| 王一凡,贺西平.超磁致伸缩换能器设计和实验*[J].,2025,44(4):842-849 |
| 超磁致伸缩换能器设计和实验* |
| Design and experiment of giant magnetostrictive transducer |
| 投稿时间：2024-01-28 修订日期：2024-07-13 |
| 中文摘要: |
| 设计了一款窗型(双棒)和一款单棒结构频率为20 kHz的超磁致伸缩换能器，以输出振幅大、稀土棒内磁场均匀、棒受到应力小为优化目标对换能器的磁路进行了优化设计，并仿真计算了换能器的振动及声性能参数，如振型、输出振幅、阻抗圆和工作一定时间的温升。结果表明，窗型和单棒换能器稀土棒轴向磁场均匀度分别为92.31%和86.52%；1 A激励电流窗型换能器的输出振幅为6.3 ?m，单棒换能器为5.0 ?m；1 A激励电流窗型换能器工作15分钟 min温度升高了47.8 ℃，单棒换能器相同电流、相同工作时间温度升高了57.8 ℃。对试制的两款换能器测试，表明，窗型和单棒换能器的重质量分别为2274 g和2166 g，长、宽分别为134 mm?、124 mm和134 mm?、90 mm；相同激励电流下窗型换能器的输出振幅是单棒换能器的1.4倍，工作相同时间窗型换能器温升比单棒换能器低6 ℃；窗型换能器的电声效率为67.88%，单棒换能器为65.2%。 更大的输出位移提高了工作效率、拓宽了换能器的应用领域；更低的温升可以延长换能器的使用寿命、提高工作稳定性；更高的电声效率有利于实现节能降耗和提升经济效益的目标。这为实际应用时的选择提供了参考。 |
| 英文摘要: |
| Designed a window-type ( double-rod ) and a single-rod giant magnetostrictive transducer with a frequency of 20 kHz. The magnetic field distribution in the rare earth rod, the vibration mode of the transducer, the output amplitude, the impedance circle and the temperature rise were calculated by the finite element method. The magnetic circuit of the transducer is optimized with the optimization objectives of large output amplitude, uniform magnetic field in the rare earth rod, and small stress on the rod. The vibration and acoustic performance parameters of the transducer are simulated and calculated, such as vibration mode, output amplitude, impedance circle and temperature rise of a certain time. The simulation results show that the axial magnetic field uniformity of the rare earth rod of the window type and the single rod transducer is 92.31 % and 86.52 % respectively. The output amplitude of the 1 A excitation current window transducer is 6.3 ?m, and the single rod transducer is 5.0 ?m. The temperature of the 1 A excitation current window transducer increased by 47.8 °C for 15 minutes, and the temperature of the single rod transducer increased by 57.8 °C at the same current and the same working time. The test results of the two transducers show that the weightmass of the window type and the single rod transducer is 2274 g and 2166 g respectively, and the length and width are 134124 mm and 13490 mm r espectively. Under the same excitation current, the output amplitude of the window transducer is 1.4 times that of the single rod transducer, and the temperature rise of the window transducer is 6 °C lower than that of the single rod transducer at the same time. The electro-acoustic efficiency of the window transducer is 67.88 %, and that of the single-rod transducer is 65.2 %. Larger output displacement enhances work efficiency and expands the application fields of the transducer. Lower temperature rise can prolong the service life of the transducer and improve operational stability. Higher electro-acoustic efficiency facilitates energy conservation and consumption reduction, as well as promotes economic benefits. These advantages provide valuable references for practical application choices. |
| DOI：10.11684/j.issn.1000-310X.2025.04.004 |
| 中文关键词: 超磁致伸缩换能器 仿真计算 窗型结构 阻抗圆 |
| 英文关键词: Giant magnetostrictive transducer Simulation calculation Window structure Impedance circle |
| 基金项目:国家自然科学基金(12174241) |
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