SS型补偿无线电能传输的谐波特性研究

Harmonic Characteristic research on SS compensation Wireless Power Transfer

SS型补偿的无线电能传输系统中,由于采用全桥变换器拓扑的高频逆变,输出电流中会包含有丰富的谐波分量。目前采用的基波分析法,仅仅考虑了交流电流中的基波分量,分析结果会带来一定的误差。本文针对高频逆变输出的脉冲电压,建立SS型补偿的无线电能传输系统的耦合电路模型,给出基波与谐波下系统的输入阻抗、回路电流、传输功率和传输效率,并对补偿网络参数典型取值下进行数值计算,分析了谐波对SS型无线传输系统的传输特性的影响,结果表明,两侧回路电流有效值、传输功率和负载输出功率随谐波次数增大略有增大并趋于稳定,两侧回路电流总谐波畸变率分别为4.9%和3.6%,系统传输效率随谐波次数增大略有较小并趋于稳定。

In SS compensation Wireless Power Transfer system,the output current will contain abundant harmonic components due to the use of high frequency inverter with full bridge converter topology.At present,the fundamental wave analysis method only considers the fundamental component of ac current,and the analysis results will bring some errors.This article in view of the high frequency inverter output pulse voltage,the establishment of SS type compensation radio can coupled circuit model of transmission system,gives system under the fundamental wave and harmonic of input impedance,the current circuit,the transmission power and the transmission efficiency,combined with the typical values of system components parameters of transmission characteristics of typical numerical calculation,and analyses the influence of harmonic to SS type transmission characteristics of wireless transmission system,the influence of the results showed that on both sides of the loop current valid values,power transmission and load power increases with the increase of harmonic frequency slightly and tends to be stable,on both sides of the loop current total harmonic distortion rate are 4.9%and 3.6%respectively.The transmission efficiency of the system is slightly smaller and tends to be stable with the increase of harmonic frequency.