Noise Reduction of a Three-Phase Reactor by Optimization of Gaps Between Cores Considering Electromagnetism and Magnetostriction
Noise Reduction of a Three-Phase Reactor by Optimization of Gaps Between Cores Considering Electromagnetism and Magnetostriction
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DOI：
10.1109/tmag.2011.2154378
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发表时间：
2011-09
影响因子：
2.1
通讯作者：
Yanhui Gao;M. Nagata;K. Muramatsu;K. Fujiwara;Y. Ishihara;S. Fukuchi
中科院分区：
文献类型：
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作者：
Yanhui Gao;M. Nagata;K. Muramatsu;K. Fujiwara;Y. Ishihara;S. Fukuchi
为了降低与逆变电源连接的电抗器的噪声，我们已经提出了一种改进的单相电抗器，该电抗器采用三维耦合磁场和考虑电磁和磁致伸缩的振动分析，在铁心之间的间隙中选择硬材料作为绝缘体，并在轭上增加间隙。实验证明了该方法的有效性。本文对该设计方法进行了改进，并应用于三相电抗器。首先，提出了确定间隙绝缘子最优硬度的方法，使电磁位移和磁致伸缩位移相互抵消。在这种方法中，间隙的最佳硬度可以用一个简单的方程来表示，这个方程包含铁芯和间隙的长度，以及一个与磁致伸缩有关的参数。此外，还提出了在不改变三相电抗器的平衡和磁阻的情况下，在轭中增加间隙的方法。结果表明，在考虑电磁、磁致伸缩和铁芯层状结构的三维耦合磁场和力学分析下，采用该方法改进的电抗器的位移可减少到普通电抗器的1/25。
To reduce the noise of a reactor connected to an inverter power supply, we have already proposed an improved one-phase reactor, in which the hard materials are chosen as the insulators inserted in the gaps between the cores, and gaps are added in the yokes, using a three-dimensional (3-D) coupled magnetic field and vibration analyses taking account of both the electromagnetism and magnetostriction. The effectiveness was shown by experiment. In this paper, the design method is improved and applied to a three-phase reactor. First, the method of determining the optimal hardness of insulators inserted in gaps, so that both the displacements by electromagnetism and magnetostriction are canceled with each other, is proposed. In this method, the optimal hardness of gaps can be represented using a simple equation involving the lengths of the iron cores and the gaps, and a parameter concerned with magnetostriction. Moreover, the method of adding gaps in the yokes without changing the balance and reluctance of a three-phase reactor is also proposed. It is shown that the displacements of the reactor improved by using the proposed methods can be reduced to be 1/25 of the ordinary reactor in the 3-D coupled magnetic field and mechanical analyses taking account of both the electromagnetism and magnetostriction and laminated structure of the iron cores.