An Interleaved High Step-up DC/DC Converter-Based Three-Winding Coupled Inductors with Symmetrical Structure

This paper proposes an interleaved high step-up converter based on three-winding coupled inductor (TW-CI) with symmetrical structure. By utilizing the TW-CI along with a voltage multiplier cell, the proposed converter achieves high power transfer ability as well as minimized voltage stress across po...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2023-05, Vol.38 (5), p.1-11
Main Authors: Li, Hongzhu, Li, Chao, Sun, Xuanjin, Cheng, Lihong, Li, Wenrui
Format: Article
Language:English
Subjects:
Boosting
Capacitors
Circuits
Clamps
Conduction losses
DC-DC converter
DC-DC power converters
Electric converters
high step-up
Inductors
low voltage stress
Power transfer
Stress
Switches
Three-Winding coupled inductor
Voltage
Voltage converters (DC to DC)
Voltage gain
Winding
Zero-Current Switching
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Summary:This paper proposes an interleaved high step-up converter based on three-winding coupled inductor (TW-CI) with symmetrical structure. By utilizing the TW-CI along with a voltage multiplier cell, the proposed converter achieves high power transfer ability as well as minimized voltage stress across power switches and diodes. The converter has significantly improved the voltage gain by integrating two TW-CIs with the passive clamp circuit. The leakage inductor energy of the TW-CI is recycled to improve the voltage gain and efficiency while facilitating the soft switching condition for the power switches. Additionally, the voltage stress across the power switches is decreased with the help of the clamping capacitors. Therefore, low-voltage-rated semiconductors with small on-resistance can be chosen which reduce conduction losses and improve the overall performance. Moreover, two series-connected capacitors of the primary side are introduced, which effectively balance the voltage between the power switches and the capacitors during steady and dynamic states. Finally, a 400W experimental prototype with 24V-400V is built to is verify the accuracy of proposed converter.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2023.3244809