【作者】 张旭；

【导师】 林明耀； 钱巍；

【作者基本信息】 东南大学 ， 电机与电器（专业学位）， 2021， 硕士

【摘要】 随着家电行业的发展以及人民生活水平的提高,用户越来越关注家用电器的节能环保和智能化。为有效节约我国的稀土资源以及提高洗衣机用户的使用体验,研制高性能洗衣机用铁氧体电机,是推动洗衣机产业技术创新与转型升级、减少稀土需求的重要战略措施。洗衣机用电机作为洗衣机的重要部件,需要具备高效率和低转矩脉动等特性。因此,研制高性能洗衣机电机,对于推动洗衣机的技术进步和发展具有重要的理论意义和工程应用价值。首先,本文介绍洗衣机用电机的发展背景,归纳总结铁氧体永磁同步电机的特点以及国内外研究现状。通过创新切向充磁SPOKE永磁同步电机的转子拓扑结构,提出一种新型分裂SPOKE铁氧体永磁同步电机。研究其在洗衣机洗涤和脱水工作点的效率和转矩脉动,通过仿真软件ANSYS验证了理论分析的正确性。本课题设计的电机具有高效率、低转矩脉动的优点,但也对加工精度提出了较高要求。其次,为了提高电机效率,提出一种考虑控制方式的损耗分析法,十分适合于电机的双工况效率的分析。为了抑制在高速脱水运行时弱磁电流导致的转矩脉动,结合仿真,提出一种冻结静态磁导率来分离瞬态转矩的方法。通过提取影响磁阻转矩脉动分量的关键参数,将大大降低高速运行点的转矩脉动。为了抑制在低速洗涤运行时的转矩脉动,采用遗传算法来优化转子拓扑,极大程度地削弱了转矩脉动。最后,将优化后的设计方案与企业初始方案进行全方面的对比,验证了本课题设计电机的先进性,并通过加工样机并进行测试,证明了该方案达到了预定的设计目标和效果。更多还原

【Abstract】 With the development of the home appliance industry and people’s living standards,clients are paying more attention to the environmental protection and artificial intelligence of household appliances.In order to effectively save chinese rare earth resources and improve users’ experience of washing machines,research on ferrite motors for high-performance washing machines is an important strategic to promote technological innovation of the washing machine industry and reduce the demand for rare earths.As an important component,washing machine motors need to have high efficiency and low torque ripple.Therefore,the study of high-performance washing machine motors has important significance and engineering application value for promoting the technological progress of washing machines.First of all,this thesis introduces the development background of motors for washing machines,summarizes the characteristics of ferrite PMSM and the current research status in china and abroad.By innovating the rotor topology of the tangentially magnetized SPOKE PMSM,a new type of split SPOKE ferrite PMSM is proposed.The torque pulsation and efficiency of the washing and spining working points of the washing machine are studied,and the correctness of the theoretical analysis is verified by the simulation software ANSYS.The motor designed in this subject has the advantages of high efficiency and low torque ripple,but it has higher requirements for machining accuracy.Secondly,in order to improve the efficiency of the motor,a loss analysis method considering the control method is proposed,which is of great significance to the analysis of the efficiency of the motor having double working conditions.For the purpose of suppressing the torque ripple caused by the field weakening current during high-speed spining operation,combined with the simulation software ANSYS,an analysis method of freezing the static permeability to separate the transient torque is proposed.Based on this method,the key parameters that affect the pulsation component of reluctance torque are extracted,and the torque ripple at the high-speed operating point is effectively controlled to a lower level.To suppress the torque pulsation during low-speed washing operation,genetic algorithm is used to optimize the rotor topology,which achieved effective result.Finally,the optimized design scheme was compared with the initial one of the company in all aspects,which verified the advantage of the motor designed in this subject,and the prototype machine was tested,which proved that the design reached the predetermined goal.更多还原