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Single coil VPI process

A coil and process technology, which is applied in the field of vacuum pressure impregnation process, can solve the problems that large-scale hydroelectric generators are difficult to implement VPI process, and achieve excellent storage stability, high mica content, and good electrical performance.

Inactive Publication Date: 2014-06-04
CHONGQING ELECTRIC MACHINE FEDERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention intends to provide a single-coil VPI process to solve the problem that it is difficult to implement the VPI process in large hydroelectric generators in the prior art

Method used

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  • Single coil VPI process

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Experimental program
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Effect test

Embodiment Construction

[0028] The VPI process flow for manufacturing a single coil coil includes the following steps:

[0029] Winding→wrapping protective tape→sand head→expansion→shaping→turn-to-turn gelation→removing protective tape→wrapping lead wire→wrapping less glue mica tape→wrapping anti-halation tape→wrapping polyester heat shrinkable tape at the end→inspecting→ Flat-wrapped PTFE film→Single coil VPI dipping treatment→Assemble the coil on a special baking curing mold→Baking→Take out the coil→Clean the general forming curing mold→Coil coating with high and low resistance paint→Inspection.

[0030] The process flow of stator "no hanging handle" inlaid wire is as follows:

[0031] Stator core trimming and cleaning treatment (slots must not have sharp corners) → Spray low-resistance paint on stator core slots → Install positioning end hoops → Insert the lower side of the first coil into the position of the core slot, and place the upper side on the shelf Upper→Insert the coils one by one, so t...

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Abstract

The invention discloses a single coil VPI process so as to solve the problem that a large water power generator carries out the VPI process difficultly in the prior art. The single coil VPI process sequentially comprises the following steps that VPI and baking are carried out on a single coil, and the coil is embedded. According to the scheme, the single coil VPI process has the advantages that the whole machine coil embedding is carried out after the single coil is manufactured in a VPI mode, the size of an iron core is large, operation is not easy, the insulation thickness can be decreased, the product cost is lowered, and the insulation quality of a motor is promoted to be a high level, the service life of the motor is prolonged, and the difficult problem of manufacturing of a stator coil in a medium-type water power generator is solved.

Description

technical field [0001] The invention relates to a vacuum pressure impregnation process for motor coils. Background technique [0002] In the high voltage motor insulation system, VPI insulation is one of the advanced technologies. VPI is the abbreviation of vacuum pressure impregnation process. VPI vacuum pressure impregnation equipment is an important process equipment in the production process of electrical appliances and electrical materials such as high-voltage motors, transformers, power capacitors and paper-insulated high-voltage power cables. After being treated by VPI process, it has good insulation performance, reduced temperature rise, and improved efficiency. Increase mechanical strength, solve loosening phenomenon during operation, prevent insulation failures such as short circuit, improve moisture-proof ability, and prolong service life. [0003] The VPI process reduces the coil insulation gap and improves the dielectric strength of the winding. In the manufa...

Claims

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Application Information

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IPC IPC(8): H02K15/00H02K15/12
Inventor 苏建新周健张济文王新华汪同斌
Owner CHONGQING ELECTRIC MACHINE FEDERATION
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