Structured grid optimal division method for alternating current motor rotor conducting bar thermal analysis model
A rotor guide bar and model structure technology, applied in design optimization/simulation, geometric CAD, etc., can solve problems such as high user requirements, low grid division efficiency, and poor quality
Active Publication Date: 2020-05-05
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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[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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The invention discloses a structured grid optimal division method for an alternating current motor rotor conducting bar thermal analysis model. The method comprises the following steps of: randomly adding a quadrangle in the polygonal top surface of the rotor conducting bar thermal analysis model, leading wires from each vertex of the quadrangle to each vertex of the top surface or two points randomly selected on each edge of the top surface respectively, and dividing the polygonal top surface into a plurality of quadrangle areas; adopting a fruit fly algorithm to obtain the maximum value of the average mass of each quadrilateral area and corresponding vertex coordinates; obtaining a partitioning mode corresponding to the maximum value of the average mass; and dividing the top surface intothe plurality of quadrangle areas according to the obtained partitioning mode, dividing the rotor conducting bar model into a plurality of columnar models with quadrilateral top surfaces, and performing structured grid division on each quadrilateral top surface columnar model by using a sweeping method to obtain an optimal structured grid division result. According to the method, the grid division time can be reduced, the overall quality of grid division can be effectively improved, and the precision of thermal analysis of the alternating current motor is improved.
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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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