Structured mesh optimization division method for thermal analysis model of AC motor rotor bar

A technology of rotor bar and model structure, applied in the direction of design optimization/simulation, geometric CAD, etc., can solve the problems of high user requirements, poor quality, low meshing efficiency, etc.

Active Publication Date: 2020-08-25
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

However, since the top surface of the rotor bar is generally polygonal, when using the quadrilateral structured meshing method to mesh it, it is first necessary to divide the polygonal top surface into several quadrilateral regions. The empirical method is generally used in the division of quadrilateral areas, which not only has high requirements for users, but also has low grid division efficiency and poor quality.

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  • Structured mesh optimization division method for thermal analysis model of AC motor rotor bar
  • Structured mesh optimization division method for thermal analysis model of AC motor rotor bar
  • Structured mesh optimization division method for thermal analysis model of AC motor rotor bar

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Embodiment Construction

[0114] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0115] see figure 1 , figure 1 It is a flow chart of the structured grid optimization division method for the thermal analysis model of the AC motor rotor guide bar in the present invention, including the following steps:

[0116] Step (1), select the polygonal top surface of the rotor guide bar model as the grid division area, and establish a rectangular coordinate system with any vertex of the top surface as the coordinate origin on the top surface, and obtain the rectangular coordinates of each vertex of the top surface;

[0117] In step (2), starting from the coordinate origin of the top surface, number the vertices of the top surface and the two randomly selected points on the sides of the top surface in turn, and the specific numbering rules are as follows:

[0118] (2-1) For convenience, each vertex of the top surface is called a corn...

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Abstract

The invention discloses a structured grid optimization division method for the thermal analysis model of the guide bar of the AC motor rotor. The steps are: arbitrarily add a quadrilateral in the polygonal top surface of the thermal analysis model of the rotor bar, and lead lines from each apex of the quadrilateral to two arbitrarily selected points on the vertices of the top surface or sides of the top surface respectively, and connect the polygon top Divide the surface into several quadrilateral regions; use the fruit fly algorithm to obtain the maximum value of the average mass of each quadrilateral region and the corresponding vertex coordinates; obtain the partition method corresponding to the maximum value of the average quality; divide the top surface into For several quadrilateral regions, the rotor bar model is divided into several columnar models with quadrilateral top surfaces, and the structured mesh division of each quadrilateral top surface columnar model is carried out by sweeping method, and the best structured mesh division results are obtained. The invention can reduce grid division time, effectively improve the overall quality of grid division, and improve the accuracy of thermal analysis of AC motors.

Description

technical field [0001] The invention relates to the field of thermal analysis of an AC motor, in particular to a structured grid optimization division method for a thermal analysis model of an AC motor rotor guide bar. Background technique [0002] AC motors are widely used because of their simple structure, low cost, and easy maintenance. However, as the power density of the AC motor continues to increase, the loss per unit volume generated during its operation also increases continuously, which will cause the temperature rise of the motor to continue to increase. If the temperature rise of the motor is too high, it will cause faults such as motor rotor bar breakage and winding insulation damage. Therefore, it is of great significance to conduct thermal analysis research on AC motors to reduce its temperature rise. [0003] At present, the thermal analysis for AC motors mainly includes simplified formula method, equivalent thermal circuit method, finite formula method and ...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06F30/23G06F30/17
Inventor张小平郭宇轩张铸朱广辉姜海鹏陈鸿蔚
OwnerHUNAN UNIV OF SCI & TECH