模块化多单元磁通切换电机设计与特性分析  

Design and Characteristics Analysis of a Modular Elementary Flux Switching Permanent Magnet Machines

作　　者：苏鹏[1] 夏玉佳 花为[2] 李永建[1] 王一维 SU Peng;XIA Yujia;HUA Wei;LI Yongjian;WANG Yiwei(State Key Laboratory of Reliability and Intelligence of Electrical Equipment(Hebei University of Technology),Hongqiao District,Tianjin 300130,China;School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China;Hebei Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability(Hebei University of Technology),Hongqiao District,Tianjin 300130,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津市红桥区300130 [2]东南大学电气工程学院,江苏省南京市210096 [3]河北省电磁场与电器可靠性重点实验室(河北工业大学),天津市红桥区300130

出　　处：《中国电机工程学报》2023年第19期7669-7682,共14页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52007048,52130710);河北省自然科学基金项目(E2021202144);电工装备可靠性与智能化国家重点实验室基金(EERI_OY2020010)。

摘　　要：该文提出一种具有高转矩密度、低转矩脉动的新型模块化多单元磁通切换(modularelementaryfluxswitching permanentmagnet,ME-FSPM)电机结构,研究槽极配合对电磁特性的影响。基于气隙磁场调制原理,从永磁磁场调制的角度阐明ME-FSPM电机气隙磁导调制系数对永磁磁密调制谐波影响规律。由于轴向模块配合与集成环形绕组拓扑,ME-FSPM电机不同槽极配合下具有高绕组因数特征,进而针对性的定义气隙磁导调制系数是决定永磁磁链基波幅值的关键参数。依据气隙磁导调制系数模型,揭示电负荷恒定下转子极数与电磁转矩变化规律。基于气隙磁密分布规律,分析模块配合下齿槽转矩抑制原理,依据槽极配合选择实现齿槽转矩基波抵消以及输出转矩提升,提出ME-FSPM电机槽极配合选择方法。最后,在6槽ME-FSPM电机结构下,选择6槽/7极和6槽/8极结构具有良好的转矩特性,并通过仿真与实验验证理论方法的合理性与有效性。This paper proposes a modular elementary flux switching permanent magnet(ME-FSPM)machine with high torque density and low torque ripple.The influence of stator-slot and rotor-pole combinations on electromagnetic characteristics is investigated based on the air-gap magnetic field modulation theory.Then,the relationships between the air-gap permeability modulation coefficient and the PM flux density modulation harmonics are deduced and analyzed.In addition,the ME-FSPM machines with any stator-slot and rotor-pole combination have a high winding factor due to utilizing the axial modular parts and toroidal armature windings.Thus,the air-gap permeability modulation coefficient is the key parameter influencing the PM flux linkage amplitude.According to the air-gap permeability modulation coefficient model,the variation of electromagnetic torque with different rotor poles is revealed at a constant electrical loading.Based on the distribution of air-gap magnetic density,the principle of cogging torque suppression by modules cooperation is analyzed.According to the stator-slot and rotor-pole combinations,the cogging torque fundamental harmonic is offset.Then the stator-slot and rotor-pole combinations are chosen with attractive torque capability.Finally,ME-FSPM machines with 6 slots7 poles(6s/7p)and 6s/8p are selected due to the high torque density.The simulation and experimental results verify the rationality and effectiveness of stator-slot and rotor-pole combinations analysis of the ME-FSPM machine.

关 键 词：磁通切换电机 模块化多单元 气隙磁场调制 气隙磁导调制系数 

分 类 号：TM351[电气工程—电机]