新型双层半插入式交替极永磁电机的解析建模  

Analytical modeling of novel double-layer semi-inset consequent-pole permanent magnet machine

作　　者：倪有源[1] 张亮 钱威 NI Youyuan;ZHANG Liang;QIAN Wei(School of Electrical Engineering&Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电机与控制学报》2023年第9期42-52,共11页Electric Machines and Control

基　　金：安徽省自然科学基金(2008085ME179);高等学校学科创新引智计划资助(BP0719039)。

摘　　要：为了提高永磁电机的电磁转矩,提出一种新型双层半插入式交替极永磁电机模型。内层为交替极磁极,外层为表贴式永磁体,内外层永磁均为径向磁化。采用二维子域模型法,将求解域划分为定子槽、定子槽口、气隙、外层永磁和内层永磁共5个子域。根据拉普拉斯和泊松方程,通过分离变量法获得各子域矢量磁位的通解,再根据边界条件并求解矩阵方程,获得各子域矢量磁位的直流分量和谐波系数。以一台8极9槽新型电机为例,计算了电机的气隙磁密、空载感应电动势和电磁转矩,结果表明,在永磁用量相同的前提下,与传统的表面插入式电机相比,新型电机具有更高的电磁转矩。最后,用有限元法验证了解析模型的正确性。In order to improve the electromagnetic torque of permanent magnet machines,a novel doublelayer semi-inset consequent-pole permanent magnet machine model was proposed.On the basis of an inner layer with consequent-pole magnets,an outer layer with surface-mounted magnets was added,and all the magnets were radially magnetized.Using a two-dimensional accurate subdomain model method,the solution domains were divided into the stator slot,the stator slot,the air-gap,the outer layer magnet and the inner layer magnet subdomains.According to the Laplace/Poisson equations,the general solution of the vector magnetic potential in each subdomain was derived by a variable separation method.According to the boundary and interface conditions,the matrix equation was solved and the DC component and harmonic coefficients of the vector magnetic potential in each subdomain were obtained.An 8-pole/9-slot machine was investigated,the air-gap flux density,the no-load back EMF and the electromagnetic torque were calculated.The results show that with the same amount of magnets,the novel double-layer semi-inset consequent-pole permanent magnet machine has a higher electromagnetic torque than the traditional surface-inset machine.Finally,correctness of the analytical model was verified by a finite element method.

关 键 词：双层半插入交替极永磁电机 子域模型 矢量磁位 解析模型 有限元法 电磁转矩 

分 类 号：TM351[电气工程—电机]