| Summary: | 碩士 === 國立高雄第一科技大學 === 電子工程研究所 === 103 === Three novel high efficiency interleaved converters with high step-up and low input current ripple for fuel cell power supply system are proposed in this thesis. The three-winding couple-inductor or transformer type is respectively utilized in the proposed interleaved converters, and the converters have characteristics which are the high step-up conversion, high circuit efficiency and low input-current ripple. For renewable energy applications, the higher power level or higher step-up conversion ratio is designed in the interleaved converters which are lower input-current ripple.
The interleaved forward-flyback converter employs the three-winding couple-inductor to extend the voltage gain and conversion efficiency, and the converter is verified via experiments. A 2k-Watts power supply with input voltage 48V and output voltage 380V. By employing the built-in transformer in interleaved boost converters, not only high step-up conversion but also high conversion efficiency are achieved. In addition, the lower current ripple performance can lengthen the life time of input source, especially in fuel cell stacks applications. The prototype circuits with input voltage 48 V and 24V, output voltage 380 V and output power rated 3.5 kW and 1 kW are implemented to demonstrate the functionality of proposed converters.
Finally, the hydrogen fuel cell power supply system with the proposed converter are verified, and shows the experimental results.
|
|---|
