Proposition of an Ultra-High Voltage Gain Interleaved DC-DC Converter with ZVS Performance and Low Voltage Stresses Across Switches for Renewable Energy Systems Applications
Research/Original Article (دارای رتبه معتبر)
The proposed converter is an interleaved ultra-large gain converter based on coupled-inductor (CI), built-in transformer (BIT) and switched capacitor (SC). The main novelty of the proposed converter is that the voltage gain can be achieved in proportionate to the multiplication of the turn ratios of the CIs and BIT that increase the voltage gain of the proposed converter. Also, through this topology, the voltage stresses across the power switches are effectively reduced and as a result MOSFETs with low ON-state resistances can be implemented that reduces the cost and conduction losses. Implementation of active clamp technique not only facilitates zero voltage switching (ZVS) turn-ON and turn-OFF for all switches, but also recycles the energy of the leakage inductances. Moreover, due to the presence of the leakage inductances, all of the diodes are turned OFF with zero current switching (ZCS) performance and the associated reverse recovery problem is solved, effectively. Through extensive comparison discussion, it is concluded that the proposed converter with low number of components outperforms previously presented ones in the terms of the voltage gain and voltage stresses across switches. Finally, the performance of the proposed converter is validated through developing a 100kHz 600W 22-380V prototype.