超磁致伸缩超声振动系统的机电转换效率研究
发布时间：2018-07-17 14:51
【摘要】：为提高超声振动系统的能量转换效率和功率容量,提出超磁致伸缩超声振动系统的设计方法,研究导磁体材料特性对超声系统振动性能的影响规律。采用硅钢、铁氧体和磁粉心三种磁性材料设计导磁体,并建立超声振动系统的等效电路模型;通过阻抗分析建立3种超声振动系统的阻抗圆曲线,得到谐振频率和机电转换系数等参数,提出导磁材料特性对系统机电能量转换效率的影响规律。为验证阻抗分析结果的正确性,试验测定3种超声系统在不同电压幅值激励下的振幅-电流灵敏度与频率的关系曲线,验证导磁材料参数与系统机电能量转换效率之间的关系。结果表明:高磁导率铁氧体材料可提高超声振动系统在小功率工作条件下的机电能量转换效率,而对于大功率超声振动系统而言,需要兼顾磁导率和饱和磁通密度,使导磁体工作于非磁饱和状态,以提高系统换能效率,这有助于指导不同功率大小超声振动系统的导磁体材料选择。
[Abstract]:In order to improve the energy conversion efficiency and power capacity of ultrasonic vibration system, a design method of giant magnetostrictive ultrasonic vibration system is proposed. Three kinds of magnetic materials, silicon steel, ferrite and magnetic powder core, are used to design magnetic conductors, and the equivalent circuit model of ultrasonic vibration system is established, and the impedance circle curves of three kinds of ultrasonic vibration systems are established by impedance analysis. The parameters such as resonant frequency and electromechanical conversion coefficient are obtained, and the influence of magnetic material characteristics on the electromechanical energy conversion efficiency of the system is presented. In order to verify the correctness of impedance analysis results, the relationship curves between amplitude-current sensitivity and frequency of three ultrasonic systems excited by different voltage amplitudes were measured, and the relationship between the parameters of magnetic conductivity and the electromechanical energy conversion efficiency of the system was verified. The results show that the high permeability ferrite material can improve the efficiency of electromechanical energy conversion in ultrasonic vibration system under the condition of low power operation, but for the high power ultrasonic vibration system, both permeability and saturation flux density should be taken into account. In order to improve the energy transfer efficiency of the system, the magnetic conductors work in the state of non-magnetic saturation, which is helpful to guide the selection of magnetic conductors for ultrasonic vibration systems with different power levels.
【作者单位】： 清华大学机械工程系;清华大学精密超精密制造装备及控制北京市重点实验室;
【基金】：国家自然科学基金(51475260) 北京市自然科学基金(3141001)资助项目
【分类号】：TG663
本文编号：2129991
[Abstract]:In order to improve the energy conversion efficiency and power capacity of ultrasonic vibration system, a design method of giant magnetostrictive ultrasonic vibration system is proposed. Three kinds of magnetic materials, silicon steel, ferrite and magnetic powder core, are used to design magnetic conductors, and the equivalent circuit model of ultrasonic vibration system is established, and the impedance circle curves of three kinds of ultrasonic vibration systems are established by impedance analysis. The parameters such as resonant frequency and electromechanical conversion coefficient are obtained, and the influence of magnetic material characteristics on the electromechanical energy conversion efficiency of the system is presented. In order to verify the correctness of impedance analysis results, the relationship curves between amplitude-current sensitivity and frequency of three ultrasonic systems excited by different voltage amplitudes were measured, and the relationship between the parameters of magnetic conductivity and the electromechanical energy conversion efficiency of the system was verified. The results show that the high permeability ferrite material can improve the efficiency of electromechanical energy conversion in ultrasonic vibration system under the condition of low power operation, but for the high power ultrasonic vibration system, both permeability and saturation flux density should be taken into account. In order to improve the energy transfer efficiency of the system, the magnetic conductors work in the state of non-magnetic saturation, which is helpful to guide the selection of magnetic conductors for ultrasonic vibration systems with different power levels.
【作者单位】： 清华大学机械工程系;清华大学精密超精密制造装备及控制北京市重点实验室;
【基金】：国家自然科学基金(51475260) 北京市自然科学基金(3141001)资助项目
【分类号】：TG663
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