Modeling of Soft-Switching Losses of IGBTs in High-Power High-Efficiency Dual-Active-Bridge DC/DC Converters

2013 ◽  
Vol 60 (2) ◽  
pp. 587-597 ◽  
Author(s):  
Gabriel Ortiz ◽  
Hirofumi Uemura ◽  
Dominik Bortis ◽  
Johann Walter Kolar ◽  
Oscar Apeldoorn
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Soft Switching ◽  
Dual Active Bridge ◽  
Switching Losses

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.

Research on the High Frequency Realization of High-Power Inverter

2011 ◽  
Vol 383-390 ◽  
pp. 1077-1083
Author(s):  
Run Hua Liu ◽  
Gang Wang
Keyword(s):  
High Power ◽  
High Frequency ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Soft Switching ◽  
Multilevel Inverter ◽  
Switching Frequency ◽  
Switching Losses ◽  
Simulation And Experiment

The paper presents the inverter method which based on cascade multilevel inverter and MOSFET-assisted soft-switching of IGBT and modulation strategy against the double requirement of high-power inverter and high frequency. The method can effectively improve the output voltage, reduce harmonic distortion and switching losses, improve the switching frequency and meet the double requirement of the high-power inverter and high frequency. The method proved to be feasible by simulation and experiment.

Review of High Power DC/DC Soft-Switching Converters in Electrical Vehicles Application

2013 ◽  
Vol 321-324 ◽  
pp. 340-346
Author(s):  
Shuai Liu ◽  
Li Wei ◽  
Yi Cheng Zhang ◽  
Yong Tao Yao ◽  
Yun Xiong ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
High Power ◽  
Power Converters ◽  
Power Level ◽  
The State ◽  
Soft Switching ◽  
Switching Converters ◽  
Switching Losses ◽  
Electrical Vehicles ◽  
State Of Art

The application of soft-switching techniques is an important way to reduce switching losses of DC/DC converter. Aiming at the requirement of electric vehicles application, major soft-switching techniques for DC/DC converters are reviewed. Performance and design limitations are discussed. A comparison of soft-switching techniques used in high power converters of electric vehicles is presented. Through analyzing the state-of-art and existing deficiency of soft-switching techniques for DC/DC converters, it is concluded that power level upgrading, soft-switching range extending and auxiliary network simplification should be focused in the future.

Three-Phase Three-Level Soft Switching Dc-Dc Converter for Industrial Applications

2017 ◽  
Vol 8 (2) ◽  
pp. 785
Author(s):  
J. Sivavara Prasad ◽  
Y.P. Obulesh ◽  
Ch. Sai Babu
Keyword(s):  
High Power ◽  
Control Method ◽  
Industrial Applications ◽  
Soft Switching ◽  
Load Range ◽  
Switching Losses ◽  
Shift Control ◽  
Three Phase ◽  
Control Switch ◽  
Operational Modes

In high power DC applications, the single-phase DC-DC converter will face large voltage and current stress in each control switch and thereby the power handling capacity is less. To overcome this problem, three-phase DC-DC converter is used and it is suitable for high power applications with reduced number of switches as compared with the conventional topologies. The asymmetrical duty cycle control is considered to operate the switches under soft switching and hence the switching losses are reduced. The transformer leakage inductances are used along with junction capacitances in order to form resonance and hence ZVS commutation is possible in a wider load range. The modified phase shift control method is used for the proposed converter.The operational modes and design equations of the proposed converter have been observed. The simulation is carried out with a load of 1000W for validating the proposed work.

scholarly journals Three-Level DC-DC Controlled-Source Circuit of Marine Electromagnetic Detection Transmitter

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Haijun Tao ◽  
Guopeng Zhang ◽  
Zheng Zheng
Keyword(s):  
High Power ◽  
Electromagnetic Waves ◽  
High Efficiency ◽  
Mineral Resources ◽  
Soft Switching ◽  
High Voltage Power Supply ◽  
Controlled Source ◽  
Detection Depth ◽  
In Series ◽  
Electromagnetic Transmitter

Nowadays, marine electromagnetic method is a geophysical method which can effectively explore natural gas hydrate (NGH) resources. This method acquires seafloor structure and distribution laws of mineral resources by transmitting high-power electromagnetic waves to the seafloor, and its detection depth relies on the intensity of transmitted electromagnetic waves. At present, marine electromagnetic transmitter is not proper for transmission of high-power electromagnetic waves, and therefore, a novel controlled-source circuit of soft switching three-level marine electromagnetic transmitter is proposed in this paper, one step-down winding is added at the secondary side of high-frequency transformer in series connection with a linear inductor, asymmetric phase-shift PWM control is used, and soft switching of controlled-source circuit within the overall power range is realized. A detailed analysis of the operation process and circuit characteristics is given, and finally, a prototype is designed. Experimental results indicate that this circuit is of wide ZVS range and high efficiency, and it meets requirements for deep-sea detection of high-voltage power supply transmitter.

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