永磁调速器磁路设计与建模分析技术的研究

发布时间：2018-04-02 21:15

  本文选题：永磁调速器　切入点：分离变量法　出处：《东北大学》2013年博士论文

【摘要】：永磁调速器(Adjustable Permanent Magnetic Coupler, APMC)是通过调节气隙长度控制输出转速/转矩的一种全新理念的调速节能设备,采用了纯机械式结构,利用磁场间的作用力传递转矩,实现了非接触传递能量,已成为永磁传动技术应用中的一个研究热点。相比传统的变频调速技术,永磁调速器具有维护方便、容忍对中误差、减小振动传递、避免产生电力谐波污染以及电磁干扰等诸多优点,已经成功应用于电力、石油化工等行业中。但是永磁调速器的应用还远没达到成熟阶段,有很多问题需要进一步研究和完善。为此,本文对永磁调速器的结构、磁路以及建模分析技术进行了深入系统地研究,这些研究工作对永磁调速器的产品化有着重要意义。本文详细地描述了永磁调速器的结构与工作原理,阐述了该设备的创新节能理念；基于永磁调速器的全新磁路原理,在原有结构基础上对设备的结构进行了扩展设计,尝试了不同的结构形式以及气隙调节装置,丰富了永磁调速器的结构系统。二维线性层法建模过于复杂、繁琐,所建立的解析模型不能深入系统地反映设计参数对永磁调速器性能的影响,针对这一关键问题,本文在查阅了大量相关文献的基础上,基于分离变量法建立了永磁调速器的解析模型；讨论了永磁调速器中导体转子的两种设计方案,即单层／多层结构,通过应用解析模型进行数值对比分析,确定了多层结构在提高传动转矩方面的优越性；同时利用ANSYS软件对永磁调速器进行了二维仿真分析,仿真结果证明了所建立解析模型的有效性；最后应用永磁调速器的解析模型进行了参数的优化设计,实现了参数的最优化配置。永磁调速器的数值分析主要采用二维有限元方法进行近似分析,分析结果的精度不高,针对这一问题,本文在查阅了大量相关文献的基础上,基于三维有限元法建立了永磁调速器的电磁场仿真模型；首先通过静态分析,研究了静态时永磁调速器中磁场的分布规律,为接下来动态电磁场的分析打下基础；然后重点对永磁调速器进行了动态仿真分析,研究了涡流场、耦合磁场以及磁场间耦合力的分布规律,探索了结构参数对涡流、涡流损耗以及传动转矩的影响规律。在理论研究的基础上,建造了一台小功率永磁调速器,搭建了实验平台,并进行了实验分析研究,实验结果验证了本文理论研究的正确性。针对涡流回路的路径不规范,回路中的杂散电流较多等问题,本文对永磁调速器现有的磁路结构进行了改进,着重论述了一种含有开槽导体盘的磁路结构；利用ANSYS软件对该磁路结构进行二维仿真分析,仿真结果证明了开槽磁路结构在提高传动转矩方面的优越性；然后利用ANSYS软件对该磁路结构进行三维仿真分析,展示了涡流路径的优化效果,研究了电磁场的动态特性；最后为了增加开槽磁路中的磁通密度,更进一步提高永磁调速器的效率,提出了一种塞满钢块的开槽导体盘设计方法,并且介绍了改进后的开槽磁路结构；利用ANSYS软件对改进后的开槽磁路结构进行二维仿真分析,仿真结果证明了该磁路结构的高效率。
[Abstract]:Permanent Magnetic Speed Governor ( APMC ) is a kind of new idea of controlling the output speed / torque by adjusting the air gap length . The pure mechanical structure is used to transmit the torque by using the force between the magnetic fields . It has been successfully applied in the fields of electric power and petrochemical industry . However , the application of the permanent magnet speed governor has not yet reached the mature stage , and many problems need to be further studied and perfected .
Based on the new magnetic circuit principle of the permanent - magnet speed governor , the structure of the equipment is extended and designed on the basis of the original structure , and the structure system of the permanent - magnet speed governor is enriched . The two - dimensional linear layer method is too complex and complex , and the analytical model established can not systematically reflect the influence of the design parameters on the performance of the permanent - magnet speed governor , and the analytical model of the permanent - magnet speed governor is established based on the separation variable method .
The two design schemes of the conductor rotor in the permanent magnet speed governor , namely , single - layer / multi - layer structure are discussed , and the advantages of the multi - layer structure in improving the transmission torque are determined by applying the analytical model to numerical contrast analysis .
At the same time , the two - dimensional simulation analysis of the permanent magnet speed governor is carried out by ANSYS software , and the simulation results show the validity of the analytical model .
Finally , the optimization design of the parameters is carried out by using the analytical model of the permanent magnet speed governor . The optimization of the parameters is realized . The numerical analysis of the permanent magnet speed governor mainly adopts the two - dimensional finite element method to approximate the analysis , and the accuracy of the analysis result is not high . According to the problem , the electromagnetic field simulation model of the permanent magnet speed governor is established based on the three - dimensional finite element method .
Firstly , through static analysis , the distribution law of magnetic field in the static magnetic speed governor is studied , which lays the foundation for the analysis of the dynamic electromagnetic field .
Based on the theoretical research , a small - power permanent - magnet speed governor is constructed , the experimental platform is built , and the experimental analysis is carried out . The experimental results verify the correctness of the theoretical research . The existing magnetic circuit structure of the permanent - magnet speed governor is improved , and the magnetic circuit structure with slotted conductor plate is emphatically discussed .
The two - dimensional simulation analysis of the magnetic circuit structure is carried out by ANSYS software , and the simulation results show the superiority of the slotted magnetic circuit structure in improving the transmission torque ;
Then using ANSYS software to analyze the structure of the magnetic circuit , the optimization effect of the eddy current path is demonstrated , and the dynamic characteristics of the electromagnetic field are studied .
In the end , in order to increase the magnetic flux density in the slotted magnetic circuit , the efficiency of the permanent magnet speed governor is further improved , a design method of the slotted conductor plate of the full steel block is proposed , and the improved slotted magnetic circuit structure is introduced .
The improved slotted magnetic circuit structure is subjected to two - dimensional simulation analysis by ANSYS software , and the simulation results show the high efficiency of the magnetic circuit structure .

【学位授予单位】：东北大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TH139
，

本文编号：1702134