Abstract
This study presents a new high step-up converter based on the voltage multiplier cell and coupled inductor for renewable energy applications such as fuel cell and photovoltaic power systems. This converter achieves a high voltage conversion ratio using a coupled inductor and voltage multiplier cell (VMC). The voltage multiplier cell acts as a passive clamp circuit and reduces the maximum voltage across the power switch. The suggested topology has only one power switch in its structure, which leads to low cost and volume. The other benefits of the proposed structure are low components count, low input current ripple, low voltage stress throughout the semiconductors, high efficiency, zero-current switching (ZCS), and zero-voltage switching (ZVS) of diodes. Besides, due to the soft-switching condition of the diodes, the reverse recovery problem can be decreased. To show the effectiveness of the suggested topology, operation survey, steady-state analysis, and efficiency calculation are provided. Additionally, the comparison study with other similar converters illustrates the superiority of the proposed structure. Finally, an experimental prototype with 150 W rated power, 50 kHz switching frequency, and 24 V input voltage is implemented to prove the mathematical analysis and effectiveness of the proposed DC-DC converter.
Highlights
Photovoltaic (PV) energy applications for DC supplies are rapidly increased
Is study presents a new kind of nonisolated DC-DC converter based on the coupled inductor and voltage multiplier cell (VMC) for renewable energy applications such as PV power systems
Is converter can attain a high voltage conversion ratio using the coupled inductor turns ratio adjustment and used VMC. e suggested nonisolated converter has only one power metal-oxide-semiconductor field-effect transistor (MOSFET) in its structure, which leads to low cost and volume. e other advantages of the proposed topology are as follows: (1) low components count, (2) high efficiency, (3) low input current ripple, and (4) low voltage stress across the semiconductors. e applied VMC acts as a passive clamp circuit and reduces the maximum peak voltage throughout the power switch
Summary
Photovoltaic (PV) energy applications for DC supplies are rapidly increased. DC-DC power converters could be increased the voltage level to satisfy the load or transmission line requirements’ needs [5]. Due to these matters, the expansion of high voltage gain converters has emerged as one of the most influential and notable clarifications for utilizing renewable energy [6]. There are infrequent obstacles when a large number of the turn ratio is adjusted for the transformer as follows: (1) high parasitic capacitors of the transformer’s secondary winding, (2) parasitic circuit effects such as spikes, (3) increased component heating losses, (4) high leakage inductance, (5) noise production by windings, (6) large required input filters, and (6) cost enhancement
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