新型双绕组无轴承磁通切换永磁电机的设计与分析  

Design and analysis of novel double-winding bearingless flux-switching permanent magnet machine

作　　者：孙宇新[1] 吴昊洋 施凯[1] 唐敬伟 沈启康 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《排灌机械工程学报》2017年第12期1096-1104,共9页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51677081);2014年江苏省普通高校研究生科研创新计划项目(KYLX_1047);江苏省高校优势学科资助项目;江苏大学"青年骨干教师培育工程"

摘　　要：为了克服传统的转子永磁型无轴承电机的永磁体冷却条件差、散热困难、转子机械强度低等问题,提出了一种新型无轴承磁通切换永磁电机.该电机绕组和永磁体均放在定子上,转子仅由带有凸极的铁心组成,转子结构简单,适合需要1次性转子的人工血液泵的场合.该电机结合了无轴承永磁电机和磁通切换永磁电机的特性,具有悬浮力密度和转矩密度高、悬浮力脉动和转矩脉动低、转矩和悬浮力耦合程度低以及直接方便的悬浮力调节性能等优点.首先介绍了该电机的结构和运行原理,其次建立了电磁转矩和悬浮力的数学模型,以增大转矩密度与悬浮力密度和减小转矩脉动与悬浮力脉动为目标,对该电机的关键尺寸参数进行了优化设计.最后基于有限元法分析了该电机的空载反电动势、转矩、悬浮力以及转矩与悬浮力之间的耦合等电磁性能,验证了该电机的优点.Conventional bearingless permanent magnet machines usually suffer from the mechanical integrity and thermal problems since PMs are located in the rotor.In order to overcome this problem,a novel bearingless flux-switching permanent magnet（FSPM） machine（BFSPM） is proposed.Both of the windings and PMs are housed in the stator and the rotor is composed of a simple iron core with salient teeth,which is suitable for some applications and the rotor is disposable in medical blood pumps.The proposed BFSPM machine combines the characteristics of bearingless permanent magnet machines and FSPM machines,offering the merits of high torque and suspension force densities,low coupling between torque and suspension force and direct and convenient suspension force regulation performance.First,the machine configuration and operation principle are introduced.Then,the mathematical models of torque and radial suspension force are set up.Furthermore,several leading parameters ofthe machine are optimized to achieve the maximum average values and the minimum ripples of torque and radial suspension force.Finally,by using the finite element method,the electromagnetic performances including the non-load EMFs of torque winding and suspension winding,torque,suspension force and the coupling between torque and suspension force are analyzed,verifying the advantages of the proposed BFSPM machine.

关 键 词：无轴承永磁电机 磁通切换永磁电机 有限元分析 数学模型 优化设计 

分 类 号：TM351[电气工程—电机]