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High-Efficiency Modular High Step-Up Interleaved Boost Converter for DC-Microgrid Applications

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3 Author(s)
Ching-Ming Lai ; Power SBG, Lite-ON Technol. Corp., Taipei, Taiwan ; Ching-Tsai Pan ; Ming-Chieh Cheng

In this paper, a modular interleaved boost converter is first proposed by integrating a forward energy-delivering circuit with a voltage-doubler to achieve high step-up ratio and high efficiency for dc-microgrid applications. Then, steady-state analyses are made to show the merits of the proposed converter module. For closed-loop control design, the corresponding small-signal model is also derived. It is seen that, for higher power applications, more modules can be paralleled to increase the power rating and the dynamic performance. As an illustration, closed-loop control of a 450-W rating converter consisting of two paralleled modules with 24-V input and 200-V output is implemented for demonstration. Experimental results show that the modular high step-up boost converter can achieve an efficiency of 95.8% approximately.

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Industry Applications, IEEE Transactions on  (Volume:48 ,  Issue: 1 )