摘要：In this paper,a new hybrid excited doubly salient stator-permanent-magnet motor is proposed,where both permanent magnets and DC field windings are located in the *** theory,the mathematical model and design method of the motor are *** corresponding output power equation and the relationship between the flux control capability and the extended speed range are deduced in *** using an efficient "one-step" three-dimensional(3D) finite element method,the electromagnetic performances are analyzed,in which the leakage flux outside the stator circumference and end-effect are taken into *** on the operation principle of the motor,the control strategy and scheme are developed and implemented *** experimental results and finite element analysis show that the proposed motor not only maintains the advantages of doubly salient permanent magnet motors,but also offers high energy efficiency over a wide speed range,which makes the motor an interesting candidate for electric vehicles.

摘要：The 14 MeV, 400 μA compact cyclotron is under construction at China Institute of Atomic Energy (CIAE). The design of main magnet and the result of beam dynamics in the cyclotron will be described in this paper, including the choice of main parameters of magnet, the method of shimming isochronous field in the compact cyclotron and optimization of the magnetic field in central region. The beam will be accelerated to 14.6 MeV by optimizing the magnet structure.

摘要：In this paper, a design method for ocean wave permanent magnet synchronous generator(PMSG)is proposed with new performance criteria to obtain better output performance at the cost of less permanent magnet material. Besides, a simple equivalent analytical geometry method is put forward to calculate the sizes of permanent magnets. Based on geometric and electromagnetic models, four types of rotor structures are compared, i.e., embedded, tangential, tile surface mount and convex surface mount structures. The designs and comparisons of machine are performed with the same permanent magnet volume. Moreover, the influences of mechanical pole-arc coefficient of tile surface mount PMSG on electrical efficiency, output power, material corrosion, core loss, and torque ripple are investigated. Finite-element analysis method is applied to verify the results using Ansoft/Maxwell.

摘要：解析法在遇到电动机电磁场瞬态问题时凸显其弊端,有限元法是目前广泛引用的电磁数值计算方法。而针对航空交流电源中无刷同步发电机的有限元电磁分析的研究较少,因此以某型航空交流电源主发电机为研究对象,阐述了应用magnet软件做电磁瞬态仿真的原理与建模步骤,并仿真了同步发电机在空载工况下的电磁场分布。通过实测对比,证明了模型的实用性。该模型也可以作为元件级封装在Simulink中做进一步的航空电源系统仿真研究,并对其它类型航空电源的计算机辅助设计提供了实际参考价值。

摘要：基于magnet有限元分析软件,设计了额定功率为10 kW的永磁同步发电机。对永磁体平行和径向两种充磁方式所产生的气隙磁动势进行了静态磁场分析。通过采用不均匀气隙和永磁体平行充磁的方法,消弱了气隙磁动势谐波,改善了发电质量。对电机空载电动势波形进行了谐波分析,并对发电机的阻性负载特性进行了仿真分析。结果表明该方案设计合理,满足各项性能指标要求。该研究结果对永磁同步发电机的工程应用具有一定的参考价值。

摘要：对于航空交流电源中交流励磁机的旋转电枢式结构,有限元电磁分析的研究较少。文章以此为研究对象,阐述应用M agnet软件建立二维瞬态运动场仿真模型的原理和步骤,并仿真了交流励磁机在空载工况下的磁场空间分布、电磁参数、电路参数,通过实测对比,证明了模型的实用性,该模型可指导该类型电机的结构优化设计和其它工况瞬态特性研究。

摘要：提出了一种新型直线电机,简要介绍了这种电机的基本结构及运行机理,应用magnet软件对具有不同结构的两种电机的电磁场进行了数值计算。通过计算结果进一步分析和计算得到了低速永磁直线同步电机的二维磁场分布和气隙磁密的变化波形。所做研究为新型低速永磁直线同步电动机提供了一种行之有效的设计方法。

摘要：为提供励磁同步电机的设计依据,提出了基于有限元电磁场计算软件分析其电气性能的方法。首先选取具有代表性的凸极三相4极励磁同步电机作为研究对象,构建其3D模型,设置各部分材料属性,生成线圈及设定电机初始位置,然后采取重点区域加密的自适应网格剖分方法,2D暂态求解器求解,最后采取Matlab完成数据的后处理,分析驱动电源的频率与电机转速、铜损、铁损、涡流损耗及磁场能量分布的关系,为电机设计人员提供技术支持。

摘要：基于magnet有限元分析软件,建立了磁力耦合调速器磁路机构有限元模型,对磁力耦合调速器的磁路参机构参数进行优化,对优化后的模型进行了仿真分析。基于优化参数设计制作了磁力耦合调速器样机,对样机空载和负荷运行性能验证,验证了磁路设计的合理性。研究结果表明,样机输出转矩和输出转速与仿真计算结果相符,满足设计要求,具有一定的工程应用参考价值。

摘要：变压器在当代社会生活中有着广泛的用途,最常用的是电力系统中的电力变压器,而特种变压器是指具有特殊用途的变压器,如整流变压器、电炉变压器、牵引变压器、接地变压器、电抗器、调压器等。特种变压器与电网中的电力变压器相比,结构更加复杂,设计难度更高,工艺制造水平要求更高。短路阻抗作为变压器的一项重要技术指标,在设计中是必须要保证的,而特种变压器由于其结构的复杂性,传统的设计计算方法很难保证最终的实测值与计算值相符,一般要经过多次修正后才能确定,当首次设计研发时,传统的手工计算无法保证特种变压器的短路阻抗能够一次合格。随着电磁场仿真软件的广泛应用,通过软件的准确仿真,特种变压器短路阻抗一次合格率大幅上升。本文通过使用电磁仿真软件magnet对36脉波变频调速整流变压器短路阻抗的仿真过程、仿真结果有与实测值的对比,说明magnet在特种变压器设计研发中发挥的重要作用。