Power Loss Model and Efficiency Analysis of the Quasi-Z-Source Isolated Buck-Boost Converter with Wide Input Voltage and Load Range

2020 ◽  
Author(s):  
Hamed Mashinchi Maheri ◽  
Dmitri Vinnikov ◽  
Andrii Chub ◽  
Vadim Sidorov
Keyword(s):  
Power Loss ◽  
Input Voltage ◽  
Efficiency Analysis ◽  
Boost Converter ◽  
Load Range ◽  
Loss Model

scholarly journals Power Loss Model and Efficiency Analysis of Three-Phase Inverter Based on SiC MOSFETs for PV Applications

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 75768-75781 ◽  
Author(s):  
Mohammed Hassan Ahmed ◽  
Mingyu Wang ◽  
Muhammad Arshad Shehzad Hassan ◽  
Irfan Ullah
Keyword(s):  
Power Loss ◽  
Efficiency Analysis ◽  
Loss Model ◽  
Phase Inverter ◽  
Three Phase ◽  
Three Phase Inverter

An AC/DC PFC Converter with Active Soft Switching Technique

2014 ◽  
Vol 3 (3) ◽  
pp. 101-121 ◽  
Author(s):  
S. Aiswariya ◽  
R. Dhanasekaran
Keyword(s):  
Power Factor ◽  
Input Voltage ◽  
Boost Converter ◽  
Soft Switching ◽  
Load Range ◽  
Turn On ◽  
Zero Current Switching ◽  
Zero Current ◽  
Output Side ◽  
Current Transition

This paper proposes an AC-DC converter with the application of active type soft switching techniques. Boost converter with active snubber is used to achieve power factor correction. Boost converter main switch uses Zero Voltage Transition switching for turn on and Zero Current Transition switching for turn off. The active snubber auxillary switch uses Zero Current Switching for both turn on and turn off. Since all the switches of the proposed circuit are soft switched, overall component stress has been greatly reduced and the output DC voltage is expected to have low ripples. A small amount of auxillary switch current is made to flow to the output side by the help of coupling inductor. The proposed circuit is simulated using MATLAB Simulink. All the related waveforms are shown for the reference. The power factor is measured as 0.99 showing that the input current and input voltage is in phase with each other. The PFC circuit has very less number of components with smaller size and can be controlled easily at a wide line and load range.

dual inductor-fed boost converter with an auxiliary transformer and voltage doubler

2013 ◽  
Vol 61 (4) ◽  
pp. 787-791
Author(s):  
J. Dawidziuk
Keyword(s):  
Input Voltage ◽  
Boost Converter ◽  
Switching Frequency ◽  
Time Duration ◽  
Two Phase ◽  
Load Range ◽  
Boost Converters ◽  
Conduction Loss ◽  
Voltage Doubler ◽  
Voltage Conversion

Abstract This paper presents a dual inductor-fed boost converter with an auxiliary transformer and voltage doubler for sustainable energy power converters. The new topology integrates a two-phase boost converter and a dual inductor-fed boost converter. The energy stored and transferred by both inductors can attain a wide input-voltage and load range which uses a constant switching frequency, by controlling the time duration of the simultaneous conduction of the two switches. Among other current-fed type boost converters the presented topology is attractive due to the high voltage conversion ratio, less stress on the components and less switch conduction loss. To verify the feasibility of this topology, the principles of operation, theoretical analysis, and experimental waveforms are presented for a 1 kW prototype.

Design Technique of High Power Efficiency LLC DC-DC Converters for Photovoltaic Cells

2018 ◽  
Vol 2 (1) ◽  
pp. 30
Author(s):  
Hisatsugu Kato ◽  
Yoichi Ishizuka ◽  
Kohei Ueda ◽  
Shotaro Karasuyama ◽  
Atsushi Ogasahara
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Photovoltaic Cells ◽  
Input Voltage ◽  
Design Technique ◽  
Load Range ◽  
Voltage Range ◽  
Simulation Results ◽  
Secondary Side ◽  
High Power Efficiency

This paper proposes a design technique of high power efficiency LLC DC-DC Converters for Photovoltaic Cells. The secondary side circuit and transformer fabrication of proposed circuit are optimized for overcoming the disadvantage of limited input voltage range and, realizing high power efficiency over a wide load range of LLC DC-DC converters. The optimized technique is described with theoretically and with simulation results. Some experimental results have been obtained with the prototype circuit designed for the 80 - 400 V input voltage range. The maximum power efficiency is 98 %.

scholarly journals Analysis of a Wide Voltage Hybrid Soft Switching Converter

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 473 ◽  
Author(s):  
Bor-Ren Lin ◽  
Yen-Chun Liu
Keyword(s):  
Power Conversion ◽  
Input Voltage ◽  
Soft Switching ◽  
Resonant Converter ◽  
Solar Pv ◽  
Load Range ◽  
Pwm Converter ◽  
Load Voltage ◽  
Zero Voltage Switching ◽  
Circulating Current

A hybrid PWM converter is proposed and investigated to realize the benefits of wide zero-voltage switching (ZVS) operation, wide voltage input operation, and low circulating current for direct current (DC) wind power conversion and solar PV power conversion applications. Compared to the drawbacks of high freewheeling current and hard switching operation of active devices at the lagging-leg of conventional full bridge PWM converter, a three-leg PWM converter is studied to have wide input-voltage operation (120–600 V). For low input-voltage condition (120–270 V), two-leg full bridge converter with lower transformer turns ratio is activated to control load voltage. For high input-voltage case (270–600 V), PWM converter with higher transformer turns ratio is operated to regulate load voltage. The LLC resonant converter is connecting to the lagging-leg switches in order to achieve wide load range of soft switching turn-on operation. The high conduction losses at the freewheeling state on conventional full bridge converter are overcome by connecting the output voltage of resonant converter to the output rectified terminal of full bridge converter. Hence, a 5:1 (600–120 V) hybrid converter is realized to have less circulating current loss, wide input-voltage operation and wide soft switching characteristics. An 800 W prototype is set up and tested to validate the converter effectiveness.

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