中国电机工程学报Issue(17)：4461-4467,7.DOI:10.13334/j.0258-8013.pcsee.2015.17.022
海下超声耦合无线电能传输系统电学阻抗变换技术
Electrical Impedance Transformation Techniques for an Ultrasonic Coupling Wireless Power Transfer System Under Sea Water
摘要
Abstract
Piezoelectric transducers are common devices for electricity-sound conversion and sound-electricity conversion. Electrical impedance transformation methods for the transmitting transducer and the receiving transducer were respectively studied, according to the electrical impedance characteristic that the piezoelectric transducer is capacitive when it works under the resonant state. On the transmitting side, electrical impedance transformation was aimed at eliminating capacitive reactive power in order to reduce the burden of the power source and providing active power for emitting ultrasonic waves as required, while on the receiving side, eliminating the capacitive imaginary part and decreasing the real part of the equivalent output impedance were mainly considered, with the purpose of getting relatively stable output voltage when the load resistance changed. Structures of the LC impedance transformation network and calculating methods of the parameters were presented in order to achieve these purposes. To examine the effects, an experimental setup of wireless power transfer system under water was established. Nature seawater was used as the ultrasound medium and piezoelectric ultrasonic transducers were used as devices for electricity-sound and sound-electricity conversions. The experimental results verify the efficiency of the proposed impedance transformation techniques.关键词
无线电能传输/海水/超声波/压电换能器/阻抗变换Key words
wireless power transfer (WPT)/seawater/ultrasound/piezoelectric transducer/impedance transformation分类
信息技术与安全科学引用本文复制引用
许康,陈希有,刘丹宁..海下超声耦合无线电能传输系统电学阻抗变换技术[J].中国电机工程学报,2015,(17):4461-4467,7.基金项目
国家自然科学基金项目(61371026)。Project Supported by National Natural Science Foundation of China (61371026) （61371026）
