In order to overcome the shortcomings of the traditional elevator brake installed at the top and large size and heavy weight,combining with working mechanism of electromagnetic disk brake for vehicle,a new direct-drive elevator electromagnetic brake structure is proposed,and equivalent magnetic circuit diagram of the structure is obtained.Based on Kirchhoff's law and energy virtual displacement method,the mathematic analytic expressions of the structure are deduced,and the mathematical expressions of electromagnetic force in horizontal direction are discussed under different current and displacement conditions.By means of finite element method (FEM),the three-dimensional model is established.By comparing the simulation value and the calculated value of the current and displacement relationship,the correctness of the mathematical formula of electromagnetic force is verified from multiple perspectives,at the same time the feasibility of the structure is proved.%针对传统曳引式电梯制动器安装在顶层且尺寸和重量大的缺点,结合车用电磁盘式制动器的工作机理,提出一种适用于直驱电梯的新型电磁制动器结构,得出该结构的等效磁路图.利用基尔霍夫定律和能量虚位移法,推导出此结构的数学解析式,讨论了在不同电流和位移情况下水平方向的电磁力数学表达式.通过有限元分析软件建立三维模型,对电流、位移关系的仿真值和计算值进行对比,多角度验证了电磁力数学公式的正确性,同时证明了该结构的可行性.
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