垂直轴风力发电机轴向被动磁轴承设计与分析

Design and Analysis of Axial Passive Magnetic Bearing for Vertical Axis Wind Power Generator

为了消除传统支承形式存在的机械摩擦磨损,降低起动风速,减少维护费用以及延长使用寿命。采用轴向被动磁轴承作为小型风力发电机转子系统的轴向支承结构,在介绍轴向被动磁轴承结构与工作原理基础上,采用磁荷法推导了轴向磁力数学模型,并对其主要参数进行了设计与分析,最后利用Ansoft有限元软件,对其数学模型和参数设计结果进行了验证。理论研究与试验表明,轴向被动磁轴承参数设计合理,轴向承载力满足设计要求,对研制高性能低成本小型磁悬浮风力发电机具有参考和应用价值。

In order to eliminate the mechanical friction and wear of traditional supporting form, reduce the start-up wind speed, cut down the cost of long- term maintenance, and extend its service life, axial passive magnetic bearing （APMB） as the supporting structure of rotor system of small vertical axis wind power generator, was proposed in this paper. The structure and working principle of APMB were introduced, and on that basis, mathematic model for axial magnetic force was deduced by magnetic charge method, and then the main parameters of APMB were designed and analyzed in detail. Finally, the mathematic model and parameter design results were verified by using Ansoft finite element software. The theory analysis and experimental results show that the parameters of APMB are reasonable and the axial bearing capacity satisfy design requirements. It priorities reference and application value for making high performance and low cost small maglev wind power generator.