In this paper, a new maximum power-point tracking multiple-input boost converter is presented. The proposed structure monitors the input power and selects an input which would deliver the most power to the load. This is done using an extra phase to estimate and compare the available input power of the inputs. The available input power of a TEG depends on the open-circuit voltage and the internal resistance of the input source. Based on the analytical solutions, a simple circuitry is proposed which can predict which source should be selected in order to deliver the most power to the load. The proposed boost converter utilizes only a single inductor and a single capacitor and four switches. The proposed circuit is simulated using a 0.18-μm CMOS technology. HSpice simulation results show that the system can successfully selects an input which results in greater harvested power. The peak boost converter efficiency is 55% while delivering 7mW to the load.

本文提出了一种新的最大功率点跟踪多输入升压转换器。所提出的结构监视输入功率并选择将向负载提供最大功率的输入。这是通过使用额外的相位来估计和比较输入的可用输入功率来完成的。TEG的可用输入功率取决于开路电压和输入源的内部电阻。基于分析解决方案，提出了一种简单的电路，该电路可以预测应该选择哪个电源，以便向负载提供最大的功率。提出的升压转换器仅利用单个电感器和单个电容器以及四个开关。所建议的电路是使用0.18μmCMOS技术进行仿真的。HSpice仿真结果表明，该系统可以成功选择输入，从而获得更大的采集功率。升压转换器的峰值效率为55％，同时向负载提供7mW的功率。