【作者】 林峰；

【导师】 曲荣海；

【作者基本信息】 华中科技大学 ， 电气工程， 2018， 硕士

【摘要】 环境污染以及化石能源日渐匮乏引发了人们对发展绿色经济,开发清洁能源以及提高能源综合利用效率的强烈需求。普及风电与全电飞机,有望优化现有能源结构以及减少大气污染,对地球环境产生积极而深远的影响。在风力发电以及电气化航空推进设备的发展推广中,超高转矩密度、超高功率密度电机是其技术瓶颈所在。全超导电机的转矩密度、功率密度理论上远高于常规电机,在海上风电、全电飞机等场合具有广阔的应用前景。而全超导电机自身具有造价高昂、内部结构复杂等缺点,仍处于研究攻关阶段。本文主要进行全超导磁齿轮复合电机的电磁研究,为全超导电机提供一种新的解决方案。具体工作从以下几个方面展开:首先从海上风力发电机与航空飞机的实际技术问题,论述高转矩密度与高功率密度电机的实际需求。简要介绍超导电机的提出原因及其应用前景,并梳理高温超导电机的国内外研究现状。接着对超导电机中特有技术问题及其结构进行阐述,包括超导技术特性、超导线材以及低温系统与失超保护系统等。总结归纳超导电机在设计过程中区别于常规电机的技术问题。介绍超导电机的各类拓扑结构,比较各类拓扑结构的优势与不足。介绍现有的全超导电机拓扑结构,总结此类拓扑结构的共同特点。然后提出全超导磁齿轮电机的拓扑结构,详细介绍其结构特点以及工作原理。随后从电机电、磁负荷选择、磁齿轮结构参数设计、超导绕组设计等方面详细介绍一台115 kW的全超导磁齿轮电机的电磁设计过程。并从磁场分析、反电势分析、转矩分析以及效率计算等方面对全超导磁齿轮电机的性能进行综合分析。最后对该电机的电磁性能进行优化分析,包括调制环参数对电机性能影响、最优传动比选择以及电机运行效率优化提高等。并从转矩密度、电机体积、重量以及造价等方面,对全超导磁齿轮电机、常规全超导同步电机及普通永磁同步电机进行对比。本文成果可为全超导电机的进一步研究提供参考。更多还原

【Abstract】 The problem of environmental pollution and the scarcity of fossil fuels has created a strong demand for the development of green economy,the development of clean energy and the improvement of the comprehensive utilization efficiency of energy.The popularization of wind power and all-electricity aircraft is expected to optimize the existing energy structure and reduce atmospheric pollution,with far-reaching effects on the global environment.In wind power generation and electrified aviation propulsion equipment,ultra-high torque density,ultra-high power density motors are the technological bottlenecks.The torque density and power density of fully superconducting machine are theoretically much higher than conventional motors,and it has broad application prospects in offshore wind power,all-electric aircraft and other occasions.The fully superconducting machine itself has the disadvantages of high cost and complicated internal structure,and is still in the research and development stage.This paper mainly focuses on the electromagnetic research of a superconducting magnetic geared machine and provides a new solution for fully superconducting machines.The specific work starts from the following aspects:First of all,from the actual technical problems of offshore wind turbines and aviation aircraft,the demand for high torque density and high power density machines is discussed.The reason and application prospect of superconducting machine are briefly introduced.Then combed the research status of high-temperature superconductor at home and abroad.The technical problems and structures unique to the superconducting machine are then described,including superconducting technical characteristics,superconducting wires,and cryogenic systems and quench protection systems.Summarize the technical problems of the superconducting machine in the design process that distinguish it from the conventional machine.Introduce all kinds of topological structure of superconducting machines,compare the advantage and insufficiency of each kind of topological structure.Introduce the existing fully superconducting topologies and summarize the common features of them.Then,the topological structure of the superconducting magnetic geared machine was put forward,and its structure characteristics and working principle were introduced in detail.Subsequently,the design process of a 115 kW superconducting magnetic geared machine was introduced in detail from aspects of electrical and magnetic load selection,magnetic gear design,and superconducting windings.The comprehensive analysis of the performance of the superconducting magnetic geared machine is carried out from the aspects of magnetic field analysis,back electromotive force analysis,torque analysis and efficiency calculation.Finally,the electromagnetic performance of the machine is optimized,including the influence of the modulation loop parameters on the machine performance,the optimum transmission ratio selection,and optimization of machine operating efficiency.And from the torque density,power density,volume,weight and cost,etc.,the comparison of the superconducting magnetic geared machine,the conventional fully superconducting synchronous machine and the ordinary permanent magnet synchronous machine.The results of this paper can provide reference for further research on the fully superconducting machine.更多还原