摘要
超磁致伸缩材料能量密度高,导热性相对较好,由其制造的功率超声换能器能做成很大功率,但因为此类换能器总处在高强度高频率磁场中工作,各种损耗很严重,带来的热量非常大,而超磁致伸缩材料对外界温度又很敏感,故热分析是该类换能器设计的重要方面。该文设计了换能器及其冷却系统,以考虑涡流损失和附加损失的Jile-Atherton模型为基础,提取了模型参数,计算得到了换能器的损耗总量;用有限元方法计算了冷却水流场分布和换能器温度场分布;对样机进行了试验,实验与计算结果吻合良好。
Giant magnetostrictive materials＇（GGM） attributes of high energy density and relatively high thermal conductivity make it possible to build large-scale high power ultrasonic transducers.However,the transducers usually work under a magnetic field of high intensity and high frequency.The heat from hysteresis loss and eddy current loss is huge.On the other hand,GGM is sensitive to temperature.Therefore heat analysis is an important part of the transducer design.A high power ultrasonic transducer and its cooling system were designed in this paper.The modified Jiles-Atherton hysteresis model which include eddy current loss and anomalous loss was used to model the behavior of GGM in a high power ultrasonic transducer.Model parameters were determined with the least square fit.Total hysteresis loss was calculated with the model.Cooling water flow and temperature distribution schemes of the transducer were obtained with finite element method.Calculation results agree well with the experimental results
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第6期116-120,共5页
Proceedings of the CSEE
基金
国家自然科学基金项目(50875177)
辽宁省教育厅重点实验室项目(2008S170)
福建省教育厅项目(A09221)
厦门市科技计划项目(3502Z20103041)~~
关键词
功率超声换能器
超磁致伸缩材料
磁滞损耗
有限元
温度分析
high power ultrasonic transducer
giant magnetostrictive materials（GGM）
hysteresis loss
finite element
temperature analysis
