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

Abstract

The invention discloses a method for optimizing the air-gap magnetic field of a built-in permanent magnet motor based on a Taguchi method, which belongs to the field of multi-parameter and multi-objective optimization of built-in permanent magnet synchronous motors. and the ratio of auxiliary magnetic poles are used as optimization variables, and the total harmonic content (THD) of the air-gap magnetic field and its fundamental wave amplitude are used as optimization targets, and then the preliminary optimization scheme is determined through orthogonal experiments, and then the relative importance As a basis to study the influence of optimization variables on the optimization objective, the final optimization scheme is determined. Finally, the harmonic content of the air-gap magnetic flux density before and after optimization is compared through finite element simulation, which verifies the effectiveness of the optimization method. The invention can greatly reduce the number of motor optimization simulation experiment groups, greatly shorten the design cycle of the motor, and improve the optimization efficiency, which is beneficial to the mass production of the modern motor design industry.

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 and high-torque electric spindle permanent magnet synchronous motors have extremely broad application prospects in the fields of industrial production, oilfield exploitation, wind power generation and ship propulsion. In CNC machine tools, 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 Electric has developed a low-speed and high-torque electric spindle...

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.

Images