scholarly journals Design and operation of closed-loop triple-deck buck-boost converter with high gain soft switching

2020 ◽  
Vol 11 (1) ◽  
pp. 523
Author(s):  
S. Narasimha ◽  
Surender Reddy Salkuti
Keyword(s):  
Closed Loop ◽  
High Gain ◽  
Pi Controller ◽  
Boost Converter ◽  
Vital Role ◽  
Soft Switching ◽  
Parallel Operation ◽  
Zero Voltage Switching ◽  
Switching Losses ◽  
Zero Voltage

<span>This paper presents the design and operation of three-stage buck-boost converter with high gain soft switching using closed loop proportional integral (PI) controller. The proposed converter is designed by arranging three identical buck-boost converters working in parallel. The converter units are connected to each other by an inductor as a bridge. This inductor plays a vital role in soft switching operation of converter by maintaining the voltage applied to switches at zero voltage at switching intervals, i.e., the zero-voltage switching (ZVS). The closed-loop system is designed by PI controller, and it maintains the output constant irrespective of changes in input, and the system becomes stable. The proposed converter is efficient in reducing switching losses, leading to improved converter efficiency. Due to parallel operation of three identical converters, the output voltage and input current contain fewer ripples than those of a single converter with same specifications. Proposed converter is more economical and reliable with simpler structure as it utilizes only two inductors as extra elements. The design and analysis of proposed circuit has been carried out in MATLAB Simulink by operating the circuit in various modes.</span>

scholarly journals Soft-Switching High Gain Step-Up DC/DC Converter without Auxiliary Switches

2019 ◽  
Vol 8 (12S) ◽  
pp. 633-636
Keyword(s):  
Theoretical Analysis ◽  
Power Flow ◽  
High Efficiency ◽  
Input Voltage ◽  
High Gain ◽  
Soft Switching ◽  
Zero Voltage Switching ◽  
Auxiliary Cell ◽  
Zero Voltage ◽  
Voltage Switching

This manuscript presents a novel high gain, high efficiency Soft-switching high step-up DC/DC converter for battery-operated vehicles. The high step-up converter can transfer the power flow from the small voltage to high voltage. The conventional two input inductor hard switched non-isolated DC-DC converter improved with an additional auxiliary cell to attain the Zero voltage switching, due to obtaining the softswitching the efficiency may improve and reduces the stress across the main switches. The isolated converters are used as a transformer to attain high gain, whereas in the proposed converter obtains the high gain without a transformer and contains the high efficiency in the step-up mode of operation. The main aim of the converter is to attain the Zero voltage switching without using any additional auxiliary switches. In this paper, the input voltage applied as 30V, and the obtained output voltage is fifteen times to the applied voltage, which is 450V and the output power 850W. This paper mainly presents the theoretical analysis of converter operation and the evaluation of the simulation results validated with the theoretical analysis.

scholarly journals Analysis, Design and Experimental Validation of Modified Simple Soft Switching DC-DC Boost Converter

2015 ◽  
Vol 16 (4) ◽  
pp. 331-337 ◽  
Author(s):  
S. Raghavendran ◽  
B. Chitti Babu ◽  
Luigi Piegari
Keyword(s):  
Theoretical Analysis ◽  
Experimental Validation ◽  
Soft Switching ◽  
Zero Voltage Switching ◽  
Switching Losses ◽  
Zero Current Switching ◽  
Zero Current ◽  
Analysis Design ◽  
Zero Voltage ◽  
Voltage Switching

Abstract This paper investigates a modified simple soft switching dc-dc converter for low power applications. This simple topology uses an auxiliary switch, an inductor and a capacitor to operate the converter without switching losses. The efficiency of the converter is improved by transferring the energy that would be dissipated during the switching to the load. The main switch turns-on with zero current switching (ZCS) and turns-off with zero voltage switching (ZVS), while the auxiliary switch turns-on and turns-off with zero voltage switching (ZVS). The detailed theoretical analysis and the design equations are described. In addition to that, the analysis of proposed converter is demonstrated by both simulation and experimental results for effectiveness of the study.

scholarly journals A Non-Inverting Soft Switching Buck-Boost Converter (Closed Loop) and It’s Performance Against Various Converters

2020 ◽  
Vol 9 (5) ◽  
pp. 399-403
Keyword(s):  
Closed Loop ◽  
Coupling Effect ◽  
Magnetic Coupling ◽  
Boost Converter ◽  
Soft Switching ◽  
Performance Characteristics ◽  
Switching Losses ◽  
Overall Efficiency

A Non-inverting soft switching buck-boost Converter is presented. One of the major hurdles that every converters face is switching losses. This loss is associated with the switches that are used to build the converters. To overcome this, magnetic coupling effect has been introduced to the proposed converter. This magnetic coupling effect helps the converter to obtain an adjustable soft switching range. Theoretically, it has been said that soft switching results in zero switching losses. That way, the losses due to switching can be neglected and that helps in improving the overall efficiency. In the paper, we have proposed a soft switching non inverting buck-boost converter and compared its performance characteristics with various other converters.

scholarly journals Design, Analysis and Implementation of a Novel Soft-Switched Bridgeless Interleaved Boost PFC Converter

2019 ◽  
Vol 8 (2) ◽  
pp. 3930-3935
Keyword(s):  
Power Factor ◽  
Electromagnetic Interference ◽  
Soft Switching ◽  
Current Harmonics ◽  
Zero Voltage Switching ◽  
Switching Losses ◽  
Interleaved Boost Converter ◽  
Ripple Reduction ◽  
Source Voltage ◽  
Zero Voltage

In the modern era, the electronic equipments are widely used and it is required to maintain the supply current harmonics within the standards specified by IEC. Efforts are taken to get better power factor of these supplies using Bridgeless Interleaved Boost Converter (IBC) topology. The efficiency and the power factor of the bridgeless converter is improved in contrast to the conventional PFC as the bridged structure is eliminated. Main objective of the paper is to propose a novel Zero Voltage Switched Bridgeless IBC. This bridgeless configuration is investigated by analyzing the attributes such as output power, mark-space ratio, source voltage, input current with each other. With zero-voltage switching, the voltage regulator can engage in soft switching, which helps to minimize switching losses and electromagnetic interference. This paper also compares performance parameters such as power factor, efficiency, THD and ripple with and without ZVS in a bridgeless IBC circuit. The results show that there is a considerable ripple reduction and power factor improvement with increase in efficiency on incorporating soft switching. Replication of the projected circuit is executed in simulation and the outputs are verified using hardware implementation.

scholarly journals Simple Structure of Soft Switching for Boost Converter

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5448
Author(s):  
Yeu-Torng Yau ◽  
Kuo-Ing Hwu ◽  
Jenn-Jong Shieh
Keyword(s):  
Frequency Control ◽  
Resonance Method ◽  
Boost Converter ◽  
Soft Switching ◽  
Constant Frequency ◽  
Zero Voltage Switching ◽  
Current Switching ◽  
Zero Current Switching ◽  
Zero Current ◽  
Zero Voltage

A soft switching boost converter, with a small number of components and constant frequency control, is proposed herein by using the quasi-resonance method and the zero-voltage-transition method, realizing (1) the zero-voltage switching during the switch-on transient of the main switch, (2) the zero-current switching during the switch-off transient of the main switch, (3) the zero-current switching during the switch-on transient of the auxiliary switch, and (4) the zero-current switching during the switch-off transient of the auxiliary switch. Accordingly, the corresponding efficiency can be improved. The feasibility and effectiveness of the proposed structure are validated by the field programmable gate array (FPGA).

scholarly journals Positive output elementary Luo converter for fixed-frequency ZVS operation

2017 ◽  
Vol 65 (2) ◽  
pp. 255-262
Author(s):  
S. J. V. Bright ◽  
S. Ramkumar ◽  
H. Anand
Keyword(s):  
Electromagnetic Interference ◽  
Experimental Studies ◽  
Soft Switching ◽  
Switching Frequency ◽  
Fixed Frequency ◽  
Zero Voltage Switching ◽  
Power Semiconductor ◽  
Semiconductor Switches ◽  
Switching Losses ◽  
Zero Voltage

Abstract Luo converter is one amid the developed DC-DC converters offering higher voltage gain. Soft-switching techniques, like zero-voltage switching (ZVS), repress switching losses, and hence the system efficiency and the life of the power semiconductor switches are improved. Incorporation of soft switching in fixed-frequency operation of the Luo converters may persuade them in the regulated power supply applications. The existing variable switching frequency solution suffers from a number of problems viz. complexity in filter designing, more electromagnetic interference (EMI), etc. This paper proposes a positive output elementary Luo converter (POELC) involving ZVS with the wherewithal of working in fixed frequency. A comprehensive discussion on the proposed circuit topology is detailed with both simulation and experimental studies. Systematic descriptions of basic POELC, variable-frequency ZVS-POELC, and fixed-frequency ZVS-POELC make an impact on the understanding of related concepts by the researchers in this field.

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