scholarly journals Research on Digital Synchronous Rectification for a High-Efficiency DC-DC Converter in an Auxiliary Power Supply System of Magnetic Levitation

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 51 ◽  
Author(s):  
Zhiqin Zhao ◽  
Xiaoqiong He
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
High Efficiency ◽  
Magnetic Levitation ◽  
Supply System ◽  
Zero Voltage Switching ◽  
Auxiliary Power ◽  
Zero Current Switching ◽  
Zero Current ◽  
Synchronous Rectification

In this paper, a new auxiliary power supply system of magnetic levitation based on the LLC DC-DC converter is proposed. The switches of the DC-DC converter are SiC MOSFET, which enables high frequency, high temperature, and high power density. For further improving the efficiency of the system and realizing the stability of the output voltage under different load conditions, the digital synchronous rectification (DSR) based on the phase shift control strategy is proposed. The prototype of the LLC DC-DC converter based on SiC MOSFET is implemented, which can realize zero voltage switching (ZVS) and zero current switching (ZCS). Then, the thermal image of DSR is presented, which proves that the power loss of SiC MOSFET with DSR is relatively low. Additionally, the system efficiency among the Si IGBT, SiC MOSFET, and SiC MOSFET with DSR is analyzed and the prototype demonstrates 98% peak efficiency. Finally, simulations, experiments, and data analysis prove the superiority of the proposed DSR strategy for the new auxiliary power supply system of magnetic levitation.

scholarly journals Resonant Hybrid Flyback, a New Topology for High Density Power Adaptors

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 363 ◽  
Author(s):  
Alfredo Medina-Garcia ◽  
Manfred Schlenk ◽  
Diego Morales ◽  
Noel Rodriguez
Keyword(s):  
Power Density ◽  
Pulse Width Modulation ◽  
High Efficiency ◽  
Full Range ◽  
Input Voltage ◽  
Zero Voltage Switching ◽  
Zero Current Switching ◽  
Zero Current ◽  
Class Power ◽  
World Class

In this article, an innovative power adaptor based on the asymmetrical pulse width modulation (PWM) flyback topology will be presented. Its benefits compared to other state-of-the-art topologies, such as the active clamp flyback, are analyzed in detail. It will also describe the control methods to achieve high efficiency and power density using zero-voltage switching (ZVS) and zero-current switching (ZCS) techniques over the full range of the input voltage and the output load, providing comprehensive guidelines for the practical design. Finally, we demonstrate the convenience of the proposed design methods with a 65 W adaptor prototype achieving a peak efficiency of close to 95% and a minimum efficiency of 93.4% at full load over the range of the input voltage, as well as a world-class power density of 22 W/inch3 cased.

Development of High Efficiency Contactless Power Supply System for Stocker System

2010 ◽  
Vol 24 (2) ◽  
pp. 77-85
Author(s):  
Gye-Ho Hwang ◽  
Won-Gon Kim ◽  
Jong-Bo Yun ◽  
In-Ho Moon ◽  
Bong-Seob Lee ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
High Efficiency ◽  
Supply System

Design of Dimmable LED Lighting for DC Storage Power Supply

2013 ◽  
Vol 311 ◽  
pp. 238-242
Author(s):  
Yong Nong Chang ◽  
Hung Liang Cheng ◽  
Chih Ming Kuo
Keyword(s):  
Power Supply ◽  
High Efficiency ◽  
Power Converter ◽  
Operating Efficiency ◽  
Resonant Converter ◽  
Led Lighting ◽  
Zero Current Switching ◽  
Zero Current ◽  
Circuit Structure ◽  
Driving Circuit

In this paper, a dimmable LED lighting driving circuit with high efficiency for DC storage power supply is proposed. In this research, Class-E resonant converter is principal circuit structure and possesses superior efficiency in the power converter. LED lighting set accompanied with multiple transformers in cascade are employed, which can improve current uniform problem and increase operating reliability. Furthermore, integral cycle switching technique will be utilized to implement the dimmer design, integral cycle switching control dimmer possesses the advantage of zero-current-switching (ZCS) and can effectively promote the operating efficiency

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