共查询到20条相似文献,搜索用时 187 毫秒
1.
软磁复合材料适合用于制造结构复杂的小型永磁电机。在三维有限元分析的基础上,进行了以软磁复合材料为定子铁心的三相爪极式永磁电机的优化设计以及参数计算和性能分析;得到的结果对该种材料的应用具有一定参考价值。 相似文献
2.
软磁复合材料是由表面带有绝缘的金属粉末颗粒压制而成,具有涡流损耗小、各向同性的特点,近年来得到了一定的应用,但其磁滞损耗大,磁导率低,所以其适用场合及与硅钢片性能的具体差异还需要进一步的深入研究。该文首先利用环形试样法测试软磁复合材料的磁特性,得到其空载磁化曲线和不同频率下的损耗数据。然后,为对比分析软磁复合材料和硅钢片材料在电机应用中的差异,分别使用软磁复合材料和硅钢片设计两台永磁同步电机,分析计算两种材料电机的磁场、铁耗以及铁耗在不同频率下的变化规律。最终通过样机测试掌握了两种材料在永磁电机中应用的差异,验证了计算的准确性,总结了软磁复合材料的应用范围。 相似文献
3.
4.
5.
6.
7.
8.
《微电机》2016,(12)
以传统叠装硅钢片为初级铁心的圆筒形永磁同步直线电机存在诸多不足,因其结构复杂不易加工制造,且磁场在初级铁心轭部与硅钢片叠压方向垂直,造成涡流损耗较大。因此本文提出以一种新型的软磁复合材料(SMCs)替代传统叠装硅钢片初级铁心的圆筒形永磁同步直线电机。首先建立了基于传统叠装硅钢片和软磁复合材料两种初级铁心材料的圆筒形永磁同步直线电机的二维有限元仿真模型,对两种结构电机仿真所得到的气隙磁场和空载反电势进行对比,并对电机带额定负载的运行性能进行了分析。仿真分析结果表明,两种电机的气隙磁场和空载反电势以及电机的带负载能力基本一致,以SMCs作为铁心的新型电机性能没有降低,因此用SMCs代替硅钢片制造该电机的初级铁心是可行的。 相似文献
9.
10.
11.
YouGuang Guo Jian Guo Zhu Watterson P.A. Wei Wu 《Industry Applications, IEEE Transactions on》2003,39(6):1696-1703
This paper compares two types of three-dimensional (3-D) flux electrical machines with soft magnetic composite (SMC) cores, namely, claw-pole and transverse-flux machines. 3-D electromagnetic field analysis is conducted for the computation of some important parameters and optimization of the machine structures. An equivalent electric circuit is derived to calculate the machine performance. The analysis methods are validated by experimental results of a single-phase claw-pole permanent-magnet machine with an SMC core. Useful conclusions are drawn from the evaluation and comparison of two machines with SMC cores. 相似文献
12.
软磁复合(SMC)材料因其材料特性及微观结构特点,具有涡流损耗系数低、各向同性等优点,适用于超高速永磁同步电机(PMSM)设计,可以有效降低电机铁耗。以1台额定转速4000 r/min、额定频率533.33 Hz的PMSM为例,从电磁特性、铁耗分析计算等角度对SMC材料及硅钢片进行对比分析及有限元仿真计算,通过样机试验验证SMC材料分析结果的有效性。利用该分析方法,以1台采用SMC材料的120000 r/min的超高速PMSM为例,对比分析不同极槽配合对电磁性能的影响,对SMC材料应用于超高速PMSM提供一定的指导。 相似文献
13.
冻结磁导率先进技术及其在高性能电机研发中的应用 总被引:2,自引:0,他引:2
如何考虑磁场饱和的影响是当前电机设计中一个亟待解决的重要问题。近年来提出的冻结磁导率技术越来越多地被应用到电机负载电磁性能和参数计算中。本文详细阐述了冻结磁导率的原理及其在各种电机中的应用现状。研究表明,冻结磁导率技术可以用来精确分离各种电机负载状态下的电磁分量,如磁场、磁链、电感、转矩、转矩波动、反电势和端电压、弱磁性能以及径向力等均可以用冻结磁导率技术预测,并用来辅助电机及其驱动控制系统的设计。因此,冻结磁导率技术为高性能电机的研发提供了一个全新的方法。 相似文献
14.
钕铁硼磁体的出现是永磁领域划时代的革命,然而以指数增长的钕铁硼磁体在电机中的应用更为人们所关注。文中介绍各向同性快淬钕铁硼粉及制成的粘结磁体的性能,成型工艺,并指出各向同性粉结钕铁硼磁体在无刷电机中的广泛应用。 相似文献
15.
L. K. Kovalev K. L. Kovalev Ye. Ye. Tulinova N. S. Ivanov 《Thermal Engineering》2012,59(14):1035-1043
The analytical method of calculating two-dimensional magnetic fields in the active section of permanent-magnet synchronous electrical rotating machines, as applied to their use in the wind energy industry, has been developed. The analytical relationships for calculating distribution of two-dimensional magnetic fields and determining output parameters with due regard for geometry of the active section, the number of pairs of poles, and magnetic characteristics of materials have been obtained. The criteria dependences needed for calculating the electromotive force and main inductive reactance of permanent-magnet synchronous electric machines, with consideration for the geometry of a machine and electrophysical properties of materials being used, have been derived. The procedure of evaluating parameters of permanent-magnet synchronous generators for large-size wind power plants is presented. 相似文献
16.
冷轧硅钢取代热轧硅钢是硅钢材料发展的必然趋势,不同牌号冷轧硅钢由于磁感,铁损的差异,对电机性能的影响不尽相同,文章分析了各种牌号冷轧硅钢的性能情况,以三种典型电机为例讨论了用冷轧硅钢取代热轧硅钢片时电机设计特点和牌号的选择。 相似文献
17.
《Electrical Insulation Magazine, IEEE》2006,22(3):5-12
Due to an increasing demand for new, or the refurbishment of power stations, high-voltage rotating machines continue to play a significant role in generating electrical energy. An important component of these machines is their electrical insulation. Although much research has been done to improve the material, about a quarter of all failures still are related to insulation problems. Research to improve winding insulation is very complex because a large number of factors influence insulation life, among them the raw materials, size of the mica tapes, geometrical characteristics of the bar and taping- or manufacturing techniques. The results show that electrical tree propagation is the main electrical degradation mechanism that leads to breakdown of the main wall insulation and that poor impregnation of the insulation and type of taping can reduce time to breakdown significantly. 相似文献
18.
Metamaterials are new artificial materials with unusual electromagnetic properties that are not found in naturally occurring materials. All "natural" materials such as glass, diamond and such have positive electrical permittivity, magnetic permeability and an index of refraction. In these new artificially fabricated materials - termed as negative index materials (NIM) or double negative (ONG) media or left handed (LH) materials or backward wave (BW) media - all these material parameters are negative. With these unusual material parameters, new kinds of miniaturized antennas and microwave components/devices can be created for the wireless communications and the defense industries. The electrical permittivity and the magnetic permeability are the main determinants of a material's response to electromagnetic (EM) waves. In metamaterials, both these material parameters are negative. Correspondingly, the refractive index of the metamaterials is also negative. Another strange property of metamaterials is its reverse Doppler effect. 相似文献
19.
20.
铁氧体材料宏观电磁特性取决于材料的成分和微观结构.特定微观结构的获得取决于材料配方、制备工艺及掺杂.对于一定的基本配方,掺杂能够有效地改善材料的微观结构和电磁性能,因此,掺杂改性是铁氧体材料研究的重要内容.文章综合介绍了常见化合物、稀土氧化物和纳米氧化物等微量掺杂物的作用和对Mn-Zn功率铁氧体电磁性能的影响.根据目前的发展现状,指出了Mn-Zn功率铁氧体材料的研究方向.以期对功率铁氧体材料的微量添加研究提供有益的参考. 相似文献