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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, high energy density, thermal conductivity is relatively good, the power ultrasonic transducer made by it can be made very powerful, but because of this type of transducer is always in high-intensity high-frequency magnetic field work, each The loss is very serious, the heat is very large, and the giant magnetostrictive material is very sensitive to the external temperature, so the thermal analysis is an important aspect of the design of such transducers. In this paper, the transducer and its cooling system are designed. Based on the Jile-Atherton model of eddy current loss and additional loss, the model parameters are extracted and the total loss of the transducer is calculated. The finite element method Water flow distribution and temperature distribution of the transducer. The prototype was tested, and the experimental and calculated results are in good agreement.