【作者】 刘庆；

【导师】 戈宝军；

【作者基本信息】 哈尔滨理工大学 ， 电机与电器， 2020， 硕士

【摘要】 在工业制造领域,数量最多,分布面最广都集中在大功率风机水泵类负载,其运行方式为节流调节变负荷运行,而深入挖掘定速风机和水泵的节电潜力就显得尤为关键,目前最为普遍的调速方式为全功率变频调速,对于调速范围(30-50)%风机泵类负载并不完全适用,势必会造成系统效率低及投资成本的增加。无刷双馈电机可实现低压变频调速装置控制高压电动机,小容量变频控制装置调节大容量电动机转速的效果。本论文主要研究内容是高压大功率无刷双馈电机设计原理与绕组分析,以及绕组设计方案和控制方法研究,并通过试验验证得出最优设计方案。阐述了高压大功率无刷双馈电动机技术的应用背景,介绍了国内外无刷双馈电机开发现状,并对国内外研究历史与现状进行了概述。对无刷双馈电动机基本结构和原理进行了分析,具体研究了无刷双馈电动机的常用定、转子结构,论述了无刷双馈电机基本运行原理,介绍了高压大功率无刷双馈电机调速原理,电机等效电路分析、运行方式,对电动机能量转换原理分析。对高压大功率无刷双馈电动机设计与控制进行计算分析。通过电机设计参数及选型原则,对定转子槽配合计算选取;通过电机输出额定转速对高低压绕组极对数进行设计;依据负载实际运行工况转速的需求变化范围计算确定定子功率绕组和调速绕组的极数;通过电机调速范围确定功率绕组和调速绕组的功率分配,设计变频器容量,特别对转子绕组系数用齿谐波法进行计算并分析验证。最后完成高压大功率无刷双馈电机整体电气参数和机械结构设计。通过实验平台对高压大功率无刷双馈电动机系统进行了实验验证,并对变频绕组切入过程中产生的电流突变现象进行分析,提出电流突变的解决方案,提升无刷双馈电机运行稳定性。并对样机现场实际运行效果进行节能效益分析,课题所产生的社会效益进行论述。更多还原

【Abstract】 In the field of industrial manufacturing,the largest number and widest distribution are concentrated in high-power fans and pumps,whose operation mode is throttling and variable load operation.It is particularly critical to deeply tap the power saving potential of constant speed fans and pumps.At present,the most common speed regulation mode is full power frequency conversion speed regulation,which is not fully applicable to fan and pump load with speed range of(30-50)%,It is bound to cause low system efficiency and increase investment cost.Brushless doubly fed machine(BDFM)can control high-voltage motor by low-voltage frequency conversion speed regulation device,and speed regulation effect of large-capacity motor by small capacity frequency conversion control device.The main research content of this paper is the design principle and winding analysis of high-voltage and high-power brushless doubly fed machine,as well as the research of winding design scheme and control method,and the optimal design scheme is obtained through experimental verification.Describe the application background of high voltage and high power brushless doubly fed machine technology,introduces the development status of brushless doubly fed machine at home and abroad,and summarizes the research history and status quo at home and abroad.The basic structure and principle of brushless doubly fed motor(BDFM)are analyzed.The common stator and rotor structures of BDFM are studied in detail.The basic operation principle of BDFM is discussed.The speed regulation principle,equivalent circuit analysis and operation mode of high voltage and high power brushless doubly fed motor are introduced.The energy conversion principle of motor is analyzed.The design and control of high voltage and high power brushless doubly fed motor(BDFM)are calculated and analyzed.According to the motor design parameters and selection principle,the stator and rotor slot coordination calculation and selection;through the motor output rated speed to design the pole pairs of high and low voltage winding;according to the actual load operating conditions of the speed demand range to determine the number of stator power winding and speed regulating winding;through the motor speed range to determine the power distribution of power winding and speed regulating winding,design change The capacity of frequency converter,especially the rotor winding coefficient,is calculated and analyzed by tooth harmonic method.Finally,the overall electrical parameters and mechanical structure design of the high-voltage and high-power brushless doubly fed machine are completed.Through the experimental platform,the high-voltage and high-power brushless doubly fed motor system is verified,and the phenomenon of current mutation in the process of variable frequency winding cut in is analyzed,and the solution of current mutation is proposed to improve the operation stability of brushless doubly fed machine.It also analyzes the energy-saving benefits of the actual operation effect of the prototype,and discusses the social benefits generated by the subject.更多还原