机电集成电磁蜗杆传动的磁场分析

Magnetic Field Analysis of Electromechanical Integration Electromagnetic Worm Drive

摘要: 本文建立了机电集成电磁蜗杆传动的电磁力计算模型，利用电磁学理论推导出空气隙中的电磁力计算公式，得出与电磁力相关的参数变化曲线；采用安培环路法和磁路法计算了系统输出力矩；推导出了均匀磁化情况下不同磁极的磁场强度计算公式，并建立了二维磁场模型，用ANSYS软件分析了不同磁极的磁场强度分布和磁力线分布。研究结果表明：蜗轮与蜗杆之间气隙尽量小；系统设计时蜗轮尽可能采用较多的永磁体数；综合考虑永磁体采用径向充磁方式。

Abstract: In this paper, the electromagnetic force calculation model of electromechanical integrated elec-tromagnetic worm drive is established, and the electromagnetic force calculation formula in air gap is derived by using the electromagnetic theory, and the parameter change curve related to electromagnetic force is obtained. The output torque of the system is calculated by using ampere loop method and magnetic circuit method. The formula for calculating the magnetic field intensity of different magnetic poles under uniform magnetization is derived, and a two-dimensional mag-netic field model is established. The results show that the air gap between worm gear and worm is as small as possible. When the system is designed, more permanent magnets are used. Taking the result of analysis into consideration, the permanent magnet adopts radial magnetization mode.