| 爆炸冲击去磁脉冲发生器的磁电转换理论计算 |
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| 引用本文： | 鲁峰,陈朗,冯长根,伍俊英.爆炸冲击去磁脉冲发生器的磁电转换理论计算[J].北京理工大学学报,2015,35(S2):102-106. |
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| 作者姓名： | 鲁峰 陈朗 冯长根 伍俊英 |
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| 作者单位： | 北京理工大学机电学院, 北京 100081,北京理工大学机电学院, 北京 100081,北京理工大学机电学院, 北京 100081,北京理工大学机电学院, 北京 100081 |
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| 基金项目： | 国家自然科学基金资助项目(11072036) |
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| 摘 要： | 为提高爆炸冲击去磁脉冲发生器的输出功率及磁电转换效率,建立了发生器磁电转换过程的理论计算模型,分析了不同冲击条件及磁体性能对发生器输出功率的影响. 模型从经典电磁场理论出发,推导了感生电动势随时间变化的动态函数,获得了负载端输出电流及电压的理论计算方法. 计算表明,发生器的感生电动势大小取决于磁体内的冲击波传播速度、磁体的剩余磁感应强度、磁体的内禀矫顽力、磁体半径以及线圈匝数,磁体的长度会影响感生电动势的脉宽. 采用炸药平面波冲击加载钕铁硼永磁体的方法,进行了爆炸冲击去磁脉冲放电实验,测量了输出电压及电流曲线,计算的发生器输出电流与实验得到的结果较一致.
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| 关 键 词： | 冲击去磁 钕铁硼 感生电动势 电磁场 |
| 收稿时间： | 2015/3/20 0:00:00 |
The Theroy of Magnetoelectric Conversion in Explosive Driven Shockwave Demagnetization Generator |
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| LU Feng,CHEN Lang,FENG Chang-gen and WU Jun-ying.The Theroy of Magnetoelectric Conversion in Explosive Driven Shockwave Demagnetization Generator[J].Journal of Beijing Institute of Technology(Natural Science Edition),2015,35(S2):102-106. |
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| Authors: | LU Feng CHEN Lang FENG Chang-gen and WU Jun-ying |
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| Institution: | School of Mechanic and Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China,School of Mechanic and Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China,School of Mechanic and Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China and School of Mechanic and Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | In order to improve the performance of the explosive-driven shockwave demagnetization generator and analyze the influence ofgenerator under different impact conditions, an analytical model for the magnetoelectric conversion process in generator was developed. The model was founded based on classical electromagnetic field theory. The induced electromotive force and the load current variations with time were derived from the theoretical calculation model.The computing results show that induced EMF depends on the shockwave velocity in magnet, remanence, coercive force, magnet radius and coil turns instead of the length. However, the length of the magnet affects the impulse width of output voltage or current pulse. The shock-induced demagnetization discharge experiments were conducted by explosive planar shock wave loading Nd-Fe-B hard ferromagnetic and the output voltage and current curves were acquired. A good agreement was found between calculated and experimentally obtained output current pulse of the generators. |
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| Keywords: | shock demagnetization Nd-Fe-B induced electromotive force electromagnetic field |
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