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High-thermal conductivity insulation structure of stator bar of insulation system

A stator bar and insulating structure technology, which is applied to 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 bars, and inability to apply, etc. Achieve the effect of improving thermal conductivity and wide application prospects

Inactive Publication Date: 2012-05-09
HARBIN ELECTRIC MASCH CO LTD +1
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  • Description
  • Claims
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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 insulation system
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  • High-thermal conductivity insulation structure of stator bar of insulation system

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Embodiment Construction

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

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Abstract

The invention relates to a high-thermal conductivity insulation structure of a stator bar of an insulation system. An insulating layer on the outer surface of an electromagnetic wire contains high-thermal conductivity ceramic fibers; reinforcing materials in transposition pit insulation, inter-row insulation, narrow surface filler strip, main insulation and anti-corona materials contain high-thermal conductivity ceramic fibers; and resin adhesives in transposition pit insulation, transposition insulating layer, inter-row insulation, main insulation and anti-corona materials contain high-thermal conductivity ceramic fibers. The stator bar made by adopting the high-thermal conductivity insulation structure has the following main technical performance indexes that: (1) the bar thermal conductivity reaches 0.5W / mK; (2) in the normal state and at a voltage of 0.2UN, tg delta is less than 1 percent; (3) the stator bar has no visual corona mark in 60 seconds at a voltage of 1.5UN; (4) a breakdown voltage of the finished product bar reaches 5.5UN; and (5) an electrical aging resistance test of the bar proves that the service life of the stator bar at a voltage of 3.0UN is longer than 10 hours and the service life of the stator bar at the voltage of 2.0UN is longer than 1,100 hours. The stator bar is suitable for a VPI (vacuum pressure impregnation) insulation system.

Description

[0001] Technical field: The present invention designs a high thermal conductivity insulation structure of the stator bar of the 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 the insulation ma...

Claims

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Application Information

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IPC IPC(8): H02K3/32H02K3/30H02K3/40
Inventor 付强卢春莲满宇光李振海赫兟隋银德
Owner HARBIN ELECTRIC MASCH CO LTD
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