High step-up voltage-doubling DC-DC converter with coupled inductors

Yang, Cheng-Yan; Chen, Ming-Cheng; Ho, Tsung-Han; Lin, Jing‐Yuan; Hsieh, Yao‐Ching; Chiu, Huang‐Jen

doi:10.1109/ipemc.2016.7512324

Cited by 4 publications

(1 citation statement)

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“…What is more, a high turns ratio is demanded. Thus, some techniques such as switched capacitor techniques [12–16] and switched inductor techniques have been added to the non‐isolated converters integrating a coupled inductor to obtain a higher‐voltage gain and avoid a high turns ratio and an extreme duty cycle. However, the switch suffers higher transient charged and discharged current and high‐voltage stress due to the leakage inductance of the coupled inductor, so the efficiency is still low.…”

Section: Introductionmentioning

confidence: 99%

High step‐up cascaded DC–DC converter integrating coupled inductor and passive snubber

Pan

Liu

Wheeler³

et al. 2019

IET Power Electronics

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A new high step-up cascaded DC-DC converter is proposed in this study, which is composed of one cascaded boost converter, one diode-capacitor structure and a coupled inductor with extended voltage-doubling cell. The proposed converter can achieve high-voltage gain by adjusting the duty cycle and the turns ratio of the coupled inductor, which avoids the circuit operating at the extreme duty cycle. Moreover, a passive clamped circuit is utilised to decrease the voltage stresses on the power devices and absorb the energy of leakage inductance of the coupled inductor to increase voltage gain. Thus, it reduces the conduction losses and alleviates the reverse-recovery problem of diodes. In conclusion, the proposed converter can achieve high-voltage gain and improve efficiency. The operating principle and steady-state analysis of the proposed converter is illustrated in detail in this study. Finally, experimental results of a prototype circuit with input voltage 40 V, output voltage 300 V and output power 200 W are presented to verify the analysis results of the proposed converter.

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Section: Introductionmentioning

confidence: 99%