Large Power Hybrid Soft Switching Mode PWM Full Bridge DC–DC Converter With Minimized Turn-on and Turn-off Switching Loss

2019 ◽  
Vol 34 (12) ◽  
pp. 11629-11644 ◽  
Author(s):  
Yong Shi ◽  
Xu-Wei Gui ◽  
Ji Xi ◽  
Xin Wang ◽  
Xu Yang
Keyword(s):  
Soft Switching ◽  
Switching Loss ◽  
Large Power ◽  
Turn On ◽  
Switching Mode

scholarly journals DC-DC converter with 50 kHz-500 kHz range of switching frequency for passive component volume reduction

2021 ◽  
Vol 11 (2) ◽  
pp. 1114
Author(s):  
Mohd Amirul Naim Kasiran ◽  
Asmarashid Ponniran ◽  
Nurul Nabilah Mad Siam ◽  
Mohd Hafizie Yatim ◽  
Nor Azmira Che Ibrahim ◽  
...  
Keyword(s):  
Boost Converter ◽  
Soft Switching ◽  
Volume Reduction ◽  
Resonant Circuit ◽  
Switching Frequency ◽  
Passive Component ◽  
Switching Loss ◽  
Passive Components ◽  
Turn On ◽  
High Switching Frequency

This paper presents the relationship of switching frequency towards passive components volume of DC-DC boost converter. Principally, the inductor current ripple and capacitor voltage ripple must be considered in order to design the inductor and capacitor, respectively. By increasing the switching frequency, smaller size and volume of passive component can be designed. As the consequences, the switching loss increases during switching transition at turn-ON and turn-OFF conditions. This paper used soft-switching technique to reduce the switching loss at turn-ON condition. The soft-switching technique is realized by adding resonant circuit in DC-DC boost converter. The effectiveness of resonant circuit will be analysed, thus, the efficiency of the converter can be improved. The range of switching frequency considered in the experimental are 50 kHz to 500 kHz. A 100 W prototype has been developed and tested in order to verify the principle. The switching loss experimentally confirm reduced by implementing soft-switching technique with efficiency converter improved from 96.36% to 97.12% when 500 kHz of switching frequency is considered. The passive components volume reduction is achieved when high switching frequency is used where the total volume of passive component when 50 kHz and 500 kHz are 0.083 dm3 and 0.010 dm3, respectively.

scholarly journals Implementation of Resonant and Passive Lossless Snubber Circuits for DC-DC Boost Converter

2018 ◽  
Vol 7 (4.30) ◽  
pp. 246
Author(s):  
A.N. Kasiran ◽  
A. Ponniran ◽  
A. A. Bakar ◽  
M.H. Yatim ◽  
M. K. R. Noor ◽  
...  
Keyword(s):  
Boost Converter ◽  
Soft Switching ◽  
Resonant Circuit ◽  
Switching Frequency ◽  
Passive Component ◽  
Switching Loss ◽  
Turn On ◽  
Switching Condition ◽  
Snubber Circuit ◽  
High Switching Frequency

This paper presents the comparison of resonant and passive lossless snubber circuits implementation for DC-DC boost converter to achieve soft-switching condition. By applying high switching frequency, the volume reduction of passive component can be achieved. However, the required of high switching frequency cause the switching loss during turn-ON and turn-OFF condition. In order to reduce the switching loss, soft-switching technique is required in order to reduce or eliminate the losses at switching devices. There are various of soft-switching techniques can be considered, either to reduce the switching loss during turn-ON only, or turn-OFF only, or both. This paper discusses comparative analyses of resonant and passive lossless snubber circuits which applied in the DC-DC boost converter structure. Based on the simulation results, the switching loss is approximately eliminated by applying soft-switching technique compared to the hard-switching technique implementation. The results show that the efficiency of resonant circuit and passive lossless snubber circuit are 82.99% and 99.24%, respectively. Therefore, by applying passive lossless snubber circuit in the DC-DC boost converter, the efficiency of the converter is greatly increased. Due to the existing of an additional capacitor in soft-switching circuit, it realizes lossless operation of DC-DC boost converter.

Superior Short Circuit Performance of 1.2kV SiC JBSFETs Compared to 1.2kV SiC MOSFETs

2019 ◽  
Vol 963 ◽  
pp. 797-800 ◽  
Author(s):  
Ajit Kanale ◽  
Ki Jeong Han ◽  
B. Jayant Baliga ◽  
Subhashish Bhattacharya
Keyword(s):  
High Temperature ◽  
Short Circuit ◽  
Switching Loss ◽  
Switching Circuit ◽  
Inductive Load ◽  
Circuit Performance ◽  
Switching Performance ◽  
Turn On ◽  
Switching Losses ◽  
High Side

The high-temperature switching performance of a 1.2kV SiC JBSFET is compared with a 1.2kV SiC MOSFET using a clamped inductive load switching circuit representing typical H-bridge inverters. The switching losses of the SiC MOSFET are also evaluated with a SiC JBS Diode connected antiparallel to it. Measurements are made with different high-side and low-side device options across a range of case temperatures. The JBSFET is observed to display a reduction in peak turn-on current – up to 18.9% at 150°C and a significantly lesser turn-on switching loss – up to 46.6% at 150°C, compared to the SiC MOSFET.

A Novel High Power Factor Soft-Switching Converter

2012 ◽  
Vol 433-440 ◽  
pp. 5549-5555
Author(s):  
Yun Tao Yue ◽  
Yan Lin
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
High Efficiency ◽  
Soft Switching ◽  
Switching Converter ◽  
Turn On ◽  
High Power Factor ◽  
Power Factor Corrector ◽  
Zero Voltage

A novel scheme of low power communication power supply with high power factor and soft-switching is presented, a power factor corrector and dc/dc converter of passive lossless soft-switching is based on a ML4803 IC control. DC/DC converter introduces a novel two-transistor forward soft-switching technique, which realizes zero-voltage turn-on and turn-off, with no additional switches. a communication power supply module is developed in this paper. It has the characteristics of rapid dynamic response, high power factor, high efficiency and small bulk ect.

scholarly journals HIGH FREQUENCY BOOST CONVERTER EMPLOYING SOFT SWITCHING AUXILIARY RESONANT CIRCUIT

2013 ◽  
pp. 262-267
Author(s):  
G. NARESH GOUD ◽  
Y. LAKSHMI DEEPA ◽  
G.DILLI BABU ◽  
P. RAJASEKHAR ◽  
N. GANGADHER
Keyword(s):  
Theoretical Analysis ◽  
High Frequency ◽  
Boost Converter ◽  
Soft Switching ◽  
Resonant Circuit ◽  
Switching Converter ◽  
Turn On ◽  
Switching Losses ◽  
Resonant Inductor ◽  
Switching Method

A new soft-switching boost converter is proposed in this paper. The conventional boost converter generates switching losses at turn ON and OFF, and this causes a reduction in the whole system’s efficiency. The proposed boost converter utilizes a soft switching method using an auxiliary circuit with a resonant inductor and capacitor, auxiliary switch, and diodes. Therefore, the proposed soft-switching boost converter reduces switching losses more than the conventional hard-switching converter. The efficiency, which is about 91% in hard switching, increases to about 97% in the proposed soft-switching converter. In this paper, the performance of the proposed soft-switching boost converter is verified through the theoretical analysis, simulation, and experimental results.

scholarly journals A Study of ZVS, ZCS and ZVZCS Techniques in Reducing the Energy Loss and Improving the Soft Switching Range

2020 ◽  
Author(s):  
Ratil H Ashique ◽  
Zainal Salam
Keyword(s):  
Energy Loss ◽  
Loss Factor ◽  
Recent Literature ◽  
Soft Switching ◽  
Low Loss ◽  
Turn On ◽  
Switching Losses ◽  
Extended Range ◽  
Simulation Results ◽  
Switch Voltage

This paper presents a comparative analysis of the ZVZCS soft switching technique with the ZVS and the ZCS counterpart. The generalization of the voltage-current crossover or the energy loss factor obtained from simulation of the prototype converter shows that the ZVZCS significantly reduces the loss and helps to improve the efficiency of the converter as compared to the ZVS or the ZCS. On the other hand, it is also found that the soft switching range of operation of the ZVS and the ZCS are largely affected by the maximum switch voltage and switch current respectively. In contrary, these factors have a negligible effect on the ZVZCS operation which results in an extended range of soft switching operation. Additionally, a detailed LTPICE simulation is performed for selected ZVS, ZCS and ZVSCS topologies from the recent literature and the switching losses in the main switches of the converters are measured. It is observed that the energy losses in the ZVZCS mode are reduced on average by approximately 26 % at turn on and 20 % at the turn off as compared to the ZVS and the ZCS. Besides, the low standard deviation in this mode confirms a stable low loss profile which renders extended soft switching range. An experimental test is also conducted by building the prototype converter to verify the simulation results. It is found that the switching losses are minimum while the converter is operated in the ZVZCS mode. Besides, the efficiency drop remains consistently low as compared to the ZVS and the ZCS in the whole operating range. Resultantly, the simulation and the experimental results are both found to be consistent.

A Soft Switching Full-Bridge DC-DC Converter with Active Auxiliary Circuit

2015 ◽  
Vol 793 ◽  
pp. 232-236
Author(s):  
Chanuri Charin ◽  
Nur Fairuz Mohamed Yusof ◽  
Mazwin Mazlan ◽  
Noor Haqkimi Adb Rahman
Keyword(s):  
Industrial Applications ◽  
Soft Switching ◽  
Experimental Results ◽  
Switching Loss ◽  
Pv System ◽  
Power Switches ◽  
Bridge Rectifier ◽  
Scale Down ◽  
Converter Topology ◽  
Auxiliary Circuit

DC-DC converters are widely used in many applications such as power supplies, PV system, renewable energy systems and industrial applications. One of the main problems in dc-dc converters is the switching loss which affects efficiency and also the power density of the converter. To alleviate the switching loss problem this paper proposes novel soft switching PWM isolated dc-dc converters topology. The proposed full bridge dc-dc converter with active auxiliary circuit is designed and tested with full-bridge rectifier diode. The proposed converter is designed and evaluated in term of soft switching. In the proposed topology, the soft switching operations are achieved by charging and discharging process of the capacitor and additional switches. In the proposed topology, all the power switches operate under soft-switching conditions. Therefore, the overall switching loss of the power switches is greatly reduced. The output voltage of the converter is varied by PWM control. The effectiveness of the new converter topology is evaluated by experimental results of a laboratory scale down prototype. The obtained experimental results are found agreed with theoretical and soft switching is achieved.

scholarly journals Predicting SiC MOSFET Behavior Under Hard-Switching, Soft-Switching, and False Turn-On Conditions

2017 ◽  
Vol 64 (11) ◽  
pp. 9001-9011 ◽  
Author(s):  
Md Rishad Ahmed ◽  
Rebecca Todd ◽  
Andrew J. Forsyth
Keyword(s):  
Soft Switching ◽  
Turn On

Load-Adaptive Soft-Switching Energy Recovery Sustainer for Plasma Display

2012 ◽  
Vol 241-244 ◽  
pp. 632-635
Author(s):  
H. L. Do
Keyword(s):  
Theoretical Analysis ◽  
Energy Recovery ◽  
Soft Switching ◽  
Switching Frequency ◽  
Switching Loss ◽  
Switching Characteristic ◽  
Switching Losses ◽  
Plasma Display ◽  
And Performance ◽  
A Current

In this paper, an energy recovery for plasma display is proposed. The proposed energy recovery sustainer provides soft-switching of main sustain switches and reduces the switching loss. Due to soft-switching characteristic, the switching losses of main switches are significantly reduced. In addition, the conduction losses in both main and auxiliary switches are effectively reduced by varying a current build-up time according to image patterns. Theoretical analysis and performance of the proposed energy recovery sustain driver were verified on an experimental prototype operating at 200 kHz switching frequency.

Sign in / Sign up

Export Citation Format

Share Document