共查询到20条相似文献,搜索用时 46 毫秒
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通过对磁致伸缩力矩激励器的磁偏置和内部磁场的分析,研究了大、中、小型力矩激励器在磁偏置和内部磁路上的优点和缺点,并在此基础工了一种新型的大型力矩激励器。 相似文献
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基于磁场饱和的IPM电动机的磁路仿真 总被引:1,自引:0,他引:1
提出一种磁场饱和的IPM(Interior Permanent Magnet)电动机的磁路模型,该模型利用材料的磁化曲线为基础,考虑电枢反应磁场对永磁磁场的影响,可对电机的性能指标进行计算,便于设计变量的及时调整。仿真结果与有限元计算的结果接近,证明了该饱和磁路模型的有效性。 相似文献
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轴向磁场磁通切换型永磁(AFFSPM)电机是一种轴向长度短、转矩密度高的新型永磁电机。该电机磁场呈三维分布,与径向磁场电机不同,需要对该电机进行三维有限元分析,从而增加了电机分析和优化时的计算时间和成本。基于等效磁路法分析了AFFSPM电机的静态特性,建立了AFFSPM电机的非线性等效磁路模型,采用该模型计算、分析了气隙磁密、空载永磁磁链、反电动势和电感等特性,并与采用三维有限元方法的计算结果进行比较,验证了AFFSPM电机等效磁路模型的准确性,表明等效磁路模型适用于AFFSPM电机初始设计和分析。 相似文献
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转动式含永磁回路磁系统由于体积小、重量轻、功耗低、永磁利用率高等优点被广泛用于星箭与民用电磁继电器中。调节吸力大小,进行电磁系统优化是满足继电器产品性能指标要求的主要途径之一。目前关于含永磁回路磁系统的参数优化大多根据经验与仿真结果进行,缺乏理论依据,优化周期较长。本文从永磁回路作用的角度对含永磁回路磁系统进行分类;基于等效磁路建立含永磁回路磁系统工作气隙磁通与衔铁所受吸力矩计算模型;在此基础上,分别推导两类含永磁回路磁系统的零安匝释放、吸合位置处的吸力矩与零安匝吸力矩特性曲线过零点处的磁间隙表达式,对其特点进行分析。研究结论为继电器电磁系统的总体方案选择、参数优化设计提供理论依据与优化方向。 相似文献
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为确保乏燃料后处理厂混合澄清槽搅拌装置的永磁联轴器长期安全可靠运行,对永磁联轴器进行磁场仿真分析及结构优化设计。采用有限元方法建立三维磁场仿真模型,建模过程充分考虑联轴器的实际运行工况。首先,考察磁极对数、磁极厚度、磁场气隙、磁转角对磁转矩的影响。其次,通过温度场仿真分析考察转速对联轴器温升的影响。最后,以降低联轴器的隔离套温升为目标,对其进行结构优化设计并进行仿真分析。结果表明:优化结构的隔离套温升得到明显减小。控制联轴器温升可有效降低永磁联轴器退磁失效风险。研究成果可为同类型联轴器设计提供参考。 相似文献
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《Electric Power Systems Research》1998,45(2):141-148
This paper addresses one of the most important sources of magnetic fields: underground power cables. New design configurations for one, two, three and four cables per phase are presented from a magnetic field perspective. Different management techniques are studied in detail. Judicious placement of cable phases in multiconductor lines to reduce the field effect is implemented by computer modeling and simulations. The state-of-the-art magnetic field simulation package PCFIELD developed by EPRI is used to quantify and present the tool used to manage the field values. The new design configuration cases are very useful from a magnetic field point of view and have low cost schemes that can be easily implemented. 相似文献
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A teaching approach applied to the introductory circuit analysis course in electrical engineering is discussed. A primary feature is that all attempts to constrain student usage of simulators are rejected. The approach is implemented as a learning sequence: a presimulation thought process, then a simulation followed by a post-simulation thought process. The laboratory notebook illustrates the thought-to-paper conversion process inherent within the presimulation learning experience. Notebook scribblings, characterized by the student as a thinking schematic, are decoded by the instructor for the purpose of developing teaching materials, including new problems that cannot be immediately submitted to a simulator. The printed data produced by the simulation is processed during the post-simulation learning experience for the purpose of interpreting network behavior 相似文献
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异向旋转双机械口永磁电机磁路建模与场分析 总被引:1,自引:0,他引:1
为研究单电口输入、双机械口输出异向旋转永磁同步电机的设计方法,对定子铁心中异向旋转磁场的耦合问题进行分析.介绍该电机的特殊结构和运行原理,针对双场耦合的特点,通过引入可变径向磁阻,建立等效磁网络图并化简得到等效磁路模型,并推导了磁阻计算方法,最后利用有限元分析方法验证等效磁路模型的正确性.等效磁路模型将双耦合磁场引起的并联磁路和串联磁路共同问题简化为单一的并联磁路问题.研究结果表明:转子异向旋转对气隙磁场影响小于5%,可以降低定子轭部的平均磁密.因此,设计该类电机时可在满足机械强度的情况下,尽可能地减小定子铁心的厚度. 相似文献
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Sanghoon Shin Sridhar Kanamaluru 《Microwave Magazine, IEEE》2007,8(2):77-82
This article investigates a diplexer design technique utilizing the strengths of both EM- and circuit-based simulators to provide accurate results with reduced computation times. The EM circuit cosimulation technique effectively reduces the overall design time in passive component design, while achieving accurate results. This method can be extended to other passive component designs, such as comb-line filter and dielectric resonator filter, with a higher-order mode waveport calculation 相似文献