Optimization method of air-gap magnetic field of built-in permanent magnet motor based on Taguchi method

Abstract

The invention discloses an optimization method of an air-gap magnetic field of a built-in permanent magnet motor based on a Taguchi method, and belongs to the field of multi-parameter multi-objective optimization of the built-in permanent magnet synchronous motor. The method is characteried in that four variables, namely the thickness of a permanent magnet, a magnetization angle, the angle of the permanent magnet and the proportion of an auxiliary magnetic pole, are taken as optimization variables, the total harmonic content (THD) of the air-gap magnetic field and the fundamental wave amplitude of the air-gap magnetic field serve as optimization targets, then a preliminary optimization scheme is determined through an orthogonal experiment, then the influence of optimization variables on the optimization targets is researched according to relative importance, and a final optimization scheme is determined; and finally, the harmonic content of the air-gap magnetic flux density before and after optimization is compared through finite element simulation, and thus the effectiveness of the optimization method is verified. According to the method, the number of motor optimization simulation experiment groups can be greatly reduced, the design period of the motor is greatly shortened, the optimization efficiency is improved, and large-scale production of the modern motor design industry is facilitated.

Description

technical field [0001] The invention relates to the field of optimization design, in particular to a method for optimizing the air gap magnetic field of a built-in permanent magnet motor based on the Taguchi method. Background technique [0002] With the continuous improvement of process production technology and design theory, permanent magnet motors have received more and more attention. In particular, low-speed, high-torque electric spindle permanent magnet synchronous motors have extremely broad application prospects in fields such as industrial production, oil field exploitation, wind power generation, and ship propulsion. In the CNC machine tool, the electric spindle integrates the machine tool spindle and the spindle motor, which can eliminate the pulley drive and gear drive of the main drive system of the high-speed CNC machine tool, and realize the "zero transmission chain" of the machine tool. Wannan Motor has developed a low-speed high-torque electric spindle per...

AI Technical Summary

Problems solved by technology

Using this structure will introduce a variety of parameter variables, which will affect the air gap flux density of the motor

If traditional parametric simulation is used, it will bring disadvantages such as large number of experimental groups, long design cycle, low optimization efficiency, and unfavorable large-scale industrial application of motors.

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