实验和数值调查自加热对通过金属超声波功率传输效率的影响
Allen Zhou1, Prabhakaran Manogharan1, Kevin Dix1
1G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
Ultrasonics
|June 11, 2025
概括
超声波功率传输 (UPT) 系统可以通过金属无线供电设备. 这项研究表明,温度上升显著降低了UPT的效率,机械损失是主要的热源.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 物理 物理学 物理
背景情况:
- 超声波功率传输 (UPT) 能够在密封的金属外内向电子设备无线输送能量.
- 这项技术对于需要完整的金属屏障的应用至关重要,避免充电或更换电池的穿孔.
- 了解效率损失,特别是自我加热,对于优化UPT系统性能至关重要.
研究的目的:
- 为了研究温度对金属超声波传输系统功率效率的影响.
- 确定UPT系统中热量产生的主要来源.
- 为改善UPT系统设计和热管理提供见解.
主要方法:
- 在连续超声波传感器驱动下测量功率传输效率和温度的实验设置.
- 多物理有限元模拟 (电机热合) 模拟UPT系统的温度配置.
- 作为温度升高的函数,效率下降的量化.
主要成果:
- 连续驱动的UPT系统的功率传输效率随着时间的推移随着温度的增加而下降.
- 数字模拟表明,机械损失是UPT系统中自热产生的主要原因.
- 确立了温度升高和UPT效率降低之间的明显相关性.
结论:
- 温度显著降低了超声波功率传输系统的效率.
- 机械损失是UPT系统自热的主要因素,需要考虑设计来减轻这一点.
- 这些发现为优化UPT系统设计提供了关键数据,以提高性能和寿命.
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