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准确计算磁力齿轮电磁转矩是设计、分析磁力齿轮的关键,采用二维全局解析法计算同心式磁力齿轮气隙磁场。求解场域划分为内外转子永磁体、内外两层气隙和调磁定子的槽形区域,3类子区域的拉普拉斯方程和泊松方程通过边界连续条件建立联系。得到内外两层气隙区域的矢量磁位磁通密度解析表达式,有利于方便、快速、精确地计算任意转子位置的电磁转矩。计算了内外两层气隙磁场和内外转子电磁转矩,将气隙磁场波形和内外转子电磁转矩波形分别与二维有限元法计算波形作比较,结果吻合,证明了方法的正确性和有效性。 相似文献
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在假设磁转子的气隙远小于其轴向尺寸的情况下可忽略其边端效应,将磁力联轴器的磁场求解简化为二维平面磁场。借助ANSYS软件对磁力联轴器的磁场分布进行数值模拟,得到了不同磁转角下的磁力线分布和磁感应强度分布,并计算出对应的磁转矩,分析了内外磁体厚度、内外轭铁厚度、气隙及磁极数目对磁转矩的影响,以期对磁力联轴器的设计和应用提供有益参考。 相似文献
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针对Halbach阵列同心式磁力齿轮这种内外转子非接触传递的传动装置,运用全局解析法对磁力齿轮内外两层气隙磁场进行分析计算.求解场域划分为内外转子永磁体、内外两层气隙和调磁定子的槽形区域,各子区域的拉普拉斯方程和泊松方程通过边界连续条件建立联系.得到内外两层气隙区域的矢量磁位磁通密度解析表达式,并用计算了内外转子电磁转矩,将气隙磁场波形和内外转子电磁转矩波形分别与二维有限元法计算波形作比较,结果吻合,证明了方法的正确性和有效性. 相似文献
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采用分式线性变换法解析计算偏心式谐波磁力齿轮气隙磁场。将z平面的两个非同心圆变换成w平面的两个同心圆,给定两同心圆磁位差为1的边界条件,并求解两同心圆环形区域内的拉普拉斯方程。经反变换得到转子偏心时的气隙相对磁导函数,修正无偏心时定转子永磁产生的气隙磁场。根据叠加原理合成偏心情况下的定转子气隙磁场,从而获得气隙磁场径向和切向分量。利用麦克斯韦应力张量法计算谐波磁力齿轮的电磁转矩。通过与有限元法计算结果进行比较,验证了该文解析方法的正确性。 相似文献
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《中国电机工程学报》2016,(13)
偏心谐波磁力齿轮相比传统磁力齿轮具有高传动比下输出转矩密度大的特点,准确获得其气隙磁场分布是偏心谐波磁力齿轮设计及优化的关键。该文将分式线性变换与比磁导函数相结合,获得偏心谐波磁力齿轮气隙磁场的解析解。为克服切向磁导隐没的缺点,将极坐标系下的径向和切向比磁导计算转化为直角坐标系下的x、y方向的比磁导计算,由此修正未偏心的x、y方向的气隙磁场分量,然后根据叠加原理合成得到偏心谐波磁力齿轮气隙磁场分布。与有限元分析结果对比,解析法所得的气隙磁密、电磁转矩基本一致,验证了解析模型的有效性和合理性。 相似文献
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直驱式同心式磁力齿轮在低速大转矩领域有广泛的应用前景。为获得较正弦分布气隙磁场,所用永磁体采用Halbach阵列充磁,用二维全局解析法计算同心式磁力齿轮磁场分布;分析了调磁环铁心宽度、调磁环高度及外转子轭部厚度等参数与磁力齿轮最大静态转矩之间的关系。磁场全局解析法计算结果与有限元分析结果一致性较好,验证了解析模型的正确性;根据参数分析结果,制作了一台内转子4对极、外转子17对极的Halbach阵列同心式磁力齿轮样机,样机试验结果表明,合理选择结构参数可以提高磁力齿轮的转矩密度,对磁力齿轮的设计提供一种有益参考。 相似文献
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为研究轴向磁化多环磁力联轴器的结构参数对磁转矩的影响,采用有限元方法对其三维磁场进行数值计算,得出了轴向磁化多环磁力联轴器的三维磁场分布。分析了主动转子转角、气隙厚度、永磁体厚度和磁极对数对磁转矩的影响,即以一对磁极转角为周期,磁转矩与转角成类似正弦曲线关系变化,且在360°/2p时磁转矩存在最大值;随着气隙厚度的增加,联轴器的磁转矩降低;增大永磁体厚度,可提高磁转矩,但当永磁体厚度增大到一定程度后,磁转矩曲线的斜率逐渐变小,增加变慢;在一定范围内,增加联轴器的磁极对数,磁转矩增大,但磁极对数增加到一定数目后,随着磁极对数的继续增加,磁转矩降低。其分析结果可对该类磁力联轴器性能分析和设计起指导作用。 相似文献
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采用二维全局解析法计算Halbach阵列同心式磁力齿轮气隙磁场。求解场域划分为内外转子永磁体、内外两层气隙和调磁定子的槽形区域,3类子区域的拉普拉斯方程和泊松方程通过边界连续条件建立联系。得到内外两层气隙区域的矢量磁位磁通密度解析表达式,有利于方便、快速、精确地计算任意转子位置的电磁转矩。气隙磁场波形与二维有限元法计算波形较吻合。与径向充磁相比,Halbach阵列充磁方式所得转矩更大,且更接近正弦。运用 Matlab 优化工具箱中的遗传算法对 Halbach 阵列同心式磁力齿轮某些参数进行优化,试验结果表明计算值与测量值较为一致,证明了所提方法的正确性和有效性。 相似文献
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Ana Maria Rocha Margarida Faco Joo Pedro Sousa Antnio Viegas 《International Journal of Numerical Modelling》2008,21(6):507-513
The optimum door seal configuration to prevent radiation leakage from a microwave oven is still a manufacturing concern. Here, we propose a numerical algorithm to simulate the radiation propagation along a door seal structure using the finite‐difference time domain method, which is used for a priori shielding efficiency tests. The results agree with experimental data. The critical dimensions of the choke structure were found and high shielding is anticipated for a simpler choke structure. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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I. M. Kirpichnikova A. S. Mart’yanov E. V. Solomin 《Russian Electrical Engineering》2013,84(10):577-580
Analysis of excitation systems of generators for wind-power units is carried out, a software package for generator simulation is presented, and the sequence of the generator design is presented. 相似文献
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Matsuo H. Yamashita T. Fujishima T. 《Dielectrics and Electrical Insulation, IEEE Transactions on》2006,13(2):408-414
To develop a propagation model of a local discharge on a wet polluted insulator, the authors have examined characteristics of the local discharge on an electrolytic solution simulating the wet polluted insulator surface. The local discharge was propagated on the solution under the impulse voltage. A shape of a contacting surface between the local discharge and the solution has been already obtained by the authors. By using the contacting surface, an electric potential near a tip of the local discharge on a conductive film of 1 mm in thickness was calculated. Furthermore, the potential was measured with a probe. The calculated values and the measured values of the electric potential agreed well regardless of the propagation length of the local discharge, the width of the conductive film, the resistivity of the conductive film, the peak value of the applied voltage and the applied voltage waveform. 相似文献
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文中分析飞机座舱空气调节系统的功能,研制以单片机为核心的检查仪,实现对飞机空调系统工作性能的检测.实际应用表明,该检测设备性能稳定、操作便捷、可靠性高,提高了维修工作的质量和效率,而且该设备对于相关机型具有一定的通用性. 相似文献
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Innovations in critical technology for the production of magnetic materials is considered. On the basis of these innovations, a new design of a low-power transformer is proposed. The operating characteristics of transformers of the pilot and analog design are studied. 相似文献
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Diaz J. Martin-Ramos J.A. Prieto M.J. Fernandez Linera F.M. Nuno F. 《Industry Applications, IEEE Transactions on》2002,38(5):1226-1231
The development of an automatic deceleration system for a winding machine in a siderurgy factory is presented in this paper. The proposed system controls the speed of a winding machine in order to obtain the optimum stop point in terms of security and fast production. The system is based on a microcontroller and an extremely simple hardware. The system has been tested for two years and results evince a very good mean time between failures. 相似文献
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该文通过对华能大连电厂一次母线故障时BUS1 0 0 0母线保护动作情况的分析 ,找出了BUS1 0 0 0母线保护不正确动作的原因 ,总结了事故教训 ,并提出了改进措施 相似文献
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This paper describes a control method for a tripedal robot which walks with a shuffle. The robot consists of three electromagnets and three piezoelectric elements. The electromagnet supports the robot as a leg. Two of the three electromagnets adhere to a magnetic floor and the other electromagnet is moved by the deformation of the piezos. The relation between the control waveforms and the robot motion is described theoretically. The theoretical displacement of the robot is calculated. The piezo deformations which move the robot to the destination are obtained. The control waveform is determined by the piezo deformations. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 177(4): 33–41, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21192 相似文献