期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 60, 期 4, 页码 1483-1491出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2011.2177789
关键词
High step-up; high voltage gain; two-switch isolated converter; voltage-lift technique
资金
- National Science Council of Taiwan [NSC 100-3113-E-006-019-]
- Bureau of Energy, Ministry of Economic Affairs [100-D0204-2]
A novel two-switch high-step-up isolated converter with voltage lift is proposed in this paper. The proposed isolated converter utilizes a transformer with low turn ratio to achieve high step-up gain. The secondary winding charges two boosting capacitors in parallel as switches during the switch-on period, and two boosting capacitors are discharged in series during the switch-off period. Thus, the converter has high voltage gain with appropriate duty ratio. In addition, by using two clamping diodes and a capacitor on the primary side, leakage energy is recycled, and the voltage spikes of the two active switches are clamped, thereby improving conversion efficiency. Finally, experimental results based on a prototype implemented in the laboratory with an input voltage of 24 V, an output voltage of 200 V, and an output power of 200 W verify the performance of the proposed isolated converter; full-load efficiency is nearly 93%.
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