Abstract
A novel DC-DC converter topology that uses a three-winding coupled inductor (TWCI) and a new voltage-multiplication technique is presented for achieving high voltage gain. The proposed converter comprises one boost unit, one passive absorption circuit, and two voltage-multiplier cells. The tertiary winding of the coupled inductor is connected to a capacitor and diode, and this combination acts as a secondary voltage-multiplier cell (SVMC). The SVMC, when combined with two capacitors, the secondary winding of the coupled inductor, a diode, and a switch, forms a primary voltage-multiplier cell, which can achieve a large voltage-conversion ratio that can be adjusted easily. The new voltage-multiplier technique can be used to decrease the number of capacitors and diodes, which improves the transformation efficiency. A prototype circuit with a nominal rating of 300 W is designed to verify the correctness of theoretical analysis.
Highlights
A novel DC-DC converter topology that uses a three-winding coupled inductor (TWCI) and a new voltagemultiplication technique is presented for achieving high voltage gain
A fundamental boost converter can obtain high-voltage gain when operated with extremely high duty cycles
A family of high-step-up DC-DC converters was proposed, in which charging was performed through inductors and capacitors connected in parallel and discharging through inductors and capacitors connected in series [19]
Summary
Renewable energy sources such as fuel cells, wind, and photovoltaic systems are becoming indispensable globally, owing to environmental concerns and energy shortage [1,2,3,4,5]. A new type of converter was proposed, which could obtain high step-up voltage gain by adjusting the turns ratio of the coupled inductor properly, instead of increasing the duty cycle [21,22,23]. In this configuration, the leakage-inductor energy could be recycled to improve the conversion efficiency, by using a clamp circuit. A new single-switch high-step-up DC-DC converter was presented, which utilized the three-winding coupled inductor (TWCI) [33,34] This technique was expected to be suitable for power-conversion applications, to increase the power density. Coupled-inductor boost converters Fig. 1a (n2/n1=2N) Fig. 1b (n2/n1=2N) Fig. 1c (n2/n1=2N) Fig. 1d (n2/n1= n3/n1=N)
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call