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一种高效率的电流馈入型高升压比ICPT系统

A High Efficiency Current-Fed High Step-up ICPT System

  • 摘要: 相较于高压输入高压输出,高升压比是低压输入高压大功率输出ICPT系统设计的最大挑战,不但松耦合变压器和补偿参数设计困难,而且发射线圈导通损耗高。为此,论文打破传统的电压馈入型思路,提出了一种基于反向耦合倍流逆变(Inverse Coupled Current Doubler inverter, ICCDI)和倍压整流的新型ICPT拓扑。该拓扑不仅具备四倍的升压能力,而且取消了传统电流馈入型逆变的串接二极管,有效降低了导通损耗及松耦合变压器和补偿参数的设计难度。为验证所提出方案的先进性,实验室搭建了一台输入28V、输出280V、功率1.4kW、传能间距50mm的原理样机。实验结果表明,所提出方案近似实现了280V的恒压输出,且满载效率和峰值效率分别为91.81%和95.25%,证明了研究和设计的正确性和先进性。

     

    Abstract: In contrast to high-voltage (HV) input to HV output configurations, the key challenge in designing low-voltage (LV) input to HV output high-power inductive coupled power transfer (ICPT) systems is the high voltage boost ratio. This not only results in the difficulties in designing the compensation parameters and loosely coupled transformer, but also leads to high conduction losses in the transmitter coil. To address these issues, this paper breaks away from the conventional voltage?fed approach and proposes a novel ICPT topology by incorporating an Inverse Coupled Current Doubler Inverter (ICCDI) and a voltage?doubler rectifier. The proposed topology not only provides higher the voltage step-up capability, but also eliminates the series diodes in traditional current?fed inverters. Thus, the conduction losses and the design difficulties of both the loosely coupled transformer and compensation parameters can be effectively reduced. To validate the advancement of the proposed scheme, a prototype with 28V input, 280V/5A output (1.4?kW), 50mm air gap is built and tested in the laboratory. Experimental results show that the proposed solution achieves nearly constant 280V output, with full?load efficiency and peak efficiency reaching 91.81?% and 95.25?%, respectively, confirming the validity and advancement of the research and design.

     

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