A SINGLE-STAGE PHASE-SHIFTED FULL-BRIDGE ELECTRONIC BALLAST FOR HIGH-PRESSURE MERCURY LAMPS

2010 ◽  
Vol 19 (06) ◽  
pp. 1245-1258 ◽  
Author(s):  
HUANG-JEN CHIU ◽  
YU-KANG LO ◽  
CHUN-JEN YAO ◽  
CHING-CHUN CHUANG ◽  
MING-HSIANG TSENG ◽  
...  
Keyword(s):  
High Pressure ◽  
High Frequency ◽  
Single Stage ◽  
High Luminance ◽  
Electronic Ballast ◽  
Zero Voltage Switching ◽  
High Power Factor ◽  
Projector Lamp ◽  
Zero Voltage ◽  
Laboratory Prototype

This paper presents a single-stage high-frequency full-bridge electronic ballast for high-pressure mercury lamps in high-luminance LCD projector systems. The studied electronic ballast is found to have high conversion efficiency due to its single-stage circuit with zero-voltage switching features. A high power factor can be achieved by using developed single-stage topology. The operation principles and design considerations are analyzed and discussed in detail. A laboratory prototype is designed and implemented for driving a 150 W projector lamp. The simulation and experimental waveforms are given to verify the feasibility of the proposed method.

scholarly journals An Isolated High Voltage Boost Current-Fed DC–DC Converter Based on 1:1 Transformer Multiplier Cells and ZVS Operation

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 102
Author(s):  
Abdulhakeem Alsaleem ◽  
Faleh Alsakran ◽  
Marcelo Godoy Simões
Keyword(s):  
High Frequency ◽  
Output Voltage ◽  
Low Voltage ◽  
Voltage Source ◽  
Design Guideline ◽  
Zero Voltage Switching ◽  
Voltage Stress ◽  
Zero Voltage ◽  
Laboratory Prototype ◽  
Voltage Switching

This paper presents a high step up, current fed, interleaved, isolated DC–DC converter with voltage multipliers and ZVS (zero voltage switching). The converter provides zero voltage switching for all active switches and provides a high step up voltage gain that is suitable for very low voltage source applications, such as PV and other renewable sources. In addition, this converter allows the utilization of very low voltage stress switches and diodes. It reduces the current stress by interleaving the input current, and reduces the voltage stress by utilizing a half bridge based multiplier cell integrated configuration at the output voltage while providing high frequency galvanic isolation. The isolation is achieved through the use of 1:1 transformers which are easier to design, and the need for a high turns ratio is absent in this converter. The main theory of operation and the design guideline are presented, as is a laboratory prototype, all to validate the concept.

A single-stage full-bridge electronic ballast for high-pressure mercury lamps

2008 ◽  
Author(s):  
Chun-Jen Yao ◽  
Huang-Jen Chin ◽  
Tai-Hung Wang ◽  
Shih-Jen Cheng ◽  
Yu-Kang Lo ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Stage ◽  
Electronic Ballast

scholarly journals Design and Implementation of 2.5kW IBFB-LLC DC/ DC Converter Using SiC Mosfet

2021 ◽  
Vol 31.2 (149) ◽  
pp. 7-14
Keyword(s):  
High Frequency ◽  
Power Flow ◽  
Input Voltage ◽  
Voltage Range ◽  
Zero Voltage Switching ◽  
Design And Implementation ◽  
Switching Losses ◽  
Power Switches ◽  
Isolation Transformer ◽  
Zero Voltage

Interleaved Boost Full Bridge integrated LLC resonant (IBFB- LLC) is an isolated DC/DC converter with directional power flow, which can cope with a wide input voltage range of PV applications. The main losses of the converter are switching losses of the power switches and transformers losses. This paper proposes a method to improve the efficiency of the IBFB converter due to zero voltage switching technique, in combination with employing new SiC MOSFET technology instead of the conventional Si MOSFET. In addition, Litz wire is also adopted to reduce the losses on the high frequency isolation transformer. Both numerical simulations and experiments with a prototype 2.5kW converter are implemented to verify the feasibility and effectiveness of the proposed solution.

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