Permanent magnet motor rotor strength optimization design method based on multi-dimensional visualization

Abstract

The invention relates to a permanent magnet motor rotor strength optimization design method based on multi-dimensional visualization. The method comprises the following steps: solving an equivalent Mises stress and permanent magnet pressure equation of a non-magnetic metal sheath by using an analytical method; constructing a four-dimensional feasible region of the equivalent Mises stress of the non-magnetic metal sheath and the pressure intensity of the permanent magnet, and taking an intersection to obtain a four-dimensional feasible region intersection; and performing dimensionality reduction processing on the four-dimensional feasible region intersection, after a three-dimensional static feasible region and a three-dimensional high-speed feasible region are obtained, taking the intersection, obtaining a three-dimensional feasible region intersection, and solving the sheath thickness and the interference magnitude. The influence of the sheath thickness, the interference magnitude and the rotor speed on the rotor strength is researched by applying a multi-dimensional visualization algorithm, intersection operation is performed on each multi-dimensional visualization graph, the feasible region of the sheath thickness and the interference magnitude meeting the strength requirement in the static state and the high-speed operation state is obtained, robust optimization is conveniently achieved, and the method has the characteristics of intuition and convenience.

Description

technical field [0001] The present application relates to the technical field of rotor strength optimization design of permanent magnet motors, in particular to a multi-dimensional visualization-based method for optimal design of rotor strength of permanent magnet motors. Background technique [0002] Due to its small size, simple structure, high power density, and high efficiency, high-speed permanent magnet motors have broad application prospects in high-speed machine tools, blowers, turbo expanders, etc. [1-4] . In high-speed permanent magnet motors, the permanent magnets of the rotor can be made into an integral structure or a block structure. In the overall structure, the permanent magnet is generally made into a solid cylinder or a hollow cylinder, while in the block structure, the permanent magnet is generally made into a tile-shaped sheet, which is pasted on the surface of the rotor. The structure of the block permanent magnet material improves the permanent magnet....

AI Technical Summary

Problems solved by technology

The efficiency of the traditional rotor strength design method is low, and it is difficult to obtain the optimal value of the sheath structure. Therefore, it is necessary to further consider the optimal design of the rotor strength on the basis of the existing rotor strength analysis model, and obtain the interference amount , sheath thickness and other parameters range

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