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Conference Paper
Optimal Condition of Receiving Transducer in Wireless Power Transfer based on Ultrasonic Resonance Technology
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- Authors
- WooSub Youm, Gunn Hwang, Sung Q Lee
- Issue Date
- 2013-10
- Citation
- AES Convention 2013, pp.1-6
- Publisher
- AES
- Language
- English
- Type
- Conference Paper
- Abstract
- Recently, wireless power transfer technology draws lots of attention because of wire reduction, and charging convenience. Previous technologies such as magnetic resonance and induction coupling have drawbacks of short transfer distance and harmfulness to human health. As an alternative, ultrasonic resonance wireless power transfer technology is proposed. A pair of commercial ultrasonic transducer arrays for sensor application is used for wireless power transfer. There are two parameters that have to be decided to maximize the efficiency of power transfer. First one is load resistance that is connected to receiving transducer. It should be matched to the impedance of receiving transducer at resonance frequency. Second one is operating frequency of transmitting transducer. It should be matched to optimal frequency of receiving transducer. In this paper, this optimal load resistance and the frequency of the receiving transducer are analyzed based on circuit theory and verified through experiment.
- KSP Keywords
- Circuit theory, Induction Coupling, Magnetic resonance(MR), Operating frequency, Optimal conditions, Resonance frequency, Two parameters, Ultrasonic transducer array, efficiency of power transfer, human health, optimal frequency