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500kV SF6 电流互感器电场研究与应用
针对500kV SF6 CT 中间屏蔽出现的问题,采用有限元方法仿真了静电场分布情况,列出若干计算结果与试验对照。实验结果表明,所提方法能剔除局部放电,提高电气设备的绝缘性能。最后,把所获取的知识应用于500kV SF6 电流互感器中效果良好。...
永磁体实际形状及充磁偏差对永磁无刷电机空载反电动势的影响
本文在Ansoft Maxwell 2D v14 中建立某6p9s 永磁无刷电机不同磁钢形状及充磁偏差模型,通过仿真波形得出了不同磁钢形状及充磁偏差对电机反电动势的影响。...
一种新型电磁永磁混合悬浮系统设计及研究
基于 Ansoft Maxwell 3D 软件,研制了一种新型电磁悬浮系统装置,该装置利用电磁铁阵列与永磁铁提供空间三维方向的悬浮驱动力。与传统的电磁悬浮系统相比,该系统具有悬浮力大、磁场分布规律、运动范围广等特点,可以明显提高系统的使用效率。基于有限元数值方法对悬浮电磁力特性以及合成磁场特性进行详细分析,并做了相关实验。结果表明设计的电磁阵列悬浮系统装置可以...
Seismic Analysis Comparison between Response Spectrum and Ti
Based on ANSYS software, the response spectrum and time history analysis are both performed. And the simulation results are studied and compared accounting for the earthquake characteristics and the structure dynamic characteristics. As the results show that the earthquake response peak values and the main response frequencies are very close and comparable, it can be referred to by the engineering applications....
定子轴向通风孔对大功率机车用异步牵引电机的影响
本文以一台大功率机车用异步牵引电机为例,根据电磁理论,给出相应的求解域和数学模型,利用Ansoft Maxwell 软件,计算了牵引电机定子轴向通风孔不同孔距和孔径对电机电磁性能的影响;并对结果进行分析,得到一些有益的结论。...
Transient Analysis of a Magnetic Gear Integrated Brushless P
In this paper, a novel magnetic gear integrated brushless permanent magnet machine is studied. The main merit of the machine is that the torque produced by the stator windings can be transmitted between the low-speed rotor and the high-speed rotor through the modulation of ferromagnetic pole pieces; hence it can output a large torque at a low speed. The operating principle of the machine is discussed and its steady-state and transient performances are analyzed using circuit-field-motion coupled t...
Performance Analysis of a Novel Magnetic-geared Tubular Line
This paper presents a novel tubular linear permanent magnet motor for direct-drive applications, in which a magnetic gear is integrated with a tubular linear machine, aiming to improve the thrust force density and enhance the machine efficiency. The operating principle of the proposed machine is introduced and the motor design with improved thrust force density is presented and discussed. By using circuit-field-motion coupled time-stepping axisymmetric finite element method (FEM), the steady-stat...
Optimization of Permanent Magnet Surface Shapes of Electric
A novel algorithm which minimizes the cogging torque of surface-mounted permanent magnet (SPM) brushless motors by optimizing the surface profile of PM is presented. An efficient strategy for using finite element method (FEM) is proposed to calculate the cogging torque of PM motors with different PM shape designs. Compared with the use of general FEM, the computing time with this proposed method is significantly reduced, which is only 0.017% of that required by the former. Because of the consider...
Optimal Design of Permanent Magnet Segmentation and Conducti
Eddy-current loss in high-speed permanent magnet (PM) machines is a critical factor that could affect the machine’s efficiency or even demagnetizes the PMs because of overheating problems. Hence it is necessary and important to accurately estimate the eddycurrent loss and search for the optimal design to minimize the eddy-current loss and improve the machine’s performance. In this paper, firstly, an axial segmentation method of PMs is proposed to cut off the eddy-current axial paths. Secondly...
Investigation of Field Regulation Performance of a New Hybri
This paper presents a new topology of hybrid excitation synchronous machines (HESM) with dual-direction magnetic shunt rotor. Firstly, the configuration characteristic,basic operation principle, and equivalent magnetic circuit are introduced. Then, 3D-FEA model of the proposed HESM are established. 3D-FEA results demonstrate that the proposed HESM has wide field regulation range and fault-tolerant ability.It is an efficient topology that significantly broadens the application of HESM with magneti...
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