Compensation Modeling and Optimization on Contactless Rotary Transformer in Rotary Ultrasonic Machining

超声波加工 超声波传感器 声学 传感器 电阻抗 变压器 工程类 电气工程 输入阻抗 电容器 电压 电子工程 物理
作者
Jianguo Zhang,Zhili Long,Can Wang,Heng Zhao,Yangmin Li
出处
期刊:Journal of Manufacturing Science and Engineering-transactions of The Asme [ASM International]
卷期号:142 (10) 被引量:10
标识
DOI:10.1115/1.4047139
摘要

Abstract Rotary ultrasonic machining (RUM) is an effective solution to cut, grind, or drill the advanced brittle hard materials. Contactless rotary transformer, with the advantages of high-power transmission efficiency and reliability, is a potential structure to transmit electric power in RUM. In this study, an impedance model of rotary ultrasonic holder (RUH) is established to find that there exist deviations for the resonant frequency and impedance between the RUH and the ultrasonic transducer, indicating that without compensation the ultrasonic transducer cannot find precisely its own resonant frequency by sweeping frequency. To match the resonant frequency and impedance, four compensation topologies are compared and the Series-Series (SS) topology is discovered as the most suitable option. The compensated capacitance values are determined by visualized solution from the contour line method. Both simulation (from matlab–simulink) and experimental results validate that with compensation elements, the resonant frequency and impedance can be matched precisely between the RUH and ultrasonic transducer and the output voltage and current are with better dynamic performance. Moreover, with the same input voltage, the received power of ultrasonic transducer with compensation capacitors is 7.4 times than the one without compensation. Results verify that the compensation optimization of contactless rotary transformer can improve the vibration amplitude in RUM.

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