A single-phase quasi-Z-source AC-AC converter with high-frequency transformer isolation

2016 ◽  
Author(s):  
Hafiz Furqan Ahmed ◽  
Honnyong Cha ◽  
Ashraf Ali Khan
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
High Frequency Transformer

scholarly journals Family of single‐phase isolated high‐frequency transformer integrated improved magnetically coupled Z‐source ac–ac converters

2020 ◽  
Vol 13 (9) ◽  
pp. 1901-1910
Author(s):  
Hafiz Furqan Ahmed ◽  
Mohamed Shawky El Moursi ◽  
Tooba Irshad ◽  
Ehab El‐Saadany ◽  
Khalifa Al Hosani
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
High Frequency Transformer ◽  
Ac Converters

scholarly journals Analytical description of power losses in a transformer operating in the dual active bridge converter

2016 ◽  
Vol 64 (3) ◽  
pp. 561-574
Author(s):  
R. Barlik ◽  
M. Nowak ◽  
P. Grzejszczak ◽  
M. Zdanowski
Keyword(s):  
Distributed Generation ◽  
High Frequency ◽  
Energy Flow ◽  
Single Phase ◽  
Renewable Energy Sources ◽  
Analytical Description ◽  
Power Losses ◽  
Dual Active Bridge ◽  
High Frequency Transformer

Abstract The paper presents an analytical approach to the determination of power losses in a high-frequency transformer operating in the dual active bridge (DAB). This transformer, having two single-phase transistor bridge inverters, couples two DC circuits that significantly differ in voltages (280 V and 51 V ±20%). Power losses in the core and windings of the planar transformer 5600 VA /100 kHz were calculated taking into account changes in the value and direction of the energy flow between the coupled DC circuits. These circuits represent storage or renewable energy sources and intermediate circuits of the converters used in distributed generation systems. Calculations were performed using the Steinmetz’s and Dowell’s equations. The analytical results have been verified experimentally.

scholarly journals Modified Structure of Sepic Based Single-Phase Five-Level T-Type Inverter for Photovoltaic Applications

2019 ◽  
Vol 9 (1) ◽  
pp. 3852-3856 ◽  
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Prototype Model ◽  
Matlab Simulation ◽  
Voltage Level ◽  
High Frequency Transformer ◽  
Photovoltaic Applications ◽  
Quality Of Supply

In this paper, a modified structure of two-stage sepic based five-level T-type inverter is presented for photovoltaic applications. The proposed topology consists of a frond-end sepic converter cascaded with full bridge T-type inverter through a high-frequency transformer. The proposed topology owns the merits of high boost output voltage level, modularity, reduced device parts, and better quality of supply. Therefore, a detailed operation of the proposed topology and the level generations using sine pulse width modulation are presented. Finally, the performance of the proposed topology is validated through Matlab simulation and experimental prototype model results

Single-Phase AC-DC-AC Multilevel Five-leg Converter Based on a High-Frequency Transformer

2021 ◽  
Author(s):  
Jean T. Cardoso ◽  
Cursino B. Jacobina ◽  
Phelipe L. S. Rodrigues ◽  
Antonio M. N. Lima
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
High Frequency Transformer

scholarly journals Single Phase AC to DC Isolated ZETA Power Factor Correction Converter fed LED drives

2020 ◽  
pp. 73-80
Author(s):  
S. T. Siddharthan ◽  
Andrew Jones ◽  
S. Kathikeyan
Keyword(s):  
Power Factor ◽  
High Frequency ◽  
Single Phase ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Supply System ◽  
Unity Power Factor ◽  
Current Harmonic ◽  
High Frequency Transformer ◽  
Bridge Rectifier

This paper deals with PFC-isolated Zeta converter fed LED drive to overcome the power factor problems. The proposed circuit topology consists of diode bridge rectifier and isolated Zeta converter with high frequency transformer. A single –phase supply is used to feed a DBR followed by a filter to avoid any switching ripple in DBR and the supply system. An isolated Zeta converter is operated to work under DCM mode. This combination of DBR and PFC converter is used to feed a LED drive. This converter is simulated in MATLAB platform. This converter provides better results such as unity power factor and less current harmonic distortion.

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