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

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 ach...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2022-10, Vol.23 (10), p.757-770
Main Authors: Lan, Tian, Feng, Ping-fa, Wang, Jian-jian, Zhang, Jian-fu, Zhou, Hui-lin
Format: Article
Language:English
Subjects:
Amplitudes
Brittle materials
Capacitance
Circuits
Civil Engineering
Classical and Continuum Physics
Compensation
Cutting force
Energy conversion
Energy efficiency
Engineering
Equivalent circuits
Industrial Chemistry/Chemical Engineering
Machining
Magnetostriction
Mechanical Engineering
Phase lag
Power transfer
Research Article
Ultrasonic processing
Vibration
Vibration analysis
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Summary: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.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.A2200367