A high efficiency flyback micro-inverter with a new adaptive snubber for photovoltaic applications

2015 ◽  
Author(s):  
Mohammad Ali Rezaei ◽  
Kui-Jun Lee ◽  
Alex Q. Huang
Keyword(s):  
High Efficiency ◽  
Photovoltaic Applications ◽  
Micro Inverter

scholarly journals Impact of Transformer Turns Ratio on the Power Losses and Efficiency of the Wide Range Isolated Buck–Boost Converter for Photovoltaic Applications

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5645
Author(s):  
Hamed Mashinchi Maheri ◽  
Dmitri Vinnikov ◽  
Andrii Chub ◽  
Vadim Sidorov ◽  
Elizaveta Liivik
Keyword(s):  
High Efficiency ◽  
Input Voltage ◽  
Power Losses ◽  
Efficient Operation ◽  
Wide Range ◽  
Photovoltaic Applications ◽  
Theoretical Predictions ◽  
Converter Topology ◽  
Isolation Transformer ◽  
The Impact

In this paper, the impact of transformer turns ratio on the performance of the quasi-Z-source galvanically isolated DC-DC converters is studied. Embedded buck–boost functionality enables these converters to regulate the input voltage and load in a wide range, which makes them suitable for such demanding application as photovoltaic microconverters. The isolation transformer here plays a central role as its turns ratio defines the point of transition between the boost and buck modes and overall capability of the converter to regulate the input voltage in a wide range at high efficiency. The studied quasi-Z-source galvanically isolated DC-DC converter is benchmarked in terms of power loss of components and weighted power conversion efficiency for three different turns ratios of isolation transformer to achieve the best and optimized turns ratio lead to the efficient operation. Operation in a wide range of input voltage at high efficiency is the main criterion for assessing the effect of turns ratio on the efficiency of the converter. The proposed loss model and theoretical predictions of the efficiency were validated with the help of a 300 W experimental prototype of the photovoltaic microconverter based on the quasi-Z-source galvanically isolated DC-DC converter topology.

A transformerless topology for a micro inverter with elevation factor of 1:10 for photovoltaic applications

2019 ◽  
Vol 109 ◽  
pp. 504-512 ◽  
Author(s):  
B. Vidales ◽  
José Luis Monroy-Morales ◽  
J.R. Rodríguez-Rodriguez ◽  
M. Madrigal ◽  
D. Torres-Lucio
Keyword(s):  
Photovoltaic Applications ◽  
Micro Inverter

Review and comparison of high efficiency high power boost DC/DC converters for photovoltaic applications

2011 ◽  
Vol 59 (4) ◽  
pp. 499-506 ◽  
Author(s):  
J. Dawidziuk
Keyword(s):  
High Power ◽  
High Efficiency ◽  
State Of The Art ◽  
Environmental Issues ◽  
Switching Frequency ◽  
Power Losses ◽  
Renewable Energy Systems ◽  
Boost Converters ◽  
Power Mosfets ◽  
Photovoltaic Applications

Review and comparison of high efficiency high power boost DC/DC converters for photovoltaic applicationsRecent environmental issues have accelerated the use of more efficient and energy saving technologies in renewable energy systems. High power high efficiency boost DC/DC converters for the use in photovoltaic, fuel cell systems are discussed in this paper from the viewpoint of power losses and efficiency. State of the art converters with switching frequency within the range of 25 kHz with IGBTs to 100 kHz with power MOSFETs and the highest efficiency close to 98%, depending on the load conditions, is considered. A comparison and discussion of the highest efficiency high power DC/DC boost converters is also presented in this paper.

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