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Tool and method to measure contamination in slot of conductor bar

A technology of conductor strips and grooves, used in measuring devices, voltage only, motor generator testing, etc., can solve problems such as excessive cleaning, waste, damage to materials, etc.

Inactive Publication Date: 2017-08-18
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art methods have disadvantages, the risk of excessive cleaning (which means a waste of working time), and the risk of damaging the material

Method used

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  • Tool and method to measure contamination in slot of conductor bar
  • Tool and method to measure contamination in slot of conductor bar
  • Tool and method to measure contamination in slot of conductor bar

Examples

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Embodiment Construction

[0034] Referring to the drawings, which illustrate examples of the present invention, wherein like reference numerals designate like or corresponding parts throughout the several views.

[0035] figure 1 A schematic perspective cut-away view of part of the core 8 is shown. The core 8 may be a stator core or a rotor core of an electric machine, in particular a turbo generator. The cutaway of the core 8 shows the two walls of the core 8 which enclose the channel 7 milled in the center in the core 8 . The complete core 8 has a cylindrical shape, while figure 1 Only a small portion without curvature is shown. The channels 7 have a rectangular shape and generally project along the entire length of the core 8 in a direction perpendicular to the image plane. A number of channels 7 are milled in the core 8 depending on the particular electric machine. exist figure 1 , the conductor strips are removed, which are regularly placed in the channels 7 during operation. Here, maintena...

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PUM

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Abstract

This invention relates to determining the functional capability of an electric machine by checking the degree of contamination in a slot for housing a conductor bar. It is an object of the invention to appropriately determine the pollution of a slot of an electric machine. Disclosed is a tool to measure a contamination in a slot for a conductor bar of an electric machine, with a voltage generator to apply a voltage at the slot and a voltmeter to measure a voltage drop along the slot, and a processor to calculate the contamination from the voltage drop. Further disclosed is a method to measure a contamination in a slot for a conductor bar of an electric machine with the steps of applying a voltage at the slot, measuring a voltage drop along the slot, and calculating the contamination in the slot on basis of the measured voltage drop.

Description

technical field [0001] The present disclosure relates to the technical field of electric machine maintenance. In particular, the present disclosure relates to determining the functional capability of an electric machine by examining the level of contamination in channels used to accommodate conductor bars. [0002] Electric machines are in particular rotating electric machines, such as synchronous generators (turbine generators) to be connected to gas or steam turbines and synchronous generators (hydro engines) to be connected to water turbines, or asynchronous generators either synchronous or asynchronous Electric motors or also other types of electric machines. Background technique [0003] Large electric machines for high power generation have many years of operation. These electric machines are usually maintained and repaired as these means are more economical than replacement of the entire machine. One of the components maintained is the slots in the rotor and stator...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01N27/00
CPCG01N27/00G01R31/34G01N27/04G01R19/0084
Inventor S.C.A.贝尔蒙L.D.克莱芒斯
Owner GENERAL ELECTRIC TECH GMBH