【作者】 樊华；

【导师】 李勇；

【作者基本信息】 哈尔滨工业大学 ， 电气工程， 2014， 硕士

【摘要】 相比于传统的机械齿轮，永磁齿轮作为一种新型的非接触式传动机构，其主要优点有齿轮之间无接触、去除噪音、不需要特殊的维护和润滑，以及低启动转矩和过载自保护等。除上述优点外，永磁行星齿轮结构具有较大范围的传动比、结构紧凑及过载能力较强等优点，具有一定的研究价值。本文以微小型永磁行星齿轮（Magnetic Planetary Gearbox, MPG）为研究对象，对该齿轮的参数约束及基本方程、永磁齿轮耦合时的特殊问题、内齿圈的多种励磁方式、电励磁结构的绕组分析与设计、混合励磁的结构设计等方面进行了分析和研究。论文首先分析了永磁行星齿轮的工作原理和传动比，采用解析法推导了太阳轮与行星轮、内齿圈与行星轮之间的转矩公式以及传动系统的输出转矩公式。研究了传动系统的参数约束关系，以及传动机构中各磁性齿轮极对数的分配方案和变化规律，得到该永磁行星齿轮的设计参数并建立有限元仿真模型。其次，针对永磁行星齿轮耦合的特殊问题进行了仿真和研究，主要包括耦合特殊性的原因和意义，并以太阳轮和行星轮极距相等时的情况为参照，分析了太阳轮和行星轮极距不相等的情况，行星轮N、S磁极极距不相等的情况和太阳轮及行星轮上磁钢形状变化对传递转矩的影响。此外，对永磁行星齿轮进行了仿真，对其传递转矩和齿槽转矩的大小与规律进行研究，并分析了输入输出角的随动特性。再次，采用有限元法研究了永磁行星齿轮内齿圈的三种励磁方式，先对混合励磁结构的简化单元模型进行了分析，再对定子混合励磁式永磁行星齿轮进行结构设计。对比了定子齿顶部加永磁体、定子槽口加永磁体和定子外侧加永磁体共三种结构，从三种结构中气隙磁密的分布规律入手，分析了定子加入磁钢后对原磁场的影响，并讨论了各混合励磁结构的可行性。最后，针对可调变速比永磁行星齿轮，分析了其调节变速比的原理，设计了电励磁绕组对应三种传动比的分布和连接方式。建立仿真模型，对定子电励磁式永磁行星齿轮的特性进行分析，主要包括静转矩特性，输入输出角的随动特性以及传动系统的负载分析。更多还原

【Abstract】 As a new non-contact transmission mechanism, the permanent magnetgearbox (MPG) has advantages of complete isolation between different gears,noise elimination, free of lubrication and maintenance, low starting torque andauto-protection against overload in comparison with the traditional mechanicalgearbox. Besides these advantages as mentioned above, MPG also has meritsincluding large transmission power, wide range of transmission ratio, compactstructure and strong overload ability, which is absolutely worth researching.In this paper, the miniature MPG has been studied. The main aspects are asfollows: parameter constraint and its basic equations, special problems ofpermanent magnetic gearbox coupling, three excitation methods of ring gear,winding analysis and design of electro-magnetic structure, and structureanalysis of hybrid excitation.Firstly, the operation principle and speed reduction ratio of MPG areanalyzed. The torque equation between sun gear and planetary gear, the torqueequation between ring gear and planetary gear and the torque of drive systemare derived, respectively. Parameter constraints of drive system are studied, andthe pole pairs allocation plan and its variation law of each magnetic gear arediscussed and analyzed. In this way, the design parameter of MPG is obtainedso that simulation model is built.Secondly, special problems of magnetic coupling are simulated andanalyzed, including the research value of coupling particularity. In comparisonwith the condition that polar distance of sun gear is equal to that of planetarygear, the condition that polar distance of sun gear is unequal to that of planetarygear, and that polar distance of north magnetic pole is unequal to that of southmagnetic pole on planetary gear, and the effects of magnetic steel shape ontransmitted torque are analyzed respectively in this article.Thirdly, three excitation methods of ring gear on MPG are analyzed usingfinite element method. The MPG model is simulated, including value andvariation law of transmitted torque and cogging torque, and followingcharacteristic between input angle and output angle. Moreover, structure designand flux density analysis of hybrid excitation MPG are studied, includingcomparison of flux density of MPG under three different excitation of ring gear,and feasibility analysis of hybrid excitation structure.At last, operation principle of modulating speed reduction ratio is analyzed.And distribution and connection of electrical excitation winding is designed in corresponding with three types of speed reduction. Operating characteristics ofelectrical excitation MPG are analyzed, including the static torquecharacteristic, load analysis of MPG and following characteristic between inputangle and output angle.更多还原