Circuit compensation for efficient contactless power transmission in ultrasonic vibration systems

SHEN Hao; FENG Pingfa; ZHANG Jianfu; YU Dingwen; WU Zhijun

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (7) : 728-733.

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Circuit compensation for efficient contactless power transmission in ultrasonic vibration systems

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Abstract

Circuit compensation was used to improve the contactless power transmission efficiency in ultrasonic vibration systems. The circuit compensation model was based on an equivalent circuit model of the piezoelectric vibrator and a mutual inductance model of the loosely coupled system. The primary and secondary circuits were independently compensated to eliminate the effects of the mutual inductance. A system was built with test showing that the amplitudes were significantly improved by the compensation, especially for large air gaps and large power loads. This study indicates that circuit compensation effectively reduces the reactive power losses and improves the power transmission efficiency of the contactless power transmission in ultrasonic vibration systems.

Key words

ultrasonic vibration system / contactless power transmission / mutual inductance model / equivalent circuit / circuit compensation / ultrasonic amplitude

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SHEN Hao, FENG Pingfa, ZHANG Jianfu, YU Dingwen, WU Zhijun. Circuit compensation for efficient contactless power transmission in ultrasonic vibration systems[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(7): 728-733

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