文章基本信息

标题：A novel bidirectional and dual-redundancy hybrid electromagnetic brake for aircraft
本地全文：下载
作者：Chunyan Xiao ; Shuai Gao ; Jun Zhang 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2016
卷号：8
期号：9
DOI：10.1177/1687814016669478
语种：English
出版社：Sage Publications Ltd.
摘要：This article presents a novel bidirectional and dual-redundancy hybrid electromagnetic brake with strong retention force and high reliability. The electromagnetic brake with two large working air gaps consists of two stationary components and a movable component which is fixed to the shaft. The stationary components are composed of iron cores, yokes, and two sets of coil windings in which one set of redundant ones can improve reliability. The movable component consists of a permanent magnet ring and yokes. When the power is outage, the permanent magnet can provide a constant retention force to keep the movable component park at end position. When the power is on, the working magnetic fluxes of the hybrid electromagnetic brake are generated by both the permanent magnet and the coil windings carrying DC forward or reverse current. The magnetic fluxes produced by coil windings control the movement direction of the movable component to realize braking or unlocking. First, the constraint conditions of magnetomotive force to ensure bidirectional movements were deduced using the equivalent magnetic circuit method. Then, the magnetic flux density and the electromagnetic forces were calculated by the finite element method. Simulation results validated the theoretical analysis and the reasonable design. This electromagnet can be used for the electrical brake not only in the more electric aircraft but also in other applications.
关键词：Hybrid electromagnetic brake; bidirectional electromagnet; retention force; finite element method