Results 1 to 10 of about 199 (120)
Analysis of the Influence of Common Mode Current on Wind Turbine [PDF]
, 2023 [Introduction] The objective is to solve the injury and destruction of the wind turbine equipment caused by the common mode interference current and avoid the long-term operation of the wind turbine with faults and the damage to the large components of ...
Xiaofeng WANG
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Research on Factors Influencing the Heat Dissipation Performance of Semi-Direct Drive Permanent Magnet Wind Generator [PDF]
, 2023 [Introduction] With the development of wind power generation technology, the unit capacity of permanent magnet wind generator is increasing, and the heating power is also increasing.
Desheng MIAO, Di WU, Rui SUN, Wenpeng GE
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Characteristics Analysis and Technical Prospect of Low-Frequency Main Transformer for Offshore Wind Power [PDF]
, 2023 [Introduction] Low-frequency alternating current power transmission technology has attracted wide attention. Although its theoretical research continues to go deeper, there are still many problems to be solved before its engineering implementation in ...
Jutian LI +4 more
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Research on the axial force-slip characteristics of permanent magnetic eddy current Frictional torque limiter [PDF]
, 2023 In view of the current situation of short life and poor reliability of the overload protection device of friction moment limiter in coal mine machinery, a new high-power fast breaking permanent magnet eddy current friction Moment limiter (PMEFTL) is ...
Hong ZHANG, Yuting WANG
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物理学的历史负担 = Altlasten der Physik [PDF]
, 2023 人们通常沿科学发展的路径来学习物理。这是一条曲折的路径。在这条路径中，有许多错误的概念、多余的名称和过时的方法。在这本书中，我们用了200多篇文章的篇幅逐一分析了这些错误。每篇文章都有相同的结构：1.主题，2.负担，3.历史，4.建议。这些文章已经发表在一些期刊中。因此 ...
Herrmann, Friedrich, Job, Georg
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Research progress in integrated thermal management of electric vehicles [PDF]
, 2020 Severe energy crisis and environmental pollution are the foremost problems in the world today. Electric vehicles have several advantages over traditional internal combustion engine-based vehicles, such as high energy efficiency and low emissions, which ...
Jia-lin LIANG +3 more
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Gaoya dianqi, 2021 为研究谐波电流损耗特性对特高压干式平波电抗器热效应的影响,文中分析了干式平波电抗器的损耗机理,提出了其包封绕组直流损耗、交流损耗及涡流损耗和结构件涡流损耗的计算方法。通过将电磁损耗密度添加至温度场作为热源,建立了电磁—热多物理场映射关系,较准确地模拟了对流换热过程并实现了温升计算,最后开展了干式平波电抗器温升试验。研究结果表明:采用考虑谐波损耗特性的计算方法,计算值与试验值最大误差为9.1%,平均误差为4.34%,温升分布规律吻合较好,满足工程精度要求,为工程设计人员提供了相应的理论依据。
李星汉, 李永建, 张长庚, 高冲
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, 2021 针对一种混合充磁式磁齿轮复合电机的损耗进行了研究，对比分析混合充磁式磁齿轮复合电机和径向充磁式磁齿轮复合电机的磁场和气隙磁通密度及其谐波，得到了不同转速下两种磁齿轮复合电机的铁耗和涡流损耗情况，并对调磁块形状进行了优化。结果表明，与径向充磁式磁齿轮复合电机相比，混合充磁式磁齿轮复合电机铁耗更小，产生的磁场强度更强，内层和中层气隙磁通密度更大，外层径向磁通密度和切向磁通密度的谐波幅值相对较小，有助于减少涡流损耗；优化后的圆形调磁块结构 ...
吴迪, 张芮, 张邦京, 朱姿娜
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Preparation and performance optimization of iron-based soft magnetic composites based on CaO insulating layer and FexOy transitional interlayer [PDF]
To explore the application potential of calcium oxide (CaO) as the insulating layer in soft magnetic composites, a strategy of introducing FexOy as the intermediate transition layer between the CaO insulating layer and the iron matrix was proposed to ...
HE Hao +5 more
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Gaoya dianqi, 2020 高压电力电缆设计一直是电力设计的重要内容。随着电网建设水平的提升,电缆沟涡流损耗导致电能浪费并影响电缆寿命的问题越来越突出,因此文中以降低金属顶管电缆沟涡流损耗为优化设计目标,提出了一种新型的电缆沟设计。针对三相多回路的金属顶管电缆沟,分析研究发现:影响其涡流损耗的主要因素包括电缆相位的排列方式、顶管厚度和电缆距离。通过用Ansoft Maxwell进行仿真试验,在不同的电缆相位排列、顶管厚度及电缆距离条件下,模拟顶管涡流损耗的情况,再利用有限元法对电缆沟结构进行优化计算,获得新型电缆沟设计 ...
罗旭 +4 more
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