scholarly journals Comparision of Voltage Stress Across the MOSFET Switch of a Flyback Converter with Various Snubbers

2020 ◽  
Vol 5 (6) ◽  
pp. 1567-1571
Author(s):  
Soumya . ◽  
A.N Nagashree ◽  
R.S Geetha
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Switch Mode Power Supply ◽  
Critical Part ◽  
Leakage Inductance ◽  
Flyback Converter ◽  
Voltage Stress ◽  
Switch Mode ◽  
Active Clamp ◽  
Output Capacitance

A Flyback converter is a simple switch-mode power supply that can be used to generate a DC output from either an AC or DC input. The converter switch is the most critical part of any converter. The voltage stress across the switch is a major issue as the high voltage spikes occur due to interaction between its output capacitance and the leakage inductance of the transformer. These spikes can be reduced with various snubbers like conventional tertiary winding, Resistor Capacitor and Diode(RCD) snubber, energy regenerative snubber and an active clamp snubber. This paper aims to analyze and compare the voltage stress across the MOSFET switch of Flyback converter with various snubber circuits.

scholarly journals High voltage switch-mode power supply for electron-beam technology with minimum load breakdown energy

2018 ◽  
Vol 1109 ◽  
pp. 012027
Author(s):  
I V Vasyukov ◽  
A V Pavlenko ◽  
V S Puzin ◽  
A V Zhivodernikov ◽  
A V Batyukov ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Voltage ◽  
Power Supply ◽  
Switch Mode Power Supply ◽  
Switch Mode

Analysis of Active Clamp Forward Converter of UAV

2013 ◽  
Vol 336-338 ◽  
pp. 48-51
Author(s):  
Zhi Wei Cao ◽  
Yi Ming Zhang ◽  
Xu Zhang
Keyword(s):  
Power Supply ◽  
Order System ◽  
Switching Power Supply ◽  
Switch Mode Power Supply ◽  
Forward Converter ◽  
Switching Power ◽  
Voltage Stress ◽  
Active Clamp ◽  
Aerial Vehicle ◽  
Operation Characteristics

The Forward Switch mode power supply is good selection for power supplies of Unmanned Aerial Vehicle (UAV). Compared with the conventional forward converter, there is one auxiliary switch in the active clamp forward converter to recycle the energy stored in the transformer leakage in order to minimize the voltage stress of the main switch. The power system is designed and the operation characteristics of the active switching power supply are revealed by analysis a typical second-order system in this paper. Active Clamp Forward Converter reduce the generation of EMI, the EMC of UAV equipment is greatly improved. The results of the analysis are verified by SPICE simulation.

Application of Dual Switch Flyback Converter in Three-Phase Photovoltaic Inverter

2014 ◽  
Vol 986-987 ◽  
pp. 1759-1762
Author(s):  
Chun Yang Yi ◽  
Tian Fa Liao ◽  
Qian Jin Ma ◽  
Chang Wen Dong ◽  
Jia Xiang Xue
Keyword(s):  
High Voltage ◽  
Input Voltage ◽  
Leakage Inductance ◽  
Flyback Converter ◽  
Pv Inverter ◽  
Power Switch ◽  
Auxiliary Power ◽  
Snubber Circuit ◽  
Three Phase ◽  
Voltage Stress

Auxiliary power of Three-phase photovoltaic inverter is supplied by solar cells with wide input ranging from 140V to 1000V.The conventional single-switch flyback converter exists too high voltage stress in power switch to be applied in this inverter. This paper presents a dual-switch flyback converter in which the voltage stress of each switch is slightly higher than the input voltage when switches turn off, at the same time , the leakage inductance energy is recycled back into the inputside; otherwise, this topology needs no snubber circuit, so it is much more efficient than single switch flyback. The dual switch flyback converter with seven outputs is successfully applied in 10KW three phase PV inverter.

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%.

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