Optimal Design of Electromagnetic Acoustic Transducer

作     者：Eiji Matsumoto Shinji Kitamura Jun Abe 

作者机构：Department of Energy Conversion Science Kyoto University Kyoto 606-8501 Japan Kyoto Research ＆ Development Center Mitsubishi Motors Corporation Kyoto 616-8501 Japan Energy Technology Laboratories Osaka Gas Osaka 554-0051 Japan 

出 版 物：《Journal of Energy and Power Engineering》 (能源与动力工程（美国大卫英文）)

年 卷 期：2012年第6卷第4期

页      面：561-569页

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：电磁声换能器 优化设计 永久磁铁 电磁超声 超声波发射 模拟设计 洛仑兹力 静态磁场 

摘      要：This paper considers the design of EMAT (Electro-Magnetic Acoustic Transducer) based on numerical simulation. The EMAT consists of an exiting coil and two permanent magnets, which transmits the ultrasonic wave by the Lorentz force between the eddy current and the static magnetic field by the magnets. From the experimental result on self-prepared EMATs, the intensity and the directivity of the transmitted wave depend on the widths of the coil and the magnets. By means of EEM analysis the authors attempt to determine the optimal values of the above widths such that both the intensity and the directivity achieve the maximum or allowable performance.