摘要
针对数控机床进给平台的摩擦问题,提出采用永磁直线磁悬浮电动机来实现无摩擦进给。给出磁悬浮进给平台的结构以及进给平台的运行原理。该进给平台采用永磁直线磁悬浮电动机驱动,永磁直线磁悬浮电动机的动子上有两套绕组,一套绕组用于产生电磁推力,另一套绕组用于产生可控的磁悬浮力。采用Maxwell应力张量法推出了电动机的电磁推力和悬浮力的数学模型。用Ansoft对电磁推力和磁悬浮力进行了有限元分析,证明了采用永磁直线磁悬浮电动机实现直接驱动和无摩擦进给的可行性。
A permanent magnet linear magnetic levitation motor is proposed in order to achieve friction-free feed of NC machine tool feed platform.The structure and principle of magnetic levitation feed platform is introduced.This feed platform is droved by permanent magnet linear magnetic levitation motor.The mover of permanent magnet linear magnetic levitation motor consists of two sets of windings.One is used to generate electromagnetic thrust,the other is used to generate magnetic levitation force.The mathematical model of the motor＇s electromagnetic thrust and levitation force is derived by the Maxwell stress tensor method.Ansoft is used for finite element analysis of the motor＇s electromagnetic thrust and levitation force.The feasibility of direct drive and friction-free feed is verified with permanent magnet linear magnetic levitation motor.
出处
《组合机床与自动化加工技术》
北大核心
2010年第8期27-29,共3页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学家基金项目资助(50975181)
关键词
进给平台
永磁直线磁悬浮电动机
直接驱动
电磁推力
磁悬浮力
feed platform
permanent magnet linear magnetic levitation motor
direct drive
electromagnetic thrust
levitation force
