A New Zero-Voltage Switching Half-Bridge Converter With Reduced Primary Conduction and Snubber Losses in Wide-Input-Voltage Applications

2018 ◽  
Vol 33 (12) ◽  
pp. 10419-10427 ◽  
Author(s):  
Jae-Bum Lee ◽  
Jae-Il Baek ◽  
Jae-Kuk Kim
Keyword(s):  
Input Voltage ◽  
Zero Voltage Switching ◽  
Zero Voltage ◽  
Voltage Switching

Research on the Half-Bridge Three-Level DC/DC Converter with High Frequency and High Voltage

2013 ◽  
Vol 732-733 ◽  
pp. 1175-1178
Author(s):  
Hong Zhang ◽  
Gui Xin Wang ◽  
Hao Yan ◽  
Lu Zhou Zhang
Keyword(s):  
High Voltage ◽  
Input Voltage ◽  
Zero Voltage Switching ◽  
High Voltage Direct Current ◽  
Parameters Selection ◽  
Converter Topology ◽  
Working Principle ◽  
Current Zero ◽  
Zero Voltage ◽  
Voltage Switching

In this research, a high-voltage direct current zero voltage switching (ZVS) PWM half-bridge converter is proposed. The parameters of the converter as follows: the input voltage is up to 4000V;the output voltage is 600V.The new ZVS PWM TL converter has neutral point clamping diodes and flying capacitor. This research is going to analyze the working principle of circuit witch thus realizing the zero voltage switching and the circuit parameters selection. Moreover, circuits simulation is carried out by MATLAB to verify the reliability and feasibility of this DC/DC converter topology.

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 A Duty Cycle Controlled ZVS Buck Converter With Voltage Doubler Type Auxiliary Circuit

2021 ◽  
Vol 9 ◽  
Author(s):  
Sana Basharat ◽  
Saeed Ehsan Awan ◽  
Rizwan Akhtar ◽  
Alamdar Hussain ◽  
Shahid Iqbal ◽  
...  
Keyword(s):  
Heat Dissipation ◽  
Research Work ◽  
Input Voltage ◽  
Buck Converter ◽  
Zero Voltage Switching ◽  
Switching Losses ◽  
Compact Size ◽  
Zero Voltage ◽  
Voltage Switching ◽  
Auxiliary Circuit

DC–DC converters have wide applications in industries, motor drive circuits, electric vehicles, and power supplies. In traditional converters hard switching occurs due to switching losses. This imposes constraints on the converter’s efficiency which results in heat dissipation and reduction in the converter’s life. The proposed converter aims to encounter the hard switching problem with the provision of soft switching features. The presented topology is efficient with respect to the features of cost, compact size and durable lifetime of converter topology with the provision of low switching stresses. This research work proposes a novel stepdown converter with zero voltage switching characteristics. With the use of half bridge inverter switches and series resonant components in the auxiliary circuit, the target of zero voltage switching and reduction in switching stresses has been achieved. The proposed 500 W converter is designed to operate at frequency of 100 KHz with 300 V source input voltage. Output voltage of the converter is 150 V.

scholarly journals Extension of Zero Voltage Switching Capability for CLLC Resonant Converter

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 818
Author(s):  
HwaPyeong Park ◽  
DoKyoung Kim ◽  
SeungHo Baek ◽  
JeeHoon Jung
Keyword(s):  
Input Voltage ◽  
Voltage Gain ◽  
Resonant Converter ◽  
High Power Conversion Efficiency ◽  
Load Range ◽  
Zero Voltage Switching ◽  
Voltage Variation ◽  
Sinusoidal Current ◽  
Zero Voltage ◽  
Voltage Switching

TheCLLC resonant converter has been widely used to obtaina high power conversion efficiency with sinusoidal current waveforms and a soft switching capability. However, it has a limited voltage gain range according to the input voltage variation. The current-fed structure canbe one solution to extend the voltage gain range for the wide input voltage variation, butit has a limited zero voltage switching (ZVS) range. In this paper, the current-fed CLLC resonant converter with additional inductance is proposed to extend the ZVS range. The operational principle is analyzed to design the additional inductance for obtaining the extended ZVS range. The design methodology of the additional inductance is proposed to maximize the ZVS capability for the entire load range. The performance of the proposed method is verified with a 20 W prototype converter.

scholarly journals Analysis and Verification of a Wide Input Voltage PWM Converter with Variable Windings

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1634
Author(s):  
Bor-Ren Lin ◽  
Ji-Wei Chang
Keyword(s):  
Pulse Width Modulation ◽  
Input Voltage ◽  
Zero Voltage Switching ◽  
Multi Stage ◽  
Power Switches ◽  
Input Side ◽  
Circuit Components ◽  
Switching Characteristics ◽  
Zero Voltage ◽  
Voltage Switching

A three-leg pulse-width modulation converter with auxiliary windings is provided and investigated to realize wide voltage operation and zero voltage switching characteristics on power switches. The presented converter has three converter legs on the input-side and two sets of winding turns on the output-side. Owing to the on/off states of the three converter legs and the two sets of secondary winding turns, the proposed converter can be operated under three different equivalent circuits to have wide input voltage operation from 30V ~ 240V (Vin,max = 8Vin,min). Compared with the multi-stage converters to realize wide input voltage operation, the proposed circuit topology has fewer circuit components and a simple control algorithm. Conventional duty cycle control with phase-shift between each converter leg is adopted to regulate load voltage and also accomplish zero voltage switching on active switches. The presented three-leg converter is tested with a laboratory circuit. Finally, experiments testify to the performance and validity of the presented converter.

scholarly journals A Family of Magnetic Coupling DC-DC Converters With Zero-Voltage-Switching Over Wide Input Voltage Range and Load Variation

2016 ◽  
Vol 16 (5) ◽  
pp. 1639-1649 ◽  
Author(s):  
Guipeng Chen ◽  
Jie Dong ◽  
Yan Deng ◽  
Yong Tao ◽  
Xiangning He ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Input Voltage ◽  
Voltage Range ◽  
Zero Voltage Switching ◽  
Load Variation ◽  
Zero Voltage ◽  
Voltage Switching
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