A High-Efficiency Non-Isolated High-Gain Interleaved DC-DC Converter with Reduced Voltage Stress on Devices

摘要

This paper proposes a new high-efficiency, non-isolated, interleaved DC-DC converter. The suggested structure consists of two interleaved modified step-up KY converters, to obtain a high voltage conversion ratio without the use of coupled inductors. The presented converter has a higher voltage gain than traditional interleaved boost, CUK, buck-boost, ZETA and SEPIC converters, and in suitable duty cycles, a high voltage conversion ratio can be obtained for the converter. Voltage stress of the power switches and diodes is low. Therefore, switches with low on-state resistance and low conduction losses can be used to enhance efficiency. Moreover, with the utilization of interleaving techniques the ripple of input current in the suggested topology is reduced. The steady-state analysis and operating principles of the suggested topology are expressed in this paper. Finally, in order to verify theoretical analysis and performance of the proposed converter, experimental measurement results are presented.