矢量磁路理论及应用初探
首发时间:2023-10-31
摘要:磁路理论是电机、变压器等电磁设备的关键理论,为解决复杂电磁问题和优化电机等电磁设备性能提供了不可或缺的工具。本文首先追溯了磁路理论的发展历程,介绍了前人为完善磁路理论所做的有益探索,剖析了它们的局限性和在实际应用中所面临的挑战。在此基础上,本文首次从最基本的物理属性出发定义了磁感和磁容,建立了包括磁阻、磁感和磁容三个核心磁路元件/参数的矢量磁路理论,系统完整地表征了磁路中磁阻、涡流和磁滞三个基本属性,揭示了虚拟磁功率与电功率之间的内在联系,提出了磁电功率定律,并与其他磁路理论、建模方法进行了比较和分析,总结了它们之间的联系和区别。为了展示矢量磁路理论在科学与工程领域的价值,呈现了四个实际应用案例。最后,对矢量磁路理论的特点进行了总结,并对未来研究方向进行了展望。
关键词: 矢量磁路理论;磁路元件 磁感 磁容 磁电功率定律 电机设计 损耗计算 磁性材料
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Vector Magnetic Circuit Theory and Its Preliminary Applications
Abstract:The magnetic circuit theory stands as a pivotal theory for electromagnetic devices like electrical machines and transformers, furnishing indispensable tools for addressing intricate electromagnetic challenges and optimizing the performance of electromagnetic apparatus. In this paper, the historical development of magnetic circuit theory is first traced, providing insights into the valuable contributions made by earlier researchers towards refining magnetic circuit theories, including magnetic circuit parameters and their respective theoretical development. Additionally, their limitations and the challenges they encounter in practical applications are analyzed. On this basis, this paper pioneers the definition of magductance and magnetic-capacitance from the fundamental physical properties, establishes the vector magnetic circuit theory encompassing three core components (reluctance, magductance, and magnetic-capacitance), systematically and completely characterizes the three basic properties of reluctance, eddy current and hysteresis in the magnetic circuit, reveals the intrinsic connection between the virtual magnetic power and the electric power, and puts forward the magnetoelectric power law.And an exhaustive comparative analysis with other magnetic circuit theories or modeling methods is conducted to illustrate their interconnections and differences. In order to show the applicative value of the vector magnetic circuit theory in science and engineering, four practical application scenarios are presented. Finally, the unique features of the proposed vector magnetic circuit theory are highlighted and the future research directions are prospected.
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