Development of Non-Isolated High Step-Up DC/DC Power Converter with Coupled-Inductor
| Autor: | Yue-Han Wu, 吳岳翰 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 This thesis is to present a non-isolated single switch converter with high voltage gain. Its circuit topology is combined with coupled-inductor, clamp circuit and voltage lift capacitor techniques. The proposed converter has several advantages: First, the circuit controlled by only a single pulse width modulation (PWM) for the power switch. This design keeps the circuit simple and achieves a high voltage gain. Second, the proposed converter functions as clamp circuit so that the energy of the leakage inductance can be recycled to the capacitor. The voltage spike on the active switch is also suppressed and the efficiency is improved because of recycling the leakage energy. To deserve, the coupled-inductor can be adjusted by increasing the turn ratios of the secondary-side winding or third-side winding to achieve higher voltage gain feature. The operating principles, theoretical analysis, experimental waveforms and efficiency curves are presented. Finally, a prototype to verify the performance of the proposed converter with input voltage 48 V, output voltage 400 V and output power 1k W is implemented. As a result, the maximum efficiency is up to 96.5 % and full load efficiency is 92.3 %. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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