scholarly journals A Bilateral Zero-Voltage Switching Bidirectional DC-DC Converter with Low Switching Noise

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2618 ◽  
Author(s):  
Chien-Chun Huang ◽  
Tsung-Lin Tsai ◽  
Yao-Ching Hsieh ◽  
Huang-Jen Chiu
Keyword(s):  
Power Converter ◽  
Experimental Results ◽  
Switching Noise ◽  
Zero Voltage Switching ◽  
Switching Power ◽  
Bidirectional Converter ◽  
Wide Range ◽  
Power Switches ◽  
Zero Voltage ◽  
Voltage Switching

This paper proposes a novel bilateral zero-voltage switching (ZVS) bidirectional converter with synchronous rectification. By controlling the direction and timing of excessive current injection, the main power switches can achieve bilateral ZVS under various loads and output voltages. Compared with the common soft-switching power converter with only zero-voltage turn-on, the proposed bilateral ZVS bidirectional converter can achieve both zero-voltage switching on and off in every switching cycle. This feature can alleviate the output switching noise due to the controlled rising and falling slope of the switch voltage. Furthermore, the voltage slopes almost remain unchanged over a wide range of output voltages and load levels. The most important feature of bilateral ZVS is to reduce the output switching noise. Experimental results based on a 1 kW prototype are presented to demonstrate the performance of the proposed converter. From experimental results on the proposed scheme, the switching noise reduction is about 75%.

Zero-Voltage-Switching Buck-Boost Converter with a Coupled Inductor Based on Magnetic Materials

2012 ◽  
Vol 459 ◽  
pp. 51-53
Author(s):  
Hyun Lark Do
Keyword(s):  
Steady State ◽  
Magnetic Materials ◽  
Boost Converter ◽  
Experimental Results ◽  
Switching Loss ◽  
Steady State Analysis ◽  
Zero Voltage Switching ◽  
Power Switches ◽  
Zero Voltage ◽  
Voltage Switching

A zero-voltage-switching (ZVS) buck-boost converter with a coupled inductor based on magnetic materials is proposed in this paper. An auxiliary circuit consisting of an additional winding to the main inductor, an auxiluary inductor, and an auxiliary diode is utilized to obtain the ZVS operation of power switches. Due to the ZVS operation, the switching loss is significantly reduced. The operation principle and steady-state analysis of the proposed converter are provided. A prototype of the proposed converter is developed, and its experimental results are presented for validation

Phase-shifted Series Resonant Converter with Zero Voltage Switching Turn-on and Variable Frequency Control

2017 ◽  
Vol 8 (3) ◽  
pp. 1184 ◽  
Author(s):  
Mohamed Salem ◽  
Awang Jusoh ◽  
Nik Rumzi Nik Idris ◽  
Tole Sutikno ◽  
Yonis.M.Yonis Buswig
Keyword(s):  
Output Voltage ◽  
Frequency Control ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Zero Voltage Switching ◽  
Light Load ◽  
Wide Range ◽  
Series Resonant ◽  
Zero Voltage ◽  
Voltage Switching

This paper presents a phase shifted series resonant converter with step up high frequency transformer to achieve the functions of high output voltage, high power density and wide range of Zero Voltage Switching (ZVS). In this approach, the output voltage is controlled by varying the switching frequency. The controller has been designed to achieve a good stability under different load conditions. The converter will react to the load variation by varying its switching frequency to satisfy the output voltage requirements. Therefore in order to maintain constant output voltage, for light load (50% of the load), the switching frequency will be decreased to meet the desired output, while for the full load (100%) conditions, the switching frequency will be increased. Since the controlled switching frequency is limited by the range between the higher and lower resonant frequencies , the switches can be turned on under ZVS. In this study, a laboratory experiment has been conducted to verify the effectiveness of the system performance.

scholarly journals Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2867
Author(s):  
Furkan Karakaya ◽  
Özgür Gülsuna ◽  
Ozan Keysan
Keyword(s):  
Power Density ◽  
Power Converter ◽  
Switching Frequency ◽  
Passive Component ◽  
High Electron ◽  
Square Wave ◽  
Zero Voltage Switching ◽  
Gan Hemts ◽  
Zero Voltage ◽  
Voltage Switching

There are trade-offs for each power converter design which are mainly dictated by the switching component and passive component ratings. Recent power electronic devices such as Gallium Nitride (GaN) transistors can improve the application range of power converter topologies with lower conduction and switching losses. These new capabilities brought by the GaN High Electron Mobility Transistors (HEMTs) inevitably changes the feasible operation ranges of power converters. This paper investigates the feasibility of Buck and Boost based bi-directional DC/DC converter which utilizes Quasi-Square-Wave (QSW) Zero Voltage Switching (ZVS) on GaN HEMTs. The proposed converter applies a high-switching frequency at high output power to maximize the power density at the cost of high current ripple with high frequency of operation which requires a design strategy for the passive components. An inductor design methodology is performed to operate at 28 APP with a switching frequency of 450 kHz. In order to minimize the high ripple current stress on the output capacitors an interleaving is performed. Finally, the proposed bi-directional converter is operated at 5.4 kW with 5.24 kW/L or 85.9 W/in3 volumetric power density with air-forced cooling. The converter performance is verified for buck and boost modes and full load efficiencies are recorded as 97.7% and 98.7%, respectively.

Series connection of power switches for very high-power applications and zero-voltage switching

2000 ◽  
Vol 15 (1) ◽  
pp. 44-50 ◽  
Author(s):  
E.H. Watanabe ◽  
M. Aredes ◽  
L.F. Willcox de Souza ◽  
M.D. Bellar
Keyword(s):  
High Power ◽  
Series Connection ◽  
Zero Voltage Switching ◽  
Power Switches ◽  
Zero Voltage ◽  
Very High ◽  
Voltage Switching
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