The axial flux permanent magnet(AFPM)generator with double-sided internal stator structure is highly suitable for vertical axis wind turbines due to its high power density.The performance of the AFPM generator with do...The axial flux permanent magnet(AFPM)generator with double-sided internal stator structure is highly suitable for vertical axis wind turbines due to its high power density.The performance of the AFPM generator with double-sided internal stator structure can be improved by the reasonable design of electromagnetic parameters.To further improve the overall performance of the AFPM generator with double-sided internal stator structure,multivariable(coil widthω_(c),permanent magnet thickness h,pole arc coefficient α_(p) and working air gap l_(g))and multi-objective(generator efficiencyη,total harmonic distortion of the voltage THD and induced electromotive force amplitude EMF)functional relationships are innovatively established.Orthogonal analysis,mean analysis and variance analysis are performed on the influence parameters by combining the Taguchi method and response surface methodology to study the influence degrees of each influence parameter on the optimization objectives to determine the most appropriate electromagnetic parameters.The optimization results are verified by 3D finite element analysis.The optimized APFM generator with double-sided internal stator structure exhibits superior economy,stronger magnetic density,higher efficiency and improved power quality.展开更多
A comparison of two modular linear permanent-magnet vernier(LPMV)machines is presented.A modular LPMV machine with a partitioned primary,which can significantly improve the modulation effect,is proposed.Benefitting fr...A comparison of two modular linear permanent-magnet vernier(LPMV)machines is presented.A modular LPMV machine with a partitioned primary,which can significantly improve the modulation effect,is proposed.Benefitting from the partition design,the space conflict between the permanent magnet(PM)and the armature magnetic field is relieved.First,the topologies of modular LPMV machines with and without a partitioned primary are presented.Then,the effect of the partitioned primary on the modular LPMV machine is analyzed using flux modulation theory.Moreover,analytical expressions for the trapezoidal permeance are derived.In addition,the harmonic components,back electromotive forces,and thrust forces of the machines with and without the partitioned primary are comparatively analyzed.The results reveal that the thrust force density of the LPMV machine with a partitioned primary is increased by 32.3%.Finally,experiments are performed on a prototype machine for validation.展开更多
直线旋转永磁(linear and rotary permanent magnet,LRPM)电机是一种具有直线、旋转和螺旋驱动的两自由度电机,在智能制造装备、交通运输装备、新能源发电、国防装备等领域具有广阔的应用前景。主要论述直线旋转永磁电机的基本特点,分...直线旋转永磁(linear and rotary permanent magnet,LRPM)电机是一种具有直线、旋转和螺旋驱动的两自由度电机,在智能制造装备、交通运输装备、新能源发电、国防装备等领域具有广阔的应用前景。主要论述直线旋转永磁电机的基本特点,分析几种典型的直线旋转电机的结构及工作原理,提出一种新的直线旋转永磁电机拓扑结构。在此基础上,分析直线旋转永磁电机的设计与优化方法,推导磁路独立的直线旋转永磁电机数学模型。在直线、旋转和螺旋驱动需求下,分别研究几种典型直线旋转永磁电机的控制技术。针对目前直线旋转永磁电机控制技术的需求,提出一种多运行模式协调控制策略。最后,给出了直线旋转电机及控制技术的发展趋势,展望其的应用前景。展开更多
基金funded by Project Supported by Postdoctoral Science Foundation of Jiangsu Province,Grant No.2019k237.
文摘The axial flux permanent magnet(AFPM)generator with double-sided internal stator structure is highly suitable for vertical axis wind turbines due to its high power density.The performance of the AFPM generator with double-sided internal stator structure can be improved by the reasonable design of electromagnetic parameters.To further improve the overall performance of the AFPM generator with double-sided internal stator structure,multivariable(coil widthω_(c),permanent magnet thickness h,pole arc coefficient α_(p) and working air gap l_(g))and multi-objective(generator efficiencyη,total harmonic distortion of the voltage THD and induced electromotive force amplitude EMF)functional relationships are innovatively established.Orthogonal analysis,mean analysis and variance analysis are performed on the influence parameters by combining the Taguchi method and response surface methodology to study the influence degrees of each influence parameter on the optimization objectives to determine the most appropriate electromagnetic parameters.The optimization results are verified by 3D finite element analysis.The optimized APFM generator with double-sided internal stator structure exhibits superior economy,stronger magnetic density,higher efficiency and improved power quality.
基金Supported in part by the National Natural Science Foundation of China under Grant 51977099in part by the National Natural Science Foundation of Jiangsu Higher Education Institutions under Grant 22KJB470010.
文摘A comparison of two modular linear permanent-magnet vernier(LPMV)machines is presented.A modular LPMV machine with a partitioned primary,which can significantly improve the modulation effect,is proposed.Benefitting from the partition design,the space conflict between the permanent magnet(PM)and the armature magnetic field is relieved.First,the topologies of modular LPMV machines with and without a partitioned primary are presented.Then,the effect of the partitioned primary on the modular LPMV machine is analyzed using flux modulation theory.Moreover,analytical expressions for the trapezoidal permeance are derived.In addition,the harmonic components,back electromotive forces,and thrust forces of the machines with and without the partitioned primary are comparatively analyzed.The results reveal that the thrust force density of the LPMV machine with a partitioned primary is increased by 32.3%.Finally,experiments are performed on a prototype machine for validation.
文摘直线旋转永磁(linear and rotary permanent magnet,LRPM)电机是一种具有直线、旋转和螺旋驱动的两自由度电机,在智能制造装备、交通运输装备、新能源发电、国防装备等领域具有广阔的应用前景。主要论述直线旋转永磁电机的基本特点,分析几种典型的直线旋转电机的结构及工作原理,提出一种新的直线旋转永磁电机拓扑结构。在此基础上,分析直线旋转永磁电机的设计与优化方法,推导磁路独立的直线旋转永磁电机数学模型。在直线、旋转和螺旋驱动需求下,分别研究几种典型直线旋转永磁电机的控制技术。针对目前直线旋转永磁电机控制技术的需求,提出一种多运行模式协调控制策略。最后,给出了直线旋转电机及控制技术的发展趋势,展望其的应用前景。
