scholarly journals Analysis of loss distribution of Conventional Boost, Z-source and Y-source Converters for wide power and voltage range

2017 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Brwene Salah Gadalla ◽  
Erik Schaltz ◽  
Yam Siwakoti ◽  
Frede Blaabjerg
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Industrial Applications ◽  
Point Of View ◽  
Small Range ◽  
Voltage Gain ◽  
Boost Converters ◽  
Voltage Range ◽  
High Voltage Gain ◽  
Simulation Results

Boost converters are needed in many applications which require the output voltage to be higher than the input voltage. Recently, boost type converters have been applied for industrial applications, and hence it has become an interesting topic of research. Many researchers proposed different impedance source converters with their unique advantages as having a high voltage gain in a small range of duty cycle ratio. However, the thermal behaviour of the semiconductor devices and passive elements in the impedance source converter is an important issue from a reliability point of view and it has not been investigated yet. Therefore, this paper presents a comparison between the conventional boost, the Z-source, and the Y-source converters based on a thermal evaluation of the semiconductors. In addition, the three topologies are also compared with respect to their efficiency. In this study the results show that the boost converter has higher efficiency than the Zsource and Y-source converter for these specific voltage gain of 2 and 4. The operational principle, mathematical derivations, simulation results and final comparisons are presented in this paper.

scholarly journals A Transformer less Buck Boost Converter with Positive Output Voltage

2021 ◽  
Vol 9 (VII) ◽  
pp. 3575-3580
Author(s):  
Lambu Rushi Reddy
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Industrial Applications ◽  
Boost Converter ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Duty Cycles ◽  
Power Switches ◽  
Constant Output ◽  
Step Down

Some industrial applications require high step-up and step-down voltage gain. The transformer less buck-boost converter has high voltage gain than that of traditional buck-boost converter without extreme duty cycles. A transformer less buck-boost converter with simple structure is obtained by inserting an additional switched network into the traditional buck-boost converter. The two power switches of the buck-boost converter operate synchronously. The operating principles of the buck-boost converter operating in continuous conduction modes are presented. A new buck- boost converter is presented by providing a feedback to the converter. By this, constant output voltage can be maintained under varying load conditions in both buck and boost operation. The output voltage of 40V (step—up mode)/8V (step down mode) is obtained with input voltage 18V and the outcomes are approved through recreation using PSIM MODEL.

scholarly journals Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles

2020 ◽  
Vol 11 (4) ◽  
pp. 64 ◽  
Author(s):  
Zhengxin Liu ◽  
Jiuyu Du ◽  
Boyang Yu
Keyword(s):  
Electric Vehicles ◽  
High Voltage ◽  
Direct Current ◽  
Output Voltage ◽  
Input Voltage ◽  
Maximum Efficiency ◽  
Voltage Gain ◽  
Current Feedback ◽  
Voltage Ripple ◽  
High Voltage Gain

Direct current to direct current (DC/DC) converters are required to have higher voltage gains in some applications for electric vehicles, high-voltage level charging systems and fuel cell electric vehicles. Therefore, it is greatly important to carry out research on high voltage gain DC/DC converters. To improve the efficiency of high voltage gain DC/DC converters and solve the problems of output voltage ripple and robustness, this paper proposes a double-boost DC/DC converter. Based on the small-signal model of the proposed converter, a double closed-loop controller with voltage–current feedback and input voltage feedforward is designed. The experimental results show that the maximum efficiency of the proposed converter exceeds 95%, and the output voltage ripple factor is 0.01. Compared with the traditional boost converter and multi-phase interleaved DC/DC converter, the proposed topology has certain advantages in terms of voltage gain, device stress, number of devices, and application of control algorithms.

scholarly journals Smooth-Transition Simple Digital PWM Modulator for Four-Switch Buck-Boost Converters

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 100
Author(s):  
Miguel Fernandez ◽  
Alberto Rodriguez ◽  
Miguel Rodríguez ◽  
Aitor Vazquez ◽  
Pablo Fernandez ◽  
...  
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Input Voltage ◽  
Smooth Transition ◽  
Boost Converters ◽  
Voltage Range ◽  
Pulse Width Modulator ◽  
Digital Pulse ◽  
Smooth Transitions

This paper proposes a simple, hardware-efficient digital pulse width modulator for a 4SBB that enables operation in Buck, Boost, and Buck+Boost modes, achieving smooth transitions between the different modes. The proposed modulator is simulated using Simulink and experimentally demonstrated using a 500 W 4SBB converter with 24 V input voltage and 12–36 V output voltage range.

scholarly journals High gain multiphase boost converter based-on capacitor clamping structure

2021 ◽  
Vol 24 (2) ◽  
pp. 689
Author(s):  
Oday Saad Fares ◽  
Jasim Farhood Hussen
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Low Voltage ◽  
High Gain ◽  
Industrial Applications ◽  
Boost Converter ◽  
Power Device ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
And Performance

<p>In the last few years, the non-isolated dc converters involving high voltage gain with adequate performance are becoming quite popular in industrial applications. This is resulting in high voltage and current stress on the power device (switches and diodes), as well as a limited output voltage with a high duty cycle. This paper proposes a multi-phase non-isolated boost converter that uses capacitor clamping to increase output voltage while reducing stress across the power device. There are two stages in the proposed converter (first stage is three inductors and three switches and the second stage is clamper circuit of three capacitors and three diodes). The proposed converter is high voltage gain, with low voltage stress through switches transistors. To justify the theoretical analysis, the concept was validated through mathematical analysis and by simulation using MATLAB/SIMULINK. The results carried out the results permit the converter behavior and performance to be accurately.</p>

scholarly journals Novel Step-up DC-to-DC Converter with Isolated Transformer and Switched-Clamp Capacitor Techniques for Renewable Systems

2016 ◽  
Author(s):  
Yong-Seng Wong ◽  
Jiann-Fuh Chen ◽  
Kuo-Bin Liu
Keyword(s):  
Steady State ◽  
High Voltage ◽  
Output Voltage ◽  
Input Voltage ◽  
Power Converter ◽  
Maximum Efficiency ◽  
Voltage Gain ◽  
Power Switch ◽  
High Voltage Gain ◽  
Voltage Stress

A high step-up DC-to-DC converter that integrates an isolated transformer and a switched-clamp capacitor is presented in this study. The voltage stress of the main power switch should be clamped to 1/4 V by using the turn ratio and switched-clamp capacitor of an isolated transformer to achieve a high voltage gain. In addition, a passive clamp circuit is employed reduce voltage stress on the main power switch. The energy of the leakage inductor can be recycled by the clamp capacitor because of the passive clamp circuit, thereby improving the power converter efficiency. The converter consists of one isolated transformer, one main switch, three capacitors, and four diodes. Operating principle and steady-state analyses are also discussed. Finally, a 24-V-input voltage to 200-V-output voltage and a 150 W output power prototype converter are fabricated in the laboratory. The maximum efficiency of the converter is 95.1 at 60 W.

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 %.

A Nonisolated DC–DC Boost Converter With High Voltage Gain and Balanced Output Voltage

2014 ◽  
Vol 61 (12) ◽  
pp. 6739-6746 ◽  
Author(s):  
George Cajazeiras Silveira ◽  
Fernando Lessa Tofoli ◽  
Luiz Daniel Santos Bezerra ◽  
Rene Pastor Torrico-Bascope
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
High Voltage Gain
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