Design and Analysis of a New Bidirectional DC-DC Converter with a High Voltage Conversion Ratio and Low Voltage Stress for Energy Applications

2020 ◽  
Author(s):  
Muhan He ◽  
Ye Liu ◽  
Hao Liu ◽  
Donghao Gu
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Conversion Ratio ◽  
Energy Applications ◽  
Voltage Stress ◽  
Voltage Conversion

scholarly journals A non‐isolated DC‐DC converter with low voltage stress and high step‐down voltage conversion ratio

2021 ◽  
Author(s):  
Stylianos P. Syrigos ◽  
Georgios C. Christidis ◽  
Theodoros P. Mouselinos ◽  
Emmanuel C. Tatakis
Keyword(s):  
Low Voltage ◽  
Conversion Ratio ◽  
Voltage Stress ◽  
Step Down ◽  
Voltage Conversion

scholarly journals A dual-switch cubic SEPIC converter with extra high voltage gain

2021 ◽  
Vol 12 (1) ◽  
pp. 199
Author(s):  
Christophe Raoul Fotso Mbobda ◽  
Alain Moise Dikandé
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Magnetic Coupling ◽  
Conversion Ratio ◽  
Duty Ratio ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Extra High Voltage ◽  
Voltage Conversion

To provide a high votage conversion ratio, conventional non-isolated DC-DC boost topologies, which have reduced voltage boost capability, have to operate with extremely high duty cycle ratio, higher than 0.9. This paper proposes a DC-DC converter which is mainly based on the narrow range of duty cycle ratio to achieve extra high voltage conversion gain at relatively reduced voltage stress on semiconductors. In addition, it does include any magnetic coupling structure. The structure of the proposed converter combines the new hybrid SEPIC converter and voltage multiplier cells. From the steady-state analysis, this converter has wide conversion ratio and cubic dependence with respect to the duty ratio and then, can increase the output voltage several times more than the conventional and quadratic converters at the same duty cycle ratio. However, the proposed dual-switch cubic SEPIC converter must withstand higher voltage stress on output switches. To overcome this drawback, an extension of the proposed converter is also introduced and discussed. The superiority of the proposed converter is mainly based on its cubic dependence on the duty cycle ratio that allows it to achieve extra high voltage gain at reduced voltage stress on semiconductors. Simulation results are shown and they corroborate the feasibility, practicality and validity of the concepts of the proposed converter.

scholarly journals Low-Voltage Stress Buck-Boost Converter With a High-Voltage Conversion Gain

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 95188-95196 ◽  
Author(s):  
Binxin Zhu ◽  
Shishi Hu ◽  
Guanghui Liu ◽  
Yu Huang ◽  
Xiaoli She
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Boost Converter ◽  
Conversion Gain ◽  
Voltage Stress ◽  
Voltage Conversion

scholarly journals Improvement of Static Voltage Gain of a Non-Isolated Positive Output Single-Switch DC-DC Converter Structure Using a Diode-Capacitor Cell

2021 ◽  
Vol 8 (4) ◽  
pp. 583-590
Author(s):  
D. Murali ◽  
S. Annapurani
Keyword(s):  
High Voltage ◽  
High Gain ◽  
Power Converter ◽  
Conversion Ratio ◽  
Voltage Gain ◽  
Dc Voltage ◽  
Energy Applications ◽  
Input Side ◽  
Voltage Conversion ◽  
Capacitor Cell

There are different low switching stress non-isolated DC-DC power converter structures developed for Photo-Voltaic (PV) applications with a view to achieve high voltage conversion ratio. The work proposed in this research article investigates the performance analysis of a coupled inductor and diode-capacitor multiplier cell based non-isolated high gain single-switch DC–DC conversion scheme with a single-ended primary-inductor on the input side. The presented converter suitable for renewable energy applications has the merits such as continuous input current, high voltage conversion ratio, and reduced voltage stress across the power switch. The multiplier cell consisting of two diodes and two capacitors is mainly used to enhance the converter output voltage level. A MATLAB / SIMULINK model of the suggested topology has been developed to validate its performance. During the simulation of the converter, a DC voltage of 50 V was given at the input side. The load end received a DC voltage of approximately 900 V. Thus, through this study, it was found that the addition of diode-capacitor cell can significantly improve the static gain of the suggested converter. The findings of this research may serve as a base for future studies on improvement of voltage gain of DC-DC converters.

scholarly journals Bidirectional Interleaved PWM Converter with High Voltage-Conversion Ratio and Automatic Current Balancing Capability for Single-Cell Battery Power System in Small Scientific Satellites

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2702 ◽  
Author(s):  
Masatoshi Uno ◽  
Masahiko Inoue ◽  
Yusuke Sato ◽  
Hikaru Nagata
Keyword(s):  
Power Systems ◽  
Single Cell ◽  
High Voltage ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Conversion Ratio ◽  
Pwm Converter ◽  
Bidirectional Converters ◽  
Battery Power ◽  
Voltage Conversion

Single-cell battery power systems are a promising bus architecture for small scientific satellites. However, to bridge the huge voltage gap between a single-cell battery and power bus, bidirectional converters with a high voltage conversion ratio and a large current capability for the low-voltage side are necessary. This article proposes a bidirectional interleaved pulse width modulation (PWM) converter with a high voltage conversion ratio and an automatic current balancing capability. By adding capacitors to conventional interleaved PWM converters, not only are inductor currents automatically balanced without feedback control or current sensors, but also voltage conversion ratios at a given duty cycle can be enhanced. Furthermore, the added capacitors can reduce voltage stresses of switches and charged-discharged energies of inductors, realizing more efficient power conversion and reduced circuit volume in comparison with conventional converters. A 100-W prototype was built for experimental verification, and results demonstrated the fundamental characteristics and efficacy of the proposed converter.

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

A High-Voltage ZVZCS DC--DC Converter With Low Voltage Stress

2008 ◽  
Vol 23 (6) ◽  
pp. 2630-2647 ◽  
Author(s):  
Ting-Ting Song ◽  
Huai Wang ◽  
H.S.-H. Chung ◽  
S. Tapuhi ◽  
A. Ioinovici
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Voltage Stress
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