【作者】 贾耀荣；

【导师】 徐衍亮；

【作者基本信息】 山东大学 ， 电机与电器， 2013， 硕士

【摘要】 轴向磁场盘式开关磁阻电机结合了盘式电机和开关磁阻电机的优点,特别适合于低速高转矩和轴向空间小的应用场合,近年来逐渐被关注并且具有重要的应用价值。但是目前盘式开关磁阻电机的研究相对较少而且不完整,其设计依靠三维有限元磁场计算,此种方法具有耗时多且不适于优化设计的缺陷,而磁路法正好避免了这些缺点,因此磁路分析仍应是该种电机设计计算的基础。针对该种电机的磁路分析设计,本文主要对其不同转子位置处的磁化曲线及磁路设计过程进行了研究,具体研究内容如下：首先,给出了盘式开关磁阻电机结构、工作原理及优越性、动态模型,同时指出磁路分析设计所必须确知的几个关键位置的磁化曲线。其次,采用解析法对轴向磁场盘式开关磁阻电机转子槽中心线与定子齿中心线对齐位置(不对齐位置)和定、转子齿中心线对齐位置(对齐位置)磁化曲线进行计算。先根据场计算结果和磁阻最小原理分析不对齐位置磁链分布特点且给出每部分磁链计算方法,并以12／8极和6／4极盘式开关磁阻电机为例将其解析计算结果与有限元结果进行比较验证解析法的正确性；对于对齐位置磁化曲线根据两极模型计算磁链和绕组电流关系并将结果与有限元结果进行曲线对比验证解析法的正确性。再次,用解析法计算盘式开关磁阻电机定子齿前沿和转子齿前沿重叠位置(临界重叠位置)磁化曲线,同样根据场计算结果和磁阻最小原理分析临界重叠位置磁链分布特点可知此位置磁链分七部分计算,然后根据不同情况将总磁链乘以不同的系数,使其计算结果适用性更广。最后以12／8极和6／4极盘式开关磁阻电机为例将其解析计算结果与有限元计算结果进行比较验证解析法的正确性。最后,基于以上三个关键位置磁化曲线分析盘式开关磁阻电机的磁路设计过程,对三个关键位置磁化曲线及某一给定电流下的ψ-θ曲线利用不同函数进行模化,然后根据开关磁阻电机的基本平衡方程计算电流和转矩的稳态性能曲线,并将最后计算结果与有限元结果进行比较分析其合理性。更多还原

【Abstract】 The axial flux switched reluctance motor combines the advantages of axial flux motor and switched reluctance one and has found wide application especially in low-speed high-torque or small axial space driven field. The more and more people were attracted attentions to it. But the research of the axial flux switched reluctance motor is limited and incomplete whose design relies mainly on three dimensional magnetic field of the finite element with high precision but much computer time and such method is not practical in the optimal design. To design the motor quickly the paper analyses its steady-state performances in the method of magnetic circuit design, including the following:Firstly, review the working principle of the axial flux switched reluctance motor and the mathematic model and state that the basic of magnetic circuit design is the magnetization curves of some key positions.Secondly, compute the flux linkage plots at aligned and unaligned rotor positions of this kind of motor. On the basis of computing results by magnetic field and the theory of minimum reluctance, we analyze the distribution characteristics of flux linkage at unaligned rotor position and get the analytical results which are compared to the finite element calculating results by the examples of12/8and6/4poles axial flux switched reluctance motors and are verified to have sufficient precision; then according to two-pole model, calculate the flux linkage plot at the aligned position which is verified to agree with the one by the3-D FEM.Then, calculate the flux linkage plot at the position of stator and rotor frontier overlap in analytical method. The flux linkage are segmented seven parts, the sum of these flux linkage is multiplied by a coefficient according to different situations to get the finale result which is verified to have sufficient precision by3-D FEM.Finally, compile the program of the magnetic circuit design of the axial flux switched reluctance motor on the basis of three key position flux linkage plots above which is modeled by different functions and model the Ψ-θ curve at a given current in the same way. Then calculate steady-state curves on the basis of the basic balance equations of switched reluctance motor. The magnetic circuit design results approximately agree with the results by3-D FEM, so this method is reasonable.更多还原