Analysis of magnetic field and force for magnetic fluid sinusoidal micro pressure signal source

被引：0
作者：
Yang W. [1 ,2 ]
Zhai Y. [1 ,2 ]
Chen J. [1 ,2 ]
Yang X. [1 ,2 ]
Yang Q. [1 ,2 ]
机构：
[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin
[2] Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2018年 / 39卷 / 12期
关键词：
Finite element simulation; Magnetic field calculation; Magnetic fluid; The first-order buoyancy;
D O I：
10.19650/j.cnki.cjsi.J1803762
中图分类号：
学科分类号：
摘要：
Current sinusoidal pressure signal sources need mechanical excitation vibration source and output high frequency pressure signal, in which the mechanical control is difficult. Thus, a low frequency sinusoidal micro pressure signal source based on magnetic fluid is designed. By applying a sinusoidal exciting current to the solenoid coil, magnetic fluid that is subjected to the magnetic force generates alternating magnetic buoyancy and outputs low frequency sinusoidal micro pressure signal. The parameters of solenoid coil are optimized to obtain a more uniform gradient magnetic field. The relationship between the output sinusoidal micro pressure signal within a certain range and amplitude and frequency of the input current is calculated, the influencing factors are briefly analyzed as well. The distribution of magnetic field and magnetic force in the magnetic fluid are calculated by finite element simulation method, and the experimental platform is set up. Experimental results show that the output pressure signal waveform of that pressure signal source is relatively stable in range of 0~2 Hz excitation frequency of the power source, and the output low frequency sinusoidal micro pressure signal is controlled by adjusting amplitude and frequency of the input current. © 2018, Science Press. All right reserved.
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页码：92 / 99
页数：7
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