Modeling the optimal compensation capacitance of a giant magnetostrictive ultrasonic transducer with a loosely-coupled contactless power transfer system  

作　　者：Tian LAN Ping-fa FENG Jian-jian WANG Jian-fu ZHANG Hui-lin ZHOU 

机构地区：[1]State Key Laboratory of Tribology,Department of Mechanical Engineering,Tsinghua University,Bejing 100084,China'China [2]China Ordnance Industry Navigation and Control Technology Research Institute,Beijing 10089,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2022年第10期757-770,共14页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Natural Science Foundation of China(Nos.51875311 and 52105458);the Tsinghua-Foshan Innovation Special Fund(No.2021THFS0204);the Huaneng Group Science and Technology Research Project(No.HNKJ22-U22YYJC08),China。

摘　　要：The giant magnetostrictive rotary ultrasonic processing system(GMUPS)with a loosely-coupled contactless power transfer(LCCPT)has emerged as a high-performance technique for the processing of hard and brittle materials,owing to its high power density.A capacitive compensation is required to achieve the highest energy efficiency of GMUPS to provide sufficient vibration amplitude when it works in the resonance state.In this study,an accurate model of the optimal compensation capacitance is derived from a new electromechanical equivalent circuit model of the GMUPS with LCCPT,which consists of an equivalent mechanical circuit and an electrical circuit.The phase lag angle between the mechanical and electrical circuits is established,taking into account the non-negligible loss in energy conversion of giant magnetostrictive material at ultrasonic frequency.The change of system impedance characteristics and the effectiveness of the system compensation method under load are analyzed.Both idle vibration experiments and machining tests are conducted to verify the developed model.The results show that the GMUPS with optimal compensation capacitance can achieve the maximum idle vibration amplitude and smallest cutting force.In addition,the effects of magnetic conductive material and driving voltages on the phase lag angle are also evaluated.

关 键 词：Rotary ultrasonic machining Giant magnetostrictive transducer(GMT) Loosely-coupled contactless power transfer(LCCPT) Electromechanical equivalent circuit Optimal compensation capacitance 

分 类 号：TM724[电气工程—电力系统及自动化] TB552[理学—物理]