A high-gain interleaved quadric DC-DC converter with dual-coupled inductors

Abstract

In this paper, an interleaved quadric DC-DC converter with dual coupled inductors is proposed. The interleaved structure at the input end realizes input continuity. At the same time, a dual-coupled structure is introduced, and the secondary side of the dual-coupled inductor and the diode-capacitor (D-C) branch are used to form a scalable voltage multiplier cell. Based on quadratic boost, the gain is further improved the impact of voltage and current is suppressed, the voltage stress of the device is reduced, and zero-current-switching is better achieved. The converter is theoretically analyzed and its performance is compared with other converters. Finally, a 200W experimental prototype was built to complete the experimental verification.