High-Input-Voltage High-Frequency Class E Rectifiers for Resonant Inductive Links
High-Input-Voltage High-Frequency Class E Rectifiers for Resonant Inductive Links
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DOI：
10.1109/tpel.2014.2316170
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发表时间：
2015-03
影响因子：
6.7
通讯作者：
S. Aldhaher;P. Luk;K. El Khamlichi Drissi;J. Whidborne
中科院分区：
文献类型：
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作者：
S. Aldhaher;P. Luk;K. El Khamlichi Drissi;J. Whidborne
在无线电能传输应用中，传统整流器(如半波整流器和桥式整流器)的运行效率可能很低，并且可能会减少向负载输送的功率。另一种选择是使用已知在高谐振频率和大输入电压下高效运行的E类谐振整流器。E类整流器具有近乎正弦的输入电流，可改善整体系统性能并提高效率，尤其是传输线圈驱动器。本文首次研究了E类谐振整流器在基于谐振电感耦合的无线功率传输系统中的应用。采用分段线性状态空间表示法对E类整流器进行建模，包括整流二极管的正向压降、导通电阻和谐振电感的等效串联电阻。计算了不同负载条件下的功率因数、总谐波畸变率等电能质量参数。给出了基于10W样机的大量实验结果，验证了分析的正确性和整流器的高效运行。在800 kHz的谐振频率下，获得了94.43%的工作效率。
The operation of traditional rectifiers such as half-wave and bridge rectifiers in wireless power transfer applications may be inefficient and can reduce the amount of power that is delivered to a load. An alternative is to use Class E resonant rectifiers that are known to operate efficiently at high resonant frequencies and at large input voltages. Class E rectifiers have a near sinusoidal input current which leads to an improved overall system performance and increased efficiency, especially that of the transmitting coil driver. This paper is the first to investigate the use of Class E resonant rectifiers in wireless power transfer systems based on resonant inductive coupling. A piecewise linear state-space representation is used to model the Class E rectifier including the rectifying diode's forward voltage drop, its ON resistance, and the equivalent series resistance of the resonant inductor. Power quality parameters, such as power factor and total harmonic distortion, are calculated for different loading conditions. Extensive experimental results based on a 10-W prototype are presented to confirm the performed analysis and the efficient operation of the rectifier. An impressive operating efficiency of 94.43% has been achieved at a resonant frequency of 800 kHz.