【摘要】：為提高超聲振動(dòng)系統(tǒng)的能量轉(zhuǎn)換效率和功率容量,提出超磁致伸縮超聲振動(dòng)系統(tǒng)的設(shè)計(jì)方法,研究導(dǎo)磁體材料特性對(duì)超聲系統(tǒng)振動(dòng)性能的影響規(guī)律。采用硅鋼、鐵氧體和磁粉心三種磁性材料設(shè)計(jì)導(dǎo)磁體,并建立超聲振動(dòng)系統(tǒng)的等效電路模型;通過阻抗分析建立3種超聲振動(dòng)系統(tǒng)的阻抗圓曲線,得到諧振頻率和機(jī)電轉(zhuǎn)換系數(shù)等參數(shù),提出導(dǎo)磁材料特性對(duì)系統(tǒng)機(jī)電能量轉(zhuǎn)換效率的影響規(guī)律。為驗(yàn)證阻抗分析結(jié)果的正確性,試驗(yàn)測(cè)定3種超聲系統(tǒng)在不同電壓幅值激勵(lì)下的振幅-電流靈敏度與頻率的關(guān)系曲線,驗(yàn)證導(dǎo)磁材料參數(shù)與系統(tǒng)機(jī)電能量轉(zhuǎn)換效率之間的關(guān)系。結(jié)果表明:高磁導(dǎo)率鐵氧體材料可提高超聲振動(dòng)系統(tǒng)在小功率工作條件下的機(jī)電能量轉(zhuǎn)換效率,而對(duì)于大功率超聲振動(dòng)系統(tǒng)而言,需要兼顧磁導(dǎo)率和飽和磁通密度,使導(dǎo)磁體工作于非磁飽和狀態(tài),以提高系統(tǒng)換能效率,這有助于指導(dǎo)不同功率大小超聲振動(dòng)系統(tǒng)的導(dǎo)磁體材料選擇。
[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.
【作者單位】： 清華大學(xué)機(jī)械工程系;清華大學(xué)精密超精密制造裝備及控制北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(51475260) 北京市自然科學(xué)基金(3141001)資助項(xiàng)目
【分類號(hào)】：TG663

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