Research on Dynamic Vibration of Transformer With Wireless Power Transfer System Load
Research on Dynamic Vibration of Transformer With Wireless Power Transfer System Load
复制标题
DOI：
10.1109/tmag.2015.2454298
复制
发表时间：
2015-07
影响因子：
2.1
通讯作者：
Lihua Zhu;Qingxin Yang;R. Yan;Xian Zhang;Yimei Yang
中科院分区：
文献类型：
--
作者：
Lihua Zhu;Qingxin Yang;R. Yan;Xian Zhang;Yimei Yang
变压器的总噪声水平主要受负载电流中谐波的影响。其原因是谐波与工频大负载电流的相互作用以及声辐射效率随频率的增加而增加。指出负荷谐波运行下的动态振动特性对降低设备噪声具有重要意义。本文主要研究了三相三桥臂Transformer在无线电能传输系统中的负载振动噪声效应，即负载电流中会产生谐波。加速度传感器布置在Transformer的芯和绕组的表面上。然后，在WPT系统的功率从0到20 kW的情况下，测量了Transformer的不同位置的振动。通过对采集信号的快速傅里叶变换分析，得到了振动的频谱分布。有无PWT负载的实验结果表明，负载电流中的谐波对振动噪声有很大的影响。得出了降低振动噪声水平应消除负载电流的几个主要谐波的结论。
The total noise level of transformers is mainly influenced by harmonics in load current. The reasons are the interaction of harmonics with large load current at power frequency and the rising sound radiation efficiency with frequency. It is noted that the dynamic vibration behaviors under load harmonics operation are important to decrease the equipment noise. This paper mainly studies the vibration noise effects of three-phase three-leg transformer with the load of wireless power transfer (WPT) system, which would bring harmonics in the load current. Accelerometer sensors were arranged on the surface of the cores and windings of the transformer. Then, the vibration was measured in different positions of a transformer under the power of WPT system from 0 to 20 kW. The spectral distribution of vibration was obtained through the fast-Fourier transform analysis of the acquisition signals. The experimental results with and without PWT load imply that the harmonics in load-current have great effect on the vibration noise. It is to conclude that the main several harmonics of load current should be eliminated to reduce the vibration noise level.