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High thermal conductivity insulation structure of stator bar of excess epoxy mould pressing insulation system

A technology of insulator and stator, applied in the shape/style/structure of winding insulation, winding insulation materials, etc., can solve the problems of poor electrical performance of insulating materials, low thermal conductivity, unfavorable heat dissipation of wire rods, and inability to apply, etc., to achieve improvement Effects of heat transfer speed, improved thermal conductivity, and wide application prospects

Inactive Publication Date: 2011-05-11
HARBIN ELECTRIC MASCH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The insulating materials used in high-voltage motors are mainly composed of resin adhesives, powdered mica paper, and glass fiber cloth reinforcement materials. The thermal conductivity of insulating materials is between 0.20-0.25W / mK. Low thermal conductivity is not conducive to heat dissipation of wire rods. Not conducive to the development of large-capacity air-cooled or hydrogen-cooled motors
The high thermal conductivity insulating material developed in the past, because the added high thermal conductivity filler reduces the content of powder mica, resulting in poor electrical properties of the insulating material and cannot be applied

Method used

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  • High thermal conductivity insulation structure of stator bar of excess epoxy mould pressing insulation system
  • High thermal conductivity insulation structure of stator bar of excess epoxy mould pressing insulation system
  • High thermal conductivity insulation structure of stator bar of excess epoxy mould pressing insulation system

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Embodiment Construction

[0013] A multi-glue molded insulation system stator bar with high thermal conductivity insulation structure, the pit 1 of the transposition insulation layer is the insulating material filled between the transposition insulation layer 2 and the narrow surface insulation pad strip 6 of the wire, and the transposition insulation layer 2 is The insulation at the straight line transposition bend of the wire bar prevents the insulation of the electromagnetic wire from being damaged and short-circuited here. The surface insulation layer 4 of the electromagnetic wire and the insulation 5 between the wire rows are located between two rows of wires or multiple rows of wires 9 to avoid electromagnetic wires between rows. Short circuit, wire narrow surface insulating pad strip 6 on the narrow surface of the wire rod, the wire rod main insulation layer 7 is a multi-layer insulation layer surrounding the wire rod, and the anti-corona layer 8 is on the outer layer of the main insulation layer ...

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Abstract

The invention relates to a high thermal conductivity insulation structure of a stator bar of an excess epoxy mould pressing insulation system. The stator bar is suitable for the excess epoxy mould pressing insulation system. High thermal conductivity ceramic fiber is contained in the insulation layer on the outer surface of an electromagnetic wire; and reinforcement material in position-changing pit insulation, bar insulation, a restricted area filler strip, major insulation and anti-corona material contains the high thermal conductivity ceramic fiber. The stator bar manufactured by the invention has major technical performance figures that firstly, the temperature conductivity reaches 0.5 W / mK; secondly, tg delta is smaller than 1% under normal 0.2 UN (nominal voltage); thirdly, the stator bar has no visible corona trace for 60 seconds under 1.5 UN; fourthly, the flashover voltage of the finished bar reaches 5.5 UN; and fifthly, the service life of the bar is longer than 10 h under the 3.0 UN and is longer than 1100 h under the 2.0 UN during the electric resistance aging test.

Description

[0001] Technical field: The present invention relates to a high thermal conductivity insulation structure of a stator bar of a multi-glue molded insulation system. Background technique: [0002] The insulating materials used in high-voltage motors are mainly composed of resin adhesives, powdered mica paper, and glass fiber cloth reinforcement materials. The thermal conductivity of insulating materials is between 0.20-0.25W / mK. Low thermal conductivity is not conducive to heat dissipation of wire rods. It is not conducive to the development of large-capacity air-cooled or hydrogen-cooled motors. The high thermal conductivity insulating materials developed in the past, because the added high thermal conductivity fillers reduce the content of powder mica, resulting in poor electrical properties of the insulating materials, which cannot be applied. In order to improve the thermal conductivity of domestic high-voltage insulation materials and ensure that the powder mica content in ...

Claims

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Application Information

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IPC IPC(8): H02K3/34H02K3/30
Inventor 付强满宇光张秋寒赫兟
Owner HARBIN ELECTRIC MASCH CO LTD
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