8_6极单绕组磁悬浮开关磁阻电机建模.docVIP

8/6极单绕组磁悬浮开关磁阻电机建模与分析 嵇小辅，马滔，项倩雯 （江苏大学 电气信息工程学院，江苏镇江 212013） 摘要：针对传统双绕组磁悬浮开关磁阻电机绕组数量较多，电机结构复杂的特点，研究了一种8/6极单绕组磁悬浮开关磁阻电机，每个定子极上只有一套绕组且相互独立。分析了电机的运行机理和导通策略，基于等效磁路法推导了绕组自感和互感模型。为克服建模困难，提出了一种基于辅助函数的数学建模新方法，运用查表法建立了电机径向力和转矩的数学模型，大大提高了模型的实用性。用有限元分析验证了数学模型的准确性，为电机的进一步研究奠定了理论基础。 关键词：磁悬浮开关磁阻电机；单绕组；辅助函数；数学模型；有限元分析 中图分类号：×××××；××××× 文献标志码：A 文章编号：（××××）××-××××-××× Modeling and Analysis of 8/6 Single Winding Bearingless Switched Reluctance Motors JI Xiaofu，MA Tao，XIANG Qianwen， （College of Electrical and Information Engineering，Jiangsu University, Zhenjiang Jiangsu 212013，China） Abstract: In view of the characteristics of traditional bearingless switched reluctance motors (BSRMs) which have too many windings and complex structure,a novel 8/6 structure BSRM which has single winding on a stator pole was analyzed,and every winding was independent of each other.The operation principle and the conduction policy were analyzed in this paper.The self inductance and mutual inductance of every winding were deduced based on the method of equivalent magnetic circuit.A new method of mathematical modeling based on an auxiliary function was proposed to overcome difficulties of mathematical modeling.The mathematical models of radial force and torque were written based on the method of look-up table.The usefulness of mathematical models was improved greatly.The finite element analysis was carried out to verify the accuracy of mathematical models, which provides the theoretical foundation for the further research of this motor. Key words: BSRM;single winding;auxiliary function;mathematical model;finite element analysis 0 引言 磁悬浮开关磁阻电机(Bearingless Switched Reluctance Motor，简称BSRM)具有无磨损、无损耗、体积小、轴向利用率高、可超高速运行等优点，在航空航天、飞轮储能等领域应用前景广阔[1]-[3]。 传统BSRM每个定子齿极上绕有转矩和悬浮力两套绕组，绕组数量较多，电机结构复杂，不利于安装位置和位移传感器。为此，文献[4]和文献[5]分别提出了8/6极单绕组BSRM和12/8极单绕组BSRM的结构，根据不同转子位置下转子受到的磁拉力和转矩与电流的关系，控制各绕组电流的大小以产生所需要的转矩和悬浮力；文献[6]针对12/8极单绕组BSRM提出了双相导通策略，实现了电机的解耦控制；文献[7]和文献[8]分别提出了8/10混合定子极和12/14混合定子极的单绕组BSRM，通过特殊的定子结构实现了径向力和转矩的