Performance evaluation of interleaved high‐gain converter configurations

Abstract

This study presents the experimental verification of an interleaved high-gain (IHG) DC-DC converter using series and parallel configurations. The interleaved configurations allow the converter to achieve high voltage gain and high current rating, thus increasing the power rating of the converter. Analytical expressions for the design of these interleaved converter configurations are included in the study. The efficiency of the IHG DC-DC converter is increased due to the zero-voltage switching of all active switches and the zero-current switching of all diodes. Experimental results taken from three 1 kW prototypes with different configuration (non-interleaved, and series and parallel interleaved) are presented to verify the interleaving performance and efficiency. Moreover, the effect of soft-switching in terms of efficiency is demonstrated.

An Interleaved Soft Switching High Step-Up Converter With Low Input Current Ripple and High Efficiency

“…In addition, the voltage stress of the proposed converter is a half of that of the converter in [22], and less than one out of N of that of the converters in [24] and [37]. Moreover, the proposed converter achieves a low-ripple input current when the duty cycle D = 0.5 according to (22), compared with 2.2%, more than 6%, and 1% in [22], [24], and [37], respectively. Furthermore, the proposed converter achieves ZVS turned on and off for all power switches and ZCS turned-off for all rectifier diodes which lead to high converter efficiency (up to 96.8%) while other converters only realize ZCS turned-off or ZVS turned-on condition of each switch.…”

“…Table 3 gives a comparison of four different current-fed converters in terms of the number of components, input-current ripple, voltage stress, voltage gain and soft-switching realization, etc. It's obvious that the voltage gain of the proposed converter is four times higher than that of the converter in [22], and twice higher than that of the converters in [24] and [37]. In addition, the voltage stress of the proposed converter is a half of that of the converter in [22], and less than one out of N of that of the converters in [24] and [37].…”

“…It's obvious that the voltage gain of the proposed converter is four times higher than that of the converter in [22], and twice higher than that of the converters in [24] and [37]. In addition, the voltage stress of the proposed converter is a half of that of the converter in [22], and less than one out of N of that of the converters in [24] and [37]. Moreover, the proposed converter achieves a low-ripple input current when the duty cycle D = 0.5 according to (22), compared with 2.2%, more than 6%, and 1% in [22], [24], and [37], respectively.…”

“…It can be obtained by combining (24), (25) and (26) that: (27) where, θ= sin −1 (f s /πf 0 ). It is obvious that the output voltage ripple V o is inversely proportional to the output capacitance C 2 when other circuit parameters are fixed.…”

Implementation of a common grounded Z‐source DC–DC converter with improved operation factors

“…By developing green technologies such as photovoltaic panels, DC-DC converters have been widely used. Most of the renewable energy sources need DC-DC converters to boost low voltage in the renewable energy side to high voltage in the load side [1][2][3][4][5]. Traditional boost is the first choice of non-isolated DC-DC converters, which increases the voltage with infinite limitation based on its voltage gain equation.…”