25 kWh/100 kW储能飞轮轴向磁轴承设计与分析  

The Design and Analysis of the Axial Magnetic Bearing of Energy-Storage Flywheel at 25 kWh/100 kW

作　　者：张秀华[1,2] 白强 姚宏 苏亚峰[1] 溥江 ZHANG Xiuhua;BAI Qiang;YAO Hong;SU Yafeng;PU Jiang(School of Mechanical Engineering, Guizhou University, Guiyang 550025, China;Shool of Mechatronics Engineering, Guizhou Minzu University, Guiyang 550025, China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州民族大学机械电子工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2018年第2期64-67,共4页Journal of Guizhou University:Natural Sciences

基　　金：贵州大学引进人才项目资助(贵大人基合字[2015]-51号)

摘　　要：储能飞轮支承系统性能的稳定性是转子系统高速正常运行的前提。磁轴承作为支承系统的核心部件,其结构设计是系统稳定性的根本。针对25 k Wh/100 k W储能飞轮系统的特点,进行磁轴承设计时,用横截面为梯形的永磁环取代传统的矩形永磁环,得到一种新型的永磁磁轴承结构。采用磁路分析及有限元方法相结合的手段对该磁轴承结构进行了分析,并对这两种结构的磁轴承性能做了对比,结果表明该磁轴承的电磁磁路在工作气隙之外基本不经过永磁环本身,不产生附加径向力;该磁轴承具有效率高,电磁线圈损耗小,励磁线圈电流低,发热小,便于控制等特点,适用于大型储能飞轮支承系统。The high-speed operation of rotor system is based on the premise of the stability of energy storage flywheel support system. The magnetic bearing is the core component of the support system and its structural design is the key to the systematic stability. Given the characteristics of the 25 k Wh/100 k W energy storage flywheel system,the traditional rectangular permanent magnetic ring is replaced with the trapezoidal one,thus forming a new cross-section permanent magnet bearing. The magnetic bearing structure was analyzed by combining magnetic circuit analysis and finite element method. The performances of the two kinds of magnetic bearing structures were compared. Results show that almost no electromagnetic circuit passes the permanent magnetic ring outside the working air gap and no additional radial force is generated. Besides,the trapezoidal magnetic bearing is more efficient with small loss of electromagnetic coil,low current of field coil,less heat,easy control. It is more applicable for large-scale energy storage flywheel system.

关 键 词：储能飞轮 磁轴承 支承系统 结构设计 有限元 

分 类 号：TH133.7[机械工程—机械制造及自动化]