SiC双全桥无线电能传输系统恒功率传输效率优化研究
Optimization of constant power transmission efficiency for wireless power transfer system with SiC dual full bridges
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摘要: 针对不同负载下无线电能传输系统保持恒功率电能传输时的传输效率变化问题,通过建立SiC双全桥结构无线电能传输系统模型,推导出原边电压导通角与系统传输功率、副边电压导通角与传输效率的对应关系,进而研究恒功率传输效率优化问题.结果表明,通过调节副边电压导通角使等效负载为最优值,可在变负载情况下使传输效率最大.双全桥结构和副边不控桥结构的对比实验验证了该双全桥结构可显著提升能量传输效率,当负载为30 Ω,传输功率为100 W时,效率提升19%.
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关键词:
- SiC双全桥无线电能传输 /
- 传输功率调节 /
- 效率优化
Abstract: Aiming at the problem of transmission efficiency change in the wireless power transfer system constant power transmission under different loads, by establishing the SiC dual full bridge wireless power transfer system model, the corresponding relationships between the primary side voltage angle and the transmission power, the secondary side voltage angle and the transmission efficiency were deduced, and the optimization of the constant power transmission efficiency was studied.The results showed that under the condition of variable load, the equivalent load was optimized by adjusting the secondary side voltage angle to maximize the transmission efficiency. The experimental comparison between the dual full bridge structure and the uncontrolled rectifier structure proved that the dual full bridge structure could significantly improve the transmission efficiency. The efficiency was increased by 19% when the transmission power was 100 W at the load of 30 Ω. -
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