TY - JOUR
T1 - High Step-Up Coupled-Inductor Cascade Boost DC-DC Converter with Lossless Passive Snubber
AU - Lee, Sin Woo
AU - Do, Hyun Lark
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2018/10
Y1 - 2018/10
N2 - In this paper, a high step-up coupled-inductor cascade boost DC-DC converter with lossless passive snubber is proposed. Although a conventional cascade boost converter has larger voltage gain compared to a boost converter, it is still not suitable for high step-up voltage conversion. In the proposed converter, a coupled inductor is adopted for the cascaded boost converter to further increase the voltage gain. However, a leakage inductance of the coupled inductor causes a high voltage spike at a main switch. A resistor-capacitor-diode snubber is commonly used to simply solve this problem, but it is also the cause of additional power loss. Therefore, the lossless passive snubber is suggested in this paper in order to prevent efficiency drop by a snubber circuit. In conclusion, the proposed converter has high voltage gain and improved power efficiency. Experimental results from an output 400-V 200-W prototype at a constant switching frequency of 50 kHz are presented to verify the performance of the proposed converter.
AB - In this paper, a high step-up coupled-inductor cascade boost DC-DC converter with lossless passive snubber is proposed. Although a conventional cascade boost converter has larger voltage gain compared to a boost converter, it is still not suitable for high step-up voltage conversion. In the proposed converter, a coupled inductor is adopted for the cascaded boost converter to further increase the voltage gain. However, a leakage inductance of the coupled inductor causes a high voltage spike at a main switch. A resistor-capacitor-diode snubber is commonly used to simply solve this problem, but it is also the cause of additional power loss. Therefore, the lossless passive snubber is suggested in this paper in order to prevent efficiency drop by a snubber circuit. In conclusion, the proposed converter has high voltage gain and improved power efficiency. Experimental results from an output 400-V 200-W prototype at a constant switching frequency of 50 kHz are presented to verify the performance of the proposed converter.
KW - Boost converter
KW - cascade converter
KW - coupled inductor
KW - high step-up converter
KW - lossless passive snubber
UR - http://www.scopus.com/inward/record.url?scp=85041498821&partnerID=8YFLogxK
U2 - 10.1109/TIE.2018.2803731
DO - 10.1109/TIE.2018.2803731
M3 - Article
AN - SCOPUS:85041498821
SN - 0278-0046
VL - 65
SP - 7753
EP - 7761
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 10
ER -