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High-voltage motor stator coil corona-preventing structure optimizing method based on electric field analysis

A stator coil and anti-corona structure technology, applied in the shape/style/structure of winding insulation, electrical digital data processing, special data processing applications, etc., can solve problems such as calculation errors, difficult to obtain three-dimensional electric field conditions, etc., to improve simulation Efficiency, the effect of reducing the amount of simulation calculation

Active Publication Date: 2015-01-07
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

This method has the advantages of simple modeling, fast solution, and no need to consider the state of the electric field in space, but the algorithm is difficult to obtain the three-dimensional electric field conditions at corners and wide and narrow sides, and the simplification of the main insulating layer will lead to certain calculation errors

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  • High-voltage motor stator coil corona-preventing structure optimizing method based on electric field analysis
  • High-voltage motor stator coil corona-preventing structure optimizing method based on electric field analysis

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Embodiment Construction

[0025] Hereinafter, the invention will now be described more fully with reference to the accompanying drawings, in which various embodiments are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0026] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0027] Such as figure 2 As shown, the anti-corona structure optimization method of the high voltage motor stator coil based on the electric field analysis includes the following steps:

[0028] A. According to the position of the coil that is more prone to corona phenomenon, determine the anti-corona structure analysis modeling part of the stator coil as the section from t...

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Abstract

The invention relates to a high-voltage motor stator coil corona-preventing structure optimizing method based on electric field analysis. The high-voltage motor stator coil corona-preventing structure optimizing method includes the following steps: determining the stator coil corona-preventing structure analysis modeling portion; obtaining modeling parameters according to the structure and the size of the modeling portion determined in the step (1); building a three-dimensional finite element model of the coil corona-preventing portion according to the modeling parameters obtained in the step (2); defining the characteristics of various materials of a coil and the insulation corona-preventing portion in the calculating model; determining the type of stimulation exerted on the stator coil calculating model and boundary conditions; carrying out finite element calculation and the electric field analysis on the coil calculating model, and judging the problems of the corona-preventing structural design. According to the high-voltage motor stator coil corona-preventing structure optimizing method based on the electric field analysis, the three-dimensional finite element analysis model is built by reasonably simplifying and assuming a practical model, and the visible and accurate corona-preventing layer electric field distribution result is accordingly obtained; in addition, the simulation calculated amount can be effectively reduced, and the simulation efficiency can be improved.

Description

technical field [0001] The invention relates to an optimal design method of an anti-corona structure for a stator coil of a high-voltage motor based on electric field analysis. Background technique [0002] During the operation of the high-voltage motor, due to the concentration of the electric field at the ventilation slot and the outlet slot, the insulation surface potential gradient at the slot at the end of the stator winding coil of the high-voltage motor is very high, and the electric field distribution is extremely uneven. Motors with a rated voltage of 6kV and above The notch of the phase end coil of the stator winding is already in the halo state. When the local field strength reaches a certain value, the gas will be partially dissociated, and a blue halo will appear at the electric nest, generating a corona. The occurrence of corona is accompanied by the generation of heat, ozone and nitrogen oxides, which will accelerate the aging of the insulation structure, sho...

Claims

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Application Information

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IPC IPC(8): H02K3/40G06F17/50
CPCG06F30/398H02K3/40
Inventor 张小平张铸
Owner HUNAN UNIV OF SCI & TECH
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