sex high effect

Active Publication Date: 2012-11-14
ESSEX FURUKAWA MAGNET WIRE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the laminated structure of the two layers of the above-mentioned first insulating layer and the above-mentioned second insulating layer, there is no mention of the permittivity of each layer, and there is a problem that the dielectric breakdown strength is low.

Method used

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Examples

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Embodiment

[0069] The present invention will be described in more detail below based on examples, but the present invention is not limited thereto.

[0070] The present inventors produced insulated electric wires having the configurations described in Tables 1 to 4, and evaluated their performance. On a copper conductor with a diameter of 1 mm, the insulating layers with low permittivity and the insulating layers with high permittivity described in Tables 1 to 4 are alternately laminated according to the number of repetitions described in Tables 1 to 4, and the thickness described in Tables 1 to 4 is used. An insulating layer was formed, and the insulated electric wires of Examples 1-13 and Comparative Examples 1-4 were obtained. Here, in Examples 1 to 10, Example 13, and Comparative Example 3, the HI-406 series (manufactured by Hitachi Chemical Industries, Ltd., trade name) formed around the conductor was used as the adhesive properties described in Tables 1 to 4. Insulated wire with p...

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Abstract

[Problems] To provide an insulated wire, which is high in a dielectric breakdown resistance even if insulating resin coatings are laminated, because the interlayer adhesiveness is excellent, and which is excellent in a partial discharge resistance, because the dielectric constant is low. [Means to solve] An insulated wire, having directly or indirectly on a conductor (1), at least two laminate units each formed by laminating an insulating layer (21, 23) and an insulating layer (22, 24) higher in a dielectric constant than the insulating layer (21, 23), in this order from the conductor side.

Description

technical field [0001] This invention relates to insulated wires. Background technique [0002] Inverters are being installed in many electrical equipment as effective variable speed control devices. However, switching is performed at several kHz to several tens of kHz, and a surge voltage is generated in response to these pulses. Such a converter surge is a phenomenon in which reflection occurs at a discontinuous point of resistance in a propagation system, such as the beginning or end of a connected wiring, and as a result, a voltage up to twice the converter output voltage is applied. In particular, the output pulses generated by high-speed switching elements such as IGBTs have a high voltage steepness, so even if the connecting cable is shortened, the surge voltage is high, and the voltage attenuation due to the connecting cable is also small. As a result, the converter output voltage nearly 2 times the voltage. [0003] In inverter-related equipment, such as high-spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B7/00
CPCH01B7/0208H01B3/427H01B3/306H02K3/40H01B7/00H01B7/02
Inventor 大矢真武藤大介
Owner ESSEX FURUKAWA MAGNET WIRE LLC
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