Manufacturing process for manufacturing motor stator coil through vacuum-pressure paint dipping

A technology of vacuum pressure dipping paint and motor stator, which is used in the manufacture of motor generators, electrical components, electromechanical devices, etc. The effect of tightness, high dielectric breakdown field strength, and low dielectric loss increment

Active Publication Date: 2013-12-25
HANGZHOU FUYANG HYDROPOWER EQUIP INSPECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mica layer generally has 9 to 13 layers. During the hot molding process, due to the obstruction of mica paper and epoxy glue, it is difficult for the air in these air gaps to escape, and air pockets are formed in the insulating layer. The main medium is air with a certain humidity, and its dielectric strength is far lower than that of the epoxy mica layer. Therefore, the existence of these air pockets greatly reduces the breakdown field strength of the insulating layer and affects the insulation performance of the motor stator coil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0010] Embodiment: The manufacturing process of the motor stator coil manufactured by vacuum pressure varnish in this embodiment includes the following steps: after the main insulating layer of the motor bearing coil is wrapped with less rubber mica tape, the motor stator coil is first subjected to vacuum pressure varnish immersion The process is to put the stator coil of the motor into the vacuum tank, then use the vacuum pump to pump out the air in the vacuum tank to make the vacuum tank in a vacuum state, then inject the insulating varnish and pressurize the insulating varnish through the pressure pump at the same time, and the pressure pump passes through the pressure tube Connect with the vacuum tank, fill the air gap between the mica with insulating varnish, then carry out hot molding curing at 200°C, and then embed it in the stator slot of the motor, and then carry out the second hot molding curing at 155°C The second hot molding curing time is not less than 10 hours.

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PUM

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Abstract

The invention relates to a manufacturing process for manufacturing a motor stator coil through vacuum-pressure paint dipping. The process includes the following steps: after an main insulating layer of a motor bearing-type coil is bandaged with a little-glue mica tape, carrying out a vacuum-pressure paint dipping process on the motor stator coil; after inter-mica air gaps are filled fully with insulating paint in advance, carrying out heat moulding curing at a temperature of 180 DEG C to 200 DEG C and then inserting the coil into a motor stator groove; and after connection, carrying out second heat moulding curing at a temperature of 155 DEG C for no shorter than 10 hours. The high-voltage motor stator coil manufactured through the vacuum-pressure paint dipping is structurally compact in insulating layer, zero in air pocket, low in dielectric loss increment, and low in partial discharge capacity and high in dielectric breakdown field intensity. Insulating performance, mechanical performance, heat resistance performance and electrical aging resistance performance of the coil are all improved significantly so that a coil quality is improved to a higher level.

Description

[0001] Technical field [0002] The present invention involves a manufacturing process for making motor stator coils through vacuum pressure immersion paint. Background technique [0003] The manufacturing process of traditional motor stator coils is that the main insulation layer uses epoxy Yunyu mother belt, also known as Shao Jiao Yunmu with bandaging, that is, enter the thermal mold pressure process.The cloud mother layer generally has 9 to 13 floors. During the heat mold pressure, due to the obstacles of the cloud mother paper and epoxy glue, the air in these air gaps is difficult to run out.The main medium is air with a certain humidity, and its dielectric strength is much lower than that of the epoxy cloud mother layer. Therefore, the existence of these air points greatly reduces the inflammation of the insulating layer and affects the insulation performance of the motor stator coil. Invention content [0004] The present invention mainly solves the existence of air acupo...

Claims

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Application Information

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IPC IPC(8): H02K15/10H02K15/12
Inventor 吴向荣
Owner HANGZHOU FUYANG HYDROPOWER EQUIP INSPECTION
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