A boost converter with capacitor multiplier and coupled inductor for AC module applications

Shih Ming Chen, Tsorng Juu Liang, Lung Sheng Yang, Jiann Fuh Chen

Research output: Contribution to journalArticlepeer-review

172 Citations (Scopus)


The grid-connected AC module is an alternative solution in photovoltaic (PV) generation systems. It combines a PV panel and a micro-inverter connected to grid. The use of a high step-up converter is essential for the grid-connected micro-inverter because the input voltage is about 15 V to 40 V for a single PV panel. The proposed converter employs a Zeta converter and a coupled inductor, without the extreme duty ratios and high turns ratios generally needed for the coupled inductor to achieve high step-up voltage conversion; the leakage-inductor energy of the coupled inductor is efficiently recycled to the load. These features improve the energy-conversion efficiency. The operating principles and steady-state analyses of continuous and boundary conduction modes, as well as the voltage and current stresses of the active components, are discussed in detail. A 25 V input voltage, 200 V output voltage, and 250 W output power prototype circuit of the proposed converter is implemented to verify the feasibility; the maximum efficiency is up to 97.3%, and full-load efficiency is 94.8%.

Original languageEnglish
Article number6029331
Pages (from-to)1503-1511
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number4
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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