A Family of High Step-Up Interleaved DC-DC Converters Based on the Coupled Inductors
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Abstract
This article proposes a series of high-step-up interleaved dc–dc converters utilizing coupled inductors and quadratic voltage gains. The first proposed converter is a modified version of the Dickson-based converter, which offers a higher voltage gain compared to the modified Dickson converter while maintaining common ground. The second proposed converter uses an additional diode to achieve a higher voltage gain than the first proposed converter. The third proposed converter combines the Dickson and modified Dickson converters to address the lack of common ground in the modified Dickson converter. These converters provide several advantages, including continuous input current with low ripple, low voltage stress across the components, and high efficiency. The operation modes of these converters are analyzed, and their final relationships are presented. Furthermore, the first proposed converter is designed, and its losses are calculated. Also, the power density of the proposed converter is calculated and compared with some similar converters. A comparison is made between the proposed converters and other recently introduced interleaved converters to assess their advantages and disadvantages. Finally, a laboratory sample of the first proposed converter is implemented at 500 W to validate its performance, and its dynamic responses are presented.