Hysteresis model-based finite element simulation method for an electromagnetic mechanism containing non-linear permanent magnets

Abstract

The invention discloses a hysteresis model-based finite element simulation method for an electromagnetic mechanism containing non-linear permanent magnets, and the method comprises the steps: S1, building a finite element simulation model of an actual magnetizing and demagnetizing process of a permanent magnet, and carrying out the simulation of magnetic induction intensity vector distribution; s2, determining magnetization directions of different regions of the permanent magnet; s3, establishing a nonlinear permanent magnet hysteresis model; s4, modeling the hysteresis loop of the non-linearpermanent magnet under unsaturated magnetization to obtain a B-H curve of the non-linear permanent magnet under unsaturated magnetization; and S5, based on the FLUX, establishing a simulation model ofthe permanent magnet electromagnetic mechanism, setting the B-H curve as a permanent magnet material parameter in the model, and then simulating each required relay electromagnetic parameter. The invention provides a reliable and accurate simulation calculation method for the existing electromagnetic mechanism containing the non-linear permanent magnet, and the method can also be applied to simulation calculation of other electromagnetic mechanisms containing the non-linear permanent magnet with complex magnetizing conditions or complex shapes.

Description

Technical field [0001] The invention belongs to the field of electromagnetic mechanism simulation methods, and relates to a finite element simulation analysis method of an electromagnetic mechanism containing a nonlinear permanent magnet based on a hysteresis model. Background technique [0002] In recent years, electromagnetic mechanisms have developed towards miniaturization, low power consumption, and high sensitivity. The introduction of permanent magnets can effectively solve these problems. The calculation accuracy of electromagnetic mechanisms containing permanent magnets is the prerequisite and basis to ensure that the design and optimization of such electromagnetic mechanisms achieve the expected results, which makes it necessary to study the modeling calculations of electromagnetic mechanisms containing permanent magnets. [0003] Among the electromagnetic mechanisms with permanent magnets, some of them use nonlinear permanent magnets to obtain better performance. Perman...

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Problems solved by technology

Permanent magnets usually go through the process of magnetization first and then demagnetization in the production process. For nonlinear permanent magnets, the usual calculation method is to perform piecewise linear equivalent of the B-H curve of the permanent magnet after demagnetization according to the recovery line model, but Since the regression line model itself is equivalent to the migration trajectory of the actual operating point of the nonlinear permanent magnet, there is still a large error

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