Abstract：Aiming at vibration problems of a voltage transformer used in metro auxiliary converter, its modal and vibration measurements were conducted.Based on test conditions and the model updating method, a multi-physical field coupled analysis model including electromagnetic field, electromagnetic excitation and vibration response of the transformer was established.The transformer’s electromagnetic force produced due to magneto-striction and its electromagnetic vibration characteristics were calculated and analyzed.The results showed that considering 3-phase asymmetric harmonic current of the actual current source, the magnetic flux density of the iron core contains richer 3, 5, 7, 9 and 11 order harmonic components to cause a stronger harmonic vibration of the iron core.Furthermore, the transformer vibration reduction scheme was proposed.Finally, the simulation calculation verified the rationality of the proposed method.It was shown that the proposed method has a certain engineering application value.
丁杰1,2，张平1，尚敬2，刘海涛2，李华2. 地铁辅助变流器用变压器电磁振动计算与减振分析[J]. 振动与冲击, 2019, 38(3): 59-66.
DING Jie 1,2 ZGHANG Ping1 SHANG Jing 2 LIU Haitao 2 LI Hua 2 . Calculation and vibration reduction for electromagnetic vibration of a voltage transformer used in metro auxiliary converter. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(3): 59-66.
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