Large-scale motor stator bar anti-corona structure capable of improving voltage resistance level of windings

An anti-corona structure and stator bar technology, applied in the shape/style/structure of winding insulation, can solve the problems of limited function of winding bars, reduce the winding gap electric field, ensure consistency, and improve winding withstand voltage horizontal effect

Inactive Publication Date: 2015-09-02
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method only optimizes the electric field at the end by adjusting the properties of the multi-section anti-corona material and the length of the anti-corona structure, which has a limited effect on improving the electric field between the winding bars

Method used

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  • Large-scale motor stator bar anti-corona structure capable of improving voltage resistance level of windings
  • Large-scale motor stator bar anti-corona structure capable of improving voltage resistance level of windings
  • Large-scale motor stator bar anti-corona structure capable of improving voltage resistance level of windings

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Embodiment Construction

[0019] An anti-corona structure for a stator bar of a large motor that improves the withstand voltage level of a winding is characterized in that it specifically includes:

[0020] (1) if figure 1 As shown, the geometric structure of the three sections of the stator bar is: the first section of the beginning straight line 1, the second section of the corner 2 and the third section of the hypotenuse straight line 3 structure, the bar rotation angle θ, the corner radius R, the bar section height h, The gap d between the hypotenuses of the wire rods, the distance L from the beginning of the corner of the wire rods to the anti-halation lap;

[0021] (2) if figure 2 As shown, the different geometric positions of the anti-halation lap wire rods, φ are respectively: the distance from the first straight line at the beginning of the first segment, the beginning of the corner of the wire rod to the anti-halation lap joint is a negative value, when L≤0, such as figure 2 As shown, the...

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Abstract

The invention relates to a high-voltage stator bar anti-corona structure. The structure is capable of effectively improving a voltage resistance level of stator windings and operates safely. According to geometry characteristics of end parts of large-scale motor stator bars, a conventional straight anti-corona structure is turned into a special inclined anti-corona structure, a beveled electric field among the winding bars is improved and optimized, the symmetry and the consistency of the electric field among the windings are ensured, and the corona onset voltage level and the voltage resistance capability of the windings are improved. The inclined anti-corona structure has the technical advantages of simple structure, good operation performance, high universality and the like and is suitable for the anti-corona design of various kinds of large-scale motor stator bars, in addition, the conventional straight anti-corona structure can be transformed and improved conveniently.

Description

technical field [0001] The invention relates to an anti-corona structure for a stator bar of a large-scale electric motor which improves the withstand voltage level of a winding. Background technique [0002] The end of the stator bar of the high-voltage motor is covered with an anti-corona layer structure, the purpose is to reduce the electric field at the end and improve the withstand voltage level. The anti-corona layer at the end is made of non-linear material and has a one- or multi-segment structure, which is difficult to design. At present, a large number of studies have been carried out on the optimal design of anti-halation structures at home and abroad, mainly using research methods based on experiments and supplemented by calculations. The main purpose of these studies is to increase the corona inception voltage level of a single bar. [0003] In fact, the corona inception voltage of a single bar is relatively high, which cannot guarantee the withstand voltage l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/40
Inventor 孙永鑫潘延明隋银德满宇光袁晓红胡春秀
Owner HARBIN ELECTRIC MASCH CO LTD
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