超磁致伸縮作動器磁路優(yōu)化設(shè)計
[Abstract]:In order to improve the magnetic circuit environment and improve the working performance of giant magnetostrictive material (GMM), based on the analysis of the working principle and GMM characteristics of the giant magnetostrictive actuator, it is proposed to reduce the magnetic leakage. The design principle is to increase the magnetic field intensity and to improve the uniformity of the magnetic field intensity. The magnetic field intensity on the axis of the GMM rod is taken as the evaluation criterion. The electromagnetic finite element analysis of magnetic circuit based on ansoft maxwell is carried out, and the influence of the structure parameters of the key component of magnetic circuit on the intensity and uniformity of magnetic field is obtained. Based on Gao Si's magnetic flux theory, the causes of this phenomenon are analyzed, and the structural parameters are designed and optimized. The experimental results show that the maximum magnetic field intensity on the axis of GMM rod is increased from 55.4 Ka / m to 70.35 Ka / m, with an increase of 26.98, and the magnetic field uniformity is increased from 44.22% to 99.5%. The results show that the end cap is mainly used to reduce the magnetic leakage, and the increase of magnetic field intensity and too large or too small diameter and thickness will lead to the increase of magnetic leakage. The U type magnetic conductive sheet is mainly used to improve the magnetic circuit environment and increase the uniformity of magnetic field intensity.
【作者單位】: 北京航空航天大學(xué)自動化科學(xué)與電氣工程學(xué)院;
【基金】:國家自然科學(xué)基金(11272026)
【分類號】:TM273
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