Investigation of Double-Side Field Modulation Mechanism in Consequent-Pole PM Machines With Concentrated Windings
Investigation of Double-Side Field Modulation Mechanism in Consequent-Pole PM Machines With Concentrated Windings
复制标题
集中绕组交替极永磁电机双面磁场调制机制研究
DOI：
10.1109/tec.2020.3041658
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发表时间：
2021
影响因子：
4.9
通讯作者：
S. Lyu
中科院分区：
文献类型：
--
作者：
Ya Li;Hui Yang;Heyun Lin;Ling Qin;S. Lyu
本文从双面开槽效应（DSSE）的角度揭示和研究了交替极永磁（CPM）电机的场调制效应（FME），可以表征和阐述其扭矩产生机制。由于 CPM 电机的特点是永磁电机和电枢磁场均由定子/转子齿进行调制，与传统的表面安装永磁 (SPM) 电机相比，它会产生更多的磁场谐波，有助于产生扭矩。首先建立了基于简化永磁磁动势 (MMF) 磁导的模型，以确认 CPM 电机的有效工作谐波。然后基于麦克斯韦应力张量（MST）方法论证和量化了主要气隙场谐波对扭矩产生的贡献。随后通过有限元 (FE) 方法研究了 FME 对具有不同定子槽/转子极组合的 CPM 电机扭矩性能的影响，并与传统 SPM 电机的影响进行了比较。此外，还评估了转子PM参数对CPM机器FME的影响。最后，在 12 槽/14 极 CPM 机器原型上进行实验测量，以验证理论和有限元分析。
In this article, the field modulation effect (FME) of consequent-pole permanent magnet (CPM) machine is revealed and investigated from the perspective of a double-side slotting effect (DSSE), which can characterize and elaborate its torque production mechanism. Since the CPM machine features that both PM and armature fields are modulated by stator /rotor teeth, which generates more field harmonics contributing to the torque production compared with conventional surface-mounted PM (SPM) machine. A simplified PM magneto-motive force (MMF)-permeance based model is first established to confirm the effective working harmonics of the CPM machine. The contributions of dominant air-gap field harmonics to the torque production are then demonstrated and quantified based on Maxwell stress tensor (MST) method. The impacts of FME on the torque performance of the CPM machines with different stator-slot/rotor pole combinations are subsequently investigated by the finite element (FE) method and compared with those of conventional SPM counterparts. Besides, the influences of rotor PM parameters on the FME of the CPM machine are also evaluated. Finally, the experimental measurements on a 12-slot/14-pole CPM machine prototype are carried out to validate the theoretical and FE analyses.