磁场调制型磁性齿轮的研究

发布时间：2018-01-05 06:35

本文关键词：磁场调制型磁性齿轮的研究　出处：《哈尔滨工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：相比于机械齿轮，基于磁场耦合原理的磁性齿轮具有许多显著的优点，比如减少维护、可靠性高、自具备过载保护、输入输出间存在物理隔离、噪音低、振动小等，但传统的磁性齿轮所能传递的转矩密度较低。新型磁场调制型磁性齿轮因为其永磁体利用率高，所能传递的转矩密度可以和机械齿轮相媲美，甚至更好。本文主要围绕这种磁场调制式磁性齿轮（Field ModulatedMagnetic Gear, FMMG）展开研究。首先，针对FMMG工作原理和结构的特殊性，先采用解析法对其工作原理进行详细的推导和分析，推导了内转子永磁体极对数、调磁环铁心数、外转子永磁体极对数之间所必须满足的数学关系式，并建立了内转子、外转子、调磁环三者之间转矩和转速的数学模型，随后通过二维有限元仿真对其进行验证并做进一步的分析。其次，研究了四种工作模式下FMMG的静态转矩特性和稳态转矩特性，分析了转矩波动的成因并提出了相应的解决方法，之后研究并分析了磁性齿轮加阶跃负载和过载时的动态特性。再次，分析了如何根据不同的工作场合的要求来进行最佳方案的选择，并进行了一系列相关的优化。最后，铁损是FMMG的主要损耗，针对铁损产生的机理，研究了内外转子轭部、永磁体内部、调磁铁心中磁场的分布规律，分析了铁损的分布规律，为效率和温升计算提供理论依据，，同时提出了减小永磁体涡流损耗的有效方法。同时对调磁环的应力分布和形变进行了仿真研究。
[Abstract]:Compared with mechanical gears, magnetic gears based on magnetic coupling principle have many significant advantages, such as reduced maintenance, high reliability, self-overload protection, physical isolation between input and output, low noise. The vibration is small, but the torque density of the traditional magnetic gear is lower. Because of its high utilization ratio of permanent magnet, the new magnetic field modulated magnetic gear can transfer the torque density comparable to the mechanical gear. Even better. This paper focuses on the magnetic field modulation magnetic gear field ModulatedMagnetic Gear. FMMG. Firstly, according to the particularity of FMMG working principle and structure, the working principle of FMMG is deduced and analyzed in detail by analytic method, and the pole logarithm of inner rotor permanent magnet and the core number of adjustable magnetic ring are deduced. The mathematical relationship between pole logarithm of outer rotor permanent magnet and the mathematical model of torque and speed between inner rotor outer rotor and adjustable magnetic ring are established. Then it is verified by two-dimensional finite element simulation and further analyzed. Secondly, the static torque characteristics and steady torque characteristics of FMMG under four working modes are studied, and the causes of torque ripple are analyzed and the corresponding solutions are put forward. Then the dynamic characteristics of magnetic gear with step load and overload are studied and analyzed. Thirdly, we analyze how to choose the best scheme according to different workplace requirements, and carry out a series of related optimization. Finally, iron loss is the main loss of FMMG. In view of the mechanism of iron loss, the distribution law of magnetic field in the yoke of inner and outer rotor, inside of permanent magnet and in the center of adjusting magnet is studied, and the distribution law of iron loss is analyzed. This paper provides a theoretical basis for the calculation of efficiency and temperature rise, and puts forward an effective method to reduce the eddy current loss of permanent magnet. At the same time, the stress distribution and deformation of the adjustable magnetic ring are simulated.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

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