Analysis and Control of Series/Series-Parallel Compensated Resonant Converter for Contactless Power Transfer
Analysis and Control of Series/Series-Parallel Compensated Resonant Converter for Contactless Power Transfer
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DOI：
10.1109/jestpe.2014.2336811
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发表时间：
2015-03
影响因子：
5.5
通讯作者：
J. Hou;Qianhong Chen;Siu‐Chung Wong;C. Tse;X. Ruan
中科院分区：
文献类型：
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作者：
J. Hou;Qianhong Chen;Siu‐Chung Wong;C. Tse;X. Ruan
串/串(S/S)和串/并联(S/P)补偿广泛应用于非接触式电能传输系统。然而，工作在输出电压增益交点的S/S补偿变流器的电感输入阻抗影响了系统的效率，而工作在谐振频率下的S/P补偿变流器的输出电压对气隙变化或失调引起的变压器参数的变化非常敏感。本文提出了一种新颖的串/串-并(S/SP)补偿拓扑，以实现高效率和良好的输出可控性。本文对所提出的谐振转换器进行了频域和时间域分析。与传统的谐振变流器类似，它既可以采用锁相环控制，也可以采用固定频率控制。搭建了60W锁相控制样机和1.5kW定频控制样机，验证了理论分析的正确性。为了进行输入输出电压增益比较，还制作了S/P补偿转换器。实验结果验证了该补偿方法的有效性。制作的S/SP样机在输出功率为1.5kW、绕组间有10 cm气隙的情况下，效率达到95.2%。
Series/series (S/S) and series/parallel (S/P) compensations are widely used in contactless power transfer systems. However, the inductive input impedance of the S/S compensated converter operating at an output voltage gain intersection point impairs the system's efficiency, and the output voltage of the S/P compensated converter operating at resonant frequency is quite sensitive to variation of transformer's parameters caused by air gap change or misalignment. This paper proposes a novel series/series-parallel (S/SP) compensation topology to achieve both high efficiency and good output controllability. The frequency-domain and time-domain analyses of the proposed resonant converter are performed in this paper. Similar to the conventional resonant converters, both phase-locked-loop (PLL) control and fixed-frequency control can be employed. A 60-W prototype with PLL control and a 1.5-kW prototype with fixed-frequency control are built to verify the theoretical analysis. To perform the input-to-output voltage gain comparison, an S/P compensated converter is also fabricated. Experimental results verify the effectiveness of the proposed compensation method. The efficiency of the fabricated S/SP prototype reaches 95.2% at an output power of 1.5 kW with a 10-cm air gap between windings.